ldpc的编解码，压缩文件有密码 源码重复或已经存在 -ldpc encoding and LDPC decoding，Compressed files have passwords，Source repeated or already exists

程序文件夹中包含对LDPC最佳解码算法实现程序,分为两个子文件夹,一个为源程序,一个为可执行程序-the best decoding algrithm for LDPC,the rar including source code and exe.

LDPC码不同译码算法对比。码长512，码率1/2.-LDPC code decoding algorithm comparison. Code length of 512, a rate 1/2.

LDPC编码中的BP算法，已知校验阵H,先验证是否有4环，并实现随机生成信息序列编码并解码。-BP LDPC coding algorithm, known check matrix H, first verify whether there are four rings, and to achieve a randomly generated sequence information encoding and decoding.