Presentation 2021-07-14
A Study on The Effect of Correlated Fading on Joint Transmit-receive Diversity and MIMO Spatial Multiplexing
Fumiyuki Adachi, Ryo Takahashi,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Joint transmit-receive diversity (JTRD) is one of diversity techniques to mitigate the degradation of communication quality due to multipath fading. In JTRD, the transmitter and receiver cooperate so as to maximize the received signal-to-noise ratio (SNR). On the other hand, eigenmode beamforming (EMBF) technique is known to transmit multiple data streams by taking advantage of multi-input multi-output (MIMO) channel. The transmit and receive weight matrices are unitary matrices composed of the right and left singular vectors, respectively. In this paper, it is shown that the transmit and receive diversity weight vectors of optimal JTRD are respectively equivalent to the right and left singular vectors which correspond to the first singular value and accordingly, that optimal JTRD corresponds to the single-stream EMBF using the first singular value. In optimal JTRD, the achievable channel capacity improves as the fading correlation at the receiver side gets stronger. We try to understand such a behavior from a viewpoint of EMBF in correlated Rayleigh fading channels. By Monte-Carlo numerical computation assuming two-antenna receiver case, such a behavior of optimal JTRD is shown to come from a fact that as the fading correlation gets stronger, the 2nd singular value (eigenvalue) deteriorates rapidly and, in return, the first singular value (eigenvalue) gets stronger.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Joint transmit-receive diversity / eigenmode beamforming / fading correlation
Paper # RCS2021-79
Date of Issue 2021-07-07 (RCS)

Conference Information
Committee RCS / SR / NS / SeMI / RCC
Conference Date 2021/7/14(3days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English) Communication and Network Technology of the AI Age, M2M (Machine-to-Machine),D2D (Device-to-Device),IoT(Internet of Things), etc
Chair Eiji Okamoto(Nagoya Inst. of Tech.) / Suguru Kameda(Hiroshima Univ.) / Akihiro Nakao(Univ. of Tokyo) / Koji Yamamoto(Kyoto Univ.) / HUAN-BANG LI(NICT)
Vice Chair Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) / Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Kazuto Yano(ATR) / Tetsuya Oishi(NTT) / Kazuya Monden(Hitachi) / Yasunori Owada(NICT) / Shunichi Azuma(Nagoya Univ.) / Koji Ishii(Kagawa Univ.)
Secretary Toshihiko Nishimura(NEC) / Tomoya Tandai(Panasonic) / Fumihide Kojima(Mie Univ.) / Osamu Takyu(Tokai Univ.) / Kentaro Ishidu(NTT) / Kazuto Yano(NTT) / Tetsuya Oishi(Chuo Univ.) / Kazuya Monden(Cyber Univ.) / Yasunori Owada(Waseda Univ.) / Shunichi Azuma(Osaka Univ.) / Koji Ishii(CRIEPI)
Assistant Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Mai Ohta(Fukuoka Univ.) / Taichi Ohtsuji(NEC) / WANG Xiaoyan(Ibaraki Univ.) / Akemi Tanaka(MathWorks) / Kotaro Mihara(NTT) / Yuki Katsumata(NTT DOCOMO) / Akihito Taya(Aoyama Gakuin Univ.) / Yu Nakayama(Tokyo Univ. of Agri. and Tech.) / SHAN LIN(NICT) / Masaki Ogura(Osaka Univ.)

Paper Information
Registration To Technical Committee on Radio Communication Systems / Technical Committee on Smart Radio / Technical Committee on Network Systems / Technical Committee on Sensor Network and Mobile Intelligence / Technical Committee on Reliable Communication and Control
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Study on The Effect of Correlated Fading on Joint Transmit-receive Diversity and MIMO Spatial Multiplexing
Sub Title (in English)
Keyword(1) Joint transmit-receive diversity
Keyword(2) eigenmode beamforming
Keyword(3) fading correlation
1st Author's Name Fumiyuki Adachi
1st Author's Affiliation Tohoku University(Tohoku Univ.)
2nd Author's Name Ryo Takahashi
2nd Author's Affiliation Tohoku University(Tohoku Univ.)
Date 2021-07-14
Paper # RCS2021-79
Volume (vol) vol.121
Number (no) RCS-103
Page pp.pp.13-18(RCS),
#Pages 6
Date of Issue 2021-07-07 (RCS)