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Article #1359Re: Why do FIR filters always have odd tap counts?
From: Mark D. Grosen
Date: Fri, 07 Dec 1990 16:59
Date: Fri, 07 Dec 1990 16:59
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Another reason to use odd-length FIR filters is that even-length (symmetric) FIR filters always have a zero at omega = pi (ie, 1/2 the sampling rate). This makes them unsuitable for use as highpass filters, but possibly better for low or bandpass filters. Mark D. Grosen ARPA: grosen@amadeus.ucsb.edu Signal Processing Lab / Communications Research Lab ECE Dept. University of California Santa Barbara, CA 93106
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Path: arc1-ca.pugleaf.net!utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!ucsd!hub.ucsb.edu!amadeus!grosen From: grosen@amadeus.ucsb.edu (Mark D. Grosen) Newsgroups: comp.dsp Subject: Re: Why do FIR filters always have odd tap counts? Message-ID: <7725@hub.ucsb.edu> Date: 7 Dec 90 16:59:12 GMT References: <18193@netcom.UUCP> <HEDSTROM.90Dec6095652@pollux.UVic.CA> Sender: news@hub.ucsb.edu Reply-To: grosen@amadeus.UUCP (Mark D. Grosen) Organization: University of California, Santa Barbara Lines: 10