Improving the Capacity of Limited Feedback Beamforming in Distributed MIMO Systems

Erlin ZENG  Shihua ZHU  Zhimeng ZHONG  Zhenjie FENG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E91-B   No.6   pp.2063-2066
Publication Date: 2008/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.6.2063
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
beamforming,  limited feedback,  distributed antenna systems (DAS),  multiple-input multiple-output (MIMO),  

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Summary: 
In this letter, we analyze the performance of limited feedback beamforming in a distributed antenna system. We propose a novel codebook design scheme to maximize a lower bound of the averaged effective signal-to-noise ratio (SNR), which is a function of the power of the signal and noise, the number of antennas, and the number of total feedback bits for characterizing the quantized channel vector. Simulations verify that the proposed scheme can provide effective capacity improvement.