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Efficient Stopping Criterion for Hybrid Weighted Symbol-Flipping Decoding of Nonbinary LDPC Codes

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4 Author(s)
Bing Liu ; Dept. of Commun. Eng., Naval Univ. of Eng., Wuhan, China ; Gaoqi Dou ; Wei Tao ; Jun Gao

A two-stage hybrid iterative decoding algorithm with an efficient stopping criterion for nonbinary low-density parity-check (LDPC) codes is proposed, which combines weighted symbol-flipping (WSF) algorithm and fast Fourier transform q-ary sum-product algorithm (FFT-QSPA). The first WSF decoding would be stopped in advance by analyzing the trend of the number of unsatisfied checks. If the first stage decoding is stopped or failed, the second powerful FFT-QSPA is activated. The proposed decoding with the efficient stopping achieves error performance as good as that of FFT-QSPA with a low complexity, and converges faster than hybrid WSF (HWSF) algorithm.

Published in:

Communications Letters, IEEE  (Volume:15 ,  Issue: 3 )

Date of Publication:

March 2011

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