How can I create a train chirp pulse?

hi, i am trying to create a train of chirp pulse. i use the chirp and train function but i have no idea how to make it right. here is my code :

fs = 1e3;                   % sample freq 1kHz
D = 0 : 1/fs : 2;           % pulse delay times
t = 0 : 1/fs : 20;          % signal evaluation time
w = 1e3;                    % width of each pulse
x = chirp(t,1,1,10);
yp = pulstran(t,D,x,w);
plot(t,yp)

thank you.

Answer 1

[Youssef Khmou]

That is an interesting problem, before trying to use pulstran function, create a linear frequency function and use square function as follows :

 fs = 1e3;                   % sample freq 1kHz
 D = 0 : 1/fs : 2;           % pulse delay times
 t = 0 : 1/fs : 20;          % signal evaluation time
 f1=1;
 f2=10;
 a=(f2-f1)/(t(end)-t(1));
 f=f1+a*t;
 x=square(2*pi*f.*t);
 figure; plot(t,x);
 axis([0 20 -2 2]);
 title('Train chirp pulse');

[arina octave]

thank you for kindly answer my question