?? qam_mod.m
字號(hào):
function X = QAM_Mod(x,Nbits);% X = QAM_Mod(x,Nbits);%Lx = length(x);i = x(1:2:Lx);q = x(2:2:Lx);for n = 1:Lx/2, i(n) = GrayCoding(i(n),Nbits); q(n) = GrayCoding(q(n),Nbits);end;Levels = 2^Nbits;i = i - (Levels-1)/2;q = q - (Levels-1)/2;X = i + sqrt(-1)*q;% scaling for uniform bit distributionScale = 1./[0.7071; 1.5811; 3.2404; 6.5192];X = X*Scale(Nbits);
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