task2.m

自己做的一个室内无线通信仿真

clear all
SNRindB1=0:1:10;
SNRindB2=0:0.1:10;
for i=1:length(SNRindB1),
	%误码率仿真
    [p result]=smldPe21(SNRindB1(i));
	smld_err_prb(i)=p;
    smld_err_prb1(i)=result(1);
    smld_err_prb2(i)=result(2);
    smld_err_prb3(i)=result(3);
    smld_err_prb4(i)=result(4);
    smld_err_prb5(i)=result(5);
    smld_err_prb6(i)=result(6);
    smld_err_prb7(i)=result(7);    
end
for i=1:length(SNRindB2),
	SNR=exp(SNRindB2(i)*log(10)/10);
	%理论误码率
	theo_err_prb(i)=Qfunct(sqrt(2*SNR));
end
%随后为绘图命令
figure(3)
semilogy(SNRindB1,smld_err_prb1,'*');
hold on
semilogy(SNRindB1,smld_err_prb2,'x');
hold on
semilogy(SNRindB1,smld_err_prb3,'+');
hold on
semilogy(SNRindB1,smld_err_prb4,'v');
hold on
semilogy(SNRindB1,smld_err_prb5,'s');
hold on
semilogy(SNRindB1,smld_err_prb6,'>');
hold on
semilogy(SNRindB1,smld_err_prb7,'<');
hold on
semilogy(SNRindB2,theo_err_prb);
hold on
semilogy(SNRindB1,smld_err_prb,'o');
hold off
title('AWGN信道使用（2，1，2）译码器不同截断长度对系统性能的影响情况')
legend('r=1','r=3','r=5','r=7','r=9','r=11','r=32','without coding');