Power Spectral Density - MIT OpenCourseWare
is useful to have a name for the Laplace transform of the autocorrelation function; we shall refer to Sxx(s) as the complex PSD. Exactly parallel results apply for the DT case, leading to the conclusion that Sxx(ejΩ) is the power spectral density of x[n]. 10.2 EINSTEIN-WIENER-KHINCHIN THEOREM ON EXPECTED TIME AVERAGED POWER
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