Need to design digital filter
- To: mathgroup at smc.vnet.net
- Subject: [mg122909] Need to design digital filter
- From: Jerry <lanceboyle at qwest.net>
- Date: Wed, 16 Nov 2011 04:43:42 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
Is there a currently-maintained signals and systems package, or perhaps a signal processing package? Specifically, I have a need to design a few digital filters. I definitely need Butterworth type and possibly elliptic type. But my application is weird in that I need a low pass filter with a _very_ narrow passband, for which Octave generates unstable filters. I suspect numerical problems and thus could possibly benefit from Mathematica's ability to do symbolic computation and then compute the numerical results with extra precision. I will do the filtering in another (non-Mathematica) program--I need only poles or coefficients for a cascade of second-order sections. Thanks, Jerry