提高检突发错误能力的LDPC码的构造方法  

Construction of LDPC codes for higher burst-error detecting

作　　者：姚春光[1] 葛新 刘英男[3] 张健 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]中国电子设备系统工程总公司,北京100039 [3]北京大学电子系卫星与无线通信实验室,北京100871

出　　处：《通信学报》2007年第11期111-115,共5页Journal on Communications

摘　　要：当前LDPC码的构造方法都是偏重于提高码的性能、降低编码复杂度2个方面,没有考虑码组之间的汉明距离和汉明距离分布,从而漏检部分突发错误。给出了一种次优的考虑码组汉明距离分布的构造方法,和已有的方法相比,这种方法构造的LDPC码不仅可以检突发长度小于校验矩阵秩的突发错误,并且保持纠随机错误性能不变。The coding of LDPC codes is focused on several aspects： high error-correction, low coding complexity and so on. All the construction methods do not give much consideration on hamming-distance and its distribution because of computation complexity. A suboptimal scheme which is with emphasis on hamming-distance and its distribution was presented. The codes introduced frown this scheme can detect all burst-errors within the length of check matrix＇s rank and has no loss in performance of random-error-correction.

关 键 词：LDPC码 Gilbert界 列相关 列主元高斯消去 

分 类 号：TN911.22[电子电信—通信与信息系统]