摘要
该文分析了影响有限长低密度校验(LDPC)码性能的主要因素,在此基础上从度分布参数的优选为起点,结合改进的循序边增长(PEG)算法构造出初步的校验矩阵,提出一种实用的编码优化算法对该校验矩阵进一步优化,最终得到错误平底低且编码复杂度准线性的有限长不规则LDPC码。该优化方法可以容易地推广到一般的信道条件下。
The main influence for the performance of finite length Low-Density Parity-Check(LDPC) codes is analyzed. According to optimum choice for degree distribution, a check matrix is constructed with improved Progressive-Edge-Growth (PEG) algorithm. A practical efficient encoding algorithm is proposed to optimize the check matrix. A finite length irregular LDPC code with low error-floor performance and approximate linear encoding complexity is obtained. This optimization method can be easily extended to general communication channels.
出处
《电子与信息学报》
EI
CSCD
北大核心
2008年第3期600-603,共4页
Journal of Electronics & Information Technology
关键词
有限长LDPC码
错误平底
边循序增长(PEG)算法
Finite length Low-Density Parity-Check (LDPC) codes
Error-floor
Improved Progressive- Edge-Growth (PEG) algorithm