Question

Which of the following statement is not true about auto-correlation function?

(a) it is non-unique description of goals

(b) it is measure of both time variation and statistical dependence

(c) it is an average function

(d) it is defined only for periodic signals

I got this question in quiz.

My question is from AM Receiver topic in division Receivers & Transducers of Analog Communications

Answer 1

The correct option is (d) it is defined only for periodic signals

To explain: Auto-correlation function is also known as serial-correlation. It is the correlation of a function with a delayed copy of itself. So it is a non-unique description of signals. It is used for processing signals belonging to a series of values.