Path: 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: Date: 13 Nov 89 22:53:28 GMT References: <10208@cadnetix.COM> <89Nov8.111523est.30802@snow.white.toronto.edu> <2631@ge-dab.GE.COM> Distribution: usa Organization: Rutgers Univ., New Brunswick, N.J. Lines: 13 > 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.