基于OMS算法的LDPC译码算法改进  

Improvement of LDPC Decoding Algorithm Based on OMS Algorithm

作　　者：吴少峰 杨春兰 黎德文 WU Shaofeng;YANG Chunlan;LI Dewen(No.722 Research Institute,China State Shipbuilding Corporation Limited,Wuhan 430205)

机构地区：[1]中国船舶集团有限公司第七二二研究所,武汉430205

出　　处：《舰船电子工程》2023年第4期60-63,共4页Ship Electronic Engineering

摘　　要：偏移最小和译码算法(OMS)是一种用于第五代(5G)移动通信的低密度奇偶校验(LDPC)译码算法,论文在OMS算法的基础上提出一种改进OMS译码算法,该算法首先在校验节点更新运算中引入一个乘性因子,其次在更新时用每次迭代更新的偏移因子代替原有的固定的偏移因子。仿真结果表明,所提出的改进OMS算法译码性能优于原OMS算法和NMS算法。The offset minimum sum decoding algorithm(OMS)is a low density parity check(LDPC)decoding algorithm used in the fifth generation(5G)mobile communication.This paper proposes an improved OMS decoding algorithm based on the OMS algorithm.The algorithm firstly introduces a multiplicative factor in the update operation of the check node,and then replaces the original fixed offset factor with the offset factor updated by each iteration during the update.The simulation results show that the decod⁃ing performance of the proposed improved OMS algorithm is better than the original OMS algorithm and NMS algorithm.

关 键 词：LDPC译码 偏移最小和算法 密度进化理论 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]