I have bunch of signals.and I have another signal that is one of mentioned signals but with shifted and different magnitude. How can I find out which signal shifted signal with different magnitude?
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very simple example: my signals are: a=sin^2(x); b=cos^2(x)-2; c=x^3-1; d=x^2-1; and my another signal is f=4*cos^2(x-3);
How can I find out f looks like b ????
thank you very much.
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Salaheddin Hosseinzadeh
2014-8-19
编辑:Salaheddin Hosseinzadeh
2014-8-19
Hi Vahid,
Use
crosscorr(f,b)
or
crosscor(f,b,numel(b)-1)
read MATLAB documentation about crosscorr and how you've to interpret it's output
If you've an amplitude in the out put of crosscorr that is close to 1 it means f and b are similar, if amps are way below 1 then they ain't similar.
doc crosscor
Fs = 100; % Hz
t = 0:1/Fs:2*pi; %
f = 1; % Hz
x = sin(2*pi*f*t);
y = sin(2*pi*f*t + pi/2); % sine and cosine with frequency of 1
z = t.^2; %
crosscorr(x,y)
figure
crosscorr(x,z)
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