摘要
LDPC码作为一种新的接近香农极限的信道编码方式,引起了广泛的注意。本文在总结出LDPC码校验矩阵的初等变换环路不变性和环路长度性质的基础上,提出了一种基于均匀环路的校验矩阵构造的新思路,而且还可以通过校验矩阵的矩阵初等变换得到其校验矩阵簇,在该簇中可以挑选编码复杂度低的LDPC码用在实际传输中。
As a new channel coding method near to Shannon limit, LDPC code causes general attention. This article presents a new method for check matrix construction based on cycle-average, which also gives invariability of elementary transformation and the property of cycle length. We can get the check matrix cluster through matrix elementary transformation, so the lower coding complexity and higher error-correction performance LDPC code can be selected from the check matrix cluster.
出处
《信号处理》
CSCD
北大核心
2007年第2期288-292,共5页
Journal of Signal Processing
关键词
LDPC码
均匀环路
校验矩阵簇
初等变换
环路不变
LDPC code
cycle-average
check matrix cluster
elementary transformation
cycle invariability