| Presentation | 2012-07-19 Experimental Evaluations on User Pair Selection for 4-by-2 MU-MIMO Using AMC with Outer-Loop Threshold Control in LTE-Advanced Downlink Keisuke Saito, Yuichi Kakishima, Teruo Kawamura, Yoshihisa Kishiyama, Hidekazu Taoka, Hidehiro Andoh, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents laboratory experimental results on user pair selection for 4-by-2 multi-user (MU)-MIMO employing minimum mean square error (MMSE)-based precoding to reduce the mutual interference in the LTE-Advanced downlink. The achievable throughput performance employing adaptive modulation and coding (AMC) with outer-loop threshold control based on acknowledgement (ACK) / negative ACK (NACK) feedback signaling in order to compensate for the fluctuation in the measured signal-to-interference plus noise power ratio (SINR) value due to MU-MIMO multiplexing is evaluated using the implemented LTE-Advanced transceivers. Laboratory experimental results show that by performing AMC with outer-loop threshold control, the throughput of 1 Gbps is achieved at the average received signal-to-noise power ratio (SNR) of approximately 30 dB in a correlated antenna configuration scenario. Furthermore, we confirm that angles with approximately 60 degrees between spatially multiplexed users yield a large adaptive beam-forming gain in MU-MIMO. We also show that especially when the angle between spatially multiplexed MSs is narrower or wider than approximately 60 degrees, selecting the user pairs with a large difference in the average received SNR is effective in improving the total throughput. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LTE-Advanced / OFDMA / multi-user MIMO / outer-loop threshold control / experimental evaluation |
| Paper # | RCS2012-79 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2012/7/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| 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) | Experimental Evaluations on User Pair Selection for 4-by-2 MU-MIMO Using AMC with Outer-Loop Threshold Control in LTE-Advanced Downlink |
| Sub Title (in English) | |
| Keyword(1) | LTE-Advanced |
| Keyword(2) | OFDMA |
| Keyword(3) | multi-user MIMO |
| Keyword(4) | outer-loop threshold control |
| Keyword(5) | experimental evaluation |
| 1st Author's Name | Keisuke Saito |
| 1st Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC.() |
| 2nd Author's Name | Yuichi Kakishima |
| 2nd Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| 3rd Author's Name | Teruo Kawamura |
| 3rd Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| 4th Author's Name | Yoshihisa Kishiyama |
| 4th Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| 5th Author's Name | Hidekazu Taoka |
| 5th Author's Affiliation | DOCOMO Communications Laboratories Europe |
| 6th Author's Name | Hidehiro Andoh |
| 6th Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| Date | 2012-07-19 |
| Paper # | RCS2012-79 |
| Volume (vol) | vol.112 |
| Number (no) | 132 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |