qpsk.m

QPSK在加性高斯白噪声环境下

echo on
SNRindB1=0:2:10;
SNRindB2=0:0.1:10;
for i=1:length(SNRindB1),
    [pb,ps]=cm_sm32(SNRindB1(i));
    smld_bit_err_prb(i)=pb;
    smld_symbol_err_prb(i)=ps;
    echo off;
end;
echo on;
for i=1:length(SNRindB2),
    SNR=exp(SNRindB2(i)*log(10)/10);
    theo_err_prb(i)=Qfunct(sqrt(2*SNR));
    echo off;
end;
echo on;
semilogy(SNRindB1,smld_bit_err_prb,'*');
hold
semilogy(SNRindB1,smld_symbol_err_prb,'o');
semilogy(SNRindB2,theo_err_prb);