Functions > Signal Processing > Digital Filtering > About Digital Filtering Functions
About Digital Filtering Functions
The following functions are used in the design of Finite Impulse Response (FIR) and Infinite Impulse Response (IIR) filters.
gain—Returns the gain of a filter.
response, fftfilt—Returns the response of a vector to a FIR or IIR filter.
bandpass, bandstop, highpass, lowpass—Returns coefficients for a bandpass, bandstop, highpass, or lowpass of an FIR filter.
remez—Returns coefficients for an FIR filter generated by the Remez exchange algorithm.
bessel, butter, cheby1, cheby2—Returns coefficients for a Bessel filter, a Butterworth filter or a Chebyshev filter of Type I or II.
iirhigh, iirlow, iirpass, iirstop—Returns coefficients for a highpass, lowpass, bandpass, or bandstop of an IIR filter.
filtfilt—Returns the zero-phase response of a filter.
grpdelay—Returns the group delay imposed by a filter.
upsample, multirate, resample—Performs interpolation and then resampling of an array.
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