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What is the PSD unit by using FFT method in this post? Thanks!

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ccarrot

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I'm just doing a power spectral density (PSD) analysis of a signal in time domain. I'm following the fft method described in :

https://www.mathworks.com/support/tech-notes/1700/1702.html

It gives the real physical unit for the PSD. However, the unit is "power", is that mean "V^2/Hz"?

If yes, then I take 10*log10(power) or 10*log10(V^2/Hz), do I get the unit of "dB/Hz"?

Then how can I convert it to dBm/MHz?

Thank you very much!
 

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