基于BIBD和循环置换矩阵的LDPC码  

LDPC Code Based on Balanced Incomplete Block Design and Cycle Permutation Matrix

作　　者：焦新泉[1] 陈建军[1] 单彦虎[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室,太原030051

出　　处：《计算机工程》2012年第2期282-283,287,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(60871041)

摘　　要：提出一种基于平衡不完全区组设计(BIBD)和循环置换矩阵的准循环低密度校验码(LDPC)构造方法。根据实际需求,利用BIBD构造相应的模板矩阵,用适合的循环置换矩阵进行扩展。采用该方法构造的LDPC码具有良好的结构和灵活性,该方法在一定范围内可快速方便构造出某一特定码长或码率的准循环LDPC码。仿真结果证明,准循环LDPC码在高斯白噪声信道上采用迭代译码时,具有较优的纠错性能及较低的错误平层。A method to construct a flexible length or rate of quasi-cyclic Low Density Parity Check（LDPC） codes based on Balanced Incomplete Block Design（BIBD） and cycle permutation matrix is proposed.Based on actual demand,the corresponding template matrix is constructed by BIBD method.The template matrix is extended by the appropriate cycle permutation matrix.The quasi-cyclic LDPC codes constructed by the proposed method have a good structure and flexibility.This method improves the efficiency of construction good codes which meet the needs of a practical application.Simulations show that quasi-cyclic LDPC codes constructed by the proposed method perform well over AWGN channels with iterative decoding and have a lower error floor.

关 键 词：平衡不完全区组设计 准循环低密度校验码 循环置换矩阵 模板矩阵 有限域 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]