一种改进的LDPC码译码算法  

A Modified Bit-Flipping Decoding for Low-density Parity-check Codes Based on Weighted Violation

作　　者：韩辉[1,2] 周武旸[1] 董桂强[1] 林娅[2] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,安徽合肥230027 [2]重庆通信学院,重庆400035

出　　处：《通信技术》2009年第11期214-216,共3页Communications Technology

摘　　要：文中提出了一种改进的基于加权错误校验的LDPC码比特反转算法,该算法不需要软信息,译码时采用了设定判决门限的方法,减少了译码过程中的迭代次数和译码复杂度。仿真结果表明:对于高Girth、低码率的LDPC码,该算法达到了比多种利用软信息的比特反转算法更少的迭代次数和更优异的性能。This paper proposes a modified weighted violation-based bit-flipping decoding algorithm for LDPC codes, and no soft information is required for decoding, Futhermore, in order to reduce the average number of iterations and decoding complexity, the threshold of judgement is set. Simulation results show that this modified algorithm could achieve much less number of iterations and better performance as compared with several soft-decision bit-flipping decoding algorithms for LDPC codes with large girth and low code rate.

关 键 词：LDPC码 加权错误校验 比特反转算法 

分 类 号：TN911.22[电子电信—通信与信息系统]