Parameter-free ℓ_p-Box Decoding of LDPC Codes

11/29/2017

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by   Qiong Wu, et al.

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The Alternating Direction Method of Multipliers (ADMM) decoding of Low Density Parity Check (LDPC) codes has received many attentions due to its excellent performance at the error floor region. In this paper, we develop a parameter-free decoder based on Linear Program (LP) decoding by replacing the binary constraint with the intersection of a box and an ℓ_p sphere. An efficient ℓ_2-box ADMM is designed to handle this model in a distributed fashion. Numerical experiments demonstrates that our decoder attains better adaptability to different Signal-to-Noise Ratio and channels.