PSD units conversion
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I would like to have units of V/RootHz on the Y axis. I can get Volts by removing 10*log10 from code blow, but how do I get /rootHz Code:
fs=2000;
Hs=spectrum.periodogram; % Use default values
psdest = psd(Hs,Signal,'Fs',fs);
semilogx(psdest.Frequencies,10*log10(psdest.Data));
grid on;
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Wayne King
2011-11-1
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You get V^2 by removing 10*log10(), not V.
What do you mean by V/rootHz?
1 个评论
Guglielmo
2012-1-26
Wait be careful.
PSD is a power so it's unit is dB re V^2/Hz (I assume the input signal is in V).
Removing dB you have V^2/Hz or with sqrt V/sqrt{Hz}.
Don't forget there is a spectral band
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