GA.c：Density Evolution with Gaussian Approximation for Regular LDPC codes.原创，对应Chung的paper。-

LDPC的密度演化算法，C++写的，执行速度很快。-LDPC density evolution algorithm, C++ written in the implementation of the fast.

介绍了LDPC编码中的PEG算法和DE(Density Evolution)算法。(The PEG algorithm and DE (Density Evolution) algorithm in LDPC coding are introduced.)

着重对极化码编码时涉及的信道选择技术进行展开研究。在二进制删除信道(BEC)环境下,利用Bhattacharyya参数分别从信道转移概率和码长的两方面说明对信道选择的影响。(This paper focuses on the channel selection technology in polarization code coding. In the binary deleted channel (BEC) environment, Bhattacharyya parameters are u