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| Presentation | 2020-07-08 14:15 Zero-forcing based Multi-user MIMO Coordinated with User-wise Joint Transmit-receive Diversity Fumiyuki Adachi, Ryo Takahashi (Tohoku Univ.)  RCS2020-65 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | Multi-user MIMO multiplexing / joint transmit-receive diversity / zero-forcing / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 89, RCS2020-65, pp. 43-48, July 2020. | |
| Paper # | RCS2020-65 | |
| Date of Issue | 2020-07-01 (RCS) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | RCS2020-65 |
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| Conference Information | |
| Committee | SR NS SeMI RCC RCS |
| Conference Date | 2020-07-08 - 2020-07-10 |
| 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 |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2020-07-SR-NS-SeMI-RCC-RCS |
| Language | Japanese |
| 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 |
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| 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.) |
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| Speaker | Author-1 |
| Date Time | 2020-07-08 14:15:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2020-65 |
| Volume (vol) | vol.120 |
| Number (no) | no.89 |
| Page | pp.43-48 |
| #Pages | 6 |
| Date of Issue | 2020-07-01 (RCS) |
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