ofdm_main.m

OFDM系统在COST207信道下的多径仿真

% File Name:OFDM_main.m

SNR=0:2:12;
for i=1:length(SNR);
    simu_OFDM_ber(i)=OFDM_bpsk(SNR(i));
end                                               
figure(2);
%semilogy(SNR,simu_OFDM_ber)
%hold on
%************理论值的差错概率********************
SNRindb=0:0.2:12;
for i=1:length(SNRindb)
    SNR2=10^(SNRindb(i)/10);
    theo_err_prb(i)=Qfunc(sqrt(4*SNR2)/2);
end;
%*******************end of print 理论值的差错概率********************
%************仿真值的差错概率********************
subplot(1,2,1);
semilogy(SNR,simu_OFDM_ber,'b-');
hold on
plot(SNR,simu_OFDM_ber,'b-');
grid on
xlabel('SNR in db');
ylabel('Prob of  Err');
legend('Simulation');
title('ber  of Simulation');
%******************
subplot(1,2,2);
semilogy(SNR2,theo_err_prb,'r-');
hold on
plot(SNRindb,theo_err_prb,'r-');
hold on
axis([0  12   0.0001   1])
xlabel('SNR in db');
ylabel('Prob of  Err');
legend('theory');
title('ber  of theory');

grid on
%***********************
%***********************理论曲线和仿真曲线的比较***********************
figure(3)
semilogy(SNR,simu_OFDM_ber,'b',SNRindb,theo_err_prb,'r');
hold on
plot(SNR,simu_OFDM_ber,'b-',SNRindb,theo_err_prb,'r-');
axis([0  12   0.0001   1])
xlabel('SNR in db');
ylabel('Prob of  Err');
title('ber  of simulation and theory');
legend('Simulation of error prb','theory of error prb');

%*******************end of print 仿真值和理论值的差错概率********************
%end of script file