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| Adaptive limited feedback for MUMIMO system |
| WU Youlong,LUO Hanwen,LIU Wei,DING Ming,Wang Hailong |
| (School of Electronic, Information and Electrical Engineering,Shanghai Jiaotong University，Shanghai 200240, China) |
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Abstract The limited feedback in multiuser MultipleInput MultipleOutput (MUMIMO) systems is addressed in this paper. In order to reduce the feedback overhead in the uplink channel, we analyze the relation between user’s feedback bits and rate, deduce the optimal solution for adaptive limited feedback, and propose a suboptimal feedback scheme which is more practical. In this scheme, users choose the feedback bits according to both their channel gains and the average gain of the system. Users with high SNR are assigned with more feedback bits than the lowSNR users so as to improve the feedback efficiency. Simulation results and analysis show that the proposed scheme is easytoimplement and can enhance the throughput with no additional feedback overhead.
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Received: 22 January 2010
Published: 30 March 2011
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| [1] |
LIU Shi-1, DING Ming-1, 2 , LIU Wei-1, LUO Han-Wen-1. Greedy Antenna Selection Algorithm for MIMO Relay System[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2011, 45(07): 1054-1057. |
| [2] |
LI Jun-Fei, YU Hui, LUO Han-Wen, DING Ming. A Multiuser Scheduling Algorithm for MIMO Broadcast Channels with Limited Feedback[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2011, 45(03): 379-0382. |
| [3] |
Lv Jing1,LUO Hanwen1,LIU Wei1,ZHANG Jing2
. A Lowcomplexity User Selection Algorithm for
Multicell MIMO Employing Orthogonal SpaceDivision Multiplexing
[J]. J. Shanghai Jiaotong Univ.(Sci.) , 2010, 44(09): 1266-1270. |
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