| Presentation | 2017-06-21 Interference Minimization Through Power Allocation for MU-MIMO Under Time-Varying Channels Ilmiawan Shubhi, Hidekazu Murata, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In a multi-user multiple-input multiple-output (MU-MIMO) system, accurate channel state information is required to set a reliable precoder. Due to the time-varying nature of the channel, however, a mismatch between the precoder and the actual channel can not be avoided. This circumstance causes the signal to be phase-shifted, and the interuser interference arises. To overcome this problem, a recursive power allocation technique based on the predicted interference level is proposed in this paper. First, we extract the Doppler shift information from the pilots sent by the mobile station (MS) to create a predicted channel matrix. After calculating the predicted interference level for all users, recursive power allocation is conducted to minimize the interuser interference at the MSs. Computer simulation shows that our proposed technique enables the time varying MU-MIMO transmission even when the precoder matrix is not frequently updated. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Doppler spreadMU-MIMOPower allocationTime-varying channel |
| Paper # | RCS2017-51 |
| Date of Issue | 2017-06-14 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2017/6/21(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Ishigaki Shoukou Kaikan |
| 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. |
| Chair | Tomoaki Otsuki(Keio Univ.) |
| Vice Chair | Eisuke Fukuda(Fujitsu Labs.) / Satoshi Suyama(NTT DoCoMo) / Fumiaki Maehara(Waseda Univ.) |
| Secretary | Eisuke Fukuda(Hokkaido Univ.) / Satoshi Suyama(NTT) / Fumiaki Maehara |
| Assistant | Kazushi Muraoka(NTT DOCOMO) / Shinsuke Ibi(Osaka Univ.) / Hiroshi Nishimoto(Mitsubishi Electric) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Interference Minimization Through Power Allocation for MU-MIMO Under Time-Varying Channels |
| Sub Title (in English) | |
| Keyword(1) | Doppler spreadMU-MIMOPower allocationTime-varying channel |
| 1st Author's Name | Ilmiawan Shubhi |
| 1st Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 2nd Author's Name | Hidekazu Murata |
| 2nd Author's Affiliation | Kyoto University(Kyoto Univ.) |
| Date | 2017-06-21 |
| Paper # | RCS2017-51 |
| Volume (vol) | vol.117 |
| Number (no) | RCS-103 |
| Page | pp.pp.7-11(RCS), |
| #Pages | 5 |
| Date of Issue | 2017-06-14 (RCS) |