cross-correlation of two signal always shows unexpected 0 lag
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Hi,everyone, I got a very strange issue.
b is a signal of 251 samples. c is got by shifting b by 5 sample. (b and c are attached).
But when I do xcorr on b and c, the max correlation always occurs at 0 lag. which I do not understand. Can someone help?
Below is my code. Thank you.
[r,lag] = xcorr(b,c,'coeff');