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Analyse de filtres

Visualiser les réponses en fréquence et vérifier les propriétés et les caractéristiques des filtres

DSP System Toolbox™ comprend plusieurs fonctionnalités d’analyse de filtre permettant de valider les spécifications de design des filtres. Vous pouvez utiliser ces fonctionnalités pour visualiser diverses réponses des filtres comme la réponse en amplitude, en phase, impulsionnelle et indicielle. Vous pouvez également déterminer les propriétés des filtres avec des fonctions comme coeffs, cost et info, et vérifier leurs caractéristiques avec des fonctions comme firtype, isfir et isstable. Pour une liste complète de toutes les fonctions d’analyse disponibles dans DSP System Toolbox, veuillez consulter Analysis Functions for Filter System Objects.

Il est également possible de visualiser la réponse en amplitude et en phase de filtres numériques non stationnaires avec l’objet dsp.DynamicFilterVisualizer dans MATLAB® et le bloc Filter Visualizer dans Simulink®. Pour plus d’informations, veuillez consulter Configure Filter Visualizer.

Applications

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

Fonctions

développer tout

dsp.DynamicFilterVisualizerDisplay time-varying magnitude and phase response of digital filters
filterDesignerOpen Filter Designer app
fvtoolVisualize frequency response of DSP filters
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 the impulse response of a multirate or a single-rate filter (depuis 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 roundoff noise
noisepsdoptsCreate an options object for output noise PSD computation
outputDelayDetermine output delay of single-rate or multirate filter (depuis 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
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 for CIC rate conversion filter objects (depuis R2024a)
allpass2wdfAllpass to Wave Digital Filter coefficient transformation
normalizefreqSwitch filter specification between normalized frequency and absolute frequency
wdf2allpassWave Digital Filter to allpass coefficient transformation

Objets

filterAnalyzerAnalyze filters with the Filter Analyzer app (depuis R2024a)

Blocs

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

Rubriques