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Topic: pwelch power correction factor
Replies: 7   Last Post: Jul 12, 2014 2:16 PM

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Henik Vargas

Posts: 4
Registered: 11/18/10
Re: pwelch power correction factor
Posted: Nov 19, 2010 11:09 AM
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>
> 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 one-sided PSD by default; ... Note that a one-sided 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.



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