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wfir — linear-phase FIR filters
[wft,wfm,fr]=wfir(ftype,forder,cfreq,wtype,fpar)
| 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 |
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.
C. Bunks
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