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Performance Improvement of Differential Codebooks with Noisy Feedback Channels

Authors:
Xun Li
Noe Yoon Park
Young Ju Kim

Keywords: Differential codebook, Temporal correlation, Limited feedback.

Abstract:
In this paper, a differential codebook indexing scheme is proposed for limited feedback system over noisy feedback channels. A lot of research has been done for limited feedback system assuming error free feedback. In practical systems, the feedback information experiences noisy feedback channels which cause feedback information partially all totally useless. Prior research about differential precoding focuses on the codebook design criterion which minimize the quantization distortion. The proposed scheme focuses on how to minimize the effect due to feedback errors. The relationship of feedback errors and limited feedback system performance is analyzed in this paper. Using the analytical results, an optimal differential codebook indexing scheme is proposed to improve the system performances when the feedback bits less than 3 bits and exceed 4 bits, respectively. From some selected numerical results, the proposed differential codebook indexing scheme provides non-negligible performance improvements in terms of average bit error rate than the systems without indexing.

Pages: 141 to 145

Copyright: Copyright (c) IARIA, 2012

Publication date: June 24, 2012

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-203-5

Location: Venice, Italy

Dates: from June 24, 2012 to June 29, 2012