Re: FFTs of Low Frequency Signals

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Article #509

#509

From: Adam B. Fineberg
Date: Mon, 13 Nov 1989 22:53

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>  harrison@sunny.DAB.GE.COM writes:

>  The Wigner Distribution permits excellent time frequency
>  localization far surpassing an FFT in this regard.

The wigner distribution only provides increased time-frequency
localization for non-stationary signals.  It still does not provide
better localization than the uncertainty principle.  The question was
about estimating the frequency of a stationary signal.  The only
concern was whether or not more data (longer observation time) was
needed to accuractly estimate the frequency.  The wigner distribution
would not provide any additional information over the FFT but would be
significantly more computationally expensive.

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Message-ID: <Nov.13.17.53.26.1989.4464@caip.rutgers.edu>

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<10208@cadnetix.COM> <89Nov8.111523est.30802@snow.white.toronto.edu> <Nov.8.16.32.08.1989.2581@caip.rutgers.edu> <2631@ge-dab.GE.COM>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!wuarchive!psuvax1!rutgers!caip.rutgers.edu!fineberg
From: fineberg@caip.rutgers.edu (Adam B. Fineberg)
Newsgroups: comp.dsp
Subject: Re: FFTs of Low Frequency Signals
Message-ID: <Nov.13.17.53.26.1989.4464@caip.rutgers.edu>
Date: 13 Nov 89 22:53:28 GMT
References: <10208@cadnetix.COM> <89Nov8.111523est.30802@snow.white.toronto.edu> <Nov.8.16.32.08.1989.2581@caip.rutgers.edu> <2631@ge-dab.GE.COM>
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Organization: Rutgers Univ., New Brunswick, N.J.
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