Belief-Propagation-Approximated Decoding of Low-Density Parity-Check Codes

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Belief-Propagation-Approximated Decoding of

Low-Density Parity-Check Codes

SONG Hui-shi;ZHANG Ping

【期刊名称】《中国邮电高校学报（英文版）》【年(卷),期】2004(011)001

【摘要】In this paper, we propose a new reduced-complexity decoding algorithm of Low-Density Parity-Check (LDPC) codes, called Belief-Propagation-Approximated (BPA) algorithm, which utilizes the idea of normalization and translates approximately the intricate nonlinear operation in the check nodes of the original BP algorithm to only one operation of looking up the table. The normalization factors can be obtained by simulation, or theoretically. Simulation results demonstrate that BPA algorithm exhibits fairly satisfactory bit error performance on the Additive White Gaussian Noise (AWGN) channel. 【总页数】5页(24-28)

【关键词】LDPC codes;BPA algorithm;normalization 【作者】SONG Hui-shi;ZHANG Ping

【作者单位】School of Telecommunication Engineering, Beijing University of Posts and Telecommunications. Beijing 100876, P. R. China;School of Telecommunication Engineering, Beijing University of Posts and Telecommunications. Beijing 100876, P. R. China 【正文语种】中文

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