Efficient Early Termination Criterion for ADMM Penalized LDPC Decoder

Biao WANG  Xiaopeng JIAO  Jianjun MU  Zhongfei WANG  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E101-A   No.3   pp.623-626
Publication Date: 2018/03/01
Online ISSN: 1745-1337
Type of Manuscript: LETTER
Category: Coding Theory
alternating direction method of multipliers,  low-density parity-check codes,  early termination,  penalized decoding,  

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By tracking the changing rate of hard decisions during every two consecutive iterations of the alternating direction method of multipliers (ADMM) penalized decoding, an efficient early termination (ET) criterion is proposed to improve the convergence rate of ADMM penalized decoder for low-density parity-check (LDPC) codes. Compared to the existing ET criterion for ADMM penalized decoding, the proposed method can reduce the average number of iterations significantly at low signal-to-noise ratios with negligible performance degradation.