Noise signal with matlab

by Posted on

NOISY SIGNAL

clear

clc

 

load 1z88153a8.mat

sig=sigd;

 

load white8.mat

noise=sigd(1:length(sig));

 

clear sigd

 

Esig = sig’ * sig;

 

Enoise = noise’ * noise;

 

noisy_sig = sig + noise*sqrt(Esig/(10*Enoise));

 

noise = noise*sqrt(Esig/(10*Enoise));

 

sig = sig/max(abs(noisy_sig));

 

noise = noise/max(abs(noisy_sig));

 

noisy_sig = noisy_sig/max(abs(noisy_sig));

y = filter(noise,sig,noisy_sig);

 

subplot(221)

plot(sig)

title(‘Signal original’)

subplot(222)

plot(noise)

title(‘Bruit’)

subplot(223)

plot(noisy_sig)

title(‘Signal bruite’)

subplot(224)

plot(y)

title(‘filtered signal’)

 

 

sound(noisy_sig)

 

 

 

 

Published by howdy