Scilab Function wfir - linear-phase FIR filters
Calling Sequence
- [wft,wfm,fr]=wfir(ftype,forder,cfreq,wtype,fpar)
Parameters
- ftype
: string : 'lp','hp','bp','sb' (filter type)
- forder
: Filter order (pos integer)(odd for ftype='hp' or 'sb')
- cfreq
: 2-vector of cutoff frequencies (0<cfreq(1),cfreq(2)<.5) only cfreq(1) is used when ftype='lp' or 'hp'
- wtype
: Window type ('re','tr','hm','hn','kr','ch')
- fpar
: 2-vector of window parameters. Kaiser window fpar(1)>0 fpar(2)=0. Chebyshev window fpar(1)>0, fpar(2)<0 or fpar(1)<0, 0<fpar(2)<.5
- wft
: time domain filter coefficients
- wfm
: frequency domain filter response on the grid fr
- fr
: Frequency grid
Description
Function which makes linear-phase, FIR low-pass, band-pass,
high-pass, and stop-band filters
using the windowing technique.
Works interactively if called with no arguments.
Author