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A Modified BP Algorithm for LDPC Decoding Based on Minimum Mean Square Error Criterion

Meng XU, Xincun JI, Jianhui WU, Meng ZHANG

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Summary :

In this paper, a modified Belief Propagation (BP) decoding algorithm for low-density parity check (LDPC) codes based on minimum mean square error (MMSE) criterion is proposed. This modified algorithm uses linear equation to replace the hyperbolic function in the original BP algorithm and optimizes the linear approximation error based on MMSE criterion. As a result, compared with the standard BP algorithm the computational complexity is reduced significantly as the modified algorithm requires only addition operations to implement. Besides that simulation results show our modified algorithm can achieve an error performance very close to the BP algorithm on the additive white Gaussian noise channel.

Publication
IEICE TRANSACTIONS on Communications Vol.E93-B No.5 pp.1256-1259
Publication Date
2010/05/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E93.B.1256
Type of Manuscript
LETTER
Category
Fundamental Theories for Communications

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