how to create copies of chirp signal?

hello. how can i create 32 copies of bidirectional chirp signal in matlab??? for example for this code; how can i create 32 copies?? t1=1; f0=0; f1=100; t=0:0.001:0.999; y=chirp(t,f0,t1,f1,'linear'); Y=[y y(end:-1:1)];

plot(0:0.001:1.999,Y)

Answer 1

[Mathieu NOE]

hello

i modified a bit your code and expanded it

hope it helps

t1=1;
f0=0;
f1=100;
samples = 1000;
dt = 1e-3;
t=(0:samples-1)*dt;
y=chirp(t,f0,t1,f1,'linear');
Y=[y y(end:-1:1)]; % single waveform 

figure(1);
t=(0:2*samples-1)*dt;
plot(t,Y)

% 32 waveforms
N = 32;
YY = repmat(Y,1,N);
figure(2);
t=(0:length(YY)-1)*dt;
plot(t,YY)

[majid]

excuse me again! I have another question! how can we insert delay to this signal? for example 0.5 second!

[Mathieu NOE]

hello

you mean you would like to insert zeros during 0.5 s at the beginning of the signal ?

[majid]

hello

suppose we transmit bidirectional chirp signal in the medium then, we recieved it by a detector.

because of this propagation such a signal will be shifted in time by the relation Time=Distance/speed .

I want to do this work.

[Mathieu NOE]

hello

you can simply add or retrieve a time offset to the time vector computed in first place :

t=(0:samples-1)*dt + offset;

[majid]

thanks!

Answer 2

[majid]

thank you very much, Mathieu.

[Mathieu NOE]

You're welcome