滤波器分析

可视化滤波器的频率响应，验证滤波器的属性和特征

DSP System Toolbox™ 为您提供多种滤波器分析功能，用于验证滤波器设计设定。您可以使用这些功能来可视化各种滤波器响应，如幅值、相位、冲激和阶跃响应。您还可以使用 coeffs、cost 和 info 等函数来确定滤波器属性，并使用 firtype、isfir 和 isstable 等函数来验证滤波器特征。有关 DSP System Toolbox 提供的所有分析函数的完整列表，请参阅 Analysis Functions for Filter System Objects。

您还可以使用 MATLAB® 中的 dsp.DynamicFilterVisualizer 对象和 Simulink® 中的 Filter Visualizer 模块来可视化时变数字滤波器的幅值和相位响应。有关详细信息，请参阅Configure Filter Visualizer。

App

滤波器分析器View, analyze, and compare filters (自 R2024a 起)

函数

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dsp.DynamicFilterVisualizerDisplay time-varying magnitude and phase response of digital filters
filterDesignerOpen Filter Designer app
filterAnalyzerAnalyze filters with Filter Analyzer app (自 R2024a 起)
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 (自 R2024a 起)
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 (自 R2022a 起)
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
reset重置 System object 的内部状态
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 (自 R2024a 起)
allpass2wdfAllpass to Wave Digital Filter coefficient transformation
normalizefreqSwitch filter specification between normalized frequency and absolute frequency
wdf2allpassWave Digital Filter to allpass coefficient transformation

对象

filterAnalyzerAnalyze filters with Filter Analyzer app (自 R2024a 起)

模块

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

主题