how can i apply wavelet filter to this code
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% generate a waveform
f0 =100;
fs=1000;
pw = 0.1;
pri = 1;
npulses = 100;
s = cos(2*pi*f0*(0:1/fs:pw)); % it can be any other waveform of your choice
s(round(fs*pri)) = 0; % PRI
s = repmat(s, npulses, 1); % npulses
% echo: delayed signal
tau = 0.3;
ntau = round(fs*tau);
amp = 0.5;
e = amp* circshift(s, ntau);
% add noise
sigma = 0.1;
r = s + e + sigma*randn(size(s));
y = pulsint(r);
plot((0:length(s)-1)/fs, r)
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