正弦波信源编码、译码，循环信道编码.m

以正弦波信号为例

%%%%%%%%%对正弦序列进行BPCM编码，即信源编码
predictor=[0,1];
partition=[-1:0.1:0.9];
codebook=[-1:0.1:1];
t=[0:pi/50:2*pi];
x=2*sin(3*t);%取3个周期，幅度为2的正弦曲线
xinyuancode=dpcmenco(x,codebook,partition,predictor);
decodedx=dpcmdeco(xinyuancode,codebook,predictor);
subplot(2,1,1);
plot(x-decodedx);%原码与译码的差
subplot(2,1,2);
plot(xinyuancode);%编码序列
plot(t,x,t,xinyuancode,'--',t,decodedx,'r');%原码与译码序列

%%%%%%%%%%%%%%%%%%%%%%对信源编码使用循环码进行信道编码
n=7;k=4;
xindaocode=encode(xinyuancode,n,k,'cyclic/decimal');