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.

Accepted Answer

Salaheddin Hosseinzadeh
Salaheddin Hosseinzadeh on 19 Aug 2014
Edited: Salaheddin Hosseinzadeh on 19 Aug 2014
Hi Vahid,
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; %
vahid torabi
vahid torabi on 21 Aug 2014
Thank you so much Mr Hosseinzadeh.But my signals are discrete.I have .mat data.I mean:(timeseries data) my signals have time and magnitude. signal 1 : have time(.mat file) and a value(.mat file) signal 2 :......... signal 3 :.......
How to code in this case????

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