Updated on 2022/04/21

写真a

 
UEHARA Kazuhiro
 
Organization
Faculty of Natural Science and Technology Professor
Position
Professor
External link

Degree

  • Doctor of Engineering ( Tohoku University )

Research Interests

  • Wireless communication

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering

Education

  • Tohoku University   工学研究科   電子工学専攻

    1989.4 - 1992.3

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    Country: Japan

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  • Tohoku University   工学研究科   電子工学専攻

    1987.4 - 1989.3

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    Country: Japan

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  • Tohoku University   工学部   電子工学科

    1983.4 - 1987.3

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    Country: Japan

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Research History

  • Okayama University   Graduate School of Natural Science and Technology   Professor

    2016.4

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  • Tohoku University   School of High-Technology for Human Welfare   Part-time Lecturer

    2015.5

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  • Tohoku University   School of Engineering   Part-time Lecturer

    2013.11

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  • Radio Engineering and Electronics Association   Senior Director

    2013.8 - 2016.3

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  • Tokai University   School of High-Technology for Human Welfare   Part-time Lecturer

    2011.12

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  • Tokai University   School of High-Technology for Human Welfare   Part-time Lecturer

    2010.11

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  • Tohoku University   School of Engineering   Part-time Lecturer

    2009.12 - 2010.1

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  • Tokai University   School of High-Technology for Human Welfare   Part-time Lecturer

    2009.12

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  • Tohoku University   School of Engineering   Part-time Lecturer

    2008.12 - 2009.1

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  • Tohoku University   School of Engineering   Part-time Lecturer

    2007.12 - 2008.1

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  • Tohoku University   School of Engineering   Part-time Lecturer

    2006.12 - 2007.1

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  • Tohoku University   School of Engineering   Part-time Lecturer

    2005.12 - 2006.1

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  • Tohoku University   School of Engineering   Part-time Lecturer

    2004.11 - 2004.12

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  • Tohoku University   School of Engineering   Part-time Lecturer

    2003.12 - 2004.1

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  • Ferris University   Faculty of Letters   Invited Lecturer

    2003.7

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  • California Institute of Technology   Department of Electrical Engineering   Visiting Associate

    1997.4 - 1998.4

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  • Nippon Telegraph and Telephone Corporation   NTT Network Innovation Laboratories   Senior Manager

    1992.4 - 2016.3

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  • Japan Society for Promotion of Science   Research Fellowship for Young Scientists (DC2)

    1990.4 - 1992.3

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Professional Memberships

Committee Memberships

  • 総務省「電波資源拡大のための研究開発」研究開発運営委員会   委員  

    2021.11   

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    Committee type:Government

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  • IEICE Chugoku Branch   Committee Member  

    2021.5   

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    Committee type:Academic society

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  • The 24th International Symposium on Wireless Personal Multimedia Communications (WPMC 2021)   Domestic Preparatory Committee Member  

    2021.5 - 2021.12   

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    Committee type:Academic society

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  • IEEE Hiroshima Section   Cair  

    2021.1   

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  • The 23rd International Symposium on Wireless Personal Multimedia Communications (WPMC 2020)   Conference Operation Chair  

    2019.10 - 2020.10   

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    Committee type:Academic society

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  • 総務省 中国地域電波研究者連絡会   委員  

    2019.4   

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    Committee type:Government

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  • 電子情報通信学会 通信ソサイエティ 学術奨励賞選定委員会   幹事  

    2018.7 - 2020.6   

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  • 電子情報通信学会 研究会連絡会   委員  

    2018.6 - 2020.6   

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  • 電子情報通信学会 通信ソサイエティ 研専運営会議   副議長  

    2018.6 - 2020.6   

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  • 電子情報通信学会 通信ソサイエティ 執行委員会   委員  

    2018.6 - 2020.6   

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  • 電子情報通信学会 通信ソサイエティ英文論文誌編集委員会 英文論文小特集編集委員会   編集委員長  

    2017.10 - 2018.10   

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  • 総務省 「自律型モビリティシステム(自動走行・制御技術等)の開発・実証」に係る研究開発運営委員会   委員  

    2017.6 - 2019.3   

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    Committee type:Government

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  • 総務省 評価検討会   構成員  

    2017.5 - 2020.12   

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    Committee type:Government

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  • IEEE Hiroshima Section   Vice-Chair  

    2017.1 - 2018.12   

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  • 総務省 「IoT共通基盤技術の確立・実証」に係る研究開発運営委員会   座長  

    2016.12 - 2019.3   

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    Committee type:Government

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  • 内閣府 戦略的イノベーション創造プログラム(SIP) 推進委員会   委員  

    2016.6 - 2019.3   

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    Committee type:Government

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  • 電子情報通信学会 エレクトロニクスソサイエティ英文論文誌編集委員会 英文論文小特集編集委員会   編集委員  

    2016.2 - 2016.10   

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    Committee type:Academic society

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  • 2016 Singapore-Japan International Workshop on Smart Wireless Communications (SmartCom 2016)   Poster/Exhibition Session Co-Chair  

    2015.9 - 2016.5   

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  • IEICE   Delegates  

    2015.5 - 2016.5   

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    Committee type:Academic society

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  • 2015 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT2015)   Technical Program Committee Member  

    2015.1 - 2015.8   

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  • IEICE Tokyo Branch   Secretary  

    2014.5 - 2016.5   

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  • 2014 Singapore-Japan International Workshop on Smart Wireless Communications (SmartCom 2014)   Poster Session Co-Chair  

    2014.3 - 2014.10   

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  • 総務省 情報通信審議会 情報通信技術分科会 ITU部会 地上業務委員会 IMT WG   委員  

    2013.9 - 2016.9   

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    Committee type:Government

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  • 一般財団法人 電波技術協会 理事   理事  

    2013.8 - 2016.3   

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  • 総務省 情報通信審議会 情報通信技術分科会 ITU部会 放送業務委員会   専門委員  

    2013.7 - 2016.9   

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    Committee type:Government

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  • 一般社団法人 電波産業会(ARIB) 高度無線通信研究委員会 標準化部会   委員  

    2013.7 - 2016.5   

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  • 一般社団法人 電波産業会(ARIB) 高度無線通信研究委員会   委員  

    2013.7 - 2016.5   

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  • 一般社団法人 電波産業会(ARIB) 高度無線通信研究委員会 モバイルパートナーシップ部会   委員  

    2013.7 - 2016.5   

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  • YRP研究開発推進協会 ブロードバンドワイヤレスフォーラム 企画・戦略部会   委員  

    2013.7 - 2016.3   

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  • 電子情報通信学会 通信ソサイエティ英文論文誌編集委員会 英文論文小特集編集委員会   編集委員長  

    2011.8 - 2012.4   

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  • 電子情報通信学会 スマート無線(旧ソフトウェア無線)研究専門委員会   顧問  

    2011.5   

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  • IEICE Tokyo Branch   Councilor  

    2011.5 - 2013.5   

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    Committee type:Academic society

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  • 電子情報通信学会 通信ソサイエティ英文論文誌編集委員会 英文論文小特集編集委員会   編集委員長  

    2010.4 - 2010.12   

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    Committee type:Academic society

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  • 2011 International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom'11)   General Co-Chair  

    2010.2 - 2011.6   

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    Committee type:Academic society

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  • Wireless Communications Symposium of the IEEE International Conference on Communications, 2011 (ICC'11)   Technical Program Committee Member  

    2009.11 - 2011.6   

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  • YRP研究開発推進協会 ブロードバンドワイヤレスフォーラム 社会実証分科会   委員  

    2009.10 - 2010.3   

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    Committee type:Academic society

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  • IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium 2009 (PIMRC'09)   Technical Program Committee Member  

    2009.6 - 2009.7   

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  • 電子情報通信学会 ソフトウェア無線研究専門委員会   委員長  

    2009.5 - 2011.5   

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  • 独立行政法人 科学技術振興機構(JST) 統合無線技術検討会   委員  

    2008.7   

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  • 電子情報通信学会 通信ソサイエティ英文論文誌編集委員会 英文論文小特集編集委員会   編集副委員長  

    2007.3 - 2008.1   

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  • 電子情報通信学会 通信ソサイエティ英文論文誌編集委員会 英文論文小特集編集委員会   編集委員  

    2006.2 - 2006.12   

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  • 電子情報通信学会 ソフトウェア無線研究専門委員会   副委員長  

    2005.5 - 2009.5   

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  • 電子情報通信学会 通信ソサイエティ英文論文誌編集委員会 英文論文小特集編集委員会   編集委員  

    2004.12 - 2005.11   

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  • 電子情報通信学会 通信ソサイエティ英文論文誌編集委員会 英文論文小特集編集委員会   編集委員  

    2003.4 - 2003.12   

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  • 電子情報通信学会 ソフトウェア無線時限研究専門委員会   副委員長  

    2003.1 - 2005.5   

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    Committee type:Academic society

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  • 6th International Symposium on Wireless Personal Multimedia Communications (WPMC2003)   Technical Program Committee Member  

    2003.1 - 2003.12   

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  • 日本学術会議 モバイル・グローバル通信専門委員会   幹事補佐  

    2002.10 - 2004.3   

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    Committee type:Government

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  • 総務省 戦略的情報通信研究開発推進制度(SCOPE)   専門評価委員  

    2002.6 - 2011.3   

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    Committee type:Government

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  • 認可法人 通信・放送機構(TAO) 第4世代研究開発に関わる調査検討会 ソフトウェア無線委員会   委員  

    2002.2 - 2003.3   

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    Committee type:Government

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  • 電子情報通信学会 通信ソサイエティ英文論文誌編集委員会 英文論文小特集編集委員会   編集委員  

    2001.8 - 2002.12   

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  • 一般財団法人 テレコムエンジニアリングセンター(TELEC) 無線設備のソフトウェア技術に関する調査検討会   委員  

    2001.4 - 2004.3   

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  • 電子情報通信学会 ソフトウェア無線時限研究専門委員会   幹事  

    2001.3 - 2002.12   

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  • 電子情報通信学会 ソサイエティ論文誌編集委員会   常任査読委員  

    2000.4   

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  • 総務省 情報通信審議会 広帯域移動アクセスシステム アドホック   委員  

    2000.4 - 2002.3   

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  • 一般財団法人 電波産業会(ARIB) 25GHz帯広帯域移動アクセスシステム検討WG   委員  

    2000.4 - 2001.3   

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  • 認可法人 通信・放送機構(TAO) 車載型無線ICカードの汎用化・高度化技術の研究開発検討会   研究担当者  

    1998.4 - 2000.3   

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  • 一般社団法人 電波産業会(ARIB) 自動車通信システムにおける周波数有効利用技術の調査検討会路車間通信技術分科会   委員  

    1998.4 - 2000.3   

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  • 電子情報通信学会 ソフトウェア無線時限研究専門委員会   研究専門委員  

    1998.1 - 2001.2   

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Papers

  • Receivable Signal Sequence Number Increase in LED Visible Light Wireless Communications by Spatially Parallel Signal Transmission Reviewed

    Ryosuke Okamoto, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    IEICE Communications Express   2022.3

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  • Evaluation of sensor terminal signal separation performance based on modulation systems in storage-based batch signal processing using STFT Reviewed

    Takuyuki Hirakawa, Toru Nishiyama, Syo Nakaie, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    IEICE Communications Express   2022.3

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  • A new scheme of automatic modulation classification using Convolutional Neural Network with constellation diagram Reviewed International journal

    Yutao Liu, Toru Nishiyama, Shigeru Tomisato, Kazuhiro Uehara

    IEICE Communications Express   10 ( 8 )   492 - 497   2021.8

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  • Examination of signal separation/demodulation method of multi-value modulation sensor terminal signal using STFT in storage batch signal processing Reviewed International journal

    Toru Nishiyama, Takuyuki Hirakawa, Syo Nakaie, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    IEICE Communications Express   X10-B ( 8 )   458 - 462   2021.8

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  • Inter-system interference reduction of adaptive bandwidth control for multi-band wireless transmission Reviewed International journal

    Naoto Takamatsu, Shigeru Tomisato, Kazuhiro Uehara, Satoru Shimizu, Yoshinori Suzuki

    IEICE Communications Express   10 ( 6 )   337 - 342   2021.6

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  • Adaptive bandwidth control for multi-band OFDM transmission with spectrum sharing Reviewed International journal

    Yoshiki Inuzuka, Shigeru Tomisato, Kazuhiro Uehara, Satoru Shimizu, Yoshinori Suzuki

    IEICE Communications Express   9 ( 5 )   131 - 135   2020.5

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  • Transmission performance improvement by non-linear distortion noise power control in multi-band systems Reviewed

    Shigeru Tomisato, Jumpei Onji, Kazuhiro Uehara

    Special Issue: Wireless and Mobile Networks and Their Applications, International Journal of Computer and Software Engineering (IJCSE)   4 ( 143 )   2019.3

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    DOI: 10.15344/2456-4451/2019/143

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  • [Invited Paper] Research and development of software defined radio and cognitive radio technologies Invited Reviewed

    Kazuhiro Uehara

    IEICE Transactions on Communications (Japanese Edition)   J100-B ( 9 )   693 - 704   2017.9

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  • High-Capacity Wireless Access Networks Using 920 MHz Band for Wide-Area IoT/M2M Services Invited Reviewed

    Kazunori Akabane, Nobuaki Mochizuki, Shigeru Teruhi, Mamoru Kobayashi, Shuichi Yoshino, Masashi Shimizu, Kazuhiro Uehara

    IEICE TRANSACTIONS ON COMMUNICATIONS   E99B ( 9 )   1920 - 1929   2016.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    In the near future, many sensors and terminals will be connected to the public network to provide various convenient IoT/M2M services. In order to connect many sensors to the network efficiently, wireless communication systems in the 920MHz band are seen as attractive solutions. We are focusing on the 920MHz band to research and develop high-capacity protocols that can accommodate many terminals, and low power consumption technologies for battery-driven terminals. In this paper, we describe the following three concrete wireless systems that use our proposals. (1) A physical distribution pallet management system that can handle thousands of pallet-embedded sensors and a wireless module with a battery lifetime of about ten years. (2) Water leakage monitoring system for underground pipes by using sensors and a wireless module in each valve box. (3) A wide-area and high-capacity radio relay system for smart metering services like the reading of gas meters. The radio relay system can accommodate various sensors and terminals and has large potential for providing various IoT/M2M services in conjunction with smart metering services.

    DOI: 10.1587/transcom.2016SNI0001

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  • A Balanced mixer using asymmetric stacked lines for a quasi-millimeter wave band Reviewed

    Yo Yamaguchi, Takana Kaho, Ichihiko Toyoda, Kazuhiro Uehara, Tadao Nakagawa, Kiyomichi Araki

    IEICE Transactions on Communications (Japanese Edition)   J98-C ( 5 )   266 - 275   2016.5

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  • [Invited Paper] Multi-band concurrent RF frontend for user-centric wireless system Invited Reviewed

    Takana Kaho, Yo Yamaguchi, Hiroyuki Shiba, S. Oshima, Tadao Nakagawa, Kazuhiro Uehara

    IEICE Transactions on Communications (Japanese Edition)   J99-C ( 5 )   258 - 265   2016.5

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  • Concurrent Multi-Band Mixer with Independent and Linear Gain Control Reviewed

    Takana Kaho, Yo Yamaguchi, Hiroyuki Shiba, Tadao Nakagawa, Kazuhiro Uehara, Kiyomichi Araki

    IEICE TRANSACTIONS ON ELECTRONICS   E98C ( 7 )   659 - 668   2015.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    Novel multi-band mixers that can receive multiple band signals concurrently are proposed and evaluated. The mixers achieve independent gain control through novel relative power control method of the multiple local oscillator (LO) signals. Linear control is also achieved through multiple LO signal input with total LO power control. Theoretical analysis shows that odd-order nonlinearity components of the multiple LO signals support linear conversion gain control. Dual-and triple-band tests are conducted using typical three MOSFET mixers fabricated by a 0.25 mu m SiGe BiCMOS process. Measurements confirm over 40 dB independent control of conversion gain, linear control achieved through LO input power control. The proposed mixers have high input linearity with a 5 dBm output third intercept point. A method is also proposed to reduce interference caused by mixing between multiple LO signals.

    DOI: 10.1587/transele.E98.C.659

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  • Dependency on Beamwidth in an SD Method Utilizing Two-Ray Fading Characteristics Reviewed

    Ken Hiraga, Kazumitsu Sakamoto, Maki Arai, Tomohiro Seki, Hideki Toshinaga, Tadao Nakagawa, Kazuhiro Uehara

    IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS   14   56 - 59   2015

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    Using ray-tracing propagation calculation, we clarify the dependency on antenna element beamwidth of the channel capacity of a spatial division (SD) transmission method utilizing the characteristics of two-ray fading. It was clarified that the SD transmission method can be effectively applied to microstrip antennas or horn antennas with beamwidth of more than 10, but that it is not effective when applied to narrow-beam antennas with less than 10 beamwidth. In such cases, simple parallel transmission is a better way to utilize the narrow beam to increase channel capacity.

    DOI: 10.1109/LAWP.2014.2355258

    Web of Science

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  • Performance evaluation of a broadband spectrum sensing system for white space usage Reviewed

    Hiroyuki Shiba, Yo Yamaguchi, Takayuki Yamada, Takana Kaho, Tadao Nakagawa, Kazuhiro Uehara

    IEICE Transactions on Communications (Japanese Edition)   J97-B ( 12 )   1224 - 1233   2014.12

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  • Spatial Division Transmission without Signal Processing for MIMO Detection Utilizing Two-Ray Fading Reviewed

    Ken Hiraga, Kazumitsu Sakamoto, Maki Arai, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara

    IEICE TRANSACTIONS ON COMMUNICATIONS   E97B ( 11 )   2491 - 2501   2014.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    This paper presents a spatial division (SD) transmission method based on two-ray fading that dispenses with the high signal processing cost of multiple-input and multiple-output (MIMO) detection and antennas with narrow beamwidth. We show the optimum array geometries as functions of the transmission distance for providing a concrete array design method. Moreover, we clarify achievable channel capacity considering reflection coefficients that depend on the polarization, incident angle, and dielectric constant. When the ground surface is conductive, for two-and three-element arrays, channel capacity is doubled and tripled, respectively, over that of free space propagation. We also clarify the application limit of this method for a dielectric ground by analyzing the channel capacity's dependency on the dielectric constant. With this method, increased channel capacity by SD transmission can be obtained merely by placing antennas of wireless transceiver sets that have only SISO (single-input and single-output) capability in a two-ray propagation environment. By using formulations presented in this paper for the first time and adding discussions on the adoption of polarization multiplexing, we clarify antenna geometries of SD transmission systems using polarization multiplexing for up to six streams.

    DOI: 10.1587/transcom.E97.B.2491

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  • Performance evaluation of a simple decoding method for millimeter-wave short-range MIMO transmission through a wall Reviewed

    Kazumitsu Sakamoto, Ken Hiraga, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara

    IEICE Communications Express   3 ( 4 )   131 - 137   2014.4

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  • Study on MIMO transmission using orthogonal directivities obtained from higher order microstrip antenna modes Reviewed

    M. Arai, T. Seki, K. Hiraga, K. Sakamoto, H. Toshinaga, T. Nakagawa, K. Uehara

    ELECTRONICS LETTERS   50 ( 7 )   562 - 564   2014.3

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    A simpler MIMO transmission method using orthogonal directivities is proposed. In future wireless communication systems, higher data rates will be required since large amounts of data will be transmitted and received. MIMO technology is useful for achieving higher data rates. However, since MIMO detection becomes complicated when the number of antennas becomes large, a simpler method should be considered. To solve this problem, the present authors proposed a spatial division method using orthogonal directivities. This previously proposed method to N streams is expanded transmission for application to much higher data rate systems. Furthermore, using higher order antenna modes at the same frequency to more easily obtain orthogonal directivities is proposed. To evaluate the proposed method, it is confirmed by numerical analysis that the capacity of the proposed method increases without MIMO detection when the number of antennas becomes large.

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  • A Study of Short-Range MIMO Transmission Utilizing Polarization Multiplexing for the Simplification of Decoding Reviewed

    Ken Hiraga, Kazumitsu Sakamoto, Kentaro Nishimori, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara

    IEICE TRANSACTIONS ON COMMUNICATIONS   E97B ( 2 )   459 - 468   2014.2

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    One of the procedures for increasing the number of multi-input and multi-output (MIMO) branches without increasing the computational cost for MIMO detection or multiplexing is to exploit parallel transmissions by using polarization multiplexing. In this paper the effectiveness of using polarization multiplexing is confirmed under the existence of polarization rotation, which is inevitably present in short-range multi-input and multi-output (SR-MIMO) channels with planar array antennas. It is confirmed that 8 x 8 SR-MIMO transmission system with polarization multiplexing has 60 bit/s/Hz of channel capacity. This paper also shows a model for theoretical cross polarization discrimination (XPD) degradation, which is useful to calculate XPD degradations on diagonal paths.

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  • Theoretical and experimental analysis of spatial division using antenna directivities in short-range MIMO transmission Reviewed

    M. Arai, T. Seki, K. Hiraga, T. Nakagawa, K. Uehara

    ELECTRONICS LETTERS   50 ( 2 )   65 - 66   2014.1

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    DOI: 10.1049/el.2013.3555

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  • An SD Method Utilizing Null Dependency on Transmission Distance Due to Two-Ray Fading Reviewed

    Ken Hiraga, Kazumitsu Sakamoto, Maki Arai, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara

    IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS   13   126 - 129   2014

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    A spatial division (SD) transmission method utilizing the characteristics of two-ray fading due to ground reflection with linear antenna arrays horizontal to the ground is proposed. Formulations of the optimum array arrangements as functions of the transmission distance and achievable channel capacity are clarified. For two- and three-element arrays, channel capacity is respectively doubled and tripled over that of free-space propagation. The proposed method provides increased capacity without the extra signal processing cost incurred when using conventional multiple-input-multiple-output (MIMO) transmission.

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  • Performance Evaluation of Short-Range MIMO Using a Method for Controlling Phase Difference between Each Propagation Channel Reviewed

    Kazumitsu Sakamoto, Ken Hiraga, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara

    IEICE TRANSACTIONS ON COMMUNICATIONS   E96B ( 10 )   2513 - 2520   2013.10

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    A Simple decoding method for short-range MIMO (SR-MIMO) transmission can reduce the power consumption for MIMO decoding, but the distance between the transceivers requires millimeter-order accuracy in order to satisfy the required transmission quality: In this paper, we propose a phase difference control method between each propagation channel to alleviate the requirements for the transmission distance accuracy. In the proposed method, the phase difference between each propagation channel is controlled by changing the transmission (or received) power ratio of each element of sub-array antennas. In millimeter-wave broadband transmission simulation, we clarified that when sub-array antenna spacing is set to 6.6 mm and element spacing of sub-array antenna is set to 2.48 mm, the proposed method can extend the transmission distance range satisfying the required transmission quality, which is that bit error rate (BER) before error correction is less than 10(-2) from 9 similar to 29 mm to 0 similar to 50 mm in QPSK, from 15 similar to 19 mm to 0 similar to 30 mm in 16QAM, and from only 15 mm to 4 similar to 22 mm in 64QAM.

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  • Effects of weight errors on capacity in simple decoding of short-range MIMO transmission Reviewed

    Ken Hiraga, Kazumitsu Sakamoto, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara

    IEICE Communications Express   2 ( 5 )   193 - 199   2013.5

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  • An SDM Method Utilizing Height Pattern Due to Two-Ray Fading Characteristics Reviewed

    Ken Hiraga, Kazumitsu Sakamoto, Maki Arai, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara

    IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS   12   1622 - 1626   2013

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    A spatial division multiplexing (SDM) transmission method utilizing the characteristics of two-ray fading without relying on narrow beam of the antennas is introduced. This letter formulates the optimized array antenna arrangements and channel capacity as functions of the transmission distance and shows achievable channel capacity for two-and three-element antenna arrays. The letter also describes bandwidth dependency up to 15% bandwidth based on an assumed application to 60-GHz-band gigabit wireless systems. The proposed method provides increased capacity comparable to multiple-input-multiple-output (MIMO) transmission without the extra signal processing cost incurred when using conventional MIMO.

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  • Nonlinear modeling and analysis on concurrent amplification of dual-band gaussian signals Reviewed

    Ikuma Ando, Gia Khanh Tran, Kiyomichi Araki, Takayuki Yamada, Takana Kaho, Yo Yamaguchi, Kazuhiro Uehara

    IEICE Transactions on Electronics   E96-C ( 10 )   1254 - 1262   2013

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    In the recently developed Flexible Wireless System (FWS), the same platform needs to deal with different wireless systems. This increases nonlinear distortion in its wideband power amplifier (PA) because the PA needs to concurrently amplify multi-band signals. By taking higher harmonics as well as inter- and cross-modulation distortion into consideration, we have developed a method to analytically evaluate the adjacent channel leakage power ratio (ACPR) and error vector magnitude (EVM) on the basis of the PA's nonlinear characteristics. We devise a novel method for modeling the PA amplifying dual-band signals. The method makes it possible to model it merely by performing a one-tone test, making use of the Volterra series expansion and the generalWiener model. We then use the Mehler formula to derive the closed-form expressions of the PA's output power spectral density (PSD), ACPR, and EVM. The derivations are based on the assumption that the transmitted signals are complex Gaussian distributed in orthogonal frequency division multiplexing (OFDM) transmission systems. We validate the method by comparing measurement and simulation results and confirm it can appropriately predict the ACPR and EVM performance of the nonlinear PA output with OFDM inputs. In short, the method enables correct modeling of a wideband PA that amplifies dualband signals merely by conducting a one-tone test. Copyright © 2013 The Institute of Electronics, Information and Communication Engineers.

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  • Study on short-range MIMO transmission using interference cancellation by antenna directivities Reviewed

    Maki Arai, Tomohiro Seki, Ken Hiraga, Tadao Nakagawa, Kazuhiro Uehara

    Asia-Pacific Microwave Conference Proceedings, APMC   395 - 397   2013

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    In this paper, a simple method for canceling interference by using antenna directivities is proposed for short-range transmission systems. For higher data transmission systems the millimeter-wave frequency bands are useful because of their wide bandwidths. Also, Multiple-Input Multiple-Output (MIMO) technology can be applied to these bands because the application enables channel capacity to be increased by using multiple antennas at the transmitter and receiver without expanding the frequency bandwidth. However, since MIMO transmission schemes are complicated we consider parallel transmission, a simple method for transmitting multiple data streams that is suitable for short-range MIMO transmission. We propose a simple method for canceling interference by using antenna directivities and improving channel capacity in parallel transmission. Numerical analysis shows that the method maximizes channel capacity at the optimal spacing Lopt = 2λ0. It is also found that the channel capacity of the method is 14 % higher than that of Eigenmode beamforming (EM-BF) for two transmission streams and 12 % higher for four streams. © 2013 IEEE.

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  • A broadband low-noise wide dynamic range SiGe front-end receiver IC for multi-band access points Reviewed

    Takana Kaho, Yo Yamaguchi, Hiroyuki Shiba, Munenari Kawashima, Hideki Toshinaga, Kazuhiro Uehara

    Asia-Pacific Microwave Conference Proceedings, APMC   267 - 269   2013

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    A broadband, low-noise, wide dynamic range front-end receiver IC is reported. It uses 0.25 μm SiGe BiCMOS process technology and consists of broadband variable gain low noise amplifiers (VGLNAs), down-conversion mixers, step attenuators, and buffer amplifiers. It can receive triple-band signals concurrently, and the chip size is only 3mm × 3mm. Its measured noise figure was under 3.2 dB and the measured conversion gain was around 30 dB in the broad frequency range from 300 MHz to 3 GHz. It has a wide gain control range of around 100 dB
    50 dB is controlled by the VGLNA and the step attenuator, and 50 dB by the mixer with novel relative power control method using dual LO signal. The gain control enhances the input 1dB compression point from -40 dBm to -21 dBm. © 2013 IEEE.

    DOI: 10.1109/APMC.2013.6695115

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  • Signal Separation and Reconstruction Method for Simultaneously Received Multi-System Signals in Flexible Wireless System Reviewed

    Takayuki Yamada, Doohwan Lee, Hiroyuki Shiba, Yo Yamaguchi, Kazunori Akabane, Kazuhiro Uehara

    IEICE TRANSACTIONS ON COMMUNICATIONS   E95B ( 4 )   1085 - 1092   2012.4

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    We previously proposed a unified wireless system called "Flexible Wireless System". Comprising of flexible access points and a flexible signal processing unit, it collectively receives a wideband spectrum that includes multiple signals from various wireless systems. In cases of simultaneous multiple signal reception, however, reception performance degrades due to the interference among multiple signals. To address this problem, we propose a new signal separation and reconstruction method for spectrally overlapped signals. The method analyzes spectral information obtained by the short-time Fourier transform to extract amplitude and phase values at each center frequency of overlapped signals at a flexible signal processing unit. Using these values enables signals from received radio wave data to be separated and reconstructed for simultaneous multi-system reception. In this paper, the BER performance of the proposed method is evaluated using computer simulations. Also, the performance of the interference suppression is evaluated by analyzing the probability density distribution of the amplitude of the overlapped interference on a symbol of the received signal. Simulation results confirmed the effectiveness of the proposed method.

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  • Effectiveness of Short-Range MIMO Using Dual-Polarized Antenna Reviewed

    Ken Hiraga, Tomohiro Seki, Kentaro Nishimori, Kazuhiro Uehara

    IEICE TRANSACTIONS ON COMMUNICATIONS   E95B ( 1 )   87 - 96   2012.1

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    Short-range Multiple-Input-Multiple-Output (SR-MIMO) transmission is an effective technique for achieving high-speed and short-range wireless communication. With this technique, however, the optimum aperture size of array antennas grows when the transmission distance is increased. Thus, antenna miniaturization is an important issue in SR-MIMO. In this paper, we clarify the effectiveness of using dual-polarized planar antennas as a means of miniaturizing SR-MIMO array antennas by measurements and analysis of MIMO transmission characteristics. We found that even in SR-MIMO transmission, the use of dual-polarized transmission enables higher channel capacity. Dual-polarized antennas can reduce by two thirds the array area that is needed to obtain the same channel capacity. For a transmission distance of two wavelengths, the use of a dual-polarized antenna improved the channel capacity by 26 bit/s/Hz while maintaining the same number of transmitters and receivers and the same antenna aperture size. Moreover, dual-polarized SR-MIMO has a further benefit when zero-forcing (ZF) reception without transmit beamforming is adopted, i.e., it effectively simplifies hardware configuration because it can reduce spatial correlation even in narrow element spacing. In this work, we confirmed that the application of dual-polarization to SR-MIMO is an effective way to both increase channel capacity and enhance transceiver simplification.

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  • Analyses of Antenna Displacement in Short-Range MIMO Transmission over Millimeter-Wave Reviewed

    Ken Hiraga, Tomohiro Seki, Kentaro Nishimori, Kenjiro Nishikawa, Ichihiko Toyoda, Kazuhiro Uehara

    IEICE TRANSACTIONS ON COMMUNICATIONS   E94B ( 10 )   2891 - 2895   2011.10

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    Short-range multiple-input and multiple-output (SR-MIMO) has attracted much attention, because the technique makes it possible to raise channel capacity to several hundred Gbit/s by utilizing the millimeter-wave band (e.g., 60 GHz band). Although the opposed transceiving antennas are assumed to be accurately positioned in previous studies regarding SR-MIMO, a very important issue is to evaluate the performance degradation due to displacement between MIMO transceivers. In SR-MIMO over the millimeter-wave band, any displacement is perceived as significant because the wavelength is small. This paper evaluates the influence on SR-MIMO transmission performance over millimeter-wave caused by displacement between the transmitting and receiving antennas. The channel capacity is found to degrade by 5% when the horizontal displacement is 1 mm and by 2.7% when the rotational displacement is 10 degrees. In addition, comparing performances obtained with a number of antenna array arrangements clarifies that a square pattern arrangement is suitable for short-range wireless transmission.

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  • A Low-Noise, High-Gain Quasi-Millimeter-Wave Receiver MMIC with a Very High Degree of Integration Using 3D-MMIC Technology Reviewed

    Takana Kaho, Yo Yamaguchi, Kazuhiro Uehara, Kiyomichi Araki

    IEICE TRANSACTIONS ON ELECTRONICS   E94C ( 10 )   1548 - 1556   2011.10

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    We present a highly integrated quasi-millimeter-wave receiver MMIC that integrates 22 circuits in a 3 x 2.3 mm area using three-dimensional MMIC (3D-MMIC) technology. The MMIC achieves low noise (3 dB) and high gain (41 dB) at 26 GHz by using an on-chip image reject filter. It integrates a multiply-by-eight (X8) local oscillator (LO) chain with the IF frequency of the 2.4 GHz band and can use low-cost voltage-controlled oscillators (VCO5) and demodulators in a 2-3 GHz frequency band. Multilayer inductors contribute to the miniaturization especially in a 2-12 GHz frequency band. Furthermore, it achieves a high dynamic range by using two step attenuators with a new built-in inverter using an N-channel depression field-effect transistor (FET). The power consumption of the MMIC is only 450 mW.

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  • Combined Nyquist and Compressed Sampling Method for Radio Wave Data Compression of a Heterogeneous Network System Reviewed

    Doohwan Lee, Takayuki Yamada, Hiroyuki Shiba, Yo Yamaguchi, Kazuhiro Uehara

    IEICE TRANSACTIONS ON COMMUNICATIONS   E93B ( 12 )   3238 - 3247   2010.12

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    To satisfy the requirement of a unified platform which can flexibly deal with various wireless radio systems we proposed and implemented a heterogeneous network system composed of distributed flexible access points and a protocol free signal processing unit Distributed flexible access points are remote RF devices which perform the reception of multiple types of radio wave data and transfer the received data to the protocol free signal processing unit through wired access network The protocol free signal processing unit performs multiple types of signal analysis by software To realize a highly flexible and efficient radio wave data reception and transfer we employ the recently developed compressed sensing technology Moreover we propose a combined Nyquist and corn pressed sampling method for the decoding signals to be sampled at the Nyquist rate and for the sensing signals to be sampled at the compressed rate For this purpose the decoding signals and the sensing signals are converted into the intermediate band frequency (IF) and mixed In the IF band the decoding signals are set at lower center frequencies than those of the sensing signals The down converted signals are sampled at the rate of four times of the whole bandwidth of the decoding signals plus two times of the whole bandwidth of the sensing signals The purpose of above setting is to simultaneously conduct Nyquist rate and compressed rate sampling in a single ADC Then all of odd (or even) samples are preserved and some of even (or odd) samples are randomly discarded This method reduces the data transfer burden in dealing with the sensing signals while guarantee ing the realization of Nyquist rate decoding performance Simulation and experiment results validate the efficiency of the proposed method

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  • An Analysis of Multi-Layer Inductors for Miniaturizing of GaAs MMIC Reviewed

    Yo Yamaguchi, Takana Kaho, Motoharu Sasaki, Kenjiro Nishikawa, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara, Kiyomichi Araki

    IEICE TRANSACTIONS ON ELECTRONICS   E93C ( 7 )   1119 - 1125   2010.7

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    Newly developed multi-layer inductors on GaAs three-dimensional MMICs are presented. We analyzed single-, double-, triple-, and quadruple-layer stacked-type inductors in what may be the first report on inductors on a GaAs MMIC with three or more layers. The performance of single- and multi-layer inductors was measured and calculated by electromagnetic field simulation. The multi-layer inductors produce 2-11 times higher inductance than that of conventional inductors on 2D-MMICs although they are the same size. This means that the proposed multi-layer inductors have smaller areas with the same inductances than those of conventional inductors. We also conducted the first-ever investigation of how performance factors such as parasitic capacitance, Q-factor, and self-resonant frequency are degraded in multi-layer inductors vis-a-vis those of conventional inductors. A microwave amplifier using multi-layer inductors was demonstrated and found to reduce circuit size by 20%.

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  • Ultra-high-speed transmission over millimeter-wave using microstrip antenna array Reviewed

    Ken Hiraga, Tomohiro Seki, Kentaro Nishimori, Kenjiro Nishikawa, Kazuhiro Uehara

    2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest   673 - 676   2010

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    In microwave frequency bands, we have found that the application of spatial division multiplexing (SDM) using a number of antenna arrays is particularly effective for short transmission distances. We were also able to raise channel capacity in short-distance communication to several hundred Gbit/s by utilizing parallel transmission over a 60-GHz band with its wide bandwidth. When utilizing this technology, displacement of TX and RX antennas occurs because of the need to adjust the position of antennas manually by users. Antenna displacement causes deterioration in channel capacity. Electromagnetic field analysis results clarified the impact on channel capacity of antenna displacement that occurs in short-range transmission applications. Our results showed that channel capacity degradation is 10% when the horizontal antenna displacement is 1.5 mm and channel capacity degradation is only 2.7% when the rotational antenna displacement is 10°. The channel capacity degradation is smaller with longer transmission distances. © 2010 IEEE.

    DOI: 10.1109/RWS.2010.5434243

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  • A Very Low Spurious X-Band Frequency Quadrupler with Very High Integration Using 3D-MMIC Technology Reviewed

    Yo Yamaguchi, Takana Kaho, Kazuhiro Uehara

    IEICE TRANSACTIONS ON ELECTRONICS   E91C ( 11 )   1744 - 1750   2008.11

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    A highly integrated frequency quadrupler MMIC that uses three-dimensional MMIC (3D-MMIC) technology is presented. It consists of four driver amplifiers, two doublers, and a 2-band elimination filter. These seven circuits are integrated in only a 2.36 mm(2) area. The filter sufficiently suppresses spurious output components. The third and fifth harmonic components, which are the spurious components nearest to the desired component, are well suppressed. The desired/undesired ratio is about 40 dB. The driver amplifiers make the quadrupler output a constant power of the desired multiplied signal under low input power. The MMIC supplies +5 dBm of the fourth harmonic component in the input power range from -10 dBm to +5 dBm. The power dissipation of the MMIC is only 160 mW.

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  • Performance evaluation of an autonomous adaptive base station that supports multiple wireless network systems Reviewed

    Kazunori Akabane, Hiroyuki Shiba, Munehiro Matsui, Kazuhiro Uehara

    IEICE TRANSACTIONS ON COMMUNICATIONS   E91B ( 1 )   22 - 28   2008.1

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    Various wireless systems are being developed to meet users' needs, and the rapid increase in frequency demand that accompanies the increasing popularity of wireless services means that more effective use of frequency resources is urgently needed. However, existing base stations are making no effort to use frequency resources effectively, and cooperation among wireless system base stations is needed to use frequency resources more effectively. Base stations can cooperate more efficiently if they are able to use multiple channels of many wireless systems simultaneously. We propose an autonomous adaptive base station (AABS) that can switch among various wireless systems the way software defined radio (SDR) base stations do. AABS can autonomously select and use the most suitable wireless system on the basis of user traffic and its hardware resources. Moreover, frequency resources are used effectively because AABS prevents unnecessary radio wave transmission when the number of users in the wireless systems decreases. AABS is also suitable for "multi-link communication" because it can use multiple channels of multiple wireless systems simultaneously. We developed AABS prototype and evaluated its performance. Our experimental and computer simulation results show the performance of AABS and its efficiency.

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  • A miniaturized in-phase power divider with a DC block function Reviewed

    Hitoshi Hayashi, Tadao Nakagawa, Kazuhiro Uehara, Yoshihiro Takigawa

    IEICE TRANSACTIONS ON ELECTRONICS   E90C ( 10 )   2022 - 2029   2007.10

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    This paper describes a miniaturized in-phase power divider with a DC block function. We first propose three types of miniaturized in-phase power dividers composed of two distributed transmission lines, a resistor, and three capacitors to function as a DC block. Then, we use a simulation to compare the dividers. The simulation results show that. by properly selecting circuit configuration, we both achieve broadband frequency characteristics and miniaturize circuitry as compared to the conventional Wilkinson power divider with two DC block capacitors. Finally, an experimental UHF power divider fabricated to test the design concept is presented. Over the frequency range from 0.44 to 0.66 GHz, the experimental power divider exhibits power splits of -3.2 +/- 0.2 dB, return losses greater than 20 dB. and isolation between output ports greater than 20 dB.

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  • An active terminal circuit and its application to a distributed amplifier Reviewed

    Hitoshi Hayashi, Munenari Kawashima, Tadao Nakagawa, Kazuhiro Uehara, Yoshihiro Takigawa

    IEICE TRANSACTIONS ON ELECTRONICS   E90C ( 6 )   1203 - 1208   2007.6

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    This paper describes a broadband active terminal circuit and its application to a distributed amplifier. In this study, we first analyzed and compared three types of active terminal circuits using representative circuit configurations, namely, an active terminal circuit with a common-emitter BJT, an active terminal circuit with a Darlington BJT pair, and an active terminal circuit with cascode-connected BJTs. The simulation results showed that the active terminal circuit with cascode-connected BJTs kept the matching condition up to high frequency. After the simulation, we fabricated a distributed amplifier that used an active terminal circuit with cascode-connected BJTs. The RF amplifier achieved a flat gain of 9.7 +/- 1.0 dB over a range of 3-15 GHz.

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  • Miniaturized broadbland lumped-element in-phase power dividers Reviewed

    Hitoshi Hayashi, Tadao Nakagawa, Kazuhiro Uehara, Yoshihiro Takigawa

    IEICE TRANSACTIONS ON ELECTRONICS   E90C ( 6 )   1222 - 1227   2007.6

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    This paper describes miniaturized broadband lumped-element in-phase power dividers. We first propose two types of miniaturized broadband lumped-element in-phase power dividers composed of two inductors, a resistor, and two capacitors. Next, we use a simulation to compare these dividers with conventional power dividers. The simulation results reveal that the proposed lumped-element in-phase power dividers can help miniaturize circuits (by decreasing inductances by about 30%, reducing the number of necessary capacitors by half, and decreasing necessary capacitances by about 30% as compared to conventional lumped-element dividers) and attain broadband frequency characteristics (by increasing normalized operating frequency bandwidths (f/fo) by about 80% as compared to conventional lumped-element dividers).

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  • Trends in broadband wireless communication systems and software defined radios Invited Reviewed

    Kazuhiro Uehara

    Interdisciplinary Information Sciences Journal   12 ( 2 )   163 - 172   2006.9

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  • IEEE 802.11 wireless LAN implemented on software defined radio with hybrid programmable architecture Reviewed

    T Shono, Y Shirato, H Shiba, K Uehara, K Araki, M Umehira

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS   4 ( 5 )   2299 - 2308   2005.9

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    This paper describes a prototype software defined radio (SDR) transceiver on a distributed and heterogeneous hybrid programmable architecture; it consists of a central processing unit (CPU), digital signal processors (DSPs), and pre/postprocessors (PPPs), and supports both Personal Handy Phone System (PHS), and IEEE 802.11 wireless local area network (WLAN). It also supports system switching between PHS and WLAN and over-the-air (OTA) software downloading. In this paper, we design an IFEE 802.11 WLAN around the SDR; we show the software architecture of the SDR prototype and describe how it handles the IEEE 802.11 WLAN protocol. The medium access control (MAC) sublayer functions are executed on the CPU, while the physical layer (PHY) functions such as modulation/demodulation are processed by the DSPs; higher speed digital signal processes are run on the PPP implemented on a field-programmable gate array (FPGA). The most difficult problem in implementing the WLAN in this way is meeting the short interframe space (SIFS) requirement of the IEEE 802.11 standard; we elucidate the potential weakness of the current configuration and specify a way of implementing the IEEE 802.11 protocol that avoids this problem. This paper also describes an experimental evaluation of the prototype for WLAN use, the results of which agree well with computer-simulation results.

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  • Proposal and performance evaluation of wireless AO/DI system employing PHS Reviewed

    Hiroyuki Shiba, Kazuhiro Uehara, Shuji Kubota

    IEICE Transactions on Communications (Japanese Edition)   J87-B ( 5 )   629 - 637   2004.5

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  • Adaptability check during software installation in software defined radio Reviewed

    Y Suzuki, H Harada, K Uehara, T Fujii, Y Yokoyama, K Oda, R Hidaka

    IEICE TRANSACTIONS ON COMMUNICATIONS   E86B ( 12 )   3401 - 3407   2003.12

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    This paper presents the summarized achievements of "Study Group on Software Technology for Radio Equipment" held at TELEC from April 2000 to March 2003. The Study Group specified the essential issues on Software Defined Radio (SDR), and discussed desirable methods to evaluate conformity to technical regulations in radios that can change RF characteristics only by changing software. The biggest objective in SDR is to build the architecture to allow users to install software exclusively in the combination of hardware and software that have passed the certification test. The Study Group has reached a solution by introducing the idea of "tally." This paper explains the concept of tally, and proposes two types of systems to use tallies in checking adaptability in combinations of hardware and software.

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  • Software defined radio prototype for PHS and IEEE 802.11 wireless LAN Reviewed

    H Shiba, T Shono, Y Shirato, Toyoda, I, K Uehara, M Umehira

    IEICE TRANSACTIONS ON COMMUNICATIONS   E85B ( 12 )   2694 - 2702   2002.12

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    A software defined radio (SDR) prototype based on a multiprocessor architecture (MPA) is developed. Software for Japanese personal handy phone system (PHS) of a 2G mobile system, and IEEE 802.11 wireless LAN, which has much wider bandwidth than the 2G systems, is successfully implemented. Newly developed flexible-rate pre-/post-processor (FR-PPP) achieves the flexibility and wideband performance that the platform needs. This paper shows the design of the SDR prototype and evaluates its performance by experiments that include PHS processor load and wireless LAN throughput characteristics and processor load.

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  • Proposal for system diversity on software-defined radio Reviewed

    Takashi Shono, Kazuhiro Uehara, Shuji Kubota

    IEICE Transactions on Fundamentals   E84-A ( 9 )   2346 - 2358   2001.9

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  • Design and evaluation of software radio using multiprocessor architecture for full-duplex real-time communication Reviewed

    Kazuhiro Uehara, Yasuo Suzuki, Hiroyuki Shiba, Hiroyuki Tanaka, Yusuke Asai, Takashi Shono, Shuji Kubota

    IEICE Transactions on Communications (Japanese Edition)   J84-B ( 7 )   1208 - 1215   2001.7

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  • Software radio base and personal station prototypes Reviewed

    Y Suzuki, K Uehara, M Nakatsugawa, Y Shirato, S Kubota

    IEICE TRANSACTIONS ON COMMUNICATIONS   E83B ( 6 )   1261 - 1268   2000.6

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    Software radio base and personal station prototypes are proposed and implemented. The prototypes are composed of RF/IF, A/D and D/A, pre- and post-processors. CPU, and DSP parts. System software is partitioned into CPU program and DSP program to use processor resources effectively. They support various air interfaces. some of which are equivalent to the 384 kbit/s transmission rate PHS (personal handy phone system) and a 96 kbit/s transmission rate system. The base station can also be used as a communication bridge between two systems. In order to ease IF Filter requirements, the zero-stuff method is employed. Basic transmission and receiving performances are evaluated in an experiment and their results agree well with those expected.

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  • Proposal for a novel beam combination method for indoor high-speed wireless communication systems Reviewed

    K Uehara, Y Takatori, K Kagoshima

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY   48 ( 5 )   1511 - 1517   1999.9

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    A novel beam combination method for wide-band digital indoor communication systems such as wireless LAN's and,wireless ATR l's is proposed. Crossed fan beams are used at the base station (BS) and personal stations (PS's), The beam combination method provides better transmission quality than the traditional pencil-beam combination and eliminates complex beam control in the BS, Maximum dispersion distributions in a transmission frequency bandwidth are calculated by a three-dimensional (3-D) indoor propagation delay simulation algorithm. A prototype fan-beam antenna for the PS is fabricated and measured at 20 GHz.

    DOI: 10.1109/25.790526

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  • Rigorous analysis of transient radiation mechanism of small Multi Sector Monopole Yagi-Uda array antenna using FDTD method Reviewed

    T Maruyama, K Uehara, T Hori, K Kagoshima

    INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS   12 ( 4 )   341 - 351   1999.7

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    The Multi Sector Monopole Yagi-Uda Antenna (MS-MPYA) can be used to realize low profile, multisector antennas. The MS-MPYA has an interesting feature; we can sharpen the beams by using the adjacent array effect if we set metallic fins between the arrays so as to hide the exciters. Otherwise, without the fins, undesired radiation from the adjacent arrays causes beam division. This paper shows the radiation mechanism by using transient solutions in the time domain calculated by the FDTD method to examine how electromagnetic waves interact with the directors, adjacent arrays, and fins in real time. We introduce the transient solutions for three types of MS-MPYA: with adjacent array and with fins, without adjacent array but with fins, and with adjacent arrays but without fins. The transient solutions show that the adjacent array's action is changed by the existence of the fins and caused beam division. Without fins, the adjacent arrays act as directors of the active array and cause beam division. With fins, the adjacent arrays reflect the wave coming from the main array and sharpen the beam. Copyright (C) 1999 John Wiley & Sons, Ltd.

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  • Design and analysis of small multi-sector antenna for wireless LANs made by monopole Yagi-Uda array antenna Reviewed

    Tamami Maruyama, Kazuhiro Uehara, Kenichi Kagoshima

    IEICE Transactions on Communications (Japanese Edition)   J80-B-II ( 5 )   424 - 433   1997.5

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  • 30-GHz multibeam antenna using bi-layer Butler matrix circuits Reviewed

    T Seki, K Uehara, K Kagoshima

    IEICE TRANSACTIONS ON COMMUNICATIONS   E79B ( 12 )   1778 - 1783   1996.12

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    We propose a novel feeding circuit for a 30 GHz planar multibeam antenna applied to high-speed wireless communication systems. The feeding circuit is a bi-layer 8-port Butler matrix constructed with phase adjusted slot-coupled hybrids and branch-line hybrids. The new circuit configuration eliminates troublesome vias and line crossings, so it can be manufactured by traditional photolithograph. The feeding circuit is designed by using the spectral domain moment method considering bonding film effects. A prototype of a multibeam antenna which has seven pencil-beams with 10 degrees beamwidths is manufactured and tested. the beam scan angle error is less than 3 degrees at 30 GHz.

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  • A planar sector antenna for indoor high-speed wireless communication systems Reviewed

    K Uehara, T Seki, K Kagoshima

    IEICE TRANSACTIONS ON COMMUNICATIONS   E79B ( 12 )   1773 - 1777   1996.12

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    For quasi millimeter-wave and millimeter-wave high-speed wireless communications over wireless LANs and wireless ATMs, narrow beam antennas have been shown to provide high transmission quality by suppressing the troublesome multipath effect. However, the diameter of sector antennas needed to create the narrow beams rapidly increases with the sector number. In addition, the cylindrical shape of typical sector antennas does not suit portable terminals. This paper shows a methodology for designing planar sector antennas that overcomes these problems. The proposed antenna uses two kinds of beams and the antenna gains are equalized in all sectors. The antenna is developed as a 4-beam subarray Fed by a planar Butler matrix circuit. The design method of the subarray and an evaluation of its characteristics in the 20 GHz band are discussed.

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  • A miniatuarized dual polarization antenna for a small wireless terminal Reviewed

    K Kagoshima, K Uehara, T Hori

    IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM - 1996 DIGEST, VOLS 1-3   1092 - 1095   1996

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  • Indoor propagation calculation considering antenna patterns using geometrical optics method Reviewed

    Kazuhiro Uehara, Tomohiro Seki, Kenichi Kagoshima

    IEICE Transactions on Communications (Japanese Edition)   J78-B-II ( 9 )   593 - 601   1995.9

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  • RIGOROUS ANALYSIS OF MICROSTRIP PHASED-ARRAY ANTENNAS USING A NEW FDTD METHOD Reviewed

    K UEHARA, K KAGOSHIMA

    ELECTRONICS LETTERS   30 ( 2 )   100 - 101   1994.1

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    A finite-difference time-domain (FDTD) algorithm for radiating antennas that involve multiple, phased excitation sources is presented. The algorithm has the potential to analyse phased array antennas in the time domain. The authors apply it to a two-element microstrip antenna (MSA) phased array on a finite substrate, and compare the results as gained with an existing method and experiments.

    DOI: 10.1049/el:19940109

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  • FDTD METHOD ANALYSIS OF MUTUAL COUPLING BETWEEN MICROSTRIP ANTENNAS Reviewed

    K UEHARA, K KAGOSHIMA

    IEICE TRANSACTIONS ON COMMUNICATIONS   E76B ( 7 )   762 - 764   1993.7

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    We analyze the mutual coupling between two microstrip antennas (MSAs) with the finite-difference time-domain (FDTD) method. It is suitable for substrates which have a complex configuration or include feed line structures. The mutual coupling between two MSAs on discontinuous orthogonal substrates is successfully calculated.

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  • Design of optics for a millimeter-wave phase-imaging system and its application to plasma diagnostics Reviewed

    Kazuhiro Uehara, Takeshi Yonekura, Hiroshi Nishimura, Kazuhito Miyashita, Koji Mizuno

    IEICE Transactions on Communications (Japanese Edition)   J76-B-II ( 1 )   28 - 36   1993.1

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  • Optimum design of Yagi-Uda antenna for millimeter-wave imaging Reviewed

    Kazuhiro Uehara, Hiroshi Nishimura, Takeshi Yonekura, Ken-Ichiro Natsume, Koji Mizuno

    IEICE Transactions on Communications (Japanese Edition)   J75-B-II ( 7 )   472 - 479   1992.7

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  • LENS-COUPLED IMAGING ARRAYS FOR THE MILLIMETER-WAVE AND SUBMILLIMETER-WAVE REGIONS Reviewed

    K UEHARA, K MIYASHITA, KI NATSUME, K HATAKEYAMA, K MIZUNO

    IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES   40 ( 5 )   806 - 811   1992.5

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    We have been developing four kinds of lens-coupled antenna imaging arrays for operation at millimeter- and submillimeter-wave frequencies. The comparison between dipole antennas, Yagi-Uda's, trap-loaded antennas, and microstrip patches will be discussed from the viewpoint of the matching with the detectors and optical systems. The radiation patterns and input impedance of each antenna have been calculated and measured to attain the optimum matching using model experiments. The trap-loaded antenna arrays have been successfully applied to plasma diagnostics at the Tsukuba GAMMA 10 tandem mirror.

    DOI: 10.1109/22.137382

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  • MILLIMETER-WAVE PHASE-IMAGING INTERFEROMETER FOR THE GAMMA-10 TANDEM MIRROR Reviewed

    K HATTORI, A MASE, A ITAKURA, M INUTAKE, S MIYOSHI, K UEHARA, T YONEKURA, H NISHIMURA, K MIYASHITA, K MIZUNO

    REVIEW OF SCIENTIFIC INSTRUMENTS   62 ( 12 )   2857 - 2861   1991.12

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    A millimeter-wave phase-imaging interferometer has been developed for the study of density profiles of the GAMMA 10 tandem mirror. The interferometer uses a 70-GHz klystron oscillator and a quasi-optical transmission system. The probe beam is expanded so as to fill an orthogonal view of a plasma cross section. The view is imaged onto a detector array. The detector array consists of beam-lead GaAs Schottky barrier diodes bonded to antennas fabricated using photolithographic techniques on a fused-quartz substrate. Two types of antennas, bow-tie and Yagi-Uda antennas have been used in order to provide an effective matching to millimeter-wave beams, and compared for the performance of an imaging system. The interferometers have been applied to the central-cell and plug-cell plasmas of GAMMA 10.

    DOI: 10.1063/1.1142172

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  • YAGI-UDA ARRAY FOR MILLIMETER-WAVE IMAGING Reviewed

    K MIZUNO, K UEHARA, H NISHIMURA, T YONEKURA, T SUZUKI

    ELECTRONICS LETTERS   27 ( 2 )   108 - 109   1991.1

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    An imaging array consisting of five Yagi-Uda antennas in a dielectric has been constructed for 50 GHz that has antenna patterns suitable for millimetre-wave applications. Crosstalk levels of less than -30 dB between adjacent antennas in an f/1.0 imaging array have been measured in 5 GHz model experiments.

    DOI: 10.1049/el:19910072

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Books

  • Knowledge base

    ( Role: Contributor)

    IEICE  2019.5 

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    Responsible for pages:pp. 10-17   Language:Japanese

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  • 設計技術シリーズ ソフトウェアで作る無線機の設計法

    ( Role: Contributor)

    Kagakujyoho Shuppan Co., Ltd.  2016.9 

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    Total pages:290   Responsible for pages:pp. 226-232   Language:Japanese Book type:Textbook, survey, introduction

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  • 2030年の情報通信技術─生活者の未来像

    ( Role: Supervisor (editorial))

    NTT Publishing Co., Ltd.  2015.7 

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    Responsible for pages:pp. 27-68   Language:Japanese Book type:General book, introductory book for general audience

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  • 日経BPムック, 絶対わかる! 無線LAN超入門

    ( Role: Contributor)

    Nikkei Business Publications, Inc.  2014.8 

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    Responsible for pages:pp. 106-107   Language:Japanese Book type:General book, introductory book for general audience

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  • 無線技術とその応用4, 新世代ワイヤレス技術

    ( Role: Contributor)

    Maruzen Publishing Co., Ltd.  2004.3  ( ISBN:4621073648

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    Total pages:295   Responsible for pages:pp. 37-42, 53-69   Language:Japanese Book type:Scholarly book

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  • Mobile Overview 2003

    ( Role: Contributor)

    C.media, Inc.  2002.11 

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    Total pages:489   Responsible for pages:pp. 196-206   Language:Japanese Book type:Scholarly book

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  • 最新モバイル・インターネット徹底解剖

    ( Role: Joint author)

    Nikkei Business Publications, Inc.  2002.9  ( ISBN:4822213900

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    Responsible for pages:pp. 255-262   Language:Japanese Book type:General book, introductory book for general audience

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  • Software Radio: Technologies and Services

    Shuji Kubota, Kazuhiro Uehara, Masashi Nakatsugawa( Role: Contributor ,  SDR Applications for the Next Generation Wireless Access: Prototype Implementation)

    Springer-Verlag London Ltd.  2001.1 

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    Responsible for pages:pp. 227-235   Language:English Book type:Scholarly book

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  • Broadband Wireless Communications: Transmission, Access and Service

    Kenichi Kagoshima, Kazuhiro Uehara, Yasushi Takatori, Toshikazu Hori, Keizo Cho( Role: Contributor ,  Broadband wireless access system antennas: concepts and designs)

    Springer-Verlag London Ltd.  1998.2 

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    Responsible for pages:pp. 149-161   Language:English Book type:Scholarly book

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  • Active Antennas and Quasi-Optical Arrays

    Kazuhiro Uehara, Kazuhito Miyashita, Ken-Ichiro Natsume, Kouki Hatakeyama, Koji Mizuno( Role: Contributor ,  Chapter 5 (Beam Control), Lens-coupled imaging arrays for the millimeter- and submillimeter-wave regions)

    Wiley-IEEE Press  1998.1 

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    Responsible for pages:pp. 198-203   Language:English Book type:Scholarly book

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MISC

  • 蓄積一括信号処理による連続位相信号の分離・復調技術の検討 Reviewed

    日笠智文, 平川拓志, 中家翔, 冨里繁, 田野哲, 上原一浩

    2021年 電子情報通信学会総合大会, 通信講演論文集1   ( B-5-42 )   353   2022.3

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  • 水位計用アンテナ特性に対する水の影響に関する検討 Reviewed

    山口晄一, 山本修平, 冨里繁, 上原一浩

    2021年 電子情報通信学会総合大会, 通信講演論文集1   ( BS-2-2 )   S-15   2022.3

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  • LED可視光通信用送受協調線形化におけるプリディストーション特性の誤差の影響 Reviewed

    得居紀宏, 冨里繁, 田野哲, 上原一浩

    2021年 電子情報通信学会総合大会, 通信講演論文集1   ( B-18-7 )   318   2022.3

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  • Evaluation of signal separation / demodulation performance of signals with different modulation systems in storage batch signal processing Reviewed

    Takuyuki Hirakawa, Toru Nishiyama, Syo Nakaie, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    2021 International Conference on Emerging Technologies for Communications (ICETC 2021)   ( P2-4 )   2021.12

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  • Receivable signal sequence number increase by spatially parallel signal transmission in LED visible light wireless communications Reviewed

    Ryosuke Okamoto, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    2021 International Conference on Emerging Technologies for Communications (ICETC 2021)   ( B3-2 )   2021.12

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  • LED可視光通信における周波数特性及び非線形歪補償による受信特性改善

    得居紀宏, 冨里繁, 田野哲, 上原一浩

    第23回IEEE広島支部学生シンポジウム(HISS)   ( TP-A-9 )   27 - 30   2021.11

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  • LED可視光通信用送受協調線形化の高効率変調における受信特性改善効果

    劉正欣, 平井啓太郎, 冨里繁, 田野哲, 上原一浩

    第23回IEEE広島支部学生シンポジウム(HISS)   ( TP-B-9 )   108 - 110   2021.11

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  • 空間的並列信号伝送を用いたLED可視光無線通信における送信信号の適応分配手法の検討

    日笠颯汰, 冨里繁, 田野哲, 上原一浩

    第23回IEEE広島支部学生シンポジウム(HISS)   ( TP-C-9 )   184 - 187   2021.11

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  • 地下・地上間無線通信における伝搬損失低減に関する一検討

    山本修平, 木村征司, 山口晄一, 冨里繁, 上原一浩

    第23回IEEE広島支部学生シンポジウム(HISS)   ( TP-A-10 )   31 - 34   2021.11

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  • 被干渉システムの使用帯域に応じたフィルタリングを用いるマルチバンドシステム用帯域幅制御手法の検討

    安田翔悟, 冨里繁, 上原一浩

    第23回IEEE広島支部学生シンポジウム(HISS)   ( TP-B-8 )   104 - 107   2021.11

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  • 蓄積一括信号処理による帯域制限された信号の分離性能評価

    平川拓志, 西山徹, 中家翔, 冨里繁, 田野哲, 上原一浩

    第23回IEEE広島支部学生シンポジウム(HISS)   ( TP-A-8 )   25 - 26   2021.11

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  • 被干渉システムの使用帯域に応じたマルチバンド無線通信システム用帯域幅制御手法の検討

    飯田大嗣, 冨里繁, 上原一浩

    第23回IEEE広島支部学生シンポジウム(HISS)   ( TP-D-7 )   250 - 253   2021.11

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  • 蓄積一括信号処理による連続位相信号の分離・復調技術の一検討

    日笠智文, 平川拓志, 中家翔, 冨里繁, 田野哲, 上原一浩

    2021年度(第72回)電気・情報関連学会中国支部連合大会講演論文集   ( R21-17-02 )   2021.10

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  • 他システムの利用帯域に応じたフィルタリングを用いるマルチバンドシステム用帯域幅制御手法

    安田翔悟, 冨里繁, 上原一浩

    2021年度(第72回)電気・情報関連学会中国支部連合大会講演論文集   ( R21-09-01 )   2021.10

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  • 可視光通信用LEDの周波数特性及び非線形歪補償の検討

    得居紀宏, 冨里繁, 田野哲, 上原一浩

    2021年度(第72回)電気・情報関連学会中国支部連合大会講演論文集   ( R21-09-02 )   2021.10

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  • LED可視光無線通信における適応送信分配を用いた空間的並列信号伝送の検討

    日笠颯汰, 冨里繁, 田野哲, 上原一浩

    2021年度(第72回)電気・情報関連学会中国支部連合大会講演論文集   ( R21-09-03 )   2021.10

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  • マルチバンドシステムにおける被干渉システムの使用帯域に応じた帯域幅制御による干渉低減効果

    飯田大嗣, 冨里繁, 上原一浩

    2021年度(第72回)電気・情報関連学会中国支部連合大会講演論文集   ( R21-09-04 )   2021.10

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  • 水位計用アンテナ特性に対する水の影響に関する検討

    山口晄一, 山本修平, 冨里繁, 上原一浩

    2021年度(第72回)電気・情報関連学会中国支部連合大会講演論文集   ( R21-10-04 )   2021.10

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  • 蓄積一括信号処理による多数信号の分離・復調技術の検討

    広瀬陸, 中家翔, 平川拓志, 冨里繁, 田野哲, 上原一浩

    2021年度(第72回)電気・情報関連学会中国支部連合大会講演論文集   ( R21-17-01 )   2021.10

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  • Coverage improvement by adaptive bandwidth control corresponding to radio channel fluctuation in multi-band IoT systems with spectrum sharing systems Invited Reviewed

    Wataru Okada, Shigeru Tomisato, Kazuhiro Uehara

    in Proceedings of the 20th International Symposium on Communications and Information Technologies (ISCIT 2021)   ( T3-3 )   101 - 104   2021.10

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  • SINR improvement by adaptive bandwidth control in multi-band IoT systems with spectrum sharing Invited Reviewed

    Kanta Haino, Shigeru Tomisato, Shigeru Tomisato, Kazuhiro Uehara

    in Proceedings of the 20th International Symposium on Communications and Information Technologies (ISCIT 2021)   ( T3-4 )   105 - 108   2021.10

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  • A compensation method for both amplitude deviation of frequency response and non-linear distortion in LED visible light wireless communications Invited Reviewed

    Takeru Fukuyama, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    in Proceedings of the 20th International Symposium on Communications and Information Technologies (ISCIT 2021)   ( T4-2 )   114 - 117   2021.10

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  • 蓄積一括信号処理における信号の重畳度とD/Uに関する信号分離性能の検討

    平川拓志, 西山徹, 中家翔, 冨里繁, 田野哲, 上原一浩

    2021年 電子情報通信学会総合大会, 通信講演論文集1   ( B-17-38 )   501   2021.3

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  • 地下・地上間無線通信における基地局アンテナ高さと伝搬損失の関係の一検討

    山本修平, 八幡一毅, 下田雄大, 冨里繁, 上原一浩

    2021年 電子情報通信学会総合大会, 通信講演論文集1   ( B-1-13 )   13   2021.3

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  • Convolutional Neural Network models for automatic modulation classification using constellation diagrams

    Yutao Liu, Toru Nishiyama, Shigeru Tomisato, Kazuhiro Uehara

    2021年 電子情報通信学会総合大会, 通信講演論文集1   ( B-17-39 )   502   2021.3

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  • 蓄積一括信号処理における信号の重畳度とEb/N0に関する信号分離性能の検討

    中家翔, 西山徹, 平川拓志, 冨里繁, 田野哲, 上原一浩

    2021年 電子情報通信学会総合大会, 通信講演論文集1   ( B-17-37 )   500   2021.3

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  • A study on window function and window width of STFT in collision signal separation and demodulation method using stored batch signal processing Reviewed

    Toru Nishiyama, Takuyuki Hirakawa, Syo Nakaie, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    2020 International Conference on Emerging Technologies for Communications (ICETC 2020)   ( C4-1 )   2020.12

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  • A study on automatic modulation classification of digital modulation signals using Convolutional Neural Network Reviewed

    Yutao Liu, Toru Nishiyama, Shigeru Tomisato, Kazuhiro Uehara

    2020 International Conference on Emerging Technologies for Communications (ICETC 2020)   ( B4-3 )   2020.12

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  • A bandwidth control method by adaptive multi-band selection for spectrum sharing wireless communication systems Reviewed

    Naoto Takamatsu, Shigeru Tomisato, Kazuhiro Uehara, Satoru Shimizu, Yoshinori Suzuki

    2020 International Conference on Emerging Technologies for Communications (ICETC 2020)   ( B2-1 )   2020.12

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  • Transmission performance of highly efficient modulation by collaborative linearization processing in both transmitter and receiver for LED visible light communications Reviewed

    Keitaro Hirai, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    2020 International Conference on Emerging Technologies for Communications (ICETC 2020)   ( C2-5 )   2020.12

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  • Transmission performance of a digital pre-distortion method followed by adaptive compander for LED visible light communications Reviewed

    Saroma Era, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    2020 International Conference on Emerging Technologies for Communications (ICETC 2020)   ( B3-5 )   2020.12

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  • Dive into Convolutional Neural Network with constellation diagram for automatic modulation classification

    Yutao Liu, Toru Nishiyama, Shigeru Tomisato, Kazuhiro Uehara

    第22回IEEE広島支部学生シンポジウム(HISS)   ( B-17 )   199 - 203   2020.11

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  • 送受協調線形化によるLED可視光通信における高効率変調の受信特性

    劉正欣, 平井啓太郎, 冨里繁, 田野哲, 上原一浩

    第22回IEEE広島支部学生シンポジウム(HISS)   ( B-20 )   211 - 213   2020.11

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  • 管理外システムの干渉とシステム間電力比に応じたマルチバンド無線システム用帯域幅制御手法

    灰野寛大, 冨里繁, 上原一浩

    第22回IEEE広島支部学生シンポジウム(HISS)   ( B-18 )   204 - 207   2020.11

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  • 地下・地上間無線通信における受信アンテナ高さの影響に関する検討

    山本修平, 八幡一毅, 下田雄大, 冨里繁, 上原一浩

    第22回IEEE広島支部学生シンポジウム(HISS)   ( B-19 )   208 - 210   2020.11

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  • 蓄積一括信号処理による干渉信号の電力の影響を踏まえた分離性能評価

    平川拓志, 西山徹, 中家翔, 冨里繁, 田野哲, 上原一浩

    第22回IEEE広島支部学生シンポジウム(HISS)   ( B-16 )   196 - 198   2020.11

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  • LED可視光無線通信における空間的並列伝送時の受信可能信号系列数の検討

    岡本亮祐, 冨里繁, 田野哲, 上原一浩

    第22回IEEE広島支部学生シンポジウム(HISS)   ( A-17 )   56 - 58   2020.11

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  • 蓄積一括信号処理を用いた衝突した信号の分離・復調方法におけるSTFT窓関数・窓幅の検討

    西山徹, 平川拓志, 中家翔, 冨里繁, 田野哲, 上原一浩

    第22回IEEE広島支部学生シンポジウム(HISS)   ( A-20 )   66 - 68   2020.11

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  • 蓄積一括信号処理によるセンサ端末信号分離・復調技術におけるEb/N0の影響の検討

    中家翔, 平川拓志, 西山徹, 冨里繁, 田野哲, 上原一浩

    第22回IEEE広島支部学生シンポジウム(HISS)   ( A-19 )   63 - 65   2020.11

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  • LED可視光通信における周波数特性の振幅偏差補償による受信特性改善

    福山豪, 冨里繁, 上原一浩

    第22回IEEE広島支部学生シンポジウム(HISS)   ( A-21 )   69 - 72   2020.11

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  • 周波数共用システムにおける伝搬路変動を考慮した帯域幅制御よる場所率改善効果の検討

    岡田航, 冨里繁, 上原一浩

    第22回IEEE広島支部学生シンポジウム(HISS)   ( A-18 )   59 - 61   2020.11

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  • [依頼講演] LED可視光無線通信における空間的並列信号伝送の検討 Invited

    冨里繁, 田野哲, 上原一浩

    電子情報通信学会技術研究報告   120 ( 249, RCS2020-121 )   66 - 70   2020.11

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  • 可視光通信用LEDの周波数特性における振幅偏差補償手法

    福山豪, 冨里繁, 田野哲, 上原一浩

    2020年度(第71回)電気・情報関連学会中国支部連合大会講演論文集   ( R20-09-01-04 )   2020.10

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  • 管理外システムの干渉電力に応じたマルチバンドシステム用帯域幅制御手法

    灰野寛大, 冨里繁, 上原一浩

    2020年度(第71回)電気・情報関連学会中国支部連合大会講演論文集   ( R20-09-01-01 )   2020.10

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  • 空間的並列伝送によるLED可視光無線通信における高速信号伝送の検討

    岡本亮祐, 冨里繁, 田野哲, 上原一浩

    2020年度(第71回)電気・情報関連学会中国支部連合大会講演論文集   ( R20-09-01-03 )   2020.10

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  • 周波数共用システムにおける伝搬路変動を考慮した帯域幅制御手法の検討

    岡田航, 冨里繁, 上原一浩

    2020年度(第71回)電気・情報関連学会中国支部連合大会講演論文集   ( R20-09-01-02 )   2020.10

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  • 蓄積一括信号処理を用いた衝突した信号の分離・復調方法におけるSTFT窓幅の一検討

    西山徹, 平川拓志, 中家翔, 冨里繁, 田野哲, 上原一浩

    2020年 電子情報通信学会通信ソサイエティ大会, 通信講演論文集1   ( B-17-5 )   291   2020.9

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  • Automatic modulation classification of digital modulation signals using Convolutional Neural Network with constellation diagram

    Yutao Liu, Toru Nishiyama, Shigeru Tomisato, Kazuhiro Uehara

    2020年 電子情報通信学会通信ソサイエティ大会, 通信講演論文集1   ( B-17-14 )   300   2020.9

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  • 周波数共用時の適応帯域選択によるシステム間干渉低減効果

    高松直登, 犬束欣生, 冨里繁, 上原一浩, 清水聡, 鈴木義規

    2020年 電子情報通信学会総合大会, 通信講演論文集1   ( B-17-38 )   548   2020.3

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  • An automatic modulation classification method using Convolutional Neural Network

    Yutao Liu, Toru Nishiyama, Shigeru Tomisato, Kazuhiro Uehara

    2020年 電子情報通信学会総合大会, 通信講演論文集1   ( B-17-5 )   515   2020.3

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  • 蓄積一括信号処理を用いた衝突した信号の分離・復調方法におけるSTFT窓関数の一検討

    西山徹, 宮地龍功, 大野文也, 冨里繁, 田野哲, 上原一浩

    2020年 電子情報通信学会総合大会, 通信講演論文集1   ( B-17-44 )   554   2020.3

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  • 高効率変調を用いたLED可視光通信における送受協調線形化手法

    平井啓太郎, 後藤晨兵, 冨里繁, 田野哲, 上原一浩

    2020年 電子情報通信学会総合大会, 通信講演論文集2   ( B-18-9 )   354   2020.3

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  • SR研のさらなる発展に向けて Invited

    上原一浩

    電子情報通信学会, スマート無線研究会20周年記念シンポジウム   2020.1

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  • マルチバンドIoTシステムにおける帯域幅制御帯域数に応じた干渉電力低減効果

    高松直登, 冨里繁, 上原一浩

    第21回IEEE広島支部学生シンポジウム(HISS)   ( B2-5 )   356 - 359   2019.11

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  • 非線形歪補償を用いたLED可視光無線通信の空間並列伝送時の伝送特性

    惠良紗呂磨, 冨里繁, 田野哲, 上原一浩

    第21回IEEE広島支部学生シンポジウム(HISS)   ( A2-1 )   82 - 84   2019.11

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  • A study on automatic modulation recognition using convolutional neural network with constellation diagram

    Yutao Liu, Toru Nishiyama, Shigeru Tomisato, Kazuhiro Uehara

    第21回IEEE広島支部学生シンポジウム(HISS)   ( B-2-1 )   342 - 344   2019.11

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  • プリディストーションと非線形歪雑音除去を用いたLED可視光通信方式

    平井啓太郎, 冨里繁, 田野哲, 上原一浩

    第21回IEEE広島支部学生シンポジウム(HISS)   ( B2-2 )   345 - 348   2019.11

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  • 蓄積一括信号処理を用いた衝突した信号の新しい分離・復調方法の一検討

    西山徹, 宮地龍功, 大野文也, 冨里繁, 田野哲, 上原一浩

    第21回IEEE広島支部学生シンポジウム(HISS)   ( B2-4 )   353 - 355   2019.11

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  • [ポスター講演] 屋内無線通信用LED可視光通信における干渉と非線形歪雑音除去手法の検討

    平井啓太郎, 冨里繁, 田野哲, 上原一浩

    電子情報通信学会技術研究報告   119 ( 265, SRW2019-39 )   63 - 68   2019.11

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  • [ポスター講演] LED可視光通信用送受協調型非線形歪補償を用いる空間的並列伝送の検討

    惠良紗呂磨, 冨里繁, 田野哲, 上原一浩

    電子情報通信学会技術研究報告   119 ( 265, SRW2019-42 )   73 - 78   2019.11

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  • 空間多重化を用いたLED可視光無線通信における非線形歪補償の効果

    惠良紗呂磨, 冨里繁, 田野哲, 上原一浩

    2019年度(第70回)電気・情報関連学会中国支部連合大会講演論文集   ( R19-09-02-04 )   2019.10

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  • LED可視光無線通信用繰り返し非線形歪雑音キャンセラの検討

    平井啓太郎, 冨里繁, 田野哲, 上原一浩

    2019年度(第70回)電気・情報関連学会中国支部連合大会講演論文集   ( R19-09-02-01 )   2019.10

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  • マルチバンドを用いるIoT端末の非線形性による受信特性評価

    高松直登, 冨里繁, 上原一浩

    2019年度(第70回)電気・情報関連学会中国支部連合大会講演論文集   ( R19-09-02-03 )   2019.10

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  • Automatic modulation classification using convolutional neural network with constellation diagram

    Yutao Liu, Toru Nishiyama, Shigeru Tomisato, Kazuhiro Uehara

    2019年度(第70回)電気・情報関連学会中国支部連合大会講演論文集   ( R19-09-01-04 )   2019.10

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  • 蓄積一括信号処理における多値変調センサ端末信号の信号分離・復調方法の一検討

    西山徹, 宮地龍功, 大野文也, 冨里繁, 田野哲, 上原一浩

    2019年度(第70回)電気・情報関連学会中国支部連合大会講演論文集   ( R19-09-01-05 )   2019.10

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  • LED lighting arrangement for spatially parallel signal transmission in visible light communications Reviewed

    Yusuke Kamei, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

    2019 IEEE 8th Global Conference on Consumer Electronics (GCCE 2019)   ( POS3.23 )   1147 - 1150   2019.10

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  • [ポスター講演] 蓄積一括信号処理における衝突した受信信号の分離・復調方法の一検討

    西山徹, 宮地龍功, 大野文也, 冨里繁, 田野哲, 上原一浩

    革新的無線通信技術に関する横断型研究会 (MIKA2019)   ( P4-3 )   2019.10

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  • [ポスター講演] LED可視光無線通信の空間的並列伝送時における受信可能信号数の評価

    亀井裕典, 冨里繁, 田野哲, 上原一浩

    革新的無線通信技術に関する横断型研究会 (MIKA2019)   ( P3-26 )   2019.10

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  • 地下構造物の電波伝搬モデリングに関する一検討

    八幡一毅, 堀内陵希, 冨里繁, 上原一浩

    2019年 電子情報通信学会通信ソサイエティ大会, 通信講演論文集1   ( B-1-24 )   24   2019.9

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  • 蓄積一括信号処理による信号分離・復調方法の一検討

    西山徹, 宮地龍功, 大野文也, 冨里繁, 田野哲, 上原一浩

    2019年 電子情報通信学会通信ソサイエティ大会, 通信講演論文集1   ( B-17-12 )   352   2019.9

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  • 周波数共用システムの受信電力比に応じた帯域幅制御による干渉低減

    犬束欣生, 冨里繁, 上原一浩, 清水聡, 鈴木義規

    2019年 電子情報通信学会通信ソサイエティ大会, 通信講演論文集1   ( B-17-19 )   359   2019.9

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  • Optical Radio Channel Propagation in Wireless Communication Systems with LEDs Reviewed

    Satoshi Denno, Shunsuke Fujitaka, Yafei Hou, Shigeru Tomisato, Kazuhiro Uehara

    12th Global Symposium on Millimeter-Waves 2019, GSMM 2019   ( FR1-4 )   68 - 70   2019.5

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  • 周波数共用システムの帯域外雑音低減によるシステム間干渉制御

    上田恭平, 冨里繁, 上原一浩, 清水聡, 鈴木義規

    2019年 電子情報通信学会総合大会, 通信講演論文集2   ( B-17-6 )   433   2019.3

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  • LED可視光通信における空間的並列信号伝送のための照明配置方法の検討

    亀井裕典, 冨里繁, 田野哲, 上原一浩

    電子情報通信学会技術研究報告   118 ( 476, SRW2018-64 )   41 - 46   2019.3

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  • 無線信号処理クラウド化のカギ握る電波データ圧縮伝送技術

    李斗煥, 山田貴之, 芝宏礼, 山口陽, 中川匡夫, 上原一浩

    日経テクノロジーオンライン   2016.7

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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  • Radio spectrum transmission using compressed sensing for a Flexible Wireless System Invited

    Doohwan Lee, Takayuki Yamada, Hiroyuki Shiba, Yo Yamaguchi, Tadao Nakagawa, Kazuhiro Uehara

    Journal of IEICE   99 ( 5 )   450 - 455   2016.5

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  • Current status, issues, and future perspective of wireless home networks

    Yasushi Takatori, Masato Mizoguchi, Kazuhiro Uehara, Shuichi Yoshino, Mitsuru Harada, Kazuyasu Okada

    NTT Technical Review   11 ( 3 )   1 - 5   2013.3

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  • Current status, issues, and future perspective of wireless home networks

    Yasushi Takatori, Masato Mizoguchi, Kazuhiro Uehara, Shuichi Yoshino, Mitsuru Harada, Kazuyasu Okada

    NTT Gijyutsu Journal   25 ( 1 )   12 - 15   2013.1

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  • 無線LANのすべて[第8回], 超高速を実現するミリ波無線LAN Invited

    Ichihiko Toyoda, Ken Hiraga, Kazuhiro Uehara

    Nikkei Communications   76 - 77   2011.5

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  • Flexible Wireless System Invited

    Yo Yamaguchi, Hiroyuki Shiba, Takana Kaho, Takayuki Yamada, Doohwan Lee, Kazuhiro Uehara

    Radio Engineering and Electronics Association Newsletter, FORN   ( 279 )   2 - 5   2011.3

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  • Towards ultrahigh-speed high-capacity networks

    Masahiko Jinno, Hideaki Kimura, Yoshinori Hibino, Kazuhiro Uehara, Naoya Kukutsu, Fumihiko Ito, Shinji Matsuoka

    NTT Technical Review   7 ( 5 )   1 - 8   2009.5

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    This article introduces technologies that will lead to future photonic networks that support ultrahigh capacities of 100 Gbit/s or more and services with low-latency end-to-end paths (huge-bandwidth services) as a common platform around 2020. Such networks will have on-demand, economical, and highly reliable access and core networks. Technology trends, requirements to be met, and challenges to be overcome are also described.

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  • Towards ultrahigh-speed high-capacity networks

    Masahiko Jinno, Hideaki Kimura, Yoshinori Hibino, Kazuhiro Uehara, Naoya Kukutsu, Fumihiko Ito, Shinji Matsuoka

    NTT Technical Journal   20 ( 11 )   54 - 59   2008.11

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  • Introduction to NTT patents: Multisector antenna (0) Invited

    Kazuhiro Uehara, Tomohiro Seki, Kenichi Kagoshima

    NTT Technical Review   5 ( 6 )   1 - 3   2007.6

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  • Introduction to NTT patents: Multisector antenna Invited

    Kazuhiro Uehara, Tomohiro Seki, Kenichi Kagoshima

    NTT Gijyutsu Journal   19 ( 6 )   67 - 68   2007.6

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  • Trends in Software Defined Radios Invited

    Kazuhiro Uehara

    Monthly JADI   ( 713 )   1 - 19   2006.10

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  • Proposal and performance evaluation of wireless AO/DS system employing PHS (Translated from IEICE Transactions on Communications (Japanese Edition) Invited International journal

    Hiroyuki Shiba, Kazuhiro Uehara, Shuji Kubota

    Electronics and Communications in Japan (Part 1: Communications)   88 ( 5 )   10 - 19   2005.5

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  • Trends in research and development of software defined radio

    Kazuhiro Uehara, Katsuhiko Araki, Masahiro Umehira

    NTT Technical Review   1 ( 4 )   10 - 14   2003.7

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  • PHSから無線LANまで異なる無線方式に対応できるソフトウェア無線機を開発 Invited

    Kazuhiro Uehara

    NTT R&D   51 ( 3 )   266 - 267   2002.3

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  • PHSから無線LANまで異なる無線方式に対応できるソフトウェア無線機を試作 Invited

    Kazuhiro Uehara

    Journal of IEICE   85 ( 3 )   222   2002.3

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  • PHSから無線LANまで異なる無線方式に対応できるソフトウェア無線機を開発 Invited

    Kazuhiro Uehara

    NTT Gijyutsu Journal   14 ( 2 )   74 - 75   2002.2

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  • Trends in the research and development of software radio

    Kazuhiro Uehara, Masashi Nakatsugawa, Shuji Kubota, Hideki Mizuno

    NTT R&D   50 ( 1 )   33 - 40   2001.1

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  • Standardization activiteis for software defined radio

    Masashi Nakatsugawa, Makoto Sugita, Kazuhiro Uehara

    NTT R&D   50 ( 5 )   57 - 62   2001.1

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  • Design and analysis of small multi-sector antenna for wireless LANs based on monopole Yagi-Uda array antenna (Translated from IEICE Transactions on Communications (Japanese Edition), vol. J80-B-II, no. 5, pp. 424-433, May 1997.) Invited International journal

    Tamami Maruyama, Kazuhiro Uehara, Kenichi Kagoshima

    Electronics and Communications in Japan (Part 1: Communications)   81 ( 12 )   80 - 90   1998.12

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  • Indoor propagation calculation taking into account antenna patterns using geometrical optics method (Translated from IEICE Transactions on Communications (Japanese Edition), vol. J78-B-II, no. 9, pp. 593-601, Sept. 1995.) Invited International journal

    Kazuhiro Uehara, Tomohiro Seki, Kenichi Kagoshima

    Electronics and Communications in Japan (Part 1: Communications)   79 ( 5 )   92 - 102   1996.5

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    An algorithm to compute the effects of the radiation patterns and polarizations of arbitrary transmit and receive antenna is added to the conventional geometrical optics analysis procedure to study indoor propagation delay characteristics. A method is presented in which the angular information needed for the calculations of the foregoing in a rectangular room can be derived easily from the geometrical nature of the room. By means of the present procedure, the delay wave suppression effect of a narrow-beam antenna in a multipath propagation environment is shown quantitatively. For instance, in the case where both transmit and receive antennas are omnidirectional, the delay spread can be reduced to almost one-tenth if a pencil beam with a half-power beamwidth of 30 degrees is used. By means of these results, a design procedure for antenna half-power beamdwidth and the polarization was developed for realization of high-transmission quality in an indoor high-speed wireless data communication.

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  • Optics design for a millimeter‐wave phase‐imaging system and its application to plasma diagnostics (Translated from IEICE Transactions on Communications (Japanese Edition), vol. J76-B-II, no. 1, pp. 28-36, Jan. 1993.) Invited International journal

    Kazuhiro Uehara, Takeshi Yonekura, Hiroshi Nishimura, Kazuhito Miyashita, Koji Mizuno

    Electronics and Communications in Japan (Part 1: Communications)   76 ( 12 )   103 - 112   1993.12

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    A ten‐element imaging array which consists of an integrated antenna‐detector system that incorporates trap‐loaded Yagi antennas and Schottky diodes has been developed for operation in the millimeter‐wave band around 70 GHz. Also, a prototype optical system that comprises a millimeter‐wave phase‐imaging interferometer has been designed and fabricated. They were fitted to the GAMMA 10 tandem mirror at Tsukuba University. A real‐time measurement of the radial distribution of the plasma electron density was successfully demonstrated using those systems. Copyright © 1993 Wiley Periodicals, Inc., A Wiley Company

    DOI: 10.1002/ecja.4410761210

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  • Optimum design of yagi‐uda antenna for millimeter‐wave imaging (Translated from IEICE Transactions on Communications (Japanese Edition), vol. J75-B-II, no. 7, pp. 472-479, July 1992.) Invited International journal

    Kazuhiro Uehara, Hiroshi Nishimura, Takeshi Yonekura, Ken‐Ichiro Natsume, Koji Mizuno

    Electronics and Communications in Japan (Part 1: Communications)   76 ( 4 )   81 - 90   1993.4

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    A millimeter‐wave imaging array is proposed in which many Yagi‐Uda antennas are placed on a dielectric lens. By changing the dimensions of these antennas, the impedance matching with the detector is optimized. At the same time, a radiation pattern matched to the incident beam from the focusing optics is realized. The crosstalk between the adjacent detectors on the array is measured. An optimum spacing is derived and a good imaging property is realized. The present imaging array is suitable for MMIC and is applied in practice for plasma measurement for nuclear fusion research. Copyright © 1993 Wiley Periodicals, Inc., A Wiley Company

    DOI: 10.1002/ecja.4410760408

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Presentations

  • Basic Parameters and Fluctuation Measurements on GAMMA 10

    Atsushi Mase, Akiyoshi Itakura, Kunihiko Hattori, J. H. Jeong, Toshiro Kaneko, N. Yamaguchi, K. Ishii, Masaaki Inutake, Shoichi Miyoshi, Y. Matsuda, K. Muraoka, Kazuhiro Uehara, Takeshi Yonekura, Koji Mizuno

    Proceedings of the 4th International Symposium on Laser-Aided Plasma Diagnostics  1989 

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    Event date: 1989

    Language:English  

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  • 地下構造物の電波伝搬モデリングに関する一検討

    2018年 電子情報通信学会総合大会  2018 

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  • 周波数共用システムにおけるマルチバンド使用時のシステム間干渉評価

    電子情報通信学会スマート無線研究会  2018 

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  • LED可視光通信の非線形歪補償における受信機雑音の影響

    2018年 電子情報通信学会総合大会  2018 

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  • 周波数共用を行うマルチバンドシステムの適応帯域幅制御による干渉低減効果

    2018年 電子情報通信学会通信ソサイエティ大会  2018 

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  • LED可視光通信用送受信機における非線形歪補償の検討

    電子情報通信学会短距離無線通信研究会  2018 

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  • LED可視光無線通信における送受協調型非線形歪補償法の検討

    2018年 電子情報通信学会通信ソサイエティ大会  2018 

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  • Transmission quality improvement by LED back-off optimization for visible light wireless communications

    IEEE International Symposium on Wireless Personal Multimedia Communications (WPMC 2017)  2017 

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  • 地下構造物の電波伝搬モデリングに関する実験的検討

    第19回IEEE広島支部学生シンポジウム  2017 

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  • LED可視光通信用歪補償法における非線形定数の誤差による性能評価

    第19回IEEE広島支部学生シンポジウム  2017 

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  • マルチバンドを用いる周波数共用システムにおける受信特性改善手法の検討

    第19回IEEE広島支部学生シンポジウム  2017 

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  • 可視光通信におけるLED 線形化による受信特性改善効果

    2017年 電子情報通信学会総合大会  2017 

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  • LEDの飽和領域を利用する可視光通信の受信特性

    電子情報通信学会短距離無線通信研究会  2017 

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  • [ポスター講演] マルチバンド方式における非線形歪雑音電力制御による伝送効率改善効果

    電子情報通信学会ソフトウェア無線研究会  2017 

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  • 可視光通信におけるLEDの飽和制御による受信特性改善効果

    電子情報通信学会短距離無線通信研究会  2017 

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  • 可視光無線通信用LEDにおけるバックオフ最適化の検討

    2017年 電子情報通信学会通信ソサイエティ大会  2017 

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  • LED可視光無線通信用受信機における非線形歪補償法

    電子情報通信学会短距離無線通信研究会  2017 

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  • 可視光無線通信用LEDの受信機における非線形歪補償法の検討

    平成29年度電気・情報関連学会中国支部連合大会  2017 

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  • 帯域幅制御を用いたマルチバンド周波数共用システムの受信特性

    平成29年度電気・情報関連学会中国支部連合大会  2017 

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  • Joint interference alignment and power allocation under perfect and imperfect CSI

    IEEE Global Communications Conference (GLOBECOM2016)  2016 

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  • A centralized interference alignment (IA) design for multi-user MIMO interference channels

    映像情報メディア学会技術報告  2016 

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  • Joint interference alignment transceiver filter design and power allocation for downlink multi-user MIMO interference channels

    電子情報通信学会無線通信システム研究会  2016 

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  • ヘテロジーニアスネットワークでの干渉アラインメントにおける小型セルクラスタ化のための低演算量クラスタリングアルゴリズムの計算量解析

    2016年 電子情報通信学会総合大会  2016 

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  • [Invited Talk] Broadband spectrum sensing platform based on received waveform cross-correlation using distributed sensors

    電子情報通信学会スマート無線研究会  2016 

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  • 可視光通信用LEDの線形化における入力電力制限の影響評価

    2016年 電子情報通信学会通信ソサイエティ大会  2016 

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  • Interference alignment and power allocation for multi-user MIMO interference channels

    Wireless Communications Symposium, IEEE International Conference on Communications (ICC2016)  2016 

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  • マルチバンド方式における帯域外雑音制御信号の雑音低減効果

    平成28年度電気・情報関連学会中国支部連合大会  2016 

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  • 可視光通信用LEDの非線形歪による伝送特性劣化とその改善手法

    平成28年度電気・情報関連学会中国支部連合大会  2016 

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  • マルチバンドシステムにおける雑音制御信号による帯域外雑音低減効果

    第18回IEEE広島支部学生シンポジウム  2016 

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  • マルチバンド方式における非線形歪雑音電力制御による干渉低減効果

    電子情報通信学会スマート無線研究会  2016 

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  • 可視光通信用LEDにおけるプリディストーションによる非線形性の改善

    第18回IEEE広島支部学生シンポジウム  2016 

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  • Interference alignment for multi-user MIMO interference channels based on estimated uplink channels

    電子情報通信学会無線通信システム研究会  2016 

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  • 自己回帰モデルに基づくチャネルおよびウェイト予測を用いて時変チャネルを考慮した干渉アライメント

    2015年 電子情報通信学会通信ソサイエティ大会  2015 

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  • [パネル討論] 周波数有効利用に向けたスペクトルセンシング技術の研究開発

    電子情報通信学会短距離無線通信研究会  2015 

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  • [パネル討論] 周波数有効利用に向けたスペクトルセンシング技術の研究開発

    電子情報通信学会スマート無線研究会  2015 

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  • 将来ワイヤレス技術

    東北大学工学セミナー (兼 電子情報通信学会東北大支部学術講演会)  2015 

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  • 広帯域GaN低雑音増幅器の一検討

    2015年 電子情報通信学会総合大会  2015 

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  • ヘテロジーニアスネットワークにおける干渉アラインメントのための小型基地局クラスタ化処理の複雑さ軽減に関する一検討

    電子情報通信学会無線通信システム研究会  2015 

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  • 400MHz-6GHz高線形GaN低雑音増幅器の一検討

    電子情報通信学会マイクロ波研究会  2015 

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  • A Riemannian optimization based filter designs for interference alignment in multi-user MIMO interference channels

    2015年 電子情報通信学会通信ソサイエティ大会  2015 

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  • [Technology Exhibit] Broadband spectrum sensing platform based on received waveform cross-correlation using distributed sensors

    電子情報通信学会ソフトウェア無線研究会  2014 

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  • [招待講演]ソフトウェア無線・コグニティブ無線技術の研究開発

    電子情報通信学会ソフトウェア無線研究会  2014 

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  • Broadband spectrum sensing platform based on received waveform cross-correlation using distributed sensors

    The 2014 Singapore-Japan International Workshop on Smart Wireless Communications, SmartCom 2014  2014 

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  • [依頼講演] 広帯域周波数センシング用無線プラットフォームの性能評価

    電子情報通信学会ソフトウェア無線研究会  2014 

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  • 社会インフラ(地下構造物)のセンシングデータ収集・伝送技術及び処理技術の研究開発

    SIP(戦略的イノベーション創造プログラム)「インフラ維持管理・更新・マネジメント技術」第1回シンポジウム  2014 

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  • ホワイトスペースにおける新たなブロードバンドアクセスの実現に向けた周波数高度利用技術の研究開発(1)

    電波資源拡大のための研究開発 第7回成果発表会  2014 

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  • アンテナを内蔵したミリ波無線モジュール

    2013年 電子情報通信学会総合大会  2013 

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  • 広帯域低雑音可変利得増幅器を用いたRFフロントエンドICの一検討

    電子情報通信学会マイクロ波研究会  2013 

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  • 伝搬チャネルの位相差制御技術を用いた近距離MIMO伝送の特性評価

    2013年 電子情報通信学会総合大会  2013 

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  • 近距離MIMO伝送への偏波多重適用による復号処理簡易化の検討

    2013年 電子情報通信学会総合大会  2013 

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  • 非接触高速転送システムにおけるコンテンツ配信方法の検討

    2013年 電子情報通信学会総合大会  2013 

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  • 指向性による空間分割を用いた近距離MIMO伝送に関する検討

    2013年 電子情報通信学会総合大会  2013 

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  • ユーザセントリックワイヤレスネットワークにおけるナイキストサンプリングと圧縮センシングを組合せたCombined圧縮技術の評価

    2013年 電子情報通信学会総合大会  2013 

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  • ユーザセントリックワイヤレスネットワークにおける圧縮センシングを用いた無線信号圧縮伝送の復調性能評価

    2013年 電子情報通信学会総合大会  2013 

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  • A new architecture for concurrent dual-band digital predistortion

    2013 Asia-Pacific Microwave Conference, APMC 2013  2013 

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  • Study on short-range MIMO transmission using interference cancellation by antenna directivities

    2013 Asia-Pacific Microwave Conference, APMC 2013  2013 

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  • A broad-band, low-noise, wide-dynamic-range SiGe frontend receiver IC for multi-band access points

    2013 Asia-Pacific Microwave Conference, APMC 2013  2013 

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  • 次世代ワイヤレスシステムの研究開発

    東北大学電気・情報系 研究開発実践論  2013 

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  • [技術展示] 広帯域周波数センシングを実現する無線プラットフォームの提案

    電子情報通信学会ソフトウェア無線研究会  2013 

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  • ソースフォロワを用いた周波数変換器高線形化の一検討

    2013年電子情報通信学会エレクトロニクスソサイエティ大会  2013 

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  • 広帯域センシング用無線プラットフォームの提案

    2013年 電子情報通信学会通信ソサイエティ大会  2013 

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  • Concept of and transceiver for a 60-GHz high-speed non-contact transmission system

    The 6th Global Symposium on Millimeter-Waves 2013, GSMM 2013  2013 

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  • 広帯域,低雑音,広ダイナミックレンジRFフロントエンドIC

    2013年 電子情報通信学会通信ソサイエティ大会  2013 

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  • 近距離MIMO簡易復号の広帯域特性実測

    2013年 電子情報通信学会通信ソサイエティ大会  2013 

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  • 近距離MIMO用低演算量MIMO信号分離回路の提案

    2013年 電子情報通信学会通信ソサイエティ大会  2013 

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  • 広帯域センシング用無線プラットフォームにおける波形データの相関を用いた協調センシング方式の一検討

    2013年 電子情報通信学会通信ソサイエティ大会  2013 

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  • アンテナ指向性による近距離MIMO伝送の実験評価

    2013年 電子情報通信学会通信ソサイエティ大会  2013 

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  • 近距離MIMO伝送のための伝搬チャネルの位相差制御手法におけるアンテナ指向性の影響

    2013年 電子情報通信学会通信ソサイエティ大会  2013 

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  • 広帯域低雑音可変利得増幅器の一検討

    2013年 電子情報通信学会総合大会  2013 

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  • ユーザセントリックワイヤレスネットワークにおけるシングルキャリア信号の2バンド同時増幅時のデジタルプリディストーション技術の性能評価

    2013年 電子情報通信学会総合大会  2013 

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  • ユーザセントリックワイヤレスホームネットワークの提案

    2012年 電子情報通信学会総合大会  2012 

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  • Sparse-matrix-based compressed sensing for spectrum sensing in Flexible Wireless System

    The 18th Asia-Pacific Conference on Communications, APCC 2012  2012 

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  • 1-bit compressed sensing with edge detection for compressed radio wave data transfer

    The 18th Asia-Pacific Conference on Communications, APCC 2012  2012 

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  • A dual-band simultaneous receiving mixer with independent and linear gain control

    2012 Asia-Pacific Microwave Conference, APMC 2012  2012 

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  • A method for controlling phase difference between propagation channels for short-range MIMO transmission

    2012 International Symposium on Antennas and Propagation (ISAP)  2012 

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  • [パネル討論] 学会・研究会の活性化に向けて

    電子情報通信学会ソフトウェア無線研究会  2012 

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  • フレキシブルワイヤレスシステムにおける複数バンド同時送信時のデジタルプリディストーション技術の検討

    電子情報通信学会ソフトウェア無線研究会  2012 

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  • 近距離MIMO伝送における伝搬チャネルの位相差制御技術の検討

    2012年 電子情報通信学会通信ソサイエティ大会  2012 

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  • 近距離MIMO用簡易受信復号における重み付け振幅位相偏差の影響

    2012年 電子情報通信学会通信ソサイエティ大会  2012 

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  • マルチバンド一括受信ミキサにおける3バンド受信の評価結果

    2012年 電子情報通信学会エレクトロニクスソサイエティ大会  2012 

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  • 電波データ圧縮伝送における平滑化エッジ検出を用いた1bit圧縮センシングの圧縮復元性能の一検討

    2012年 電子情報通信学会通信ソサイエティ大会  2012 

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  • Compressed sensing prototype for Flexible Wireless System

    2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP2012, Exhibition  2012 

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  • ユーザセントリックワイヤレスホームネットワークにおける変換利得を独立制御可能なマルチバンド一括受信ミキサMMICの一検討

    2012年 電子情報通信学会総合大会  2012 

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  • Compressed sensing prototype for Flexible Wireless System

    2012 IEEE 75th Vehicular Technology Conference, VTC2012-Spring  2012 

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  • Spectrum sensing for networked system using 1-bit compressed sensing with partial random circulant measurement matrices

    2012 IEEE 75th Vehicular Technology Conference, VTC2012-Spring  2012 

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  • [技術展示] ユーザセントリックワイヤレスネットワークにおける1ビット圧縮センシング技術と巡回ランダム行列による圧縮技術

    電子情報通信学会ソフトウェア無線研究会  2012 

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  • マイクロストリップアンテナを用いた近距離MIMOの簡易受信復号

    2012年 電子情報通信学会総合大会  2012 

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  • 壁内マルチパス環境下におけるミリ波近距離MIMO伝送の特性評価

    2012年 電子情報通信学会総合大会  2012 

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  • 高集積ミリ波無線モジュールを用いたミリ波小型無線装置

    2012年 電子情報通信学会総合大会  2012 

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  • Performance evaluation of structured compressed sensing using partial random circulant measurement matrices for flexible wireless system

    2012年 電子情報通信学会総合大会  2012 

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  • Signal separation and reconstruction method for simultaneously received multi-system signals in a unified wireless system

    The 2011 International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom'11)  2011 

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  • An Intuitive introduction to compressed sensing

    電子情報通信学会ソフトウェア無線研究会  2011 

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  • Processing burden reduction of a large-scale data compression by employing averaged compressed sensing

    電子情報通信学会ソフトウェア無線研究会  2011 

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  • マルチバンド一括受信ミキサMMICの一検討

    2011年 電子情報通信学会エレクトロニクスソサイエティ大会  2011 

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  • 圧縮センシングを用いたFSK信号の復元及び復調に関する実験結果

    2011年 電子情報通信学会通信ソサイエティ大会  2011 

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  • 1 bit compressed sensing using partial random circulant measurement matrix for Flexible Wireless System

    電子情報通信学会ソフトウェア無線研究会  2011 

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  • 60 GHz帯広帯域アップコンバータMMICおよび低損失実装手法の検討

    2011年 電子情報通信学会エレクトロニクスソサイエティ大会  2011 

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  • A simultaneous receiving multi-band mixer with independent gain control

    2011 Asia-Pacific Microwave Conference, APMC 2011  2011 

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  • ソフトウェア無線・コグニティブ無線技術

    次世代ワイヤレス通信技術講座  2011 

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  • [招待講演] フレキシブルワイヤレスシステムの研究開発-多様な無線システムを統合的に収容可能な将来の無線プラットフォーム-

    電子情報通信学会ソフトウェア無線研究会  2011 

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  • [技術展示] フレキシブルワイヤレスシステムにおける圧縮センシング技術

    電子情報通信学会ソフトウェア無線研究会  2011 

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  • Experimental results of spectrum sensing for a flexible wireless system using an averaged compressed sensing

    2011年 電子情報通信学会通信ソサイエティ大会  2011 

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  • ミリ波近距離MIMOシステムの高速データ信号伝送評価

    2011年 電子情報通信学会通信ソサイエティ大会  2011 

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  • [招待講演]フレキシブルワイヤレスシステムの研究開発-ユーザが自由に無線アクセス方式を選べるヘテロジニアスネットワーク-

    電子情報通信学会無線通信システム研究会  2011 

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  • [招待講演]フレキシブルワイヤレスシステムの研究開発-ユーザが自由に無線アクセス方式を選べるヘテロジニアスネットワーク-

    電子情報通信学会ソフトウェア無線研究会  2011 

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  • 変換利得を独立制御可能なマルチバンド同時受信ミクサの一検討

    2011年 電子情報通信学会総合大会  2011 

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  • Compressed sensing method for large-scale data autocorrelated-then-averaged measurement

    2011年 電子情報通信学会総合大会  2011 

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  • Flexible wireless system: unified wireless platform for a wide variety of wireless systems

    The 2011 International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom'11)  2011 

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  • 高集積準ミリ波帯フロンドエンドチップセット

    電子情報通信学会マイクロ波研究会  2011 

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  • フレキシブル・アクセスポイントとプロトコルフリー信号処理部からなるヘテロジニアスネットワークシステムの提案-Part3: 高精度受信のための信号処理技術-

    電子情報通信学会ソフトウェア無線研究会  2010 

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  • A compact K/Ka-band transceiver MMIC using GaAs 3D-MMIC technology

    Asia-Pacific Microwave Conference 2010, APMC 2010  2010 

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  • Expectations and future perspective for short range wireless communications

    電子情報通信学会短距離無線通信研究会  2010 

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  • フレキシブルな無線通信システムを実現する広帯域・高ダイナミックレンジ受信機構成の提案

    電子情報通信学会マイクロ波研究会  2010 

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  • 広帯域一括受信における信号分離法に関する一検討

    2010年 電子情報通信学会通信ソサイエティ大会  2010 

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  • 偏波共用アンテナによる近距離パラレル伝送

    2010年 電子情報通信学会通信ソサイエティ大会  2010 

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  • 近距離MIMO伝送における偏波共用アンテナ構成の検討

    電子情報通信学会アンテナ・伝播研究会  2010 

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  • Time-frequency domain weighted measurement matrix generation method for compressed sensing

    2010年 電子情報通信学会通信ソサイエティ大会  2010 

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  • Multi-layer coupled band-pass flter for 60 GHz LTCC system-on-package

    Asia-Pacific Microwave Conference 2010, APMC 2010  2010 

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  • Reception performance of Flexible Wireless System receiving multi-signals simultaneously

    The 2010 Software Defined Radio Technical Conference and Product Exposition, SDR 2010  2010 

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  • [技術展示] マルチバンド・マルチ信号一括受信を行うフレキシブルワイヤレスシステムの提案

    電子情報通信学会ソフトウェア無線研究会  2010 

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  • (Invited) Ultra compact RFICs using three-dimensional MMIC technology

    2010 IEEE MTT-S International Microwave Symposium, IMS 2010  2010 

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  • ブロードバンド受信における受信波形データ圧縮方法に関する一検討

    2010年 電子情報通信学会総合大会  2010 

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  • Proposal of a weighted matrix generation method for compressed sensing

    2010年 電子情報通信学会総合大会  2010 

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  • ミリ波超高速近距離パラレル伝送システム

    2010年 電子情報通信学会総合大会  2010 

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  • 広帯域一括受信における信号復元方法の窓幅に関する一検討

    2010年 電子情報通信学会総合大会  2010 

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  • 高集積準ミリ波帯フロントエンドの一検討

    2010年 電子情報通信学会総合大会  2010 

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  • 広域ユビキタスネットワークにおける基地局用アンテナ技術

    2010年 電子情報通信学会総合大会  2010 

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  • (Invited) Performance of ultra-high-speed short-range transmission

    The 24th Meetiong of the Wireless World Research Forum (WWRF24th meeting)  2010 

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  • アクティブバランを用いた3D-MMIC X帯バランス型逓倍器

    2010年 電子情報通信学会総合大会  2010 

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  • コグニティブ無線・ソフトウェア無線技術の研究開発動向

    ワイヤレス・テクノロジー・パーク 2010 (WTP 2010) 技術セミナー  2010 

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  • 準ミリ波帯フロントエンド回路高集積化の一検討

    電子情報通信学会マイクロ波研究会  2010 

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  • ソフトウェア無線・コグニティブ無線の実装・実用化の動向

    電子情報通信学会ソフトウェア無線研究会  2010 

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  • Combined Nyquist and compressed sampling method for the wireless multiband receiver

    電子情報通信学会ソフトウェア無線研究会  2010 

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  • フレキシブル・アクセスポイントとプロトコルフリー信号処理部からなるヘテロジニアスネットワークシステムの提案-Part2: 圧縮センシングを用いた無線環境伝送技術-

    電子情報通信学会ソフトウェア無線研究会  2010 

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  • フレキシブル・アクセスポイントとプロトコルフリー信号処理部からなるヘテロジニアスネットワークシステムの提案-Part1: システムアーキテクチャとRF回路技術-

    電子情報通信学会ソフトウェア無線研究会  2010 

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  • Ultra high speed short-range parallel transmission using millimeter-wave frequency band

    Asia-Pacific Microwave Conference 2009 (APMC 2009)  2009 

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  • ミリ波超高速近距離パラレル伝送の効果

    電子情報通信学会アンテナ・伝播研究会  2009 

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  • ソフトウェア無線・コグニティブ無線の研究動向

    日本学術会議 URSI-C小委員会, 第21期 第4回公開研究会  2009 

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  • [記念講演] ソフトウェア無線研究会のさらなる発展に向けて

    電子情報通信学会ソフトウェア無線研究会  2009 

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  • [技術展示] 多種多様な無線端末を収容するフレキシブルワイヤレスシステムの提案

    電子情報通信学会ソフトウェア無線研究会  2009 

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  • A conpact balanced mixer for wireless nomadic systems

    The 12th IEEE International Symposium on Wireless Personal Multimedia Communications, WPMC 2009  2009 

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  • Effectiveness of ultra high speed parallel transmission in near field using millimeter-wave frequency

    The Thailand-Japan MicroWave (TJMW) 2009  2009 

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  • マイクロストリップアンテナを用いたミリ波帯超高速近距離パラレル伝送

    2009年 電子情報通信学会通信ソサイエティ大会  2009 

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  • 高精度干渉検出機能を搭載したコグニティブ無線システムの性能評価

    2009年 電子情報通信学会通信ソサイエティ大会  2009 

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  • 小型準ミリ波帯バランスミキサMMIC

    2009年 電子情報通信学会エレクトロニクスソサイエティ大会  2009 

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  • 広帯域一括受信における位相変調信号の信号復元方法の一検討

    2009年 電子情報通信学会通信ソサイエティ大会  2009 

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  • センシング情報の信頼度に基づいた協調センシング方法の検討

    電子情報通信学会ソフトウェア無線研究会  2009 

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  • ミリ波帯超高速近距離パラレル伝送に関する検討

    2009年 電子情報通信学会総合大会  2009 

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  • 高速中継システム実現に向けた近距離パラレル伝送の検討

    2009年 電子情報通信学会総合大会  2009 

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  • 60-GHz microstrip antenna with stacked rings using multi-layer LTCC substrate

    The 3rd European Conference on Antennas and Propagation, EuCAP 2009  2009 

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  • 広帯域一括受信における雑音除去技術の一検討

    2009年 電子情報通信学会総合大会  2009 

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  • 準ミリ波帯小型・広帯域スイッチ機能増幅器

    2009年 電子情報通信学会エレクトロニクスソサイエティ大会  2009 

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  • A unified wireless platform architecture for a wide variety of wireless systems

    The 2009 Software Defined Radio Technical Conference and Product Exposition, SDR 2009  2009 

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  • Small size base station antenna using phase difference feed for narrowband ubiquitous communication

    IEEE MTT-S International Microwave Workshop on Wireless Sensing, Local Positioning, and RFID, IMWS 2009  2009 

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  • A Compact X-band balanced frequency doubler on GaAs pHEMT 3D MMIC

    The 2009 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT 2009)  2009 

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  • Prototype of a cognitive radio system with cooperative sensing and interference alerting (Invited Paper)

    The Third International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom 2008  2008 

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  • 自律適応型ネットワークにおけるリソース制御機能と連携したマルチリンク通信方式の性能評価

    電子情報通信学会ソフトウェア無線研究会  2008 

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  • 準ミリ波帯高集積送受信3D-MMIC

    2008年 電子情報通信学会総合大会  2008 

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  • コグニティブ無線における通信中に到来するプライマリ信号検出方法の一検討

    2008年 電子情報通信学会総合大会  2008 

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  • コグニティブ無線の視点から

    統合無線技術検討会  2008 

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  • コグニティブ無線における既知信号を利用した通信中に到来するプライマリ信号検出方法

    電子情報通信学会ソフトウェア無線研究会  2008 

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  • コグニティブ無線における波形整形技術を用いたプライマリ信号検出方法の一検討

    2008年 電子情報通信学会通信ソサイエティ大会  2008 

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  • A cooperative sensing technique with weighting based on distance between radio stations

    The 14th Asia-Pacific Conference on Communications, APCC2008  2008 

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  • 高精度センシング機能を搭載したコグニティブ無線システムの試作と評価

    2008年 電子情報通信学会通信ソサイエティ大会  2008 

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  • Performance evaluation of a cooperative sensing method for cognitive radio

    The 2008 Software Defined Radio Technical Conference and Product Exposition, SDR 2008  2008 

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  • Channel assignment and reallocation algorithms for cognitive radio systems

    The 14th Asia-Pacific Conference on Communications, APCC2008  2008 

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  • [技術展示] 高精度干渉検出・回避技術を搭載したコグニティブ無線システム

    電子情報通信学会ソフトウェア無線研究会  2008 

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  • (Invited) Highly integrated GaAs MMICs using three-dimensional MMIC technology

    2007 IEEE MTT-S International Microwave Symposium, IMS 2007, Workshops and Tutorials  2007 

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  • Miniaturized multilayer inductors on GaAs three-dimensional MMIC

    2007 Korea-Japna MicroWave Conference, KJMW 2007  2007 

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  • A highly integrated quasi-millimeter wave transmitter MMIC using 3D-MMIC technology

    2007 Asia-Pacific Microwave Conference, APMC 2007  2007 

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  • Broadband low noise amplifier with high linearity for software-defined radios

    The 2nd European Microwave Integrated Circuits Conference 2007, EuMIC 2007  2007 

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  • A highly integrated quasi-millimeter wave receiver chip using 3D-MMIC technology

    The 2nd European Microwave Integrated Circuits Conference 2007, EuMIC 2007  2007 

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  • Evaluation of multilink communication method collaborating with resource management function of an autonomous adaptive base station

    The 2007 Software Defined Radio Technical Conference and Product Exposition, SDR 2007  2007 

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  • [技術展示]自律適応型ネットワークシステムの研究開発

    電子情報通信学会ソフトウェア無線研究会  2007 

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  • 基地局リソース制御と連携したマルチリンク通信方法に関する一検討

    2007年 電子情報通信学会通信ソサイエティ大会  2007 

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  • Novel cooperative sensing technique for cognitive radio

    The 18th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2007  2007 

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  • 広帯域低雑音増幅器の高線形化に関する検討

    2007年 電子情報通信学会エレクトロニクスソサイエティ大会  2007 

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  • 「コグニティブ無線に適したチャネル割当て方法の検討

    2007年 電子情報通信学会通信ソサイエティ大会  2007 

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  • 準ミリ波帯高集積受信3D-MMIC

    2007年 電子情報通信学会エレクトロニクスソサイエティ大会  2007 

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  • 準ミリ波帯高集積送信3D-MMIC

    2007年 電子情報通信学会エレクトロニクスソサイエティ大会  2007 

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  • ソフトウェア無線・コグニティブ無線実現に向けた広帯域低雑音増幅器の高線形化に関する検討

    電子情報通信学会ソフトウェア無線研究会  2007 

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  • [特別講演]ソフトウェア無線・コグニティブ無線実現に向けた高周波デバイスの研究開発動向

    電子情報通信学会ソフトウェア無線研究会  2007 

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  • A highly integrated X-band frequency quadrupler MMIC using 3D-MMIC technology

    The 2007 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2007  2007 

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  • Millimeter-wave highly-integrated GaAs MMICs using 3D-MMIC technology

    Microwave Workshops and Exhibition 2007, MWE 2007  2007 

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  • 相関があるシャドウイングを考慮した無線局協調型センシングの検討

    2007年 電子情報通信学会総合大会  2007 

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  • 自律適応型基地局におけるハードウェアリソースと通信容量に関する一検討

    2007年 電子情報通信学会総合大会  2007 

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  • GaAs pHEMT MMICにおけるインバータ内蔵ステップアッテネータの一検討

    2007年 電子情報通信学会総合大会  2007 

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  • コグニティブ無線の準ミリ波帯FWAシステムへの適用検討と周波数利用評価

    2007年 電子情報通信学会総合大会  2007 

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  • An autonomous adaptive base station that supports multiple wireless network systems

    The 2nd IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2007, DySPAN 2007  2007 

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  • 3D-MMIC技術を用いた高集積X帯4逓倍MMIC

    2007年 電子情報通信学会総合大会  2007 

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  • [特別招待講演] 集積化RF-MEMSとその実装技術

    電子情報通信学会電子部品・材料研究会  2007 

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  • コグニティブ無線における無線局協調センシングの検討

    電子情報通信学会ソフトウェア無線研究会  2007 

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  • 複数の無線システムを用いた適応型サービス機能配分方式の性能評価

    2006年 電子情報通信学会総合大会  2006 

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  • Integrated RF-MEMS technology for multiband RFIC

    The 23rd Sensor Symposium on Sensors, Micromachines, and Applied Systems  2006 

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  • コグニティブ無線における無線局協調型空きチャネル検出法の検討

    2006年 電子情報通信学会通信ソサイエティ大会  2006 

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  • Evaluation of a resource management method for an autonomous adaptive base station

    The 2006 Software Defined Radio Technical Conference and Product Exposition, SDR 2006  2006 

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  • 集積化RF-MEMSとその実装技術

    社団法人エレクトロニクス実装学会, 超高速高周波エレクトロニクス実装研究会, 平成18年度第1回公開研究会  2006 

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  • A dual-band VCO integrated with RF-MEMS switches and inductors

    The 36th European Microwave Conference  2006 

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  • [技術展示] RF-MEMS一体化デュアルバンドVCO

    電子情報通信学会ソフトウェア無線研究会  2006 

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  • 自律適応制御技術を用いた無線基地局の試作と性能評価

    2006年 電子情報通信学会通信ソサイエティ大会  2006 

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  • MIMO-OFDMに適した増幅器の適応的歪み補償方法の一検討

    2006年 電子情報通信学会通信ソサイエティ大会  2006 

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  • (Invited) Trends in broadband wireless communication systems and software defined radios

    2006 Sendai International Workshop on Network Security and Wireless Communications  2006 

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  • フリップチップ実装によるRF-MEMS一体化VCO

    2006年 電子情報通信学会総合大会  2006 

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  • Performance evaluation of reconfigurable processor for SDR mobile terminals and SDR base station using autonomous adaptive control technology

    The 5th International Conference on Information, Communications and Signal Processing, ICICS 2005  2005 

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  • 自律適応型ネットワーク構成エージェント技術

    ユビキタスネットワークシンポジウム2005 (UNS2005)  2005 

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  • A Study on security architecture for software defined radio

    IEICE Symposium on Download Security and Regulatory Issues  2003 

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  • ハードウェアとソフトウェア―文学的思考の必然性―

    フェリス女学院大学文学部日本文学科共通プレゼン実習ミニ講演会  2003 

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  • Performance of IEEE 802.11 wireless LAN implemented on software defined radio with hybrid programmable architecture

    IEEE International Conference on Communications (ICC2003)  2003 

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  • Evaluation of inter-code interference on uplink MC-CDMA

    2003年 電子情報通信学会通信ソサイエティ大会  2003 

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  • Proposal and evaluation of security schemes for software-defined radio

    The 14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC2003  2003 

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  • 広帯域移動アクセスシステムにおけるチャネル割当方法に関する一検討

    2003年 電子情報通信学会総合大会  2003 

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  • 周波数領域拡散MC-CDMAのアップリンクにおける多元接続干渉の定量的評価

    2003年 電子情報通信学会総合大会  2003 

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  • Performance evaluation and comparison of OFDM systems using spectrum spreading

    The 6th IEEE International Symposium on Wireless Personal Multimedia Communications, WPMC'03  2003 

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  • 通信路状態に応じてコード多重数を可変にするOFDM/ACDM方式の提案

    電子情報通信学会無線通信システム研究会  2002 

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  • Design and performance evaluation of software defined radio prototype for PHS and IEEE802.11 wireless LAN

    The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC2002  2002 

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  • 通信路状態に応じてコード多重数を可変にするMC-CDM方式の提案と評価

    2002年 電子情報通信学会通信ソサイエティ大会  2002 

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  • Evaluation of software defined radio prototype for PHS and wireless LAN

    2002 Software Defined Radio Technical Conference, SDR02  2002 

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  • System re-configuration and over-the-air download functions of the software radio prototype supporting PHS and wireless LAN

    2002 IEEE 56th Vehicular Technology Conference, VTC2002-Fall  2002 

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  • (招待講演) 移動通信用SDRの研究開発

    第45回移動体通信研究会  2002 

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  • ソフトウェア無線用におけるセキュリティ・アーキテクチャの一検討

    2002年 電子情報通信学会通信ソサイエティ大会  2002 

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  • ソフトウェア無線技術の移動通信等への応用と周波数資源開発の在り方

    周波数資源開発シンポジム2002  2002 

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  • PHSと無線LANに対応できるソフトウェア無線機における信号処理(II)―PHSを実現する信号処理と制御,及び,無線ダウンロードプロトコル―

    2002年 電子情報通信学会総合大会  2002 

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  • 基地局周辺散乱リングモデルにおけるフラットフェージング特性の一検討

    2002年 電子情報通信学会総合大会  2002 

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  • Proposal and evaluation of system diversity for software defined radio

    IEEE International Conference on Communications (ICC2002)  2002 

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  • PHSと無線LANに対応できるソフトウェア無線機における信号処理(III)―IEEE802.11無線LANを実現する信号処理と制御―

    2002年 電子情報通信学会総合大会  2002 

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  • [招待論文]ソフトウェア無線技術の動向

    電子情報通信学会VLSI設計技術研究会  2001 

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  • Design and evaluation of software radio prototype with over-the-air download function

    IEEE 54th Vehicular Technology Conference Fall 2001, VTC Fall 2001  2001 

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  • PHS方式と無線LANに対応したソフトウェア無線機の試作(I)─システム設計と無線ダウンロード─

    電子情報通信学会ソフトウェア無線研究会  2001 

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  • Subjects and its solutions for the technical regulation conformity certification of software radio

    8th IEICE Workshop on Software Radio  2001 

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  • Present and future of the software defined radio

    2001 Microwave Workshops and Exhibition (MWE'01)  2001 

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  • PHS方式と無線LANに対応したソフトウェア無線機の試作(II)─無線LANモード─

    電子情報通信学会ソフトウェア無線研究会  2001 

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  • ソフトウェア無線のハードウェアリソースを考慮した方式ダイバーシチに関する一検討

    2001年 電子情報通信学会総合大会  2001 

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  • ソフトウェア無線機における無線ダウンロード機能の性能評価

    2001年 電子情報通信学会総合大会  2001 

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  • マルチプロセッサ・アーキテクチャ・ソフトウェア無線機におけるPHS方式ソフトウェアの設計と特性

    電子情報通信学会ソフトウェア無線研究会  2001 

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  • [招待論文]ソフトウェア無線の研究開発動向

    電子情報通信学会第14回回路とシステム(軽井沢)ワークショップ  2001 

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  • Proposal and evaluation of system diversity technology for software defined radio

    2001 Asia-Pacific Radio Science Conference, AP-RASC'01  2001 

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  • ハードウェア構成技術の考察に基づくセルラ/無線LAN共用ソフトウェア無線装置の試作

    電子情報通信学会ソフトウェア無線研究会  2001 

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  • ソフトウェア無線用PHS方式ソフトウェアの設計及び性能評価

    2001年 電子情報通信学会通信ソサイエティ大会  2001 

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  • FR-PPPを用いたセルラ/無線LAN共用ソフトウェア無線機の構成法[I]

    2001年 電子情報通信学会通信ソサイエティ大会  2001 

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  • Design and evaluation of software radio program on multiprocessor architecture platform for full-duplex real-time communication

    The 12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2001  2001 

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  • ソフトウェア無線を用いたシームレスシステム間ハンドオーバにおけるチャネル容量増大効果

    2001年 電子情報通信学会通信ソサイエティ大会  2001 

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  • Software radio base and personal stations for cellular/PCS systems

    2000 IEEE 51st Vehicular Technology Conference, VTC2000-Spring  2000 

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  • ワイヤレスAO/DIシステムの性能評価

    電子情報通信学会無線通信システム研究会  2000 

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  • Common carrier activities in the SDR : Prototype implementation of SDR systems

    SDR Forum 19th General Meeting  2000 

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  • 多目的利用におけるDSRCシームレス通信技術の検討

    電子情報通信学会高度交通システム研究会  2000 

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  • ソフトウェア無線の研究開発(予稿なし)

    第58回テラヘルツ工学研究会  2000 

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  • Design of software radio for cellular communication systems and wireless LANs

    The 11th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2000  2000 

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  • SDR application for the next generation wireless access -Prototype implementation-

    The 12th Tyrrhenian International Workshop on Digital Communications  2000 

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  • ブロック暗号Twofishの安全性について

    電子情報通信学会情報セキュリティ研究会  2000 

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  • Flexible security systems and the new construction of electric commerce on the software radio

    IEEE 52nd Vehicular Technology Conference Fall 2000, VTC2000 Fall  2000 

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  • 方式ダイバーシチにおけるシステム間ハンドオーバに関する一検討

    2000年 電子情報通信学会通信ソサイエティ大会  2000 

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  • 新しい厳密評価手法を用いたブロック暗号Twofishの安全性評価結果

    2000年 電子情報通信学会基礎・境界ソサイエティ大会  2000 

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  • ミリ波帯高速ワイヤレスアクセスシステムと高周波回路技術

    電気学会ミリ波技術とそのインテグレイションと展望調査専門委員会第1回ミリ波ワークショップ  2000 

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  • ソフトウェア無線基地局・端末局の試作と評価

    電子情報通信学会DSPディジタル信号処研究会  2000 

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  • ソフトウェア無線における無線ダウンロードに関する一検討

    2000年 電子情報通信学会総合大会  2000 

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  • Truncated Differential Cryptanalysisに耐性をもつブロック暗号の構成法

    2000年 電子情報通信学会総合大会  2000 

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  • 非対称ワイヤレスネットワーク構成法の提案

    2000年 電子情報通信学会総合大会  2000 

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  • ソフトウェア無線を用いた方式ダイバーシチに関する一検討

    2000年 電子情報通信学会総合大会  2000 

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  • Relationships among differential, truncated differential, impossible differential cryptanalysis against block-oriented block ciphers like RIJNDAEL, E2

    The Third Advanced Encryption Standard Candidate Conference (AES)  2000 

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  • Common carrier activities in SDR : Prototype implementation of SDR systems

    The 2nd SDR Workshop -Joint SDR Workshop and Forum-  2000 

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  • ソフトウェア無線におけるフレキシブルなセキュリティシステムと電子商取引システムの構成法

    電子情報通信学会ソフトウェア無線研究会  2000 

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  • ソフトウェア無線における無線ダウンロード方法の一検討

    電子情報通信学会ソフトウェア無線研究会  2000 

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  • 拡張型E2-Like Transformationとそのs-boxの安全性について

    電子情報通信学会2000年暗号と情報セキュリティシンポジウム  2000 

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  • ソフトウェア無線用汎用型無線ダウンロード方法に関する検討

    2000年 電子情報通信学会通信ソサイエティ大会  2000 

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  • ソフトウェア無線技術を用いた宅内ゲートウェイの一検討

    2000年 電子情報通信学会通信ソサイエティ大会  2000 

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  • ソフトウェア無線における特性補償信号処理に関する一検討

    2000年 電子情報通信学会通信ソサイエティ大会  2000 

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  • ソフトウェア無線試作機の特性評価

    2000年 電子情報通信学会通信ソサイエティ大会  2000 

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  • マルチセル構成におけるSDMA容量増加の評価

    2000年 電子情報通信学会通信ソサイエティ大会  2000 

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  • A study on an over-the-air download scheme for software radios

    The 7th International Workshop on Mobile Multimedia Communications (MoMuC)  2000 

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  • ソフトウェア無線による無線LANモード実現の一検討

    電子情報通信学会ソフトウェア無線研究会  2000 

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  • Software defined radio prototypes for multimode operation

    The Third International Symposium on Wireless Personal Multimedia Communications, WPMC-2000  2000 

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  • ソフトウェア無線方式を用いたワイヤレスサービスの検討

    1999年 電子情報通信学会通信ソサイエティ大会  1999 

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  • ソフトウェア無線を用いた方式ダイバーシチに関する検討

    電子情報通信学会ソフトウェア無線研究会  1999 

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  • ソフトウェア無線基地局・端末局の試作─(II)機能─

    1999年 電子情報通信学会通信ソサイエティ大会  1999 

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  • ソフトウェア無線基地局・端末局の試作─(I)構成─

    1999年 電子情報通信学会通信ソサイエティ大会  1999 

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  • ソフトウェア無線方式におけるセキュリティ技術

    1999年 電子情報通信学会通信ソサイエティ大会  1999 

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  • ソフトウェア無線方式におけるアンテナ・RFインタフェース条件

    1999年 電子情報通信学会通信ソサイエティ大会  1999 

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  • AO/DI対応ワイヤレスTAの性能評価

    1999年 電子情報通信学会通信ソサイエティ大会  1999 

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  • ソフトウェア無線を用いた方式ダイバーシチの提案

    1999年 電子情報通信学会通信ソサイエティ大会  1999 

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  • ソフトウェア無線基地局・端末局の試作(I)

    電子情報通信学会ソフトウェア無線研究会  1999 

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  • 拡張型E2-Like Transformationの安全性について

    電子情報通信学会情報セキュリティ研究会  1999 

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  • ブロック暗号E2の最大平均差分確率について

    1999年 電子情報通信学会基礎・境界ソサイエティ大会  1999 

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  • ATMワイヤレスアクセスに適したセクタアンテナ構成法

    電子情報通信学会アンテナ・伝播研究会  1998 

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  • 屋内高速無線通信における最適チルト角の一検討

    1998年 電子情報通信学会総合大会  1998 

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  • ATMワイヤレスアクセス端末用6セクタアンテナ

    1998年 電子情報通信学会総合大会  1998 

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  • FDTDを用いたマルチセクタ・モノポール・八木・宇田アンテナの放射機構の過渡解に対する厳密解析

    1998年 電子情報通信学会総合大会  1998 

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  • ATMワイヤレスアクセス端末用小形6セクタアンテナ

    1998年 電子情報通信学会総合大会  1998 

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  • ATMワイヤレスアクセス端末用ロッド型小形6セクタアンテナ

    1998年 電子情報通信学会総合大会  1998 

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  • Miniaturization of base station antennas by using adaptive antenna technique for indoor high-speed wireless communication systems

    48th IEEE Vehicular Technology Conference  1998 

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  • ATMワイヤレスアクセス端末用6角柱形状6セクタアンテナ

    1998年 電子情報通信学会総合大会  1998 

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  • Time domain analysis of small multi-sector monopole Yagi-Uda array antenna mounted on a finite ground plane using FDTD method

    14th Annual Review of Progress in Applied Computational Electromagnetics (ACES '98) Conference  1998 

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  • Rigorous analysis of transient radiation mechanism of small multi-sector monopole Yagi-Uda array antenna using FDTD method

    Progress in Electromagnetics Research Symposium (PIERS)  1998 

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  • 任意ビーム幅モノポール八木・宇田アレーによる薄型マルチセクタアンテナとその金型成形製造法による特性

    電子情報通信学会アンテナ・伝播研究会  1997 

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  • 高速無線通信用ロッド型セクタアンテナ

    1997年 電子情報通信学会総合大会  1997 

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  • セクタ化モノポール八木・宇田アンテナの地板影響に対する電流分布解析設

    1997年 電子情報通信学会総合大会  1997 

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  • Null成形ビームによる屋内高速通信品質改善の検討

    1997年 電子情報通信学会総合大会  1997 

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  • A novel beam combination method for indoor high-speed wireless communication systems

    IEEE 47th Vehicular Technology Conference  1997 

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  • 屋内高速無線通信システムへのアダプティブアレー適用の効果

    1997年 電子情報通信学会総合大会  1997 

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  • 屋内多重波伝搬環境におけるアダプティブアレーの垂直面制御法の検討

    電子情報通信学会アンテナ・伝播研究会  1997 

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  • 高速無線通信用ロッド型セクタアンテナの提案

    電子情報通信学会アンテナ・伝播研究会  1997 

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  • アダプティブアレーを用いたWireless LANにおける場所率簡易推定法

    電子情報通信学会アンテナ・伝播研究会  1997 

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  • Technology of antennas for high speed wireless access

    MWE '97 Microwave Workshop  1997 

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  • Null成形ビームによるダイバーシティの検討

    1997年 電子情報通信学会通信ソサイエティ大会  1997 

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  • Broadband wireless access system antennas: concepts and designs

    9th Tyrrhenian International Workshop on Digital Communication (TIWDC)  1997 

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  • 屋内多重波環境でのアダプティブアレーの素子数決定法について

    1997年 電子情報通信学会通信ソサイエティ大会  1997 

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  • 任意ビーム幅モノポール八木宇田アレーによる薄型マルチセクタアンテナ

    1997年 電子情報通信学会通信ソサイエティ大会  1997 

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  • R&D on Antennas and Propagation for Wireless LAN and Wireless ATM Systems

    Microwave Millimeter-Wave and RF Seminar  1997 

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  • 高速ワイヤレスアクセス端末用6セクタアンテナ

    1997年 電子情報通信学会通信ソサイエティ大会  1997 

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  • A three-dimensional active antenna for a high-speed wireless communication application

    1997 IEEE MTT-S International Microwave Symposium  1997 

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  • Antenna concept and design for advanced wireless access systems

    International Wireless and Telecommunications Symposium/Exhibition (IWTS '97)  1997 

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  • A planar sector antenna for indoor high-speed wireless communication terminals

    IEEE Antennas and Propagation Society International Symposium  1997 

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  • 金属フィン付コーナリフレクタアンテナを用いた小型12セクタアンテナの設計と解析

    電子情報通信学会アンテナ・伝播研究会  1997 

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  • A miniaturized dual polarization antenna for a small wireless terminal

    IEEE Antennas and Propagation Society International Symposium  1996 

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  • Investigation and design of wireless access system antennas

    1996 International Symposium on Antennas and Propagation (ISAP)  1996 

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  • A crossed fan-beam method for wide-band digital indoor communication systems (invited)

    1996 International Symposium on Antennas and Propagation (ISAP)  1996 

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  • 屋内多重波伝搬環境におけるアダプティブアレーの動作の考察

    電子情報通信学会アンテナ・伝播研究会  1996 

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  • Rigorous analysis of a multi-sector monopole Yagi-Uda antenna with metallic fins

    1996 International Symposium on Antennas and Propagation (ISAP)  1996 

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  • 20GHz帯円柱フェーズドアレーアンテナの移相量子化の影響

    1996年 電子情報通信学会通信ソサイエティ大会  1996 

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  • 高速無線通信端末局用平面型セクタアンテナの提案

    1996年 電子情報通信学会通信ソサイエティ大会  1996 

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  • 30-GHz multibeam antenna using bi-layer Butler matrix circuits

    1996 International Symposium on Antennas and Propagation (ISAP)  1996 

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  • 反射型副アンテナによるシャドーイング対策の一検討

    1996年 電子情報通信学会通信ソサイエティ大会  1996 

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  • 有限地板上に設置された金属フィン付きセクター化モノポール八木アレーの解析

    1996年 電子情報通信学会総合大会  1996 

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  • 屋内高速無線通信に適したビーム方式

    1996年 電子情報通信学会総合大会  1996 

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  • 平面マルチビームアレーアンテナを用いた20GHz帯12セクタアンテナ

    1996年 電子情報通信学会総合大会  1996 

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  • 空間ダイバーシチが可能なセクタホーンアンテナ

    1996年 電子情報通信学会総合大会  1996 

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  • Analysis and design of multi-sector monopole Yagi-Uda array mounted on a ground plane using moment method

    3rd International Conference on Computation in Electromagnetics (CEM '96)  1996 

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  • 電磁波整合回路における過渡現象の解析

    1996年 電子情報通信学会総合大会  1996 

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  • マルチセクタモノポール八木アレーアンテナの設計

    1996年 電子情報通信学会通信ソサイエティ大会  1996 

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  • 地板付きモノポール八木アレーの設計と解析

    1995年 電子情報通信学会通信ソサイエティ大会  1995 

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  • セクタ化モノポール八木アレーアンテナの解析

    電子情報通信学会アンテナ・伝播研究会  1995 

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  • 二層構造バトラーマトリクスを用いたマルチビームアンテナ響

    1995年 電子情報通信学会通信ソサイエティ大会  1995 

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  • 平面二層構造バトラーマトリクスの一構成法

    1995年 電子情報通信学会総合大会  1995 

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  • 屋内伝搬遅延特性におけるアンテナサイドローブの影響

    1995年 電子情報通信学会総合大会  1995 

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  • 屋内伝搬遅延特性におけるアレーアンテナ指向性の影響

    1995年 電子情報通信学会通信ソサイエティ大会  1995 

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  • New indoor high-speed radio communication system

    IEEE 45th Vehicular Technology Conference  1995 

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  • 屋内高速無線通信に必要なアンテナ指向性の定量化

    1994年電子情報通信学会秋季大会  1994 

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  • 幾何光学的屋内伝搬解析アルゴリズム

    電子情報通信学会アンテナ・伝播研究会  1994 

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  • 送受信アンテナ指向性を考慮した屋内伝搬特性の解析法

    1994年電子情報通信学会春季大会  1994 

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  • New indoor high-speed radio communication system

    1994 Asia-Pacific Microwave Conference  1994 

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  • 位相差を有する複数励振源に対するFDTDアルゴリズムの提案とアレーアンテナ解析への応用

    1993年電子情報通信学会秋季大会  1993 

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  • FDTD法を用いたマイクロストリップアンテナの相互結合の解析

    1993年電子情報通信学会春季大会  1993 

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  • ミリ波帯準光学的ミキサーアレイ

    第354回伝送工学研究会  1991 

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  • ミリ波帯イメージングアレイの開発及びそのプラズマ計測への応用

    ミリ波デバイスと半導体プロセス技術研究会  1991 

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  • Imagign arrays for the millimeter- and submillimeter-wave region

    Second International Symposium on Space Terahertz Technology  1991 

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  • ミリ波帯イメージングアレイ用光学系の設計とプラズマ計測への適用

    電子情報通信学会マイクロ波研究会  1991 

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  • ミリ波帯イメージングアレイ用八木・宇田アンテナの最適設計

    電子情報通信学会マイクロ波研究会  1991 

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  • ミリ波帯イメージングアレイ用正方形パッチアンテナ

    1990年電子情報通信学会春季全国大会  1990 

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  • Millimeter-wave Yagi-Uda antenna imaging arrays

    The 3rd Asia-Pacific Microwave Conference  1990 

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  • ミリ波帯イメージングアレイの研究

    第341回伝送工学研究会  1990 

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  • ミリ波位相イメージ法のガンマ10プラグ部プラズマへの適用

    プラズマ・核融合学会第7回秋季講演会  1990 

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  • ミリ波帯パッチアンテナイメージングアレイの研究

    第343回伝送工学研究会  1990 

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  • ミリ波帯八木・宇田アンテナ型イメージングアレイ

    1990年電子情報通信学会春季全国大会  1990 

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  • ミリ波帯イメージング用検出器アンテナ・アレイ

    第333回伝送工学研究会  1989 

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  • ガンマ10におけるミリ波位相イメージ法測定

    第6回プラズマ・核融合学会秋季講演会シンポジウム  1989 

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  • ミリ波帯イメージング用八木宇田アンテナ・アレイ

    1988年電子情報通信学会春季全国大会  1988 

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  • ミリ波帯イメージング用検出器アンテナ・アレイ

    第325回伝送工学研究会  1988 

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  • Millimeter wave imaging antenna arrays

    2nd Asia-Pacific Microwave Conference  1988 

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  • ミリ波、サブミリ波帯高感度検出器及び検出器アレイ

    電気学会調査専門委員会  1988 

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  • 誘電体基板を用いたミリ波帯イメージング用検出器アレイ

    応用物理学会東北支部第43回学術講演会  1988 

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  • Detector antenna array with a dielectric lens for millimeter-wave imaging

    13'th International Conference on Infrared and Milli-meter Waves  1988 

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  • ミリ波位相イメージ法のガンマ10プラズマへの適用

    第5回プラズマ・核融合学会年会  1988 

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  • 誘電体基板を用いたミリ波帯イメージング用検出器アレイ

    電気関係学会東北支部連合大会  1988 

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Industrial property rights

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    Announcement no:特開2014-011577  Date announced:2014.1.20

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    Application no:特願2012-141923  Date applied:2012.6.25

    Announcement no:特開2014-007569  Date announced:2014.1.16

    Patent/Registration no:特許5759422  Date registered:2015.6.12 

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  • 送信機、及び歪み補償方法

    山田貴之, 加保貴奈, 山口陽, 赤羽和徳, 上原一浩, 荒木純道, タンザカン

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    Application no:特願2012-138708  Date applied:2012.6.20

    Announcement no:特開2014-003527  Date announced:2014.1.9

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  • 可変利得増幅器、及び増幅回路

    山口陽, 加保貴奈, 赤羽和徳, 上原一浩

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    Application no:特願2012-107849  Date applied:2012.5.9

    Announcement no:特開2013-236271  Date announced:2013.11.21

    Patent/Registration no:特許5485332  Date registered:2014.2.28 

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  • 受信システム

    加保貴奈, 山田貴之, 山口陽, 芝宏礼, 赤羽和徳, 李斗煥, 上原一浩

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    Application no:特願2011-241361  Date applied:2011.11.2

    Announcement no:特開2013-098854  Date announced:2013.5.20

    Patent/Registration no:特許5650625  Date registered:2014.11.21 

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  • 信号処理システム及び信号処理方法

    李斗煥, 山田貴之, 赤羽和徳, 山口陽, 上原一浩

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    Application no:特願2011-233984  Date applied:2011.10.25

    Announcement no:特開2013-093707  Date announced:2013.5.16

    Patent/Registration no:特許5670860  Date registered:2014.12.26 

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  • 信号処理システム及び信号処理方法

    李斗煥, 山田貴之, 赤羽和徳, 山口陽, 上原一浩

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    Application no:特願2011-228059  Date applied:2011.10.17

    Announcement no:特開2013-090097  Date announced:2013.5.13

    Patent/Registration no:特許5681609  Date registered:2015.1.16 

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  • 信号処理システム及び信号処理方法

    李斗煥, 山田貴之, 芝宏礼, 上原一浩

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    Application no:特願2011-157871  Date applied:2011.7.19

    Announcement no:特開2013-165357  Date announced:2012.8.30

    Patent/Registration no:特許5559752  Date registered:2014.6.13 

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  • 受信システム

    加保貴奈, 上原一浩, 芝宏礼, 赤羽和徳, 山口陽, 山田貴之, 李斗煥

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    Application no:特願2011-156598  Date applied:2011.7.15

    Announcement no:特開2013-026663  Date announced:2013.2.4

    Patent/Registration no:特許5555208  Date registered:2014.6.6 

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  • 送信機及び送受信機

    加保貴奈, 山田貴之, 山口陽, 芝宏礼, 上原一浩, 荒木純道

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    Application no:特願2011-096247  Date applied:2011.4.22

    Announcement no:特開2012-227881  Date announced:2012.11.15

    Patent/Registration no:特許5679193  Date registered:2015.1.16 

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  • 無線通信装置およびビーム制御方法

    芝宏礼, 豊田一彦, 上原一浩

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    Application no:特願2011-065816  Date applied:2011.3.24

    Announcement no:特開2012-204955  Date announced:2012.10.22

    Patent/Registration no:特許5372055  Date registered:2013.9.27 

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  • 受信方法、及び受信装置

    山田貴之, 芝宏礼, 李斗煥, 山口陽, 上原一浩

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    Application no:特願2011-035013  Date applied:2011.2.21

    Announcement no:特開2012-175371  Date announced:2012.9.10

    Patent/Registration no:特許5394420  Date registered:2013.10.25 

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  • 信号処理システム及び信号処理方法

    李斗煥, 山田貴之, 芝宏礼, 上原一浩

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    Application no:特願2011-007764  Date applied:2011.1.18

    Announcement no:特開2013-165357  Date announced:2012.8.30

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  • Receiver

    Takana Kaho, Yo Yamaguchi, Hiroyuki Shiba, Doohwan Lee, Takayuki Yamada, Kazunori Akabane, Kazuhiro Uehara

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    Application no:13/520268  Date applied:2011.1.12

    Patent/Registration no:9136893  Date registered:2015.9.15 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Multiband receiver

    Takana Kaho, Yo Yamaguchi, Hiroyuki Shiba, Doohwan Lee, Takayuki Yamada, Kazunori Akabane, Kazuhiro Uehara

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    Application no:201180005345.0  Date applied:2011.1.12

    Patent/Registration no:ZL201180005345.0  Date registered:2015.4.22 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Multiband receiver

    Takana Kaho, Yo Yamaguchi, Hiroyuki Shiba, Doohwan Lee, Takayuki Yamada, Kazunori Akabane, Kazuhiro Uehara

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    Application no:11732886.4  Date applied:2011.1.12

    Patent/Registration no:2525500  Date registered:2014.12.17 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Multiband receiver

    Takana Kaho, Yo Yamaguchi, Hiroyuki Shiba, Doohwan Lee, Takayuki Yamada, Kazunori Akabane, Kazuhiro Uehara

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    Application no:11732886.4  Date applied:2011.1.12

    Patent/Registration no:2525500  Date registered:2014.12.17 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • 受信機

    加保貴奈, 山口陽, 芝宏礼, 李斗煥, 山田貴之, 赤羽和徳, 上原一浩

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    Application no:特願2011-549986  Date applied:2011.1.12

    Announcement no:再表2011/087016  Date announced:2011.7.21

    Patent/Registration no:特許5425227  Date registered:2013.12.6 

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  • 無線通信システム

    平賀健, 関智弘, 西川健二郎, 上原一浩

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    Application no:特願2010-181626  Date applied:2010.8.16

    Announcement no:特開2012-044298  Date announced:2012.3.1

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  • 信号処理システム及び信号処理方法

    李斗煥, 芝宏礼, 山田貴之, 上原一浩

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    Application no:特願2010-180257  Date applied:2010.8.11

    Announcement no:特開2011-193431  Date announced:2011.9.29

    Patent/Registration no:特許5419825  Date registered:2013.11.29 

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  • 利得制御方法及び装置

    芝宏礼, 山口陽, 加保貴奈, 上原一浩

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    Application no:特願2010-134876  Date applied:2010.6.14

    Announcement no:特開2012-004622  Date announced:2012.1.5

    Patent/Registration no:特許5355503  Date registered:2013.9.6 

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  • 情報圧縮装置、情報圧縮方法

    千葉宇弘, 芝宏礼, 山田貴之, 李斗煥, 山口陽, 上原一浩

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    Application no:特願2010-037324  Date applied:2010.2.23

    Announcement no:特開2011-176429  Date announced:2011.9.8

    Patent/Registration no:特許5306259  Date registered:2013.7.5 

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  • 信号処理システム及び信号処理方法

    李斗煥, 芝宏礼, 山田貴之, 上原一浩

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    Application no:特願2010-036421  Date applied:2010.2.22

    Announcement no:特開2011-193431  Date announced:2011.9.29

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  • 受信機

    加保貴奈, 山口陽, 芝宏礼, 李斗煥, 山田貴之, 赤羽和徳, 上原一浩

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    Application no:特願2010-004325  Date applied:2010.1.12

    Announcement no:再表2011/087016  Date announced:2011.7.21

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  • フィルタ装置及びフィルタ方法

    加保貴奈, 山口陽, 芝宏礼, 李斗煥, 山田貴之, 赤羽和徳, 上原一浩

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    Application no:特願2010-004328  Date applied:2010.1.12

    Announcement no:特開2011-146812  Date announced:2011.7.28

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  • 受信機及び送受信機

    加保貴奈, 山口陽, 芝宏礼, 李斗煥, 山田貴之, 赤羽和徳, 上原一浩

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    Application no:特願2010-004326  Date applied:2010.1.12

    Announcement no:特開2011-146810  Date announced:2011.7.28

    Patent/Registration no:特許5309368  Date registered:2013.7.12 

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  • 信号処理装置、及びそれを用いた受信システム、並びに信号処理方法

    李斗煥, 芝宏礼, 山田貴之, 赤羽和徳, 加保貴奈, 山口陽, 上原一浩

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    Application no:特願2010-004330  Date applied:2010.1.12

    Announcement no:特開2011-146814  Date announced:2011.7.28

    Patent/Registration no:特許5089712  Date registered:2012.9.21 

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  • 信号送信装置、信号処理装置、信号送信システム、信号送信方法及び信号生成方法

    加保貴奈, 山口陽, 芝宏礼, 李斗煥, 山田貴之, 赤羽和徳, 上原一浩

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    Application no:特願2010-004327  Date applied:2010.1.12

    Announcement no:特開2011-146811  Date announced:2011.7.28

    Patent/Registration no:特許5159802  Date registered:2012.12.21 

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  • 信号処理装置、及びそれを用いた受信システム、並びに信号処理方法

    李斗煥, 芝宏礼, 山田貴之, 赤羽和徳, 加保貴奈, 山口陽, 上原一浩

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    Application no:特願2010-004329  Date applied:2010.1.12

    Announcement no:特開2011-146813  Date announced:2011.7.28

    Patent/Registration no:特許5185299  Date registered:2013.1.25 

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  • セクタアンテナ装置

    関智弘, 平賀健, 西川健二郎, 上原一浩

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    Application no:特願2009-215777  Date applied:2009.9.17

    Announcement no:特開2011-066697  Date announced:2013.3.1

    Patent/Registration no:特許5208077  Date registered:2013.3.1 

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  • 受信装置および受信信号の等化方法

    山田貴之, 芝宏礼, 赤羽和徳, 上原一浩

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    Application no:特願2009-136326  Date applied:2009.6.5

    Announcement no:特開2010-283667  Date announced:2010.12.16

    Patent/Registration no:特許5213799  Date registered:2013.3.8 

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  • 光回線終端装置、故障箇所検出装置、通信経路切替方法、及び故障箇所検出方法

    芝宏礼, 上原一浩, 木村秀明

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    Application no:特願2009-127642  Date applied:2009.5.27

    Announcement no:特開2010-278620  Date announced:2010.12.9

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  • 復調装置及び方法

    芝宏礼, 赤羽和徳, 上原一浩

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    Application no:特願2009-127641  Date applied:2009.5.27

    Announcement no:特開2010-278619  Date announced:2010.12.9

    Patent/Registration no:特許5143084  Date registered:2012.11.30 

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  • 受信利得制御方法、プログラム、および受信利得制御装置

    赤羽和徳, 芝宏礼, 上原一浩

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    Application no:特願2009-116462  Date applied:2009.5.13

    Announcement no:特開2010-268115  Date announced:2010.11.25

    Patent/Registration no:特許4920722  Date registered:2012.2.10 

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  • 受信装置及びベースバンド信号の処理方法

    山田貴之, 芝宏礼, 赤羽和徳, 上原一浩

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    Application no:特願2009-043178  Date applied:2009.2.25

    Announcement no:特開2010-200043  Date announced:2010.9.9

    Patent/Registration no:特許5020275  Date registered:2012.6.22 

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  • フィルタ回路

    平賀健, 関智弘, 西川健二郎, 上原一浩

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    Application no:特願2008-329885  Date applied:2008.12.25

    Announcement no:特開2010-154199  Date announced:2010.7.8

    Patent/Registration no:特許5047149  Date registered:2012.7.27 

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  • サービス提供システム、サービス提供装置、及び、プログラム

    芝宏礼, 上原一浩

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    Application no:特願2008-173851  Date applied:2008.7.2

    Announcement no:特開2010-015324  Date announced:2010.1.21

    Patent/Registration no:特許5020173  Date registered:2012.6.22 

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  • 無線通信システム、協調センシング方法、及び、総合判定局装置

    芝宏礼, 松井宗大, 赤羽和徳, 上原一浩, 山田貴之

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    Application no:特願2008-171193  Date applied:2008.6.30

    Announcement no:特開2010-11350  Date announced:2010.1.14

    Patent/Registration no:特許5078777  Date registered:2012.9.7 

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  • 遠隔測定処理システム及び遠隔測定処理方法

    赤羽和徳, 上原一浩, 鷹取泰司

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    Application no:特願2008-162292  Date applied:2008.6.20

    Announcement no:特開2010-004393  Date announced:2010.1.7

    Patent/Registration no:特許5111254  Date registered:2012.10.19 

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  • 無線通信装置およびその処理方法

    芝宏礼, 松井宗大, 赤羽和徳, 上原一浩

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    Application no:特願2008-145855  Date applied:2008.6.3

    Announcement no:特開2009-296146  Date announced:2009.12.17

    Patent/Registration no:特許5063488  Date registered:2012.8.17 

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  • Wide-range low-noise amplifire

    Munenari Kawashima, Yo Yamaguchi, Kazuhiro Uehara, Kenjiro Nishikawa

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    Application no:12/595163  Date applied:2008.5.16

    Patent/Registration no:8004363  Date registered:2011.8.23 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Wide-range low-noise amplifire

    Munenari Kawashima, Yo Yamaguchi, Kazuhiro Uehara, Kenjiro Nishikawa

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    Application no:8752875.8  Date applied:2008.5.16

    Patent/Registration no:2148433  Date registered:2011.8.17 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Wide-range low-noise amplifire

    Munenari Kawashima, Yo Yamaguchi, Kazuhiro Uehara, Kenjiro Nishikawa

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    Application no:8752875.8  Date applied:2008.5.16

    Patent/Registration no:2148433  Date registered:2011.8.17 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Wide-range low-noise amplifire

    Munenari Kawashima, Yo Yamaguchi, Kazuhiro Uehara, Kenjiro Nishikawa

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    Application no:2009-7022384  Date applied:2008.5.16

    Patent/Registration no:1098024  Date registered:2011.12.16 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • マルチモード通信装置及びその通信用回路

    山口陽, 上原一浩, 川島宗也, 西川健二郎

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    Application no:特願2008-087972  Date applied:2008.3.28

    Announcement no:特開2009-246477  Date announced:2009.10.22

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  • 無線通信モジュール

    山口陽, 上原一浩, 西川健二郎, 川島宗也, 望月秀幸

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    Application no:特願2008-087973  Date applied:2008.3.28

    Announcement no:特開2009-246478  Date announced:2009.10.22

    Patent/Registration no:特許4755666  Date registered:2011.6.3 

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  • RFフロントエンド回路

    山口陽, 上原一浩, 西川健二郎, 川島宗也, 望月秀幸

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    Application no:特願2008-085093  Date applied:2008.3.28

    Announcement no:特開2009-239763  Date announced:2009.10.15

    Patent/Registration no:特許4820837  Date registered:2011.9.9 

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  • 可変分周器

    山口陽, 上原一浩, 西川健二郎, 川島宗也

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    Application no:特願2008-085094  Date applied:2008.3.28

    Announcement no:特開2009-239764  Date announced:2009.10.15

    Patent/Registration no:特許4833241  Date registered:2011.9.30 

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  • マルチモード通信装置

    山口陽, 上原一浩, 川島宗也, 西川健二郎

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    Application no:特願2008-088660  Date applied:2008.3.28

    Announcement no:特開2009-246546  Date announced:2009.10.22

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  • 多段可変利得増幅器

    山口陽, 上原一浩, 西川健二郎, 川島宗也, 望月秀幸, 山田明, 菊池太樹

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    Application no:特願2008-085499  Date applied:2008.3.28

    Announcement no:特開2009-239794  Date announced:2009.10.15

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  • 可変利得増幅器

    山口陽, 上原一浩, 西川健二郎, 川島宗也, 望月秀幸, 山田明, 菊池太樹

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    Application no:特願2008-086273  Date applied:2008.3.28

    Announcement no:特開2009-239832  Date announced:2012.6.15

    Patent/Registration no:特許5014226  Date registered:2012.6.15 

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  • 無線装置及び信号検出方法

    山田貴之, 芝宏礼, 赤羽和徳, 上原一浩

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    Application no:特願2008-046531  Date applied:2008.2.27

    Announcement no:特開2009-206780  Date announced:2009.9.10

    Patent/Registration no:特許5042072  Date registered:2012.7.20 

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  • 無線通信システムおよび無線通信方法

    松井宗大, 芝宏礼, 赤羽和徳, 上原一浩

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    Application no:特願2008-012745  Date applied:2008.1.23

    Announcement no:特開2009-177403  Date announced:2009.8.6

    Patent/Registration no:特許5030805  Date registered:2012.7.6 

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  • 無線通信システム

    松井宗大, 芝宏礼, 赤羽和徳, 上原一浩

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    Application no:特願2007-290837  Date applied:2007.11.8

    Announcement no:特開2009-118320  Date announced:2009.5.28

    Patent/Registration no:特許4583430  Date registered:2010.9.10 

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  • チャネル割当て方法、無線通信システム、および管理局装置

    平賀健, 赤羽和徳, 上原一浩

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    Application no:特願2007-216063  Date applied:2007.8.22

    Announcement no:特開2009-049904  Date announced:2009.3.5

    Patent/Registration no:特許4881816  Date registered:2011.12.9 

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  • 無線通信システム、無線通信局装置および無線通信方法

    松井宗大, 芝宏礼, 赤羽和徳, 上原一浩, 平賀健

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    Application no:特願2007-163587  Date applied:2007.6.21

    Announcement no:特開2008-79280  Date announced:2008.4.3

    Patent/Registration no:特許4856012  Date registered:2011.11.4 

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  • チャネル割当て方法、管理局装置、および無線通信装置

    平賀健, 赤羽和徳, 上原一浩

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    Application no:特願2007-134144  Date applied:2007.5.21

    Announcement no:特開2008-289056  Date announced:2008.11.27

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  • 広帯域低雑音増幅器

    川島宗也, 山口陽, 上原一浩, 西川健二郎

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    Application no:特願2007-131076  Date applied:2007.5.16

    Announcement no:特開2008-288817  Date announced:2008.11.27

    Patent/Registration no:特許4857189  Date registered:2011.9.28 

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  • マルチリンク通信システム、マルチリンク通信方法、マルチリンク通信装置、マルチリンク通信システム管理方法、及びマルチリンク通信基地局

    芝宏礼, 赤羽和徳, 上原一浩, 松井宗大

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    Application no:特願2007-084550  Date applied:2007.3.28

    Announcement no:特開2008-245031  Date announced:2008.10.9

    Patent/Registration no:特許4554637  Date registered:2010.7.23 

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  • 無線通信システムおよび無線通信方法

    赤羽和徳, 上原一浩, 中村行宏, 越智裕之

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    Application no:特願2007-083837  Date applied:2007.3.28

    Announcement no:特開2008-244974  Date announced:2008.10.9

    Patent/Registration no:特許4428578  Date registered:2009.12.25 

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  • 電源回路

    加保貴奈, 山口陽, 上原一浩

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    Application no:特願2006-176266  Date applied:2006.6.27

    Announcement no:特開2008-010921  Date announced:2008.1.17

    Patent/Registration no:特許4472667  Date registered:2010.3.12 

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  • スイッチ回路

    加保貴奈, 山口陽, 上原一浩

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    Application no:特願2006-164917  Date applied:2006.6.14

    Announcement no:特開2007-336186  Date announced:2007.12.27

    Patent/Registration no:特許4680134  Date registered:2011.2.10 

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    加保貴奈, 山口陽, 上原一浩

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    Application no:特願2006-164918  Date applied:2006.6.14

    Announcement no:特開2007-336187  Date announced:2007.12.27

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  • 無線通信システム、無線通信局装置、無線端末装置および無線通信方法

    松井宗大, 芝宏礼, 赤羽和徳, 上原一浩, 平賀健

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    Application no:特願2006-228044  Date applied:2006.6.7

    Announcement no:特開2008-79280  Date announced:2008.4.3

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    赤羽和徳, 上原一浩, 梅比良正弘, 平賀健

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    Application no:特願2006-142940  Date applied:2006.5.23

    Announcement no:特開2007-318235  Date announced:2007.12.16

    Patent/Registration no:特許4648873  Date registered:2010.12.17 

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    川島宗也, 山口陽, 上原一浩, 梅比良正弘

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    Application no:特願2006-059585  Date applied:2006.3.6

    Announcement no:特開2007-243314  Date announced:2007.9.20

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    芝宏礼, 上原一浩, 荒木克彦

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    Application no:特願2003-138570  Date applied:2003.5.6

    Announcement no:特開2004-343500  Date announced:2004.12.2

    Patent/Registration no:特許4103678  Date registered:2008.4.4 

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  • マルチキャリア送受信方法およびその送信機と受信機

    松井宗大, 白戸裕史, 上原一浩, 荒木克彦

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    Application no:特願2002-237389  Date applied:2002.8.16

    Announcement no:特開2004-080340  Date announced:2004.3.11

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  • 通信方式切替無線機及び通信方式切替方法

    庄納崇, 山田知之, 白戸裕史, 上原一浩, 久保田周治

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    Application no:特願2001-50804  Date applied:2001.2.23

    Announcement no:特開2002-252580  Date announced:2002.9.6

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  • データ通信方法およびそのシステム

    須田裕之, 上原一浩, 吉岡博, 金山明弘

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    Application no:特願2000-344152  Date applied:2000.11.10

    Announcement no:特開2002-152113  Date announced:2002.5.24

    Patent/Registration no:特許3385005  Date registered:2002.12.10 

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  • データ通信方法及びそのシステム

    須田裕之, 上原一浩, 吉岡博, 金山明弘

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    Application no:特願2000-344151  Date applied:2000.11.10

    Announcement no:特開2002-152112  Date announced:2002.5.24

    Patent/Registration no:特許3392825  Date registered:2003.1.7 

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  • 通信方式切替交換局及び通信方式切替方法

    庄納崇, 上原一浩, 久保田周治

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    Application no:特願2000-255191  Date applied:2000.8.25

    Announcement no:特開2002-77965  Date announced:2002.3.15

    Patent/Registration no:特許3442356  Date registered:2003.6.20 

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  • 移動局

    山田知之, 上原一浩, 久保田周治

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    Application no:特願2000-082223  Date applied:2000.3.23

    Announcement no:特開2001-275142  Date announced:2001.10.5

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  • 無線通信システム・基地局・移動局

    山田知之, 上原一浩, 久保田周治

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    Application no:特願2000-081415  Date applied:2000.3.23

    Announcement no:特開2001-268006  Date announced:2001.9.28

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  • 無線通信システム・無線基地局・移動局

    山田知之, 上原一浩, 久保田周治

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    Application no:特願2000-081471  Date applied:2000.3.23

    Announcement no:特開2001-268633  Date announced:2001.9.28

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  • 無線基地局

    山田知之, 上原一浩, 久保田周治

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    Application no:特願2000-082257  Date applied:2000.3.23

    Announcement no:特開2001-274738  Date announced:2001.10.5

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  • 無線通信システム・無線基地局・移動局

    山田知之, 上原一浩, 久保田周治

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    Application no:特願2000-081470  Date applied:2000.3.23

    Announcement no:特開2001-268632  Date announced:2001.9.28

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  • 無線基地局

    山田知之, 上原一浩, 久保田周治

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    Application no:特願2000-082203  Date applied:2000.3.23

    Announcement no:特開2001-275150  Date announced:2001.10.5

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  • 無線ネットワーク、センタ局および無線局

    中山正芳, 大津徹, 工藤栄亮, 上原一浩, 久保田周治

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    Application no:特願2000-047725  Date applied:2000.2.24

    Announcement no:特開2001-237761  Date announced:2001.8.31

    Patent/Registration no:特許3420547  Date registered:2003.4.18 

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  • 無線通信におけるチャネル切り替え方式

    山田知之, 上原一浩, 久保田周治

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    Application no:特願平11-346908  Date applied:1999.12.6

    Announcement no:特開2001-169344  Date announced:2001.6.22

    Patent/Registration no:特許3464183  Date registered:2003.11.5 

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  • セル切替方式

    山田知之, 上原一浩, 久保田周治

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    Application no:特願平11-346909  Date applied:1999.12.6

    Announcement no:特開2001-169325  Date announced:2001.6.22

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  • 指向性・送信電力制御方式

    山田知之, 上原一浩, 久保田周治

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    Application no:特願平11-346907  Date applied:1999.12.6

    Announcement no:特開2001-168784  Date announced:2001.6.22

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  • 秘話通信装置

    杉田誠, 上原一浩, 久保田周治

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    Application no:特願平11-315922  Date applied:1999.11.5

    Announcement no:特開2001-134174  Date announced:2001.5.18

    Patent/Registration no:特許3748184  Date registered:2005.12.9 

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  • 通信装置

    芝宏礼, 上原一浩, 久保田周治

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    Application no:特願平11-306354  Date applied:1999.10.28

    Announcement no:特開2001-127820  Date announced:2001.5.11

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  • 無線通信システム制御装置

    芝宏礼, 庄納崇, 上原一浩, 久保田周治

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    Application no:特願平11-300827  Date applied:1999.10.22

    Announcement no:特開2001-128237  Date announced:2001.5.11

    Patent/Registration no:特許3442325  Date registered:2003.6.20 

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  • 認証手段変更方法

    杉田誠, 芝宏礼, 上原一浩, 久保田周治

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    Application no:特願平11-229078  Date applied:1999.8.13

    Announcement no:特開2001-54171  Date announced:2001.2.23

    Patent/Registration no:特許3445190  Date registered:2003.6.27 

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  • 秘話通信機の秘話方式設定方法

    杉田誠, 芝宏礼, 上原一浩, 久保田周治

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    Application no:特願平11-227250  Date applied:1999.8.11

    Announcement no:特開2001-53743  Date announced:2001.2.23

    Patent/Registration no:特許3722345  Date registered:2005.9.22 

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  • 通信方式切替無線端末及び通信方式切替方法

    庄納崇, 芝宏礼, 上原一浩, 久保田周治

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    Application no:特願平11-227331  Date applied:1999.8.11

    Announcement no:特開2001-54168  Date announced:2001.2.23

    Patent/Registration no:特許3442320  Date registered:2003.6.20 

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  • 無線通信端末のソフトウェア変更方法及び無線通信端末

    芝宏礼, 庄納崇, 上原一浩, 久保田周治

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    Application no:特願平11-218918  Date applied:1999.8.2

    Announcement no:特開2001-45567  Date announced:2001.2.16

    Patent/Registration no:特許3474805  Date registered:2003.9.19 

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  • 無線通信端末及び無線通信端末のソフトウェア変更方法

    芝宏礼, 庄納崇, 上原一浩, 久保田周治

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    Application no:特願平11-218917  Date applied:1999.8.2

    Announcement no:特開2001-45566  Date announced:2001.2.16

    Patent/Registration no:特許3478999  Date registered:2003.10.3 

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  • 無線通信端末のソフトウェア変更方法及び無線通信端末

    芝宏礼, 上原一浩, 久保田周治

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    Application no:特願平11-218919  Date applied:1999.8.2

    Announcement no:特開2001-43087  Date announced:2001.2.16

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  • 通信装置のソフトウェア変更方法及び通信装置

    芝宏礼, 上原一浩, 久保田周治

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    Application no:特願平11-218920  Date applied:1999.8.2

    Announcement no:特開2001-43073  Date announced:2001.2.16

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  • ソフトウェア無線装置

    白戸裕史, 中津川征士, 上原一浩, 鈴木康夫, 久保田周治

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    Application no:特願平11-214720  Date applied:1999.7.29

    Announcement no:特開2001-44882  Date announced:2001.2.16

    Patent/Registration no:特許3694196  Date registered:2005.7.1 

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  • 高周波伝送線路

    関智弘, 上原一浩, 村口正弘, 菅谷勇次郎, 鈴木仁

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    Application no:特願平10-317247  Date applied:1998.11.9

    Announcement no:特開2000-151201  Date announced:2000.5.30

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  • 高周波用コネクタ

    関智弘, 上原一浩, 村口正弘, 菅谷勇次郎, 鈴木仁

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    Application no:特願平10-317246  Date applied:1998.11.9

    Announcement no:特開2000-151220  Date announced:2000.5.30

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  • Antenna and manufacturing method therefor

    Tamami Maruyama, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:09/074176  Date applied:1998.5.7

    Patent/Registration no:6127987  Date registered:2000.10.3 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Antenna and manufacturing method therefor

    Tamami Maruyama, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:98401096.7  Date applied:1998.5.6

    Patent/Registration no:877443  Date registered:2008.1.2 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Antenna and manufacturing method therefor

    Tamami Maruyama, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:98401096.7  Date applied:1998.5.6

    Patent/Registration no:877443  Date registered:2008.1.2 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Antenna and manufacturing method therefor

    Tamami Maruyama, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:98401096.7  Date applied:1998.5.6

    Patent/Registration no:877443  Date registered:2008.1.2 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Antenna and manufacturing method therefor

    Tamami Maruyama, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:98401096.7  Date applied:1998.5.6

    Patent/Registration no:877443  Date registered:2008.1.2 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Antenna and manufacturing method therefor

    Tamami Maruyama, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:98401096.7  Date applied:1998.5.6

    Patent/Registration no:877443  Date registered:2008.1.2 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • アンテナ装置およびその製造方法

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平10-123142  Date applied:1998.5.6

    Announcement no:特開平11-27038  Date announced:1999.1.29

    Patent/Registration no:特許3519599  Date registered:2004.2.6 

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  • 多周波共用セクタアンテナ装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平10-123143  Date applied:1998.5.6

    Announcement no:特開平11-168318  Date announced:1999.6.22

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  • 適応アンテナ装置

    鷹取泰司, 長敬三, 堀俊和, 上原一浩, 西森健太郎

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    Application no:特願平10-053059  Date applied:1998.3.5

    Announcement no:特開平11-251986  Date announced:1999.9.17

    Patent/Registration no:特許3597694  Date registered:2004.9.17 

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  • アンテナ装置

    関智弘, 上原一浩, 鹿子嶋憲一

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    Application no:特願平09-276901  Date applied:1997.10.9

    Announcement no:特開平11-122027  Date announced:1999.4.30

    Patent/Registration no:特許3426934  Date registered:2003.5.9 

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  • アレーアンテナ装置

    鷹取泰司, 上原一浩, 鹿子嶋憲一

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    Application no:特願平09-276902  Date applied:1997.10.9

    Announcement no:特開平11-122028  Date announced:1999.4.30

    Patent/Registration no:特許3392330  Date registered:2003.1.24 

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  • 多周波共用セクタアンテナ装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平09-270858  Date applied:1997.10.3

    Announcement no:特開平11-168318  Date announced:1999.6.22

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  • ストリップ線路およびそれを用いたアンテナ装置

    丸山珠美, 鹿子嶋憲一, 上原一浩

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    Application no:特願平09-262533  Date applied:1997.9.26

    Announcement no:特開平11-103204  Date announced:1999.4.13

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  • 情報端末用アンテナ装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平09-188964  Date applied:1997.7.1

    Announcement no:特開平11-027024  Date announced:1999.1.29

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  • アンテナ装置およびその製造方法

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平09-119385  Date applied:1997.5.9

    Announcement no:特開平11-027038  Date announced:1999.1.29

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  • アンテナ装置

    関智弘, 上原一浩, 鹿子嶋憲一, 中津川征士

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    Application no:特願平09-108741  Date applied:1997.4.25

    Announcement no:特開平10-303640  Date announced:1998.11.13

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  • Multi sector antenna

    Tomohiro Seki, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:08/842568  Date applied:1997.4.15

    Patent/Registration no:5912646  Date registered:1999.6.15 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Multi sector antenna

    Tomohiro Seki, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:97400831.0  Date applied:1997.4.11

    Patent/Registration no:802579  Date registered:2005.9.14 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • Multi sector antenna

    Tomohiro Seki, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:97400831.0  Date applied:1997.4.11

    Patent/Registration no:802579  Date registered:2005.9.14 

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  • Multi sector antenna

    Tomohiro Seki, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:97400831.0  Date applied:1997.4.11

    Patent/Registration no:802579  Date registered:2005.9.14 

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  • Multi sector antenna

    Tomohiro Seki, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:97400831.0  Date applied:1997.4.11

    Patent/Registration no:802579  Date registered:2005.9.14 

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  • Multi sector antenna

    Tomohiro Seki, Kazuhiro Uehara, Kenich Kagoshima

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    Application no:97400831.0  Date applied:1997.4.11

    Patent/Registration no:802579  Date registered:2005.9.14 

    Country of applicant:Foreign country , International (PCT) application   Country of acquisition:Foreign country

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  • アンテナ切替装置

    関智弘, 上原一浩, 鹿子嶋憲一

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    Application no:特願平09-094517  Date applied:1997.3.31

    Announcement no:特開平10-285009  Date announced:1998.10.23

    Patent/Registration no:特許3567302  Date registered:2004.6.25 

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  • 無線通信空間

    岸野康博, 上原一浩, 鹿子嶋憲一

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    Application no:特願平09-043135  Date applied:1997.2.27

    Announcement no:特開平10-242683  Date announced:1998.9.11

    Patent/Registration no:特許3604526  Date registered:2004.9.28 

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  • マルチパス防止フェンス及びマルチパス防止設備

    岸野康博, 上原一浩, 鹿子嶋憲一

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    Application no:特願平09-043116  Date applied:1997.2.27

    Announcement no:特開平10-242748  Date announced:1998.9.11

    Patent/Registration no:特許3456512  Date registered:2003.7.8 

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  • アンテナ装置

    関智弘, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-270424  Date applied:1996.10.14

    Announcement no:特開平10-126137  Date announced:1998.5.15

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  • 携帯電話装置

    濱根利之, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-270646  Date applied:1996.10.14

    Announcement no:特開平10-126838  Date announced:1998.5.15

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  • アレーアンテナ装置

    鷹取泰司, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-250817  Date applied:1996.9.3

    Announcement no:特開平10-79619  Date announced:1998.3.24

    Patent/Registration no:特許3421719  Date registered:2003.4.25 

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  • 適応アンテナ装置

    鷹取泰司, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-250818  Date applied:1996.9.3

    Announcement no:特開平10-79618  Date announced:1998.3.24

    Patent/Registration no:特許3416865  Date registered:2003.4.11 

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  • 適応アンテナ装置

    鷹取泰司, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-245486  Date applied:1996.8.29

    Announcement no:特開平10-75112  Date announced:1998.3.17

    Patent/Registration no:特許3388529  Date registered:2003.1.17 

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  • アンテナ装置

    岸野康博, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-220774  Date applied:1996.8.5

    Announcement no:特開平10-51215  Date announced:1998.2.20

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  • 2周波共用アンテナ

    関智弘, 丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-215942  Date applied:1996.7.30

    Announcement no:特開平10-051222  Date announced:1998.2.20

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  • 2周波共用アンテナ

    関智弘, 丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-215943  Date applied:1996.7.30

    Announcement no:特願平10-51233  Date announced:1998.2.20

    Patent/Registration no:特許3453694  Date registered:2003.7.25 

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  • アンテナ装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-213256  Date applied:1996.7.25

    Announcement no:特開平10-041744  Date announced:1998.2.13

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  • 無線通信装置

    安藤篤也, 上原一浩, 鹿子嶋憲一

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    Application no:特願平08-111367  Date applied:1996.5.2

    Announcement no:特開平09-298501  Date announced:1997.11.18

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  • セクタアンテナ

    上原一浩, 関智弘, 鹿子嶋憲一

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    Application no:特願平08-092249  Date applied:1996.4.15

    Announcement no:特開平09-284045  Date announced:1997.10.31

    Patent/Registration no:特許3456507  Date registered:2003.8.1 

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  • アンテナ装置および誘電体ユニット

    佐々木正年, 柴田幸司, 丸山珠美, 上原一浩, 白土正

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    Application no:特願平07-312852  Date applied:1995.11.30

    Announcement no:特開平09-153729  Date announced:1997.6.10

    Patent/Registration no:特許3286512  Date registered:2002.3.8 

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  • アンテナ装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平07-314884  Date applied:1995.11.9

    Announcement no:特開平09-135115  Date announced:1997.5.20

    Patent/Registration no:特許3353218  Date registered:2002.9.27 

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  • 無線通信装置

    上原一浩, 濱根利之, 鹿子嶋憲一

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    Application no:特願平07-285321  Date applied:1995.11.1

    Announcement no:特開平09-130321  Date announced:1997.5.16

    Patent/Registration no:特許3192360  Date registered:2001.5.25 

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  • アンテナ装置

    上原一浩, 濱根利之, 鹿子嶋憲一, 安藤篤也

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    Application no:特願平07-247344  Date applied:1995.9.26

    Announcement no:特開平09-93009  Date announced:1997.4.4

    Patent/Registration no:特許3411428  Date registered:2003.3.20 

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  • バトラーマトリクス回路とアンテナ装置

    上原一浩, 鹿子嶋憲一, 関智弘

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    Application no:特願平07-243504  Date applied:1995.9.21

    Announcement no:特開平09-93008  Date announced:1997.4.4

    Patent/Registration no:特許3255217  Date registered:2001.11.30 

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  • アンテナ

    上原一浩, 鹿子嶋憲一, 関智弘

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    Application no:特願平07-243505  Date applied:1995.9.21

    Announcement no:特開平09-93013  Date announced:1997.4.4

    Patent/Registration no:特許3296399  Date registered:2002.4.12 

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  • アンテナ装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平07-205139  Date applied:1995.7.20

    Announcement no:特開平09-36654  Date announced:1997.2.7

    Patent/Registration no:特許3261606  Date registered:2001.12.21 

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  • モノポールアレイアンテナ及びアンテナ素子の製造方法

    佐々木正年, 柴田幸司, 丸山珠美, 上原一浩, 鈴木俊雄

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    Application no:特願平07-175697  Date applied:1995.7.12

    Announcement no:特開平09-027713  Date announced:1997.1.28

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  • アンテナ装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平07-175654  Date applied:1995.6.20

    Announcement no:特開平09-008546  Date announced:1997.1.10

    Patent/Registration no:特許3259211  Date registered:2001.12.14 

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  • アンテナ装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平07-142299  Date applied:1995.6.9

    Announcement no:特開平08-335825  Date announced:1996.12.17

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  • 携帯端末

    関智弘, 上原一浩, 鹿子嶋憲一

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    Application no:特願平07-119956  Date applied:1995.5.18

    Announcement no:特開平08-316904  Date announced:1996.11.29

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  • 携帯端末装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平07-097342  Date applied:1995.4.24

    Announcement no:特開平08-293829  Date announced:1996.11.5

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  • アンテナ装置

    丸山珠美, 上原一浩, 鹿子嶋憲一

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    Application no:特願平07-111044  Date applied:1995.4.13

    Announcement no:特開平08-287017  Date announced:1996.11.1

    Patent/Registration no:特許3013285  Date registered:1999.12.17 

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  • 無線通信方法

    上原一浩, 鹿子嶋憲一, 安藤篤也

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    Application no:特願平07-107775  Date applied:1995.4.10

    Announcement no:特開平08-288901  Date announced:1996.11.1

    Patent/Registration no:特許3210931  Date registered:2001.7.19 

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  • 受信装置

    上原一浩, 鹿子嶋憲一, 安藤篤也

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    Application no:特願平07-104603  Date applied:1995.4.6

    Announcement no:特開平08-279780  Date announced:1996.10.22

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  • アンテナ装置

    上原一浩, 鹿子嶋憲一, 関智弘

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    Application no:特願平07-104602  Date applied:1995.4.6

    Announcement no:特開平08-279711  Date announced:1996.10.22

    Patent/Registration no:特許3284433  Date registered:2002.3.8 

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  • 無線通信方法

    上原一浩, 鹿子嶋憲一, 関智弘

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    Application no:特願平07-085983  Date applied:1995.3.20

    Announcement no:特開平08-265033  Date announced:1996.10.11

    Patent/Registration no:特許3286879  Date registered:2002.3.15 

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  • バトラーマトリクス回路および該回路による給電方法

    関智弘, 上原一浩, 鹿子嶋憲一

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    Application no:特願平07-050228  Date applied:1995.3.9

    Announcement no:特開平08-250923  Date announced:1996.9.27

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  • アレイアンテナおよびアレイアンテナへの給電方法

    関智弘, 上原一浩, 鹿子嶋憲一

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    Application no:特願平07-050225  Date applied:1995.3.9

    Announcement no:特開平08-250922  Date announced:1996.9.27

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  • 電源端子

    関智弘, 上原一浩, 鹿子嶋憲一

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    Application no:特願平06-325773  Date applied:1994.12.27

    Announcement no:特開平08-185941  Date announced:1996.7.16

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  • 無線通信方法及び装置

    上原一浩, 鹿子嶋憲一, 関智弘

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    Application no:特願平06-311028  Date applied:1994.12.14

    Announcement no:特開平08-167871  Date announced:1996.6.25

    Patent/Registration no:特許3265877  Date registered:2002.1.11 

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  • 無線送受信装置

    上原一浩, 鹿子嶋憲一

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    Application no:特願平06-251531  Date applied:1994.9.21

    Announcement no:特開平08-097632  Date announced:1996.4.12

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  • 無線ゾーン構成法

    上原一浩, 鹿子嶋憲一, 関智弘

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    Application no:特願平06-242440  Date applied:1994.9.12

    Announcement no:特開平08-84367  Date announced:1996.3.26

    Patent/Registration no:特許3166024  Date registered:2001.3.9 

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  • 無線ゾーン構成法

    上原一浩, 鹿子嶋憲一, 関智弘

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    Application no:特願平06-242439  Date applied:1994.9.12

    Announcement no:特開平08-84366  Date announced:1996.3.26

    Patent/Registration no:特許3166023  Date registered:2001.3.9 

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  • アクティブアンテナ

    上原一浩, 鹿子嶋憲一

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    Application no:特願平06-019049  Date applied:1994.2.16

    Announcement no:特開平07-226611  Date announced:1995.8.22

    Patent/Registration no:特許3306816  Date registered:2002.5.17 

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  • 無線送受信装置

    上原一浩, 鹿子嶋憲一

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    Application no:特願平06-023073  Date applied:1994.1.25

    Announcement no:特開平07-226694  Date announced:1995.8.22

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  • 反射鏡アンテナ

    上原一浩, 鹿子嶋憲一, 近藤彰

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    Application no:特願平06-000618  Date applied:1994.1.7

    Announcement no:特開平07-202561  Date announced:1995.8.4

    Patent/Registration no:特許3498856  Date registered:2003.11.18 

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  • Transceiver for wireless in-building communication sytem

    Kazuhiro Uehara, Kenich Kagoshima

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    Application no:124477  Date applied:1993.9.22

    Patent/Registration no:5424859  Date registered:1995.6.13 

    Country of applicant:Foreign country   Country of acquisition:Foreign country

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  • 無線送受信装置

    上原一浩, 鹿子嶋憲一

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    Application no:特願平05-196758  Date applied:1993.7.15

    Announcement no:特開平07-38481  Date announced:1995.2.7

    Patent/Registration no:特許3312306  Date registered:2002.5.31 

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  • 無線送受信装置

    上原一浩, 鹿子嶋憲一

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    Application no:特願平05-196759  Date applied:1993.7.15

    Announcement no:特開平07-38480  Date announced:1995.2.7

    Patent/Registration no:特許3312307  Date registered:2002.5.31 

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  • 無線中継装置

    上原一浩, 鹿子嶋憲一

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    Application no:特願平05-030952  Date applied:1993.2.19

    Announcement no:特開平06-244837  Date announced:1994.9.2

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  • 無線中継装置

    上原一浩, 鹿子嶋憲一

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    Application no:特願平05-030951  Date applied:1993.2.19

    Announcement no:特開平06-244836  Date announced:1994.9.2

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  • 無線警告方法

    上原一浩, 鹿子嶋憲一

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    Application no:特願平05-014571  Date applied:1993.2.1

    Announcement no:特開平06-232827  Date announced:1994.8.19

    Patent/Registration no:特許3197381  Date registered:2001.6.8 

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  • 無線中継装置

    上原一浩, 鹿子嶋憲一, 森田浩三

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    Application no:特願平04-352894  Date applied:1992.12.14

    Announcement no:特開平06-181452  Date announced:1994.6.28

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  • 無線中継装置

    上原一浩, 鹿子嶋憲一, 森田浩三

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    Application no:特願平04-352893  Date applied:1992.12.14

    Announcement no:特開平06-181451  Date announced:1994.6.28

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  • 無線送受信装置

    上原一浩, 鹿子嶋憲一

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    Application no:特願平04-329880  Date applied:1992.11.17

    Announcement no:特開平06-164460  Date announced:1994.6.10

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  • 無線中継方式

    上原一浩, 鹿子嶋憲一

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    Application no:特願平04-287962  Date applied:1992.10.26

    Announcement no:特開平06-140969  Date announced:1994.5.20

    Patent/Registration no:特許2950528  Date registered:1999.7.9 

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  • 無線送受信装置

    上原一浩, 鹿子嶋憲一

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    Application no:実願平4-72081  Date applied:1992.9.24

    Date announced:1994.4.22

    Patent/Registration no:実案2587001  Date registered:1998.10.9 

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▼display all

Awards

  • Chugoku Branch Best Presentation Award

    2022.3   IEICE   Spatially Parallel Signal Transmission by Adaptive Transmission Allocation for LED Visible Light Wireless Communications

    Sota Hikasa, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

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    Country:Japan

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  • ICETC Student Presentation Award

    2021.12   IEICE   Receivable signal sequence number increase by spatially parallel signal transmission in LED visible light wireless communications

    Ryosuke Okamoto, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

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    Award type:Award from international society, conference, symposium, etc.  Country:Japan

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  • HISS Best Paper Award

    2021.11   IEEE   Transmission performance improvement by LED amplitude deviation compensation of frequency response and non-linear distortion compensation in visible light communications

    Norihiro Tokui, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Member and Geographic Activities (MGA) Member Recruitment and Recovery Committee Award

    2021.10   IEEE  

    Kazuhiro Uehara, et al.

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    Award type:Award from international society, conference, symposium, etc.  Country:United States

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  • HISS Excellent Paper Award

    2020.11   IEEE   A Bandwidth Control Method for Multi-Band Wireless Systems according to External System Interference and Inter-System Power Ratio

    Kanta Haino, Shigeru Tomisato, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • HISS Excellent Paper Award

    2020.11   IEEE   Coverage Improvement by Bandwidth Control Corresponding to Channel Fluctuation in Spectrum Sharing Systems

    Wataru Okada, Shigeru Tomisato, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • HISS Excellent Paper Award

    2020.11   IEEE   Transmission Performance Improvement by LED Amplitude Deviation Compensation of Frequency Response in Visible Light Communications

    Takeru Fukuyama, Shigeru Tomisato, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Communications Society Distinguished Contributions Award

    2020.9   IEICE   研専運営会議副議長としての貢献

    Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Chugoku Branch Best Presentation Award

    2020.2   IEICE   Transmission performance evaluation by IoT terminal non-linearity with multiple bands

    Naoto Takamatsu, Shigeru Tomisato, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • HISS Excellent Paper Award

    2019.12   IEEE   LED visible light communications by pre-distortion and non-linear distortion noise canceling

    Keitaro Hirai, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • HISS Excellent Paper Award

    2019.12   IEEE   A study on a new separation and demodulation method for collided signals using stored batch signal processing

    Toru Nishiyama, Ryuku Miyachi, Humiya Ohno, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • HISS Excellent Paper Award

    2019.12   IEEE   Interference power reduction effect according to the number of bandwidth control bands in multi-band IoT systems

    Naoto Takamatsu, Shigeru Tomisato, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • MIKA 2019 Excellent Poster Award (Young Section)

    2019.10   IEICE   A study on signal separation and demodulation method for collided signal in stored batch signal processing

    Toru Nishiyama, Ryuku Miyachi, Humiya Ohno, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • HISS Excellent Presentation Award

    2018.11   IEEE   An experimental and computational study of radio propagation modeling for underground structure

    Kazuki Yawata, Kazuki Shimada, Yusuke Kataoka, Ryuku Miyachi, Shigeru Tomisato, Shigeru Teruhi, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • HISS Best Presentation Award

    2018.11   IEEE   Interference characteristic evaluation in spatial multiplexing in LED visible light wireless communications

    Yusuke Kamei, Shigeru Tomisato, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • MGA Member Recruitment and Recovery Committee Award

    2018.10   IEEE  

    Kazuhiro Uehara, et al.

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    Award type:Award from international society, conference, symposium, etc.  Country:United States

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  • Chugoku Branch Best Presentation Award

    2018.3   IEICE   A non-linear distortion compensation method in a receiver for LEDs of visible light communications

    Takeshi Okada, Shigeru Tomisato, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • HISS Excellent Paper Award

    2017.12   IEEE   An experimental study of radio propagation modeling for underground structure

    Kazuki Shimada, Yusuke Kataoka, Ryuku Miyachi, Shigeru Tomisato, Shigeru Teruhi, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • SRW Student Award

    2017.6   IEICE   Transmission performance of visible light communications using saturated LEDs

    Takahiro Chikamori, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Excellent Paper Award

    2017.6   IEICE   A balanced mixer using asymmetric stacked lines for a quasi-millimeter wave band

    Yo Yamaguchi, Takana Kaho, Ichihiko Toyoda, Kazuhiro Uehara, Tadao Nakagawa, Kiyomichi Araki

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • Chugoku Branch Best Presentation Award

    2017.3   IEICE   Transmission Performance Degradation by Non-Linear Distortion of LEDs and its Compensation Method in Visible Light Communications

    Takahiro Chikamori, Takaaki Kumagai, Shigeru Tomisato, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Achievement Award

    2015.6   IEICE   Research and development of software defined radio and cognitive radio technologies

    Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Excellent Paper Award

    2015.6   IEICE   Nonlinear Modeling and Analysis on Concurrent Amplification of Dual-Band Gaussian Signals

    Ikuma Ando, Gia Khanh Tran, Kiyomichi Araki, Takayuki Yamada, Takana Kaho, Yo Yamaguchi, Kazuhiro Uehara

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • Communication Society Best ComEX Letter Award

    2015.5   IEICE   Performance evaluation of a simple decoding method for millimeter-wave short-range MIMO transmission through a wall

    Kazumitsu Sakamoto, Ken Hiraga, Tomohiro Seki, Tadao Nakagawa, Kazuhiro Uehara

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • Best Technical Exhibition Award, 2014 Singapore-Japan International Workshop on Smart Wireless Communications

    2014.10   IEICE   Broadband spectrum sensing platform based on received waveform cross-correlation using distributed sensors

    Takayuki Yamada, Doohwan Lee, Hiroyuki Shiba, Yo Yamaguchi, Takana Kaho, Tadao Nakagawa, Kazuhiro Uehara

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    Award type:Award from international society, conference, symposium, etc.  Country:Singapore

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  • Fellow

    2012.9   IEICE   Research and development of software defined radio and cognitive radio technologies

    Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Communication Society Best Paper Award

    2012.5   IEICE   Combined Nyquist and compressed sampling method for radio wave data compression of a heterogeneous network system

    Doohwan Lee, Takayuki Yamada, Hiroyuki Shiba, Yo Yamaguchi, Kazuhiro Uehara

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • Communications Society Distinguished Contributions Award

    2011.9   IEICE   CrownCom2011 General Co-chairとしての貢献

    Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Communications Society Outstanding Contributions Award

    2011.9   IEICE   ソフトウェア無線研究専門委員会前委員長としての貢献

    Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Special Award in Software Radio

    2011.4   IEICE   Proposal of flexible wireless system to receive multi-band multi signals simultaneously

    Hiroyuki Shiba, Takana Kaho, Takayuki Yamada, Doohwan Lee, Yo Yamaguchi, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Best Paper Award in Software Radio

    2011.4   IEICE   Combined Nyquist and compressed sampling method for wireless multiband receiver

    Doohwan Lee, Takayuki Yamada, Hiroyuki Shiba, Yo Yamaguchi, Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • Telecom System Technology Award

    2003.3   Telecommunications Advancement Foundation   Software Defined Radio Prototype for PHS and IEEE 802.11 Wireless LAN

    Hiroyuki Shiba, Takashi Shono, Yushi Shirato, Ichihiko Toyoda, Kazuhiro Uehara, Masahiro Umehira

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    Award type:Award from publisher, newspaper, foundation, etc.  Country:Japan

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  • Yokosuka Telecom Research Park (YRP) Award

    2002.3   Yokosuka Telecom Research Park (YRP) R&D Promotion Committee   Software Defined Radio Prototypes for Multimode Operation

    Kazuhiro Uehara, Yasuo Suzuki, Masashi Nakatsugawa, Shuji Kubota

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    Award type:Award from publisher, newspaper, foundation, etc.  Country:Japan

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  • NTT Network Innovation Laboratories R&D Award

    2002.3   Nippon Telegraph and Telephone Corporation   Development of software radio Core technology

    Kazuhiro Uehara, Masashi Nakatsugawa, Tadao Nakagawa, Yushi Shirato, Hiroyuki Shiba, Takashi Shono, Hiroshi Yoshioka, Munerari Kawashima

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    Country:Japan

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  • Excellent Paper Award

    1998.5   IEICE   Design and analysis of small multi-sector antenna for wireless LANs made by monopole Yagi-Uda array antenna

    Tamami Maruyama, Kazuhiro Uehara, Kenichi Kagoshima

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

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  • R&D Award

    1996.12   Nippon Telegraph and Telephone Corporation   Practical application of high-speed wireless LAN system

    Kazuhiro Uehara, et al.

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    Country:Japan

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  • Young Researcher's Award

    1996.3   IEICE   Indoor Propagation Delay Characteristics Considering Antenna Sidelobes, A theoretical study of indoor propagation delay characteristics calculating array patterns

    Kazuhiro Uehara

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • NTT Wireless Systems Laboratories R&D Award

    1993.12   Nippon Telegraph and Telephone Corporation  

    Kazuhiro Uehara

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    Country:Japan

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Research Projects

  • 無線マルチホップネットワークにおける過負荷通信の研究

    Grant number:21K04061  2021.04 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    田野 哲, 上原 一浩, 冨里 繁, 侯 亜飛

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    Authorship:Coinvestigator(s) 

    Grant amount:\4160000 ( Direct expense: \3200000 、 Indirect expense:\960000 )

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  • 2D/3D indoor localization using multiple leaky coaxial cables over irregular wireless coverage environment.

    Grant number:20K04484  2020.04 - 2023.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    侯 亜飛, 上原 一浩, 冨里 繁, 田野 哲

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    Authorship:Coinvestigator(s) 

    Grant amount:\4420000 ( Direct expense: \3400000 、 Indirect expense:\1020000 )

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  • IoTの本格普及に向けた、衝突した端末信号の分離・復調技術の開発

    Grant number:20K04465  2020.04 - 2023.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    上原 一浩, 冨里 繁, 田野 哲

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    Authorship:Principal investigator 

    Grant amount:\4290000 ( Direct expense: \3300000 、 Indirect expense:\990000 )

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  • A study of broadband LED visible light communication systems for IoT

    Grant number:18K04143  2018.04 - 2021.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    冨里 繁, 上原 一浩, 田野 哲

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    Authorship:Coinvestigator(s) 

    Grant amount:\4420000 ( Direct expense: \3400000 、 Indirect expense:\1020000 )

    可視光通信用LEDの非線形歪補償手法として,圧縮・伸長処理を行う非線形歪補償手法とプリディストーションとを組み合わせる提案手法について,実用的なシステムを想定したパラメータで有効性を検討することにより,受信レベルによらず線形化できることを明らかにした.
    さらに,送信側の非線形歪補償で残留する非線形歪を,受信信号の仮判定結果から受信側でキャンセルする手法を提案し,送信側のプリディストーションと組み合わせることで,より効果的に非線形歪補償ができることを明らかにした.この提案手法を用いることにより,LEDにおける入力バックオフを2dBとした飽和領域で利用した場合でも,良好な受信特性が得られることを計算機シミュレーションにより明らかにした.
    また,広帯域信号伝送時に問題となるLEDの周波数特性における振幅偏差について,送信電力制御と受信側の非線形歪補償により補償する手法を提案し,信号帯域内の偏差が12dBの信号に対して,その有効性を明らかにした.
    LED可視光通信システムの広帯域化のため,複数のLED照明と同じ場所に配置した複数の受光素子を空間的に並列な信号伝送を行う手法を新たに提案した.また,提案手法の有効性を計算機シミュレーションにより評価し,その評価結果から,屋内の90%以上の地点で,複数のLED照明からの信号を同時に受信することが可能であることを示した.このことから,可視光通信においても空間的並列信号伝送が可能で,等価的に伝送信号を広帯域化できることを明らかにした.

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  • Development of terminal signal contention-free cloud receiver technology in the IoT era

    Grant number:17K06425  2017.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    Uehara Kazuhiro

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    Authorship:Principal investigator 

    Grant amount:\4940000 ( Direct expense: \3800000 、 Indirect expense:\1140000 )

    The signal separation algorithm extracts the power component and the phase component on the center frequency of the desired signal by the short-time Fourier transform (STFT) as a feature value from the time-continuous frequency characteristics of the overlapping received signals. The desired signal is restored by multiplying this feature value by the power component and phase component of the reference signal. The performance of this algorithm was evaluated for various modulation schemes by calculation and experiments and its effectiveness was shown. In addition, we have newly proposed a feature value demodulation method that can improve the separation / demodulation performance. It has been shown that when the number of multi-values becomes large, a remarkable effect appears, and for example, it becomes possible to separate and demodulate 16QAM signals which could not be separated by the conventional technology.

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  • ミリ波帯イメージングアレイの研究

    Grant number:02952164  1990

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Encouragement of Young Scientists (Research Fellowship)  Grant-in-Aid for Encouragement of Young Scientists (Research Fellowship)

    上原 一浩

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    Authorship:Principal investigator 

    Grant amount:\900000 ( Direct expense: \900000 )

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Class subject in charge

  • Seminar in Mobile Communications (2021academic year) Year-round  - その他

  • Mobile Communications Engineering (2021academic year) Late  - 木5,木6

  • Mobile Communications (2021academic year) Late  - その他

  • Differential Equation (2021academic year) 3rd and 4th semester  - 火3,火4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - [第3学期]火3,火4, [第4学期]火3~4

  • Differential Equation (2021academic year) 3rd and 4th semester  - 火3,火4

  • Differential Equation (2021academic year) 3rd and 4th semester  - 火3,火4

  • Differential Equation (2021academic year) 3rd and 4th semester  - 火3,火4

  • Differential Equation (2021academic year) 3rd and 4th semester  - 火3,火4

  • Differential Equation (2021academic year) 3rd and 4th semester  - 火3,火4

  • Differential Equation (2021academic year) 3rd and 4th semester  - 火3,火4

  • Differential Equation (2021academic year) 3rd and 4th semester  - 火3,火4

  • Differential Equation 1 (2021academic year) Third semester  - 火3,火4

  • Differential Equation 1 (2021academic year) Third semester  - 火3,火4

  • Differential Equation 1 (2021academic year) Third semester  - 火3,火4

  • Differential Equation 1 (2021academic year) Third semester  - 火3,火4

  • Differential Equation 1 (2021academic year) Third semester  - 火3,火4

  • Differential Equation 1 (2021academic year) Third semester  - 火3,火4

  • Differential Equation 1 (2021academic year) Third semester  - 火3,火4

  • Differential Equation 1 (2021academic year) Third semester  - 火3,火4

  • Differential Equation 2 (2021academic year) Fourth semester  - 火3,火4

  • Differential Equation 2 (2021academic year) Fourth semester  - 火3,火4

  • Differential Equation 2 (2021academic year) Fourth semester  - 火3,火4

  • Differential Equation 2 (2021academic year) Fourth semester  - 火3,火4

  • Differential Equation 2 (2021academic year) Fourth semester  - 火3,火4

  • Differential Equation 2 (2021academic year) Fourth semester  - 火3,火4

  • Differential Equation 2 (2021academic year) Fourth semester  - 火3,火4

  • Differential Equation 2 (2021academic year) Fourth semester  - 火3,火4

  • Specific Research of Electronics and Information Systems Engineering (2021academic year) Year-round  - その他

  • Introduction to Electrical and Communication (2021academic year) special  - その他

  • Introduction to Electrical and Communication (2021academic year) special  - その他

  • Electromagnetic Wave Engineering (2021academic year) Second semester  - 火5,火6

  • Seminar in Mobile Communications (2020academic year) Year-round  - その他

  • Mobile Communications Engineering (2020academic year) Late  - 木5,木6

  • Mobile Communications (2020academic year) Late  - その他

  • Technical English II (2020academic year) 1st and 2nd semester  - [第1学期], [第2学期]

  • Differential Equation (2020academic year) 3rd and 4th semester  - 火3,火4

  • Differential Equation 1 (2020academic year) Third semester  - 火3,火4

  • Differential Equation 2 (2020academic year) Fourth semester  - 火3,火4

  • Specific Research of Electronics and Information Systems Engineering (2020academic year) Year-round  - その他

  • Introduction to Electrical and Communication (2020academic year) Summer concentration  - その他

  • Introduction to Electrical and Communication (2020academic year) Summer concentration  - その他

  • Electromagnetic Wave Engineering (2020academic year) Second semester  - 火5,火6

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Media Coverage

  • 共同研究センター開設半年、産学マッチング着実に Newspaper, magazine

    山陽新聞  山陽新聞  エリアNOW  2020.4

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