Limited Feedback Approach in Beamforming System over Temporally-correlated Channels

Wu Min; Shen Chao; Qiu Zheng-ding

doi:10.3724/SP.J.1146.2008.01504

Volume 31 Issue 10

Dec. 2010

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Wu Min, Shen Chao, Qiu Zheng-ding. Limited Feedback Approach in Beamforming System over Temporally-correlated Channels[J]. Journal of Electronics & Information Technology, 2009, 31(10): 2343-2347. doi: 10.3724/SP.J.1146.2008.01504

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Wu Min, Shen Chao, Qiu Zheng-ding. Limited Feedback Approach in Beamforming System over Temporally-correlated Channels[J]. Journal of Electronics & Information Technology, 2009, 31(10): 2343-2347. doi: 10.3724/SP.J.1146.2008.01504

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Limited Feedback Approach in Beamforming System over Temporally-correlated Channels

doi: 10.3724/SP.J.1146.2008.01504

Received Date: 2008-11-14
Rev Recd Date: 2009-05-29
Publish Date: 2009-10-19

Abstract

Abstract

This paper proposes a new limited feedback approach based on tree-structure codebook. As the temporally-correlation across adjacent frames, the quantized channel vector codeword can be modeled as a first-order finite-state Markov chain. The channel vector of current frame is quantized into son-codeword of the codeword with the most transition probabilities corresponding to the previous frame. The index of the son-codeword is fed back to the transmitter with 1 bit feedback. The link simulation results show that, the proposed approach can significantly improve the BER performance relative to the common approach, and the feedback rate can be reduced under some conditions.

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References(1)

References

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