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Filter Analysis

Analyze filters and filter objects

Functions

filterDesigner Open Filter Designer app
fvtool Open Filter Visualization Tool
freqrespest Frequency response estimate via filtering
freqrespopts Options for filter frequency response analysis
freqz Frequency response of filter
grpdelay Group delay response of discrete-time filter System object
impz Impulse response of discrete-time filter System object
impzlength Impulse response length
measure Measure frequency response characteristics of filter System object
noisepsd Power spectral density of filter output due to roundoff noise
noisepsdopts Options for running filter output noise PSD
phasedelay Phase delay response of discrete-time filter System object
phasez Unwrapped phase response for filter
stepz Step response of discrete-time filter System object
zerophase Zero-phase response of discrete-time filter System object
zplane Z-plane zero-pole plot for discrete-time filter System object
coeffs Filter coefficients
cost Estimate cost for implementing filter System objects
cumsec Cumulative second-order section of BiquadFilter System object
disp Filter properties and values
double Cast fixed-point filter to use double-precision arithmetic
fftcoeffs Frequency-domain coefficients
filtstates.cic Store CIC filter states
info Information about filter
norm P-norm of filter
nstates Number of filter states
order Order of discrete-time filter System object
reset Reset the internal states of a System object
firtype Type of linear phase FIR filter
isallpass Determine whether filter is allpass
isfir Determine whether filter System object is FIR
islinphase Determine whether filter has linear phase
ismaxphase Determine whether filter is maximum phase
isminphase Determine whether filter is minimum phase
isreal Determine whether filter uses real coefficients
issos Determine whether filter is SOS form
isstable Determine whether filter is stable
scalecheck Check scaling of SOS filter
block Generate block from a digital filter
realizemdl Simulink subsystem block for filter
allpass2wdf Allpass to Wave Digital Filter coefficient transformation
normalizefreq Switch filter specification between normalized frequency and absolute frequency
wdf2allpass Wave Digital Filter to allpass coefficient transformation
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