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数字滤波器分析

幅值、相位、冲激和阶跃响应、相位和群延迟、零极点分析

分析滤波器的频域和时域响应。可视化复平面中的滤波器极点和零点。

App

滤波器分析器View, analyze, and compare filters (自 R2024a 起)
滤波器设计工具从算法选择开始设计滤波器

函数

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abs绝对值和复数的模
angle相位角
freqz数字滤波器的频率响应
grpdelay均值滤波器延迟（群延迟）
phasedelayPhase delay of digital filter
phasezPhase response of digital filter
unwrap平移相位角
zerophaseZero-phase response of digital filter
zplane离散时间系统的零极点图
impzImpulse response of digital filter
impzlengthImpulse response length
stepzStep response of digital filter
filterAnalyzerAnalyze filters with Filter Analyzer app (自 R2024a 起)
filtordFilter order
filternorm2-norm or infinity-norm of digital filter
firtypeType of linear phase FIR filter
isallpassDetermine whether filter is allpass
isfirDetermine if digital filter has finite impulse response
islinphaseDetermine whether filter has linear phase
ismaxphaseDetermine whether filter is maximum phase
isminphaseDetermine whether filter is minimum phase
isstableDetermine whether filter is stable

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