channelplot.m

JAKES 模型的具体实现,应用瑞利衰落信道的特性

%%
%% Plot the Raleigh channel taps;
fd = 200;
N = 200000;		% N >200000,or it will distory the gaussian of the WGN;
h = TDL(fd,N);
h_dB = 20*log10(abs(h)+eps);

y = h_dB(64001:128000,:);                    
x=[1:length(y)]/256;                                      
h2=zeros(64000,4);
h3=1./h2;
h3([1600:1600:64000],:)=y([1600:1600:64000],:);

plot(x,h3(:,[1]),'*',x,h3(:,[2]),'v',x,h3(:,[3]),'o',x,h3(:,[4]),'d',x,y(:,[1]),x,y(:,[2]),x,y(:,[3]),x,y(:,[4])); 
xlabel('Time(ms)');ylabel('Channel Amp(dB)');
title('Raleigh Channel');
legend('Tap 1;','Tap 2','Tap 3','Tap 4');
grid on;


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
pause;
subplot(2,2,1);     plot(x,y(:,[1]));
grid on;            xlabel('Time(ms)');     ylabel('Channel Amp(dB)');
title('Raleigh Channel');                   legend('Tap 1',4);

subplot(2,2,2);     plot(x,y(:,[2]));
grid on;xlabel('Time(ms)');ylabel('Channel Amp(dB)');
title('Raleigh Channel');legend('Tap 2',4);

subplot(2,2,3);plot(x,y(:,[3]));grid on;xlabel('Time(ms)');ylabel('Channel Amp(dB)');
title('Raleigh Channel');legend('Tap 3',4);

subplot(2,2,4);plot(x,y(:,[4]));grid on;xlabel('Time(ms)');ylabel('Channel Amp(dB)');
title('Raleigh Channel');legend('Tap 4',4);

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