Impact of Feedback Error on Transmit Beamforming with Finite Rate Feedback

Pengcheng ZHU  Lan TANG  Yan WANG  Xiaohu YOU  

IEICE TRANSACTIONS on Communications   Vol.E90-B    No.9    pp.2600-2604
Publication Date: 2007/09/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.9.2600
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
transmit beamforming,  feedback error,  BER,  

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In this letter, we study the impact of feedback error on transmit beamforming systems with finite rate feedback. The feedback channel is modeled as a uniform symmetric channel. The outage probability, bit error rate (BER), diversity gain, and array gain formulas are given. Both analytical and simulation results show that feedback error with small probability will make the system behave badly at high signal-to-noise ratios (SNR).