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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