| Presentation | 2010-03-04 User Selection Algorithm Considering Reliability of CSIT for MU-MIMO Systems Using Zero-Forcing Beamforming Jun YAMABAYASHI, Chikara OHTA, Hisashi TAMAKI, Megumi KANEKO, Kazunori HAYASHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a user selection algorithm for multi-user multiple input multiple output (MU-MIMO) system using Zero-Forcing Beamforming (ZFBF). A base station (BS) employs the channel response between antennas of the BS and those of mobile stations (MS) for adjusting transmission weights. The BS gets the channel response by, for example, receiving feedbacks from MSs. Because the channel response varies over time, it involves the error margin and cannot be reliable as time passes by. When responses of channels with the error margin are used for selecting users and adjusting transmission weights by the BS, qualities of channels reduce as orthogonality of channels is lost and the interference between users increases. When MSs frequently give feedbacks of the channel response to the BS, the overhead in the uplink control increases. In this paper we proposed a user selection algorithm which employs a metric representing reliability of the channel response for balancing the sum rate capacity with the feedback frequency. The simulation results display that the proposed algorithm achieves larger sum rate capacity with lower feedback frequency than a conventional algorithm. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | MU-MIMO / user selection / feedback / reliability |
| Paper # | NS2009-171 |
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| Committee | NS |
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| Conference Date | 2010/2/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Network Systems(NS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | User Selection Algorithm Considering Reliability of CSIT for MU-MIMO Systems Using Zero-Forcing Beamforming |
| Sub Title (in English) | |
| Keyword(1) | MU-MIMO |
| Keyword(2) | user selection |
| Keyword(3) | feedback |
| Keyword(4) | reliability |
| 1st Author's Name | Jun YAMABAYASHI |
| 1st Author's Affiliation | Graduate School of Engineering, Kobe University() |
| 2nd Author's Name | Chikara OHTA |
| 2nd Author's Affiliation | Graduate School of Engineering, Kobe University |
| 3rd Author's Name | Hisashi TAMAKI |
| 3rd Author's Affiliation | Graduate School of Engineering, Kobe University |
| 4th Author's Name | Megumi KANEKO |
| 4th Author's Affiliation | Graduate School of Informatics, Kyoto University |
| 5th Author's Name | Kazunori HAYASHI |
| 5th Author's Affiliation | Graduate School of Informatics, Kyoto University |
| Date | 2010-03-04 |
| Paper # | NS2009-171 |
| Volume (vol) | vol.109 |
| Number (no) | 448 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |