DADiSP Filters -Filter Functions
Filter Functions
Although most users access DADiSP/Filters through the dialog based interface, DADiSP/Filters includes over standalone 50 functions. The following table is a summary of each function
* Indicates new or improved Version 5.0 functions.
FIR Filter Functions
bandpass | Designs a FIR linear phase bandpass filter |
bandstop | Designs a FIR linear phase bandstop filter |
diff | Designs a FIR differentiator |
fastfilter | FFT based FIR filtering |
highpass | Designs a FIR linear phase highpass filter |
hilbert | Designs a FIR Hilbert transformer |
kwbpass* | Designs a Kaiser window FIR bandpass filter |
kwbstop* | Designs a Kaiser window FIR bandstop filter |
kwhpass* | Designs a Kaiser window FIR highpass filter |
kwlpass* | Designs a Kaiser window FIR lowpass filter |
lowpass | Designs a FIR linear phase lowpass filter |
remez | Creates multiband FIR linear phase filters |
IIR Filter Functions
bessel* | Designs an IIR Bessel filter |
butterworth | Designs an IIR Butterworth filter |
cascade | Filters a time domain input with an IIR filter |
cheby1 | Designs an IIR Chebychev I filter |
cheby2 | Designs an IIR Chebychev II filter |
elliptic | Designs an IIR Elliptical filter |
Filter Response Functions
filtgrpdelay* | Calculates group delay of any filter |
filtmag* | Calculates any filter magnitude response |
filtimp* | Calculates any filter impulse response |
filtphase* | Calculates any filter phase response |
firmag | Calculates FIR filter magnitude response |
firphase | Calculates FIR filter phase response |
iirimp* | Calculates IIR filter impulse response |
iirmag* | Calculates IIR filter magnitude response |
iirphase* | Calculates IIR filter phase response |
Filter Coefficient Conversion Functions
cas2dir* | Converts Cascade form to Direct form |
dir2cas* | Converts Direct form to Cascade form |
fir2dir* | Converts FIR impulse form to Direct form |
fir2cas* | Converts FIR impulse form to Cascade form |
Filtering Functions
dirfilter* | Apply Direct form filter in the time domain |
dirfilterF* | Apply Direct form filter in the frequency domain |
filtdataF* | Apply any filter in the frequency domain |
filtdata* | Apply any filter in the time domain |
firfilterF* | Apply FIR filter in the frequency domain |
firfilter | Apply FIR filter in the time domain |
iirfilterF* | Apply IIR filter in the frequency domain |
iirfilter | Apply IIR filter in the time domain |
Misc Filter Functions
filtzeros* | Calculates zeros of any filter |
filtpoles* | Calculates poles of any filter |
fir | Evaluates a FIR difference equation |
firpz | Creates an FIR filter zero plot |
firzeros | Calculates zeros of an FIR filter |
fullfir | Converts FIR filter to full band linear phase |
iir | Evaluates an IIR difference equation |
iirgrpdelay* | Calculates group delay of an IIR filter |
iirpoles | Calculates poles of an IIR filter |
iirpz | Creates an IIR filter pole-zero plot |
iirzeros | Calculates zeros of an IIR filter |
polecoef | Converts IIR biquad to direct pole coeff form |
quantize* | Quantize filter coefficients to N bits |
zerocoef | Converts IIR biquad to direct zero coeff form |
unwrap | Phase unwrapping using Schafer’s algorithm |
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