how can i apply wavelet filter to this code

4 次查看（过去 30 天）
Mehmet Özgür Güzel
编辑： Amith 2024-8-16
% 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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回答（1 个）

Amith
Amith 2024-8-16
编辑：Amith 2024-8-16
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!

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