环为6的准循环LDPC码构造，使用高斯消去法-construction of LDPC codes with girth 6

实现QC-LDPC码字的cycle的search功能，算法为hill climbing算法，能有效去除QC-LDPC码字里长为4,6,8的环，使得码字有较好纠错的性能-Realization of QC-LDPC codeword cycle of search functions, algorithms for the hill climbing algorithm, can effectively remove the QC-LDPC codeword length of 4,6,8 in

在光通信系统中的低密度奇偶校验码的性能仿真中，利用该软件可以检测校验矩阵中是否含有4环和6环，并且可以检测出4环和6环出现次数最多的点。-Performance Simulation LDPC in an optical communication system, the use of the software can detect whether a check matrix containing 4 and 6 ring ring, and can detect the highest nu