How can I use cross-correlation as a tool to align two signals in MATLAB?
I have two signals that have a similar behavior but are not aligned. I would like to use cross-correlation to align them.
Kshitij Singh answered .
2025-11-20
load variable_file X1=xcorr(s1,s2); %compute cross-correlation between vectors s1 and s2 [m,d]=max(X1); %find value and index of maximum value of cross-correlation amplitude delay=d-max(length(s1),length(s2)); %shift index d, as length(X1)=2*N-1; where N is the length of the signals figure,plot(s1) %Plot signal s1 hold,plot([delay+1:length(s2)+delay],s2,'r'); %Delay signal s2 by delay in order to align them grid on