demapping.asv

就是自适应的一写程序

function signal_out=demapping(signal_in)
N=length(signal_in);
signal_out=zeros(N,2);
theta=angle(signal_in);
for m=1:N
    if    theta(m)==pi/4;  
            signal_out(m,:)=[0,0];
    elseif   theta(m)==3*pi/4;
            signal_out(m,:)=[0,1];
    elseif   theta(m)==-3*pi/4;
            signal_out(m,:)=[1,1];
    elseif   theta(m)==-pi/4;
            signal_out(m,:)=[1,0];
    end
end