| Presentation | 2012-03-08 Experimental Evaluation on 4-by-2 MU-MIMO Achieving 1 Gbps Throughput Considering CSI Feedback Quantization in LTE-Advanced Downlink 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 experimental results on the throughput for 4-by-2 multi-user (MU)-MIMO applying extended channel state information (CSI) feedback based on eigenvalue decomposition (EVD) in the LTE-Advanced downlink considering the influence of the number of CSI feedback quantization bits using the implemented LTE-Advanced transceiver. The results of the laboratory experiment show that, in a correlated antenna scenario assuming cellular environments with correlated base station (BS) antennas, the throughput performance for Rank-4 MU-MIMO is relatively robust against the number of CSI feedback quantization bits. Meanwhile, in a non-correlated antenna scenario assuming indoor/small cell environments with non-correlated BS antennas, we clarify that the number of quantization bits of 9 or more is clearly required to obtain sufficient throughput gain of Rank-4 MU-MIMO. The results also show that the achievable throughput for Rank-2 MU-MIMO and that for single user (SU)-MIMO are robust against the CSI feedback quantization. Furthermore, we confirm that same tendency is obtained in a indoor real propagation environment. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LTE-Advanced / OFDMA / multi-user MIMO / CSI feedback / quantization / experiment |
| Paper # | RCS2011-341 |
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| Committee | RCS |
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| Conference Date | 2012/2/29(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 Evaluation on 4-by-2 MU-MIMO Achieving 1 Gbps Throughput Considering CSI Feedback Quantization in LTE-Advanced Downlink |
| Sub Title (in English) | |
| Keyword(1) | LTE-Advanced |
| Keyword(2) | OFDMA |
| Keyword(3) | multi-user MIMO |
| Keyword(4) | CSI feedback |
| Keyword(5) | quantization |
| Keyword(6) | experiment |
| 1st Author's Name | Yuichi Kakishima |
| 1st Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC.() |
| 2nd Author's Name | Teruo Kawamura |
| 2nd Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| 3rd Author's Name | Yoshihisa Kishiyama |
| 3rd Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| 4th Author's Name | Hidekazu Taoka |
| 4th Author's Affiliation | DOCOMO Communications Laboratories Europe, GmbH |
| 5th Author's Name | Hidehiro Andoh |
| 5th Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| Date | 2012-03-08 |
| Paper # | RCS2011-341 |
| Volume (vol) | vol.111 |
| Number (no) | 451 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |