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| Presentation | 2013-06-20 11:10 Base Station Cooperative Multiuser MIMO Using Block-diagonalized Random Beamforming with Online Update Nobuhide Nonaka (Tokyo Univ. of Science), Yuichi Kakishima (NTT DOCOMO), Kenichi Higuchi (Tokyo Univ. of Science)  RCS2013-49 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper investigates an application of random (opportunistic) beamforming (RB) to the base station (BS) cooperative multiuser multiple-input multiple-output (MIMO) transmission. The proposal is two folds; First, we propose a block-diagonalized unitary RB matrix. The proposed RB matrix achieves better user throughput distribution compared to the pure unitary RB matrix when the average path loss due to distance-dependent loss and shadowing loss is largely different among transmitter antennas which is true in the BS cooperative MIMO. Second, we propose an online update algorithm of RB matrix to improve the throughput compared to the channel-independent RB matrix generation, especially when the number of users is small. Different from the conventional approaches, the proposed method does not increase the overhead of reference signal transmission and the control delay. The simulation results elucidate the effectiveness of the proposed method using block-diagonalized unitary RB matrix with online update in BS cooperative multiuser MIMO scenario. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | MIMO / Multiuser MIMO / Base station cooperation / Random beamforming / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 113, no. 93, RCS2013-49, pp. 73-78, June 2013. | |
| Paper # | RCS2013-49 | |
| Date of Issue | 2013-06-13 (RCS) | |
| ISSN | Print edition: ISSN 0913-5685 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 | RCS2013-49 |
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| Conference Information | |
| Committee | RCS |
| Conference Date | 2013-06-20 - 2013-06-21 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hokkaido Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | First Presentation in IEICE Technical Committee, Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Resource Control, Scheduling, Wireless Communication Systems, etc. |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2013-06-RCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Base Station Cooperative Multiuser MIMO Using Block-diagonalized Random Beamforming with Online Update |
| Sub Title (in English) | |
| Keyword(1) | MIMO |
| Keyword(2) | Multiuser MIMO |
| Keyword(3) | Base station cooperation |
| Keyword(4) | Random beamforming |
| Keyword(5) | |
| Keyword(6) | |
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| Keyword(8) | |
| 1st Author's Name | Nobuhide Nonaka |
| 1st Author's Affiliation | Tokyo University of Science (Tokyo Univ. of Science) |
| 2nd Author's Name | Yuichi Kakishima |
| 2nd Author's Affiliation | NTT DOCOMO, INC. (NTT DOCOMO) |
| 3rd Author's Name | Kenichi Higuchi |
| 3rd Author's Affiliation | Tokyo University of Science (Tokyo Univ. of Science) |
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| Speaker | Author-1 |
| Date Time | 2013-06-20 11:10:00 |
| Presentation Time | 10 minutes |
| Registration for | RCS |
| Paper # | RCS2013-49 |
| Volume (vol) | vol.113 |
| Number (no) | no.93 |
| Page | pp.73-78 |
| #Pages | 6 |
| Date of Issue | 2013-06-13 (RCS) |
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