cresig.m

matlab 代码,实现了ITU-T V.32建议的 modem 整体仿真实现。

function x=cresig(N)
s=rand(1,N);
for i=1:N,
    if(s(i)>0.5),
        x(i)=sqrt(2);
    else x(i)=0;
    end;
end;

for i=1:length(y(1,:)),
y(i)=sum(y(:,i));
end;
y=y(:);
y=y';
t=1:length(y);
figure;
plot(t,y);

y(i,:)=conv(a(i),h);

for i=1;(N+1)*8,
y(i)=sum(y(:,i));
end;

er=0;
for i=1:(N-60)/4,
    if(s(i)~=x(i))
        er=er+1;
    end;   
end;
disp