写CRC编解码程序时，整理的文件，压缩文件既有理论说明，也有源代码。源代码格式用C,VHDL,Verilog。-write CRC codec procedures, collating documents, compressed files both theoretical statements, and the active code. Source code format C, VHDL, Verilog.

LDPC码在基于BP (Belief Propagation) 的迭代译码相结合的条件下具有逼近Shannon 限的性能，是继turbo 码后在纠错编码领域又一重大进展。压缩文件中给出了LDPC在高斯信道下的c程序。-LDPC codes based on BP (Belief Propagation) Iterative Decoding of combining conditions with performance approaching Shannon limit on the heel