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Article #1098Re: Using system ID for FIR filter design?
From: Larry Kahhan
Date: Sat, 10 Nov 1990 14:25
Date: Sat, 10 Nov 1990 14:25
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1165 bytes
If you're looking to fit a complex frequency response curve to an arbitrary transfer function, I've found that MathCAD works quite well. I've used this technique for both "s" and "z" domain transfer functions with equal success. The only proviso is that convergeance is heavily influence by the choice of initial conditions, so sometimes a little manual "tweaking" of initial conditions is required. Another advantage of using MathCAD is that after a solution is found, the transfer function response can be plotted against the original data set for a visual clue as to goodness of fit. Larry Kahhan - NRA, NRA-ILA, CSG, GSSA , & GOA
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!emory!rsiatl!larry From: larry@rsiatl.UUCP (Larry Kahhan) Newsgroups: comp.dsp Subject: Re: Using system ID for FIR filter design? Message-ID: <4730@rsiatl.UUCP> Date: 10 Nov 90 14:25:17 GMT References: <4973@tekfdi.FDI.TEK.COM> <9360013@hplsla.HP.COM> Reply-To: larry@rsiatl.UUCP (Larry Kahhan) Organization: Radiation Systems, Inc. (a thinktank, motorcycle, car and gun works facility) Lines: 12