| Presentation | 2013-06-20 Base Station Cooperative Multiuser MIMO Using Block-diagonalized Random Beamforming with Online Update Nobuhide NONAKA, Yuichi KAKISHIMA, Kenichi HIGUCHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | MIMO / Multiuser MIMO / Base station cooperation / Random beamforming |
| Paper # | RCS2013-49 |
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| Committee | RCS |
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| Conference Date | 2013/6/13(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| 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 |
| 1st Author's Name | Nobuhide NONAKA |
| 1st Author's Affiliation | Department of Electrical Engineering, Graduate School of Science and Technology, Tokyo University of Science() |
| 2nd Author's Name | Yuichi KAKISHIMA |
| 2nd Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| 3rd Author's Name | Kenichi HIGUCHI |
| 3rd Author's Affiliation | Department of Electrical Engineering, Graduate School of Science and Technology, Tokyo University of Science |
| Date | 2013-06-20 |
| Paper # | RCS2013-49 |
| Volume (vol) | vol.113 |
| Number (no) | 93 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |