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Re: pwelch power correction factor
Posted:
Nov 19, 2010 11:09 AM


> > My point is that in the applications where spectrum estimation > methods like Welch's method are used, the main focus is to get > an *impression* of the spectrum shape. The exact numbers are > irrelevant. > > As I said, read up on the methods. > > Rune
Thank you Rune. I think your point about getting the "impression" of the spectrum is a valid one. However, you keep implying that I am not reading the documentation. But I am and it says:
"Pxx is the distribution of power per unit frequency. For real signals, pwelch returns the onesided PSD by default; ... Note that a onesided PSD contains the total power of the input signal."
So once again, I am questioning whether or not the PSD does in fact contain the total power of the input signal. Maybe I am missing something fundamental, but again, I think it is a fair question.



