| Presentation | 2006-05-18 Random Beamforming Using Power Allocation in Downlink Multiantenna Transmission Yuki TSUCHIYA, Tomoaki OHTSUKI, Toshinobu KANEKO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Random unitary beamforming is known to reduce the amount of feedback information in multiuser diversity techniques with multi-antenna downlink transmission. In MIMO systems, system capacity is also improved by allocating power among streams optimally. If we use eigen-mode transmission, water-filling theory is an optimal scheme for maximizing the system capacity. But water-filling theory can not get optimal power allocation in the presence of interference between streams. To solve this probrem, it was reported that the power of excess SINK is used to the improvement of the system capacity of the another stream. In random unitary beamforming, transmitter has only partial channel state information of each receiver. Thus, it is difficult to use conventional power allocation methods. In this paper, we propose new scheduling algorithm with power allocation for downlink random unitary beamforming that improves system capacity without full channel state information. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Random Beamforming / Multiuser Diversity / Power Allocation / AMC |
| Paper # | RCS2006-18 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2006/5/11(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| 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) | Random Beamforming Using Power Allocation in Downlink Multiantenna Transmission |
| Sub Title (in English) | |
| Keyword(1) | Random Beamforming |
| Keyword(2) | Multiuser Diversity |
| Keyword(3) | Power Allocation |
| Keyword(4) | AMC |
| 1st Author's Name | Yuki TSUCHIYA |
| 1st Author's Affiliation | Graduate School of Science and Technology, Tokyo University of Science() |
| 2nd Author's Name | Tomoaki OHTSUKI |
| 2nd Author's Affiliation | Faculty School of Science and Technology, Keio University |
| 3rd Author's Name | Toshinobu KANEKO |
| 3rd Author's Affiliation | Graduate School of Science and Technology, Tokyo University of Science |
| Date | 2006-05-18 |
| Paper # | RCS2006-18 |
| Volume (vol) | vol.106 |
| Number (no) | 43 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |