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The autocorrelation function is maximum at

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The autocorrelation function is maximum at

(a) Origin

(b) Infinity

(c) Origin & Infinity

(d) None of the mentioned

I have been asked this question during an online interview.

My enquiry is from Random Signals topic in portion Signals and Spectra of Digital Communications

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The correct option is (a) Origin

The explanation: On substituting different values in the formula for autocorrelation function it wil be maximum at the origin.

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