signal processing

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arun
arun le 21 Fév 2012
how to take a auto correlation of signal?what is the difference between auto correlation and cross correlation? if we take auto correlation of a signal what do we infer from this?please help me,,, thank in advance....
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Daniel Shub
Daniel Shub le 21 Fév 2012
As it stands this isn't a MATLAB question.

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Honglei Chen
Honglei Chen le 21 Fév 2012
You can us xcorr to do both auto and cross correlation, e.g.,
xcorr(x,x)
xcorr(x,y)
doc xcorr
Auto correlation is the correlation between one signal and itself while cross correlation is the correlation between two different signals. The autocorrelation can tell you, for example, whether there is periodic component in the signal.

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