Alternating Direction Method of Multipliers LDPC Penalized Decoding Algorithm Based on Variable Node Update

作者：He, Wenwu; Xia, Qiaoqiao^*; Zou, Lian

来源：JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY, 2018, 40(1): 95-101.

DOI：10.11999/JEIT170358

• Alternating direction method of multiplier (ADMM)
• Alternating direction method of multipliers
• Decoding algorithm
• Decoding performance
• LDPC
• Penalty function
• Performance improvements
• Variable node update

The LDPC decoding algorithm with improved penalty function can improve the performance of decoding algorithm based on Alternating Direction Method of Multipliers (ADMM), but it has too many parameters to be optimized and the performance improvement is limited. For this problem, by comparing it with other decoding algorithms with penalty function, it is found that the difference between them is only the update rules of variable nodes in the decoding algorithm. Therefore, a new update method for variable nodes is proposed in this paper to reduce the number of parameters and improve the decoding performance. The simulation results show that, compared with the original decoding algorithm, the decoding algorithm in this paper reduces the parameters which need to be optimized, in addition, the average number of iterations of the algorithm is less and the algorithm can achieve about 0.1 dB performance improvement.

• 出版日期2018
• 单位华中师范大学