psk.m

高斯噪声下的8psk误码率检测与理论值比较

            %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
            %   对M=8的PSK系统进行蒙特卡罗仿真   %
            %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clear all
echo off
SNRindB1=0:2:10;
SNRindB2=0:0.1:10;
for i=1:length (SNRindB1),
   [pb , ps]=cm_sm32 (SNRindB1 (i));       %仿真比特和符号误码率
   smld_bit_err_prb (i)=pb;
   smld_symbol_err_prb (i)=ps;
end;
for i=1:length (SNRindB2),
   SNR=exp(SNRindB2(i)*log(10)/10);        %信噪比
   theo_err_prb(i)=2*Qfunct(sqrt(6*SNR)*sin(pi/8))/3;    %理论比特误码率
end;
 %%%%%%%随后绘图曲线%%%%%%%
semilogy (SNRindB1,smld_bit_err_prb,'*');
hold
semilogy (SNRindB1,smld_symbol_err_prb,'O');
semilogy (SNRindB2,theo_err_prb);
grid on
xlabel('Eb/No in dB')
ylabel('error probability')
title('8PSK系统的蒙特卡罗仿真')
%gtext('（注：“—”理论误码率；“*”误比特率；“o”误符号率）')