Multi-target Symbol Window Decoding Algorithm for SC-LDPC Codes Against Error Propagation
GE Qiwei
ZHOU Hua
LI Zijie
Abstract：The Spatially Coupled Low-Density Parity-Check(SC-LDPC)codes have the excellent property of threshold satu-ration,and the check matrix only has non-zero symbol in the diagonal band,and the diagonal band region is periodic and semi-infi-nite.This structure is suitable for window decoding.Aiming at the problem of high complexity of window decoding,a multi-target symbol window decoding algorithm is proposed in this paper.After decoding of each window,the number of target symbol output and the step size of window sliding are increased.Simulation shows that the algorithm can greatly reduce the complexity by more than 40%.But multi-target symbol window decoding caused by a lack of information matrix iteration,vulnerable to the effects of error propagation.This paper proposes a dynamic parameter tuning algorithm to combat error propagation,previously detected several con-secutive windows failed to correct the output code word,will increase follow-up window iteration limit or window size,the simula-tion shows that the algorithm can effectively reduce the error rate of up to 0.14 dB.
Keywords：spatially coupled LDPC codemulti-target symbolerror propagationdynamic parameter tuning
Publication Date：2024-09-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 2561-2565 )