qam16mod.m

对Vblast—oFdm系统地仿真

function mod_symbols=QAM16Mod(bits_in)

full_len = length(bits_in);
if rem(full_len,4)~=0
    error('Unimplemented modulation');
end

m=1;
for k=-3:2:3
    for l=-3:2:3
        table(m) = (k+j*l)/sqrt(10); % power normalization
        m=m+1;
    end;
end;
table=table([0 1 3 2 4 5 7 6 12 13 15 14 8 9 11 10]+1); % Gray code mapping pattern for 8-PSK symbols
inp=reshape(bits_in,4,full_len/4);
mod_symbols=table([8 4 2 1]*inp+1);