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MathGroup Archive 2003

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Re: Discrete Fourier Transform

  • To: mathgroup at smc.vnet.net
  • Subject: [mg43867] Re: Discrete Fourier Transform
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Thu, 9 Oct 2003 01:54:53 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <bm0juq$prl$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

you sample is assumed to be always equdistant on the interval [0,2Pi)
in a discrete Fourier transform. You frequency resolution is the same
as the time resolution (for complex signals) ...

Regards
  Jens

Katie Neish wrote:
> 
> Hello everyone,
> 
> I am attempting to perform a discrete Fourier transform on a time series
> using Mathematica 4.0.  (I'd like to determine the period of the signal.)
> Unfortunately, I noticed that I cannot control the frequency resolution of
> this transform.  I also have no idea what units the frequency is in.
> 
> Do you know of any way to get around the problem?
> 
> Thanks so much.
> 
> Catherine Neish


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