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Key terms: math signal power hz pi omega psd frequency spectral density infty wave function spectrum tau phi units physics frac equal esd estimation discrete values fourier transform exist random versus electronic techniques stationary measure if the signal factor voltage theorem power spectral density integrable continuous dimensions definition sequence distributed magnitude energy spectral density parametric power spectrum signal processing frequency spectrum spectrum analyzer autocorrelation function Search external links cited by footnotes on Wikipedia page Spectral density: |
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