Filter Design

FIR，IIR

You can design and analyze a variety of digital FIR and IIR filters using DSP System Toolbox™ functions and apps. Some of these filters include advanced filters such as Nyquist filters, halfband filters, advanced equiripple filters, and quasi-linear phase IIR filters.

Apps

Filter Builder 从频率和magnitu设计过滤器de specifications (滤波器启用器）

职能

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Filter Design and Visualization Tools

`filterDesigner`	开放滤清器设计器应用程序
`滤波器启用器`	Interactive filter design
`fvtool`	可视化DSP过滤器的频率响应

fdesignMethods

`butter`	Butterworth IIR digital filter design
`cheby1`	Chebyshev I型使用规格对象
`cheby2`	Chebyshev II型过滤器使用规格对象
`design`	Apply design method to filter specification object
`DesignMethods`	可用于从规范对象设计过滤器的方法
`designoptions`	Show all options available for specified design
`DesignOpts`	Valid input arguments and values for specification object and method
`椭圆`	使用规格对象的椭圆滤波器
`equiripple`	Equiripple单速率FIR过滤器从规范对象
`freqsamp`	Real or complex frequency-sampled FIR filter from specification object
`help`	使用过滤器规范的设计方法的帮助
`setSpecs`	Specifications for filter specification object
`validstructures`	Structures for specification object with design method

fdesign对象

`fdesign`	Filter design specification object
`fdesign。bandpass`	Bandpass filter design specification object
`fdesign。bandstop`	Bandstop filter design specification object
`fdesign。highpass`	Highpass filter specification object
`fdesign.lowpass`	低通滤波器规范
`fdesign.decemator`	清除器过滤器规范对象
`fdesign.interpolator`	Interpolator filter specification
`fdesign。rsrc`	Rational-factor sample-rate converter specification
`fdesign。arbmag`	Arbitrary response magnitude filter specification object
`fdesign。arbmagnphase`	Arbitrary response magnitude and phase filter specification object
`fdesign.ciccomp`	CIC补偿器过滤器规范对象
`fdesign.comb`	IIR comb filter specification object
`fdesign.differentiator`	Differentiator filter specification object
`fdesign.fracdelay`	Fractional delay filter specification object
`fdesign。halfband`	半带滤波器规格对象
`fdesign.hilbert`	Hilbert filter specification object
`fdesign。isinchp`	Inverse sinc highpass filter specification
`fdesign。isinclp`	逆SINC低通滤波器规范
`fdesign.notch`	Notch filter specification
`fdesign。nyquist`	Nyquist filter specification
`fdesign。peak`	Peak filter specification
`fdesign。polysrc`	构造多项式样品速率转换器（PolySRC）滤波器设计器

FIR

`designFracDelayFIR`	设计带限制的分数延迟FIR滤波器
`DesignMultirateFir`	Multirate FIR filter design
`designMultistageDecimator`	Multistage decimator design
`designMultistageInterpolator`	多阶段插值器设计
`fircband`	Constrained-band equiripple FIR filter
`firceqrip`	受约束的equiripple fir滤波器
`fireqint`	Equiripple FIR interpolators
`firgr`	Parks-McClellan Fir滤清器
`firhalfband`	半带FIR滤波器设计
`firlpnorm`	Least P-norm optimal FIR filter
`firls`	Least-square linear-phase FIR filter design
`牢固`	Minimum-phase FIR spectral factor
`firnyquist`	Lowpass Nyquist (Lth-band) FIR filter
`firpr2chfb`	Two-channel FIR filter bank for perfect reconstruction
`ifir`	插值FIR滤波器设计
`normalizefreq`	Switch filter specification between normalized frequency and absolute frequency

IIR

`CA2TF`	Convert coupled allpass filter to transfer function form
`cl2tf`	Convert coupled allpass lattice to transfer function form
`iircomb`	IIR comb notch or peak filter
`iirgrpdelay`	Optimal IIR filter with prescribed group-delay
`iirrpnorm`	Least P-norm optimal IIR filter
`iirrpnormc`	Constrained least Pth-norm optimal IIR filter
`iirnotch`	Second-order IIR notch filter
`iirpeak`	二阶IIR峰或谐振器滤波器
`normalizefreq`	Switch filter specification between normalized frequency and absolute frequency

对象

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Singlerate

`dsp.Differentiator`	Direct form FIR fullband differentiator filter
`dsp.HampelFilter`	使用Hampel标识符过滤离群值
`dsp.HighpassFilter`	FIR or IIR highpass filter
`dsp.LowpassFilter`	FIR or IIR lowpass filter
`dsp.MedianFilter`	中值过滤器
`dsp.NotchPeakFilter`	二阶可调节口气和峰值IIR滤波器
`dsp.VariableBandwidthFIRFilter`	可变带宽FIR滤波器
`dsp.VariableBandwidthIIRFilter`	可变带宽IIR过滤器

Multirate

`dsp.ciccompensation -ectecator`	使用FIR解剖器补偿CIC分解过滤器
`dsp.ciccompensation Interpolator`	Compensate for CIC interpolation filter using FIR interpolator
`dsp.firhalfbanddecemator`	半带摘要
`dsp.FIRHalfbandInterpolator`	Halfband interpolator
`dsp.IIRHALFBANDDECERATOR`	Decimate by factor of two using polyphase IIR
`dsp.IIRHalfbandInterpolator`	Interpolate by a factor of two using polyphase IIR

Blocks

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Filter Design and Visualization Tools

模拟滤镜设计	设计和实施模拟过滤器
Digital Filter Design	Design and implement digital FIR and IIR filters
滤波器实现向导	使用数字过滤器块或总和，增益和延迟块构建过滤器实现

Singlerate

Arbitrary Response Filter	Design arbitrary response filter
带通滤波器	Design bandpass filter
Bandstop Filter	设计带挡滤波器
Comb Filter	设计梳子过滤器
Differentiator Filter	Direct form FIR fullband differentiator filter
汉普尔过滤器	使用Hampel标识符过滤离群值
高通滤波器	Design FIR or IIR highpass filter
Hilbert Filter	Design Hilbert filter
Inverse Sinc Filter	设计倒数SINC滤波器
Lowpass Filter	Design FIR or IIR lowpass filter
Median Filter	中值过滤器
Notch峰过滤器	Design second-order tunable notching and peaking IIR filter
Variable Bandwidth FIR Filter	设计可调的带宽FIR滤波器
Variable Bandwidth IIR Filter	Design tunable bandwidth IIR filter

Multirate

CIC过滤器	设计级联的集成板（CIC）过滤器
CIC Compensation Decimator	Compensate for CIC filter using FIR decimator
CIC Compensation Interpolator	Compensate for CIC filter using FIR interpolator
FIR Halfband Decimator	Decimate signal using polyphase FIR halfband filter
FIR半乐队插值器	Interpolate signal using polyphase FIR half band filter
IIR Halfband Decimator	使用多相IIR半带滤波器脱节信号
IIR Halfband Interpolator	Interpolate signal using polyphase IIR halfband filter
Nyquist Filter	Design Nyquist filter

话题

使用过滤器设计器
使用Filter Designer作为功能强大但方便的图形工具来设计和分析过滤器。
在FDesign中设计过滤器 - 过程概述
Learn how to analyze, design, and implement filters in MATLAB^®和Sim万博1manbetxulink^®。
滤清器设计过程
滤波器启用器GUI.
使用DSP系统工具箱软件使用过滤器设计器
Presents a detailed reference covering the fixed-point, multirate, and scaling pages of the Filter Designer App.
低通FIR滤波器设计
This example shows how to design a lowpass FIR filter usingfdesign。
在低通FIR设计中控制设计规范
这个例子展示了如何控制过滤器的顺序, passband ripple, stopband attenuation, and transition region width of a lowpass FIR filter.
Minimax FIR Filter Design
This example shows how to use some of the key features of the generalized Remez FIR filter design function.
使用非Equiripple stopband设计过滤器
This example shows how to design lowpass filters with stopbands that are not equiripple.
Design and Implement a Filter
设计一个数字低通滤波器并将其整合到模型中，以模拟低频噪声的存在。
Minimizing Lowpass FIR Filter Length
This example shows how to minimize the number coefficients, by designing minimum-phase or minimum-order filters.
References — Advanced Filters
Suggested reading and sources for advanced filter design topics.

特色示例

Multistage Halfband IIR Filter Design

设计多阶段的半频带IIR删除器。

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Classic IIR Filter Design

设计经典的IIR过滤器。最初的重点是关键设计参数是截止频率的情况，在该频率上，滤波器的功率衰减到一半（-3 dB）标称Passband值。

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Design of Peaking and Notching Filters

Design peaking and notching filters. Filters that peak or notch at a certain frequency retain or eliminate a particular frequency component of a signal. The design parameters for the filter are the frequency at which the peak or notch is desired, and either the 3-dB bandwidth or the filter's Q factor. Moreover, given these specifications, by increasing the filter order, it is possible to obtain designs that more closely approximate an ideal filter.

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Arbitrary Magnitude and Phase Filter Design

Design filters with customized magnitude and phase specifications. Many filter design problems focus on the magnitude response only, while assuming a linear phase response through symmetry. In some cases, however, the desired filter needs to satisfy constraints on both magnitude and phase.

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Least Pth-Norm Optimal FIR Filter Design

Design least Pth-norm FIR filters with the firlpnorm function. This function uses a least-Pth unconstrained optimization algorithm to design FIR filters with arbitrary magnitude response.

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Least Pth-Norm Optimal IIR Filter Design

设计最佳幅度响应的最佳IIR滤波器使用最不受限制的优化算法。

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FIR Nyquist (L-th band) Filter Design

Design lowpass FIR Nyquist filters. It also compares these filters with raised cosine and square root raised cosine filters. These filters are widely used in pulse-shaping for digital transmission systems. They also find application in interpolation/decimation and filter banks.

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