how can i apply wavelet filter to this code

% 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)

Answer 1

[Mathy]

Hi Mehmet,

To add wavelet filters you can make use of the wfilters (Wavelet filters) by MATLAB. This wfilters( wname) function returns the four lowpass and highpass, decomposition and reconstruction filters associated with the orthogonoal or biorthogonal wavelet wname. For Example

wname = "db5";

%Compute the four filters associated with wavelet name specified by wname and plot the results.

[LoD,HiD,LoR,HiR] = wfilters(wname); 
subplot(2,2,1)
stem(LoD)
title("Decomposition Lowpass Filter")

Hope this helps!