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

使用malab完成turbo码的编译码，在给定生成多项式、交织映射表和删余选择的情况下进行turbo编码-Use malab complete turbo code encoding and decoding, in a given generator polynomial, interleaving mapping table and the deletion of the circumstances under which I choose turbo coding

利用MATLAB开发一个N=5的M序列发生器的仿真程序，其本原多项式为g(x)=1+x^2+x^5.-Use MATLAB to develop a N = 5 M-sequence generator simulation program, its primitive polynomial g (x) = 1+x ^ 2+x ^ 5.