An Improved Decoding Algorithm Based on Minimum Mean Square Error for LDPC Codes

doi:10.13190/jbupt.200705.51.liux

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2007, Vol. 30 ›› Issue (5): 51-54.doi: 10.13190/jbupt.200705.51.liux

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An Improved Decoding Algorithm Based on Minimum Mean Square Error for LDPC Codes

LIU Xiang, WEN Na, XU Yong-tai, LIU Bao-ling

(Wireless Technique Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China)

Received:2006-11-13 Revised:2007-03-28 Online:2007-10-30 Published:2007-10-30
Contact: LIU Xiang

Abstract

Abstract:

An improved decoding algorithm based on minimum mean square error(MMSE) for LDPC codes is proposed. The new algorithm combines processing methods of two modified UMP BP-based algorithms (normalized UMP BP-based algorithm and offset UMP BP-based algorithm) and attains the corresponding normalization factor and offset factor according to MMSE criterion. Simulation results indicate that compared with the two above-mentioned algorithms a gain of 0.03 dB can be achieved at BER of 10-6 with the proposed algorithm when a (3,6) regular LDPC code of code length 1008 and code rate 1/2 is used.

Key words: low-density parity-check codes, minimum mean square error, decoding algorithm

CLC Number:

TN929.53

LIU Xiang, WEN Na, XU Yong-tai, LIU Bao-ling. An Improved Decoding Algorithm Based on Minimum Mean Square Error for LDPC Codes[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(5): 51-54.

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An Improved Decoding Algorithm Based on Minimum Mean Square Error for LDPC Codes

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