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Re: signal processing package for IDL [message #466 is a reply to message #462]

Sun, 26 July 1992 13:10

dmatthews
Messages: 1
Registered: July 1992

Junior Member

In article <1992Jul25.142350.26849@afterlife.ncsc.mil>, dpkemp@afterlife.ncsc.mil (David P. Kemp) writes:
> In article <ghsu.711219193@critical> ghsu@critical.nswc.navy.mil () writes:
>> I am interested in finding procedures for signal processing (design of
>> filters, filtering, etc), similar to the signal processing toolbox for
>> matlab), for IDL. Is there something like that in existence? Is
>> there such package available for pvwave? Any pointer will be
>> appreciated.
>>
> Don't get your hopes up. Filter design is probably best done by
> a specialized application (there are lots of them), but it would be
> nice to do the actual filtering in PV-wave.
...
If you don't have to do your filtering in real time, do it in the
frequency domain, i.e. take the Fourier transform of the data,
_multiply_ the result by the desired transfer function, and transform
that result back to the time domain. It's faster and easier to understand
than filtering in the time domain directly.

Dr. David L. Matthews, IPST, Univ. of Maryland, College Park MD 20742-2431
Telephone (301)405-4830 Internet dmatthews@uap.umd.edu
FAX (301)314-9363 NSI/SPAN UMDUAP::DMATTHEWS

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[Message index]

		Re: signal processing package for IDL By: greg on Wed, 19 August 1992 09:30
		Re: signal processing package for IDL By: jacobsen on Thu, 30 July 1992 18:13
		Re: signal processing package for IDL By: thompson on Thu, 30 July 1992 11:47
		Re: signal processing package for IDL By: bhill on Thu, 30 July 1992 11:51
		Re: signal processing package for IDL By: dpkemp on Thu, 30 July 1992 05:56
		Re: signal processing package for IDL By: kevin on Wed, 29 July 1992 15:10
		Re: signal processing package for IDL By: ritscher on Wed, 29 July 1992 06:53
		Re: signal processing package for IDL By: dmatthews on Sun, 26 July 1992 13:10
		Re: signal processing package for IDL By: dpkemp on Sat, 25 July 1992 07:23

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