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