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A Simplified Min-Sum Decoding Algorithm for Non-Binary LDPC Codes

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4 Author(s)
Chung-Li Wang ; LSI Corp., Milpitas, CA, USA ; Xiaoheng Chen ; Zongwang Li ; Shaohua Yang

Non-binary low-density parity-check codes are robust to various channel impairments. However, based on the existing decoding algorithms, the decoder implementations are expensive because of their excessive computational complexity and memory usage. Based on the combinatorial optimization, we present an approximation method for the check node processing. The simulation results demonstrate that our scheme has small performance loss over the additive white Gaussian noise channel and independent Rayleigh fading channel. Furthermore, the proposed reduced-complexity realization provides significant savings on hardware, so it yields a good performance-complexity tradeoff and can be efficiently implemented.

Published in:

Communications, IEEE Transactions on  (Volume:61 ,  Issue: 1 )

Date of Publication:

January 2013

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