v32_mapping.m

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

function[Re,Im]=v32_mapping(I4,I3,I2,I1);
for k=1:length(I4)
if I4(k)==0&&I3(k)==0&&I2(k)==0&&I1(k)==0
    Re(k)=-1;Im(k)=-1;
end
if I4(k)==1&&I3(k)==0&&I2(k)==0&&I1(k)==0
    Re(k)=-3;Im(k)=-1;
end
if I4(k)==0&&I3(k)==1&&I2(k)==0&&I1(k)==0
    Re(k)=-1;Im(k)=-3;
end
if I4(k)==1&&I3(k)==1&&I2(k)==0&&I1(k)==0
    Re(k)=-3;Im(k)=-3;
end
if I4(k)==0&&I3(k)==0&&I2(k)==1&&I1(k)==0
    Re(k)=1;Im(k)=-1;
end
if I4(k)==1&&I3(k)==0&&I2(k)==1&&I1(k)==0
    Re(k)=1;Im(k)=-3;
end
if I4(k)==0&&I3(k)==1&&I2(k)==1&&I1(k)==0
    Re(k)=3;Im(k)=-1;
end
if I4(k)==1&&I3(k)==1&&I2(k)==1&&I1(k)==0
    Re(k)=3;Im(k)=-3;
end
if I4(k)==0&&I3(k)==0&&I2(k)==0&&I1(k)==1
    Re(k)=-1;Im(k)=1;
end
if I4(k)==1&&I3(k)==0&&I2(k)==0&&I1(k)==1
    Re(k)=-1;Im(k)=3;
end
if I4(k)==0&&I3(k)==1&&I2(k)==0&&I1(k)==1
    Re(k)=-3;Im(k)=1;
end
if I4(k)==1&&I3(k)==1&&I2(k)==0&&I1(k)==1
    Re(k)=-3;Im(k)=3;
end
if I4(k)==0&&I3(k)==0&&I2(k)==1&&I1(k)==1
    Re(k)=1;Im(k)=1;
end
if I4(k)==1&&I3(k)==0&&I2(k)==1&&I1(k)==1
    Re(k)=3;Im(k)=1;
end
if I4(k)==0&&I3(k)==1&&I2(k)==1&&I1(k)==1
    Re(k)=1;Im(k)=3;
end
if I4(k)==1&&I3(k)==1&&I2(k)==1&&I1(k)==1
    Re(k)=3;Im(k)=3;
end
end