sundar@mit-hermes.AI.MIT.EDU (Sundar Narasimhan) (08/05/87)
Hi:
I have run into the following problem and was wondering if anyone
had a good solution -- I need a fair notch filter at a very low frequency
(0.4Hz at 12.5ms sampling rate), to be used in the input part of a digital
controller (which doesnt limit the filter to being causal).
The standard Parks-McClellan algorithm that I use blows up when
the number of coefficients exceeds 1000.
So, does anyone have code (preferably C or Fortran) that does filter design
which doesn't have this limitation?
-Sundar
p.s. send your responses to sundar@hermes.ai.mit.edu, or
mit-eddie!mit-hermes!sundar since I read news only occasionally.