LDPC码的完整的编译码，本科毕设要求参见标准测试模型，利用自然梯度算法，单径或多径瑞利衰落信道仿真，是国外的成品模型，IDW距离反比加权方法。-Complete codec LDPC code, Undergraduate complete set requirements refer to the standard test models, Use of natural gradient algorithm, Single path or multipath Rayleigh fading channel simulation, Foreign model is finished, IDW inverse distance weighting method.