| Presentation | 2021-11-11 A recursive solution of joint transmit-receive diversity weight vectors Fumiyuki Adachi, Ryo Takahashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Optimal joint transmit-receive diversity (JTRD) is a type of multi-input multi-output (MIMO) spatial diversity technique and is designed to maximize the composite channel gain. A set of its transmit and receive diversity weight vectors is a solution of eigenequation or is derived by the singular value decomposition of MIMO. In this paper, instead of solving eigenequations, a new method to obtain JTRD weight vectors by recursive equations is proposed. In general, the number of base station (BS) antennas is much larger than that of user. The proposed recursive method does not require solving large-scale eigenequations and therefore, can be practical. First, recursive equations to be used either BS side or user side are formulated. Also presented is a computationally efficient method for obtaining JTRD weight vector at BS side. Firstly, BS obtains the user side JTRD weight vector (which is much smaller vector size than BS side weight vector) by using recursive equation and then, transforms it to BS side JTRD weight vector. It is confirmed by computer simulation assuming Rayleigh fading MIMO channel that the proposed recursive method can obtain the JTRD weight vectors by only 4 to 5 times weight updating according to the recursive equations and can achieve the channel capacity close to the optimal JTRD. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Joint transmit-receive diversity / eigenequation / recursive equation / MIMO channel |
| Paper # | RCS2021-161 |
| Date of Issue | 2021-11-03 (RCS) |
| Conference Information | |
| Committee | AP / RCS |
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| Conference Date | 2021/11/10(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | NBC-Bekkan (Nagasaki) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. |
| Chair | Hiroshi Yamada(Niigata Univ.) / Eiji Okamoto(Nagoya Inst. of Tech.) |
| Vice Chair | Mitoshi Fujimoto(Fukui Univ) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) |
| Secretary | Mitoshi Fujimoto(NTT DOCOMO) / Toshihiko Nishimura(National Defense Academy) / Tomoya Tandai(NEC) / Fumihide Kojima(Panasonic) |
| Assistant | Dr. Kim(Niigata 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 Antennas and Propagation / 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) | A recursive solution of joint transmit-receive diversity weight vectors |
| Sub Title (in English) | |
| Keyword(1) | Joint transmit-receive diversity |
| Keyword(2) | eigenequation |
| Keyword(3) | recursive equation |
| Keyword(4) | MIMO channel |
| 1st Author's Name | Fumiyuki Adachi |
| 1st Author's Affiliation | Tohoku University(Tohoku U.) |
| 2nd Author's Name | Ryo Takahashi |
| 2nd Author's Affiliation | Tohoku University(Tohoku U.) |
| Date | 2021-11-11 |
| Paper # | RCS2021-161 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-234 |
| Page | pp.pp.98-103(RCS), |
| #Pages | 6 |
| Date of Issue | 2021-11-03 (RCS) |