ldpc码在AWGN信道下的性能仿真。包括geth.m,getG.m,H2G.m,decode.m,BER.m按传统的编码方案编码，生成H矩阵后转化为G矩阵，编码后送入高斯信道。仿真得到BER性能-ldpc codes in the AWGN channel performance simulation. Including geth.m, getG.m, H2G.m, decode.m, BER.m coded according to the traditional encoding sch

Generate random bits, convert to bipolar, corrupt the message by passing through noise and decode using hard decision decoding and calculate BER

编写仿真程序画出(8，1)重复码系统在硬判决译码和软判决译码两种情况下的BER性能曲线（均采用最小距离译码）(Write simulation program, draw (8, 1) repeat code system in the hard decision decoding and soft decision decoding two cases of BER performance curve (both using minimum distance decoding))