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Proceedings of the 2nd International Symposium on Information Processing (ISIP 2009)

Huangshan, China, August 21-23, 2009

Editors: Fei Yu, Jian Shu, and Guangxue Yue

AP Catalog Number: AP-PROC-CS-09CN002

ISBN: 978-952-5726-02-2 (Print), 978-952-5726-03-9 (CD-ROM)

Page(s): 79-82

Limited Feedback Based on Tree-structured Codebook for MIMO Systems over Time-varying Channels

Min Wu, Chao Shen, and Zhengding Qiu

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In this paper, we propose a novel limited feedback approach for MIMO systems with transmit beamforming over time-varying channels, where the optimal beamforming vector of the current frame is selected from the son-codewords of the codewords neighboring to previous beamforming codeword. The proposed approach exploits the channel temporal correlation to improve the CSI quantized precise. The simulation results show that the proposed approach can efficiently improve the BER performance relative to the common feedback approach, and the feedback rate can be further reduced under some conditions. Moreover, the effect of Doppler frequency shift on the performance of the proposed approach is analyzed.

Index Terms

MIMO, transmit beamforming, temporal correlation, tree-structured codebook

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