Question

What is Wiener-Khinchin theorem?

(a) Spectral density and auto-covariance makes a fourier transform pair

(b) Spectral density and auto-correlatioon makes a fourier tranform pair

(c) Spectral density and variance makes a fourier tranform pair

(d) None of the mentioned

I got this question in quiz.

I want to ask this question from Spectral Density and Autocorrelation topic in portion Signals and Spectra of Digital Communications

Answer 1

Correct option is (b) Spectral density and auto-correlatioon makes a fourier tranform pair

The explanation: According to the theorem spectral density of a signal x(t) and auto correlation function makes a fourier tranform pair.