Does anyone know the difference between the power spectrum of a signal and the power spectral density (PSD) spectrum of a signal?(adsbygoogle = window.adsbygoogle || []).push({});

I've read on the net lots of things ranging from:

i) They are identical

ii) Power spectrum is units of Watts, power spectral density spectrum units of Watts/Hz, so not identical (conflicts with i))

iii) PSD spectrum is the magnitude spectrum of a signal squared

iv) Power spectrum is magnitude spectrum of a signal squared (conflicts with iii))

v) Power spectrum is for periodic time signals (which are discrete in frequency domain) and PSD spectrum is for non-periodic time signals (which are continuous in frequency domain)

Which of these is correct, and what are the fundatmental differences between the power spectrum and the PSD spectrum?

Thanks!

Paul

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# Homework Help: Power Spectrum vs. Power Spectral Density Spectrum

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