Analysis Functions for Filter System Objects
Method | Description |
---|---|
Single-rate and Multirate Analysis | |
filterAnalyzer | Analyze filters with the Filter Analyzer app |
info | Filter information |
freqz | Frequency response of a discrete-time filter |
freqzmr | DTFT approximation of filter impulse response |
phasez | Phase response of a discrete-time filter |
zerophase | Zero-phase response of a discrete-time filter |
grpdelay | Group delay of a discrete-time filter |
phasedelay | Phase delay of a discrete-time filter |
impz | Impulse response of a discrete-time filter |
impzlength | Impulse response length |
stepz | Step response of a discrete-time filter |
zplane | Pole/Zero plot |
cost | Cost estimate |
measure | Measure filter response |
order | Filter order |
firtype | Determine the type (1–4) of a linear phase FIR filter |
coeffs | Return filter coefficients |
outputDelay | Output delay of single-rate or multirate filter |
Multirate Analysis | |
polyphase | Polyphase decomposition of multirate filters |
gain | Gain of a Cascaded Integrator-Comb (CIC) filter |
Second-order Sections | |
scale | Scale second-order sections |
scalecheck | Check scale of second-order sections |
scaleopts | Create options object for sos scaling |
cumsec | Vector of cumulative second-order section filters |
reorder | Reorder second-order sections |
sos | Convert IIR filter to Biquad filter |
Model Realization | |
realizeModel | Realize model for dsp.CICDecimator and
dsp.CICInterpolator objects |
realizemdl | Filter realization diagram |
Fixed-point (supported by
FIRFilter , IIRFilter ,
AllpoleFilter , and BiquadFilter only) | |
noisepsd | Power spectral density of filter output due to roundoff noise |
noisepsdopts | Create options object for noisepsd computation |
freqrespest | Frequency response estimate via filtering |
freqrespopts | Create options object for frequency response estimate |
Other | |
isallpass | True for allpass discrete-time filter |
islinphase | True for linear discrete-time filter |
ismaxphase | True if maximum phase |
isminphase | True if minimum phase |
isreal | True for discrete-time filter with real coefficients |
isstable | True if the filter is stable |
isfir | True if the filter is FIR |
issos | True if filter is in second order sections form |
specifyall | Specify all fixed-point properties |