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NextFilter Design
Good filter design demands quite a bit of expertise. The following general observations may be helpful.
- FIR filters are a costly way to implement narrowband filters,
but are often reasonable for filters with wider bandwidth.
It is also easier to control the phase response and to design
filters with an arbitrarily shaped frequency response
(as opposed to just lowpass, bandpass, or highpass).
Use Matlab's
remezorfirlsfunctions. - IIR filters typically require much less computation per
output sample than FIR filters for similar frequency
responses. They excel at narrowband filters.
However, it is very difficult to control the phase response.
Use Matlab's
butter,cheby1,cheby2, orellipfunctions.