Scilab Function
Last update : 00/00/0000
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
C. Bunks