Adaptive limited feedback for MU-MIMO system

被引：0
|
作者：
Wu, You-Long [1 ]
Luo, Han-Wen [1 ]
Liu, Wei [1 ]
Ding, Ming [1 ]
Wang, Hailong [1 ]
机构：
[1] School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
来源：
Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2011年 / 45卷 / 03期
关键词：
Communication channels (information theory) - Telecommunication repeaters - Codes (symbols) - MIMO systems - Feedback control;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The limited feedback in multi-user Multiple-Input Multiple-Output (MU-MIMO) 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 low-SNR users so as to improve the feedback efficiency. Simulation results and analysis show that the proposed scheme is easy-to-implement and can enhance the throughput with no additional feedback overhead.
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页码：313 / 316
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