关于ldpc码的改进算法，基于校验节点到变量节点的信息，从而实现很好的译码性能，是篇不错的文章-Ldpc yards on the improved algorithm, based on check node to variable node of information, in order to achieve good decoding performance is a good article articles

根据打孔法，依托对各级变量节点进行分类的方式实现各种变速率LDPC码(According to the hole drilling method, variable rate LDPC codes are implemented by classifying the variable nodes at all levels)