基于LDPC的联合调度译码算法的研究  

Research on joint scheduling decoding algorithm based on LDPC

作　　者：纪元法[1,2,3] 邓震威 孙希延 严素清[1,2] JI Yuanfa;DENG Zhenwei;SUN Xiyan;YAN Suqing(Guangxi Key Laboratory of Precision Navigation Technology and Application,Guilin University of Electronic Technology,Guilin 541004,China;School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;National&Local Joint Engineering Research Center of Satellite Navigation Positioning and Location Service,Guilin 541004,China;GUET-Nanning E-Tech Research Institute Co.,Ltd.,Nanning 530031,China)

机构地区：[1]桂林电子科技大学广西精密导航技术与应用重点实验室,广西桂林541004 [2]桂林电子科技大学信息与通信学院,广西桂林541004 [3]卫星导航定位与位置服务国家地方联合工程研究中心,广西桂林541004 [4]南宁桂电电子科技研究院有限公司,广西南宁530031

出　　处：《现代电子技术》2023年第17期1-5,共5页Modern Electronics Technique

基　　金：广西科技厅项目(桂科AA20302022);国家自然科学基金项目(62061010);国家自然科学基金项目(62161007);广西八桂学者项目;桂林市科技项目(20210222-1);广西高校中青年教师科研基础能力提升项目(2022KY0181);桂林电子科技大学研究生教育创新计划资助项目(2022YCXS046)。

摘　　要：针对低密度奇偶校验码(LDPC)动态调度中存在的贪婪性以及非动态调度中译码性能低的问题,提出基于动态调度与非动态调度的联合优化算法(ELNWRBP)。该算法合理分配动态调度算法(NWRBP)和非动态调度算法(LBP)权重占比。NWRBP算法提高译码性能,而LBP算法缓解了动态调度中的“贪婪性”问题。两种调度算法联合使用,在译码性能和译码效率之间达到一种平衡。仿真结果和数据表明:在码字为(1296,1/2)、误码率为3×10^(-5)的条件下,相比于NWRBP算法和LBP算法的性能分别提高了约0.15 dB和0.45 dB。In view of the greed in dynamic scheduling of low density parity check(LDPC)and the low decoding performance in non⁃dynamic scheduling,a joint optimization algorithm ELNWRBP(enhanced layered⁃NWRBP)based on dynamic scheduling and non⁃dynamic scheduling is proposed.In this algorithm,the weights of dynamic scheduling algorithm NWRBP(node⁃wise residual BP)and non⁃dynamic scheduling algorithm LBP(layered BP)are allocated reasonably.The NWRBP algorithm is to improve the decoding performance,while LBP algorithm is to alleviate the greed in dynamic scheduling.The combination of the two scheduling algorithms achieves a balance between decoding performance and decoding efficiency.The simulation results and data show that,in comparison with the NWRBP algorithm and the LBP algorithm,the performance of the proposed algorithm is improved by about 0.15 dB and 0.45 dB,respectively,under the condition that the code word is(1296,12)and the bit error rate(BER)is 3×10^(-5).

关 键 词：低密度奇偶校验码 动态调度 非动态调度 联合优化 贪婪性 误码率 

分 类 号：TN911.22-34[电子电信—通信与信息系统]