The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Software » comp.soft-sys.matlab

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

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

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Henik Vargas

Posts: 4
Registered: 11/18/10
Re: pwelch power correction factor
Posted: Nov 19, 2010 11:09 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

> 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.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.