how to find non periodic (stagger, jitter, sliding PRI) rectangular signal stft and wavelet transform?

Fs = 10;

dt = 1/Fs;

L = 1000000;

t = (0:L-1)*dt;

PRI = 100 + 15 * randn(1,200);

min(PRI)

max(PRI)

PsW = 20;

T = sum(PRI);

NP = length(PRI);

y=-ones(1,L);

tt = mod(t,T);

for k=0:NP-1 sP = sum(PRI(1:k));

    PsOn = find(sP<=tt & tt<sP+PsW);

    y(PsOn)=1;

end

SigP = find(t<10*PRI(1));

figure(1);

plot(t(SigP),y(SigP))

title('Signal');

xlabel('Time (s)');

ylabel('Amplitude');

ylim([0 1.2]);

grid;

[BORA COSKUN]

this jitter (random variable) PRI example.

[PURABI SHARMA]

How to generate Dwell and Switch PRI sequence of a pulse radar signal in matlab?