中文说明：详细说明：qc—ldpc编码的matlab源码，分为好几个版本，small文件夹里的支持小的稀疏矩阵，large文件夹里的支持较大的稀疏矩阵。test文件为顶层-qc-ldpc,本代码只包含了LDPC码的编码部分，通过校验矩阵得到生成矩阵
English Description：
Description: qc-ldpc encoding matlab source is divided into several versions, small folder support small sparse matrix, large folder support large sparse matrices. test file for the top -qc-ldpc, the code contains the coding portion of LDPC codes only, get through the check matrix generator matrix