Optimization decoding algorithm for LDPC codes

An improved optimization decoding algorithm is proposed for binary low-density parity-check (LDPC) codes under any discrete Gaussian channel. First, through theory analysis and mathematical derivation, the mathematical model is constructed for the decoding problem. Then, the optimization decoding algorithm is demonstrated for the model. Finally, several simulations are carried out on VC6.0 for the algorithm's decoding performance and efficiency and the comparison with other algorithms is made. The results show that the algorithm outperforms the former algorithm on either bit-error rate or decoding efficiency and also outperforms the common min-sum algorithm on bit-error rate. The results are in good agreement with the analysis.