Elaborazione del segnale multi-rate
R2026bRicampiona i dati uniformi o non uniformi a una nuova velocità fissa. Esegui la decimazione e l'interpolazione lineare o di ordine superiore senza introdurre aliasing.
App
| Filter Designer | Design filters by choosing algorithm or specifying constraints |
| Signal Analyzer | Visualizzare e confrontare segnali e spettri multipli |
Funzioni
decimate | Decimation — decrease sample rate by integer factor |
downsample | Diminuire la frequenza di campionamento di un fattore intero |
fillgaps | Fill gaps using autoregressive modeling |
interp | Interpolation — increase sample rate by integer factor |
interp1 | Interpolazione di dati monodimensionali (ricerca in tabella) |
intfilt | Interpolation FIR filter design |
pchip | Piecewise Cubic Hermite Interpolating Polynomial (PCHIP) |
resample | Resample uniform or nonuniform data to new fixed rate |
spline | Cubic spline data interpolation |
upfirdn | Upsample, apply FIR filter, and downsample |
upsample | Increase sample rate by integer factor |
Argomenti
- Avoid Aliasing in Signal Downsampling
Aliasing is the distortion that occurs when copies of a signal's spectrum overlap. Downsampling can introduce aliasing.
- Signal Filtering Before Downsampling
Filter before downsampling to mitigate the distortion caused by aliasing.
- Signal Upsampling and Imaging Artifacts
Upsample a signal and see how upsampling can result in images.
- Signal Upsampling and Interpolation Filtering
Upsample a signal and apply a lowpass interpolation filter to remove imaging artifacts.
- Simulate a Sample-and-Hold System
Simulate the output of a sample-and-hold system by upsampling and filtering a signal.
- Signal Resampling
Decimate, interpolate, or change the sample rate of signals, with or without intermediate filtering.
- Change Signal Sample Rate
Change the sample rates of a sinusoid and a recorded speech sample.
Esempi in primo piano
Reconstruct Missing Data
Reconstruct missing data using interpolation, antialiasing filtering, and autoregressive modeling.
Resample Uniformly Sampled Signals
Resample a uniformly sampled signal to a new uniform rate; reduce the impact of large transients and remove unwanted high-frequency content.
Resample Nonuniformly Sampled Signals
Resample a nonuniformly sampled signal to a new uniform rate; apply custom filters to reduce aliasing; remove edge transients.
Obtain Signal Phases Using Downsampling
Use downsampling to obtain the polyphase components of a signal.
