awgnchannal.m

16QAM的调制解调程序

% Intialization
OSF=4;
SNR_dB=20;
%change format
trans_i=transmit_16QAM_i/127/127*0.949*4;
trans_q=transmit_16QAM_q/127/127*0.949*4;
tx=trans_i+trans_q*j;
% AWGN Channel
rx=awgn(tx,SNR_dB-10*log10(OSF),'measured');
rx_i=round(real(rx)/1*127);
rx_q=round(imag(rx)/1*127);