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Article #150Re: Energy within a Digitized Pulse
From: G.R. Basile
Date: Tue, 28 Jul 1992 14:57
Date: Tue, 28 Jul 1992 14:57
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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
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Path: arc1-ca.pugleaf.net!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