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 the matlab source code is divided into several versions, small folder in the support of a small sparse matrix, large folder in the support of a larger sparse matrix.