Wiener–Khinchin theorem
= Wiener–Khinchin theorem
{wiki=Wiener–Khinchin_theorem}
The Wiener-Khinchin theorem, also known as the Wiener-Khinchin theorem for the autocorrelation function, is a fundamental result in the field of signal processing and stochastic processes. It establishes a relationship between the autocorrelation function of a stationary random process and its power spectral density.