v32_antimapping.m

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

function[O4,O3,O2,O1]=v32_antimapping(Re,Im);
for k=1:length(Re)
if Re(k)=-1&&Im(k)=-1
    O4(k)==0;O3(k)==0;O2(k)==0;O1(k)==0;
end
if Re(k)=-3&&Im(k)=-1
    O4(k)==1;O3(k)==0;O2(k)==0;O1(k)==0;
end
if Re(k)=-1&&Im(k)=-3
    O4(k)==0;O3(k)==1;O2(k)==0;O1(k)==0;
end
if Re(k)=-3&&Im(k)=-3
    O4(k)==1;O3(k)==1;O2(k)==0;O1(k)==0;
end
if Re(k)=1&&Im(k)=-1
   O4(k)==0;O3(k)==0;O2(k)==1;O1(k)==0;
end
if Re(k)=1&&Im(k)=-3
  O4(k)==1;O3(k)==0;O2(k)==1;O1(k)==0;
end
if Re(k)=3&&Im(k)=-1
   O4(k)==0;O3(k)==1;O2(k)==1;O1(k)==0;
end
if Re(k)=3&&Im(k)=-3
   O4(k)==1;O3(k)==1;O2(k)==1;O1(k)==0;
end
if Re(k)=-1&&Im(k)=1
    O4(k)==1;O3(k)==1;O2(k)==1;O1(k)==0;
end
if Re(k)=-1&&Im(k)=3
     O4(k)==1;O3(k)==0;O2(k)==0;O1(k)==1;
end
if Re(k)=-3&&Im(k)=1
    O4(k)==0;O3(k)==1;O2(k)==0;O1(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