Efficient Limited Feedback for MIMO-Relay Systems

被引：3
|
作者：
Wu, Youlong [1 ]
Luo, Hanwen [1 ]
Ding, Ming [1 ]
Zou, Jun [1 ]
Li, Xiuna [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Elect & Elect Engn, Shanghai 200240, Peoples R China
来源：
IEEE COMMUNICATIONS LETTERS | 2011年 / 15卷 / 02期
关键词：
MIMO; relay; feedback; phase; NETWORKS; CHANNELS;
D O I：
10.1109/LCOMM.2010.121310.101613
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this letter, the limited feedback scheme in MIMO-Relay systems is considered. We propose a new strategy that optimizes the allocation of feedback bits between channel direction information (CDI) and phase information (PI) for multi-relay systems under the total number of feedback bits constraint. The proposed scheme eventually trades off some CDI bits for PI feedback to diminish the phase ambiguity. Simulation results show that compared to the conventional and the 1-bit PI feedback methods, the proposed scheme remarkably improves the system performance without increasing the feedback overhead.
引用
收藏
页码：181 / 183
页数：3
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