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

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

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Rune Allnor

Posts: 4,455
Registered: 12/7/04
Re: pwelch power correction factor
Posted: Nov 16, 2010 12:55 AM
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On Nov 16, 3:03 am, "Henik Vargas" <v-he...@microsoft.com> wrote:
> Hi all,
>
> I am doing some spectrum analysis and I am thinking of using the pwelch function with a hann window. Now, I understand that application of a window reduces the power of the signal, so usually a correction or scaling factor has to be applied.
>
> My question is, does anyone know if the pwelch function applies this correction factor? I implemented my own welch function to compare and the result is identical, except that MATLAB's pwelch function seems to ignore the correction factor (or I am doing something wrong)


What makes you think you need a correction factor?
Instead of replicating what matlab does, read up on
the method you play with.

Rune



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