| Presentation | 2020-07-08 Zero-forcing based Multi-user MIMO Coordinated with User-wise Joint Transmit-receive Diversity Fumiyuki Adachi, Ryo Takahashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Multi-user MIMO multiplexing coordinated with spatial diversity is a promising technique to improve the transmission quality and the link capacity. In this paper, user-wise maximal-ratio based joint transmit-receive diversity （user-wise MRJTRD） at both base station (BS) and the user sides is introduced to zero-focing (ZF)-based multi-user MIMO. Assuming spatial-multiplexing of U users, each equipped with N antennas, by a base station (BS) equipped with M antennas, multi-user MIMO channel matrix of size is transformed into a multi-user virtual MIMO channel matrix of much smaller size . We derive general expressions for the ZF matrix, the transmit power normalization factor, and the received signal-to-noise ratio (SNR) of the downlink and uplink transmissions. Then, we derive a closed-form expression for the achievable SNR conditioned on the U=2-user virtual MIMO channel. Assuming a case of U=N=2 and arbitrary M, the downlink and uplink capacities are numerically evaluated by Monte-Carlo simulation in a Rayleigh fading environment to compare the user-wise MRJTRD and the user-wise maximal-ratio based transmitting and combining diversity (which employs the spatial diversity only at the user side and is called user-wise MRTCD). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Multi-user MIMO multiplexing / joint transmit-receive diversity / zero-forcing |
| Paper # | RCS2020-65 |
| Date of Issue | 2020-07-01 (RCS) |
| Conference Information | |
| Committee | SR / NS / SeMI / RCC / RCS |
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| Conference Date | 2020/7/8(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 | Masayuki Ariyoshi(NEC) / Akihiro Nakao(Univ. of Tokyo) / Susumu Ishihara(Shizuoka Univ.) / HUAN-BANG LI(NICT) / Eiji Okamoto(Nagoya Inst. of Tech.) |
| Vice Chair | Suguru Kameda(Tohoku Univ.) / Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Tetsuya Oishi(NTT) / Kazuya Monden(Hitachi) / Koji Yamamoto(Kyoto Univ.) / Shunichi Azuma(Nagoya Univ.) / Koji Ishii(Kagawa Univ.) / Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) |
| Secretary | Suguru Kameda(ATR) / Osamu Takyu(Univ. of Electro-Comm.) / Kentaro Ishidu(Mie Univ.) / Tetsuya Oishi(NTT) / Kazuya Monden(Chuo Univ.) / Koji Yamamoto(Kyoto Univ.) / Shunichi Azuma(Osaka Univ.) / Koji Ishii(Hitachi) / Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(CRIEPI) / Tomoya Tandai(Osaka Univ.) |
| Assistant | Mai Ohta(Fukuoka Univ.) / Teppei Oyama(Fujitsu Lab.) / Kentaro Kobayashi(Nagoya Univ.) / Shinya Kawano(NTT) / Yuki Katsumata(NTT DOCOMO) / Yu Nakayama(Tokyo Univ. of Agri. and Tech.) / Akira Uchiyama(Osaka Univ.) / SHAN LIN(NICT) / Masaki Ogura(Osaka Univ.) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) |
| Paper Information | |
| Registration To | 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 / Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Zero-forcing based Multi-user MIMO Coordinated with User-wise Joint Transmit-receive Diversity |
| Sub Title (in English) | |
| Keyword(1) | Multi-user MIMO multiplexing |
| Keyword(2) | joint transmit-receive diversity |
| Keyword(3) | zero-forcing |
| Keyword(4) | |
| 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 | 2020-07-08 |
| Paper # | RCS2020-65 |
| Volume (vol) | vol.120 |
| Number (no) | RCS-89 |
| Page | pp.pp.43-48(RCS), |
| #Pages | 6 |
| Date of Issue | 2020-07-01 (RCS) |