function y = QAM_Demod(Y,Nbits);% y = QAM_Demod(Y,Nbits);%Ly = length(Y);Levels = 2^Nbits;% rescalingScale = [0.7071;   1.5811;   3.2404;   6.5192];Y = Y*Scale(Nbits);% **** decision slicer ****i = round(real(Y)+(Levels-1)/2);i(i<0) = 0;i(i>(Levels-1)) = Levels-1;q = round(imag(Y)+(Levels-1)/2);q(q<0) = 0;q(q>(Levels-1)) = Levels-1;% **** Gray decoding ****for n = 1:Ly,   i(n) = GrayDecoding(i(n),Nbits);   q(n) = GrayDecoding(q(n),Nbits);end;% **** interleaving ****y = zeros(1,2*Ly);y(1:2:2*Ly) = i;y(2:2:2*Ly) = q;