DocumentCode
1406211
Title
Efficient Limited Feedback for MIMO-Relay Systems
Author
Wu, Youlong ; Luo, Hanwen ; Ding, Ming ; Zou, Jun ; Li, Xiuna
Author_Institution
Sch. of Electron. & Electr. Eng., Shanghai JiaoTong Univerisity, Shanghai, China
Volume
15
Issue
2
fYear
2011
fDate
2/1/2011 12:00:00 AM
Firstpage
181
Lastpage
183
Abstract
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.
Keywords
MIMO communication; feedback; telecommunication network routing; MIMO relay systems; PI feedback; channel direction information; feedback bits constraint; limited feedback; multirelay systems; phase information; MIMO; feedback; phase; relay;
fLanguage
English
Journal_Title
Communications Letters, IEEE
Publisher
ieee
ISSN
1089-7798
Type
jour
DOI
10.1109/LCOMM.2010.121310.101613
Filename
5669629
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