mapper2.m

R. Lin and A.P. Petropulu, 揂 New Wireless Medium Access Protocol Based On Cooperation,擨EEE Trans. on

function [x]=mapper(y,C)

% N=4^C   (for N-QAM)

x=[];

re=real(y);
im=imag(y);

for ii=1:C
    
    x=[x; sign(re)];
    x=[x; sign(im)];
    re=re-sign(re).*2^(C-ii);
    im=im-sign(im).*2^(C-ii);  

 
end