Comparing two non periodic signals (signal shift)
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Hi guys, My name is Salah, I have two non periodic signals and im trying to find the shift between them using matlab. the signals are from spectrometer. I attached excel file that contains two signals and photo for them
Thanks Salah
回答（1 个）
Ahmet Cecen
2014-11-20
Import your signals as A and B using the wizard. Also import the time information (x-axis) as T.
X=(ifft(fft(A).*conj(fft(B))));
shiftindex=find(X==max(X));
shift=T(shiftindex)-T(1); % This is the time value of the shift.
Also check below for a plot of the shifted signal and comparison.
figure
plot(A);
hold on;
plot(circshift(B,(find(X==max(X)))));
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