Article View: comp.dsp
Article #983Re: Practical DSP problem
From: Gregory Harrison
Date: Tue, 09 Oct 1990 15:57
Date: Tue, 09 Oct 1990 15:57
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In article <9360012@hplsla.HP.COM> bobc@hplsla.HP.COM (Bob Cutler) writes: >> >>I have an application where I need phase, rather than amplitude, but >>the problem is similar. In that case, I compute: >> >> for i = 0 through a bunch >> I = sum(sinwt*sample[i]) >> Q = sum(coswt*sample[i]) I believe that this is called the Geotzel method, and should be documented in good DSP texts. It is much more costly to compute an entire spectrum in this manner, but I would guess that it works just fine with single line spectra. I wonder if you could use a window on it. I wonder if you could process a wigner kernel in this manner. I believe that using this method you create a tuned filter. I wonder how to handle non-stationary cases. Score: 3 wonders, 3 tidbits of info. Greg
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!decwrl!sdd.hp.com!uakari.primate.wisc.edu!crdgw1!ge-dab!sunwhere!harrison From: harrison@sunwhere.DAB.GE.COM (Gregory Harrison) Newsgroups: comp.dsp Subject: Re: Practical DSP problem Message-ID: <6145@ge-dab.GE.COM> Date: 9 Oct 90 15:57:32 GMT References: <3575@syma.sussex.ac.uk> <9360012@hplsla.HP.COM> Sender: news@ge-dab.GE.COM Reply-To: harrison@sunwhere.UUCP (Gregory Harrison) Organization: GE Simulation & Control Systems Dept., Daytona Beach, FL Lines: 18