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Filtraggio digitale

Filtraggio a fase zero, filtraggio mediano, filtraggio con sovrapposizione, rappresentazione della funzione di trasferimento

Filtri passa-basso, passa-alto, passa-banda e elimina-banda applicano il filtraggio a dati multicanale senza dover progettare i filtri né compensare i ritardi. Esegui il filtraggio a fase zero per rimuovere il ritardo e la distorsione di fase. Utilizza il filtro mediano o Hampel per rimuovere picchi e valori anomali. Converti le funzioni di trasferimento in rappresentazioni diverse, come sezioni di secondo ordine o poli e zeri.

App

Signal Analyzer

Visualize and compare multiple signals and spectra

Funzioni

espandi tutto

Funzioni di filtraggio

`bandpass`	Bandpass-filter signals
`bandstop`	Bandstop-filter signals
`highpass`	Highpass-filter signals
`lowpass`	Lowpass-filter signals
`ctffilt`	Cascaded transfer function filtering (Da R2024b)
`fftfilt`	FFT-based FIR filtering using overlap-add method
`filter`	1-D digital filter
`filter2`	2-D digital filter
`filtfilt`	Zero-phase digital filtering
`filtic`	Initial conditions for transposed direct-form II filter implementation
`hampel`	Outlier removal using Hampel identifier
`latcfilt`	Lattice and lattice-ladder filter implementation
`medfilt1`	1-D median filtering
`residuez`	Z-transform partial-fraction expansion
`sgolayfilt`	Savitzky-Golay filtering
`sosfilt`	Second-order (biquadratic) IIR digital filtering

Convoluzione

`conv`	Convoluzione e moltiplicazione polinomiale
`conv2`	2-D convolution
`convmtx`	Convolution matrix
`deconv`	Least-squares deconvolution and polynomial division

Trasformazioni del sistema lineare

`cell2sos`	Convert second-order sections cell array to matrix
`eqtflength`	Equalize lengths of transfer function numerator and denominator
`latc2tf`	Convert lattice filter coefficients to transfer function form
`scaleFilterSections`	Scale cascaded transfer functions with scale values (Da R2023b)
`sos2ctf`	Convert digital filter second-order section parameters to cascaded transfer function form (Da R2024a)
`sos2cell`	Convert second-order sections matrix to cell array
`sos2ss`	Convert digital filter second-order section parameters to state-space form
`sos2tf`	Convert digital filter second-order section data to transfer function form
`sos2zp`	Convert digital filter second-order section parameters to zero-pole-gain form
`ss`	Convert digital filter to state-space representation
`ss2sos`	Convert digital filter state-space parameters to second-order sections form
`ss2tf`	Convert state-space representation to transfer function
`ss2zp`	Convert state-space filter parameters to zero-pole-gain form
`tf`	Convert digital filter to transfer function
`tf2latc`	Convert transfer function filter coefficients to lattice filter form
`tf2sos`	Convert digital filter transfer function data to second-order sections form
`tf2ss`	Convert transfer function filter parameters to state-space form
`tf2zp`	Convert transfer function filter parameters to zero-pole-gain form
`tf2zpk`	Convert transfer function filter parameters to zero-pole-gain form
`zp2ctf`	Convert zero-pole-gain filter parameters to cascaded transfer function form (Da R2024a)
`ctf2zp`	Convert cascaded transfer functions to zero-pole-gain form (Da R2024b)
`zp2sos`	Convert zero-pole-gain filter parameters to second-order sections form
`zp2ss`	Convert zero-pole-gain filter parameters to state-space form
`zp2tf`	Convert zero-pole-gain filter parameters to transfer function form
`zpk`	Convert digital filter to zero-pole-gain representation

Interazione Simulink

`dspfwiz`	Create Simulink filter block using Realize Model panel
`filt2block`	Generate Simulink filter block

Argomenti

Filter Data with Signal Processing Toolbox Software
Design and implement a filter using command-line functions or an interactive app.
Anti-Causal, Zero-Phase Filter Implementation
Eliminate the phase distortion introduced by an IIR filter.
Compensate for the Delay Introduced by an FIR Filter
Use indexing to counteract the time shifts introduced by filtering.
Compensate for the Delay Introduced by an IIR Filter
Remove delays and distortion introduced by filtering, when it is critical to keep phase information intact.
Speaker Crossover Filters
Devise a simple model of a digital three-way loudspeaker using Chebyshev Type I designs. Visualize the poles, zeros, and frequency responses of the filters.
Discrete-Time System Models
Explore different schemes to represent digital filters.
Linear System Transformations
Convert between various representational schemes for digital filters.
Human Activity Recognition Simulink Model for Smartphone Deployment (Statistics and Machine Learning Toolbox)
Generate code from a classification Simulink^® model prepared for deployment to a smartphone.

Esempi in primo piano

Practical Introduction to Digital Filtering

Design, analyze, and apply digital filters to remove unwanted content from a signal without distorting the data.

Apri live script

Extract Voices from Music Signal

Use Signal Analyzer to extract voices from a song by duplicating and filtering signals.

Apri live script

Resample and Filter a Nonuniformly Sampled Signal

Use Signal Analyzer to resample and filter a signal with missing data.

Apri live script