Analisi del filtro

Visualizzare le risposte in frequenza dei filtri, verificarne le proprietà e le caratteristiche

DSP System Toolbox™ fornisce diverse feature di analisi dei filtri per validarne le specifiche di progettazione. È possibile utilizzare queste feature per visualizzare le varie risposte del filtro, quali l'ampiezza, la fase, la risposta all'impulso e la risposta al gradino. È inoltre possibile definire le proprietà del filtro utilizzando funzioni quali coeffs, cost e info, nonché verificarne le caratteristiche utilizzando funzioni quali firtype, isfir e isstable. Per un elenco completo di tutte le funzioni di analisi fornite da DSP System Toolbox, vedere Analysis Functions for Filter System Objects.

È inoltre possibile visualizzare l'ampiezza e la risposta di fase dei filtri digitali a tempo variabile utilizzando l'oggetto dsp.DynamicFilterVisualizer in MATLAB® e il blocco Filter Visualizer in Simulink®. Per ulteriori informazioni, vedere Configure Filter Visualizer.

App

Filter AnalyzerView, analyze, and compare filters (Da R2024a)

Funzioni

espandi tutto

dsp.DynamicFilterVisualizerDisplay time-varying magnitude and phase response of digital filters
filterAnalyzerAnalyze filters with Filter Analyzer app (Da R2024a)
freqrespestFrequency response estimate via filtering
freqrespoptsCreate an options object for frequency response estimate
freqzFrequency response of discrete-time filter System object
freqzmrCompute DTFT approximation of impulse response of multirate or single-rate filter (Da R2024a)
grpdelayGroup delay response of discrete-time filter System object
impzImpulse response of discrete-time filter System object
impzlengthLength of impulse response of discrete-time filter System object
measureMeasure frequency response characteristics of filter System object
noisepsdPower spectral density of filter output due to round-off noise
noisepsdoptsCreate an options object for output noise PSD computation
outputDelayDetermine output delay of single-rate or multirate filter (Da R2022a)
phasedelayPhase delay response of discrete-time filter System object
phasezPhase response of discrete-time filter System object (unwrapped)
stepzStep response of discrete-time filter System object
zerophaseZero-phase response of discrete-time filter System object
zplaneZ-plane zero-pole plot for discrete-time filter System object
coeffsReturns the filter System object coefficients in a structure
costEstimate cost of implementing filter System object
cumsecCumulative second-order section of the biquadratic filter
dispDisplay filter properties and values
filtstates.cicStore CIC filter states
infoInformation about filter System object
orderOrder of discrete-time filter System object
resetReset internal states of System object
setInputSampleRateSpecify input sample rate in filter objects (Da R2026a)
ssConvert discrete-time filter System object to state-space representation
tfConvert discrete-time filter System object to transfer function
zpkZero-pole-gain conversion of discrete-time filter System object
firtypeDetermine type (1-4) of linear phase FIR filter System object
isallpassVerify that discrete-time filter System object is allpass
isfirVerify if filter System object is FIR
islinphaseVerify that discrete-time filter System object is linear phase
ismaxphaseVerify that discrete-time filter System object is maximum phase
isminphaseVerify that discrete-time filter System object is minimum phase
isrealVerify that discrete-time filter System object is real
issosVerify if discrete-time System object filter is in second-order sections form
isstableVerify that discrete-time filter System object is stable
scalecheckCheck scaling of biquadratic filter
realizemdlSimulink subsystem block for filter
realizeModelCreate Simulink block equivalent of CIC rate conversion filter objects (Da R2024a)
allpass2wdfAllpass to Wave Digital Filter coefficient transformation
normalizefreqSwitch filter specification between normalized frequency and absolute frequency
wdf2allpassWave Digital Filter to allpass coefficient transformation

Oggetti

filterAnalyzerAnalyze filters with Filter Analyzer app (Da R2024a)

Blocchi

Filter VisualizerDisplay magnitude and phase response of time-varying digital filters (Da R2023a)

Argomenti