ldpc码中，再生成H矩阵时，检测4 .6 .8环的快速方法

本程序可检验所设计的LDPC码中的4环个数。LDPC码中的4环决定LDPC码的解码算法是否能够快速收敛，见程序前言中的参考文献。 LDPC码为高性能信道纠错码，已被DVB-s2和IEEE802.16e采纳。-This procedure can be designed to test the LDPC code in ring number 4. LDPC code of 4 Central decision LDPC code decoding algorithm is able to f

Flexible construction of girth-six QC-LDPC Codes-The program constructs girth-six QC-LDPC codes given row-weight,k, column-weight,j, and sub-matrix size,m. The obtained parity-check matrix is stored in H. The construction has flexibility in that j,k

Construct the short length of QC LDPC codes without girth 4 and girth 6-The Program to construct the short length of QC LDPC codes without girth 4 and girth 6 Copyright (C) Yang XIAO, Jun FAN, BJTU, July 26, 2007, E-Mail: yxiao@bjtu.edu.cn.

IT++中LDPC码的生成，在VS2010和IT++4.2版本下编译通过-Generate some example LDPC codes