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- Path: sparky!uunet!cs.utexas.edu!sun-barr!west.West.Sun.COM!cronkite.Central.Sun.COM!texsun!wb9rxw!kf5iw!gmp!greg
- From: greg@gmp.lonestar.org (G.R. Basile)
- Newsgroups: comp.dsp
- Subject: Re: Energy within a Digitized Pulse
- Keywords: Attenuation, Energy
- Message-ID: <TeNmoB1w164w@gmp.lonestar.org>
- Date: 28 Jul 92 14:57:40 GMT
- References: <15498@ucdavis.ucdavis.edu>
- Organization: GMP Research Co., Dallas TX
- Lines: 22
-
- liuc@madrone.eecs.ucdavis.edu (Chia-Liang Liu) writes:
-
- > In article <uJVgoB1w164w@gmp.lonestar.org> greg@gmp.lonestar.org (G.R. Basile
- > >
- > >Isn't this only an approximation? For a countinuous signal the power is
- >
- > Yes and No! If you try to evaluate the energy of the original
- > continuous signal, you either use Simpson's rule or over-sample
- > the signal to increase the accuracy. However if you are talking about
- > the energy of a sampled_and_hold signal, sum and multiply by Ts is
- > what you want.
- >
- > --
- > Ka-Leung Lau ( Chia-Liang Liu )
-
- I agree. What has piqued my curiousity is how to derive an exact solution
- of the power of the continuous time signal from the sampled data. What about
- taking an fft of the samples and than summing the square of the magnitudes ?
- What errors are introduced?
-
- Greg Basile
- greg@gmp.lonestar.org
-