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- Path: sparky!uunet!infoserv!cpuig
- From: cpuig@infoserv.com (Carlos M. Puig)
- Newsgroups: sci.electronics
- Subject: Re: Digital Filtering
- Keywords: Digital Filter software, Matlab
- Message-ID: <aPLyXB1w165w@cpuig>
- Date: Mon, 25 Jan 93 16:54:21 PST
- References: <1993Jan25.095709.17204@eng.cam.ac.uk>
- Distribution: world
- Organization: Minimax Research Corp.
- Lines: 50
-
- cmh@eng.cam.ac.uk (C.M. Hicks) writes:
-
- > fitzpa@eeel.nist.gov (Gerry FitzPatrick) writes:
- >
- > >I need to design a digital filter (either a notch filter or
- > >a low-pass filter). I will be analyzing data taken from a
- > >lecroy 7200 scope (in either ascii or binary). I would like
- > >I would like to look at the 60 Hz component of the waveform.
- >
- > >Any ideas on how to write a subroutine that would perform this
- > >digital filtering on stored data? Any good books on designing
- > >digital filters?
- >
- > 'MatLab' from Mathsworks would be absolutely ideal, although rather expensive
- > It is a data manipulation, analysis, and computational package, which has
- > built-in routines for digital filtering, spectral analysis and graphical
- > output (amongst many hundreds of other things). Runs on a 386 or better
- > (and many other platforms such as NeXT, UN*X), but I think it requires a
- > co-processor. It will, undoubtedly, do everything you need, but maybe costs
- > too much...
-
- The Student Version of Matlab (distributed by Prentice-Hall, I believe)
- is available at US $50. Try the engineering section of a local college
- bookstore. This version will run on any PC-compatible, with or without
- a math coprocessor. However, for reasonable throughput, I recommend at
- least an 8 MHz 80286 with a coprocessor. (A Mac version is also available,
- but I have not tried it.)
-
- The student version is the same as the previous MATLAB v3.5 with some
- additional m files from a couple of the toolboxes. However, it is
- limited to 1024 elements per variable, and one can print graphs only
- with print screen. For student work, these limitations are not
- serious.
-
- Although the program comes with a good manual, the manual will not
- teach you how to design digitial filters.
-
- I am an EE student and started using this program last semester. It's
- very powerful, not only for DSP, but for general purpose engineering
- calculations. A very good value if you can live with the matrix
- size limitations.
-
- There is a new newsgroup (1 or 2 weeks old) "comp.soft-sys.matlab",
- that is devoted to Matlab. It may not yet be available at all
- sites.
-
-
- ----
- Carlos Puig, KJ6ST cpuig@infoserv.com
- San Jose, CA (408) 289-8174
-