CwMtx has no built-in random number generator, and there is no class function that fills a matrix with random elements.

CwMtx没有内置的随机数生成器，也没有用随机元素填充矩阵的类函数。

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For the importance of the relationship between information and parity, the generator matrix and the parity-check matrix of every code have been discussed.

由于信息码元与校验码元之间关系的重要性，对每一种码的生成矩阵和校验矩阵均进行了讨论。

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These quasi-cyclic LDPC can not only reduce the storage of LDPC generator matrix, but also decrease the encoding complexity efficiently, which is of great significance for the applications.

这些特殊结构的LDPC码不仅可以压缩编译码所需的矩阵储存空间，而且还能有效的降低编码复杂度，这对工程上实现LDPC码的应用具有重要的意义；

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