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wfir Scilab Group Scilab Function wfir
NAME
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
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