LDPC码的和积算法，码长可以任意，输出多项式即可，译码输出软信息-Sum-product algorithm for LDPC codes, code length can be arbitrary, the output polynomials can be, decoder outputs soft information

LDPC码译码器，采用BCJR算法，效验矩阵为1000*500.MATLAB代码2010a运行通过-LDPC code decoder, using the BCJR algorithm, well-tested code matrix is ​ ​ 1000* 500.MATLAB run through 2010a

实现了符合NR标准的LDPC，包括base graph 1 和 base graph 2(NR LDPC encoder+decoder ; base graph 1 and base graph 2; matlab)