Filtri in virgola fissa
È possibile modellare gli algoritmi di filtraggio dell'elaborazione del segnale in virgola fissa e analizzare gli effetti della quantizzazione sul comportamento e sulle prestazioni del sistema utilizzando le funzionalità DSP System Toolbox™ e Fixed-Point Designer™. Per un elenco dei System object DSP System Toolbox che supportano le operazioni in virgola fissa, vedere System Objects in DSP System Toolbox that Support Fixed-Point Design. Per un elenco dei blocchi di DSP System Toolbox che supportano le operazioni in virgola fissa, utilizzare la funzione showsignalblockdatatypetable.
Oggetti
Funzioni
freqrespest | Frequency response estimate via filtering |
freqrespopts | Create an options object for frequency response estimate |
freqz | Frequency response of discrete-time filter System object |
impz | Impulse response of discrete-time filter System object |
isstable | Verify that discrete-time filter System object is stable |
noisepsd | Power spectral density of filter output due to round-off noise |
noisepsdopts | Create an options object for output noise PSD computation |
reorder | Reorder second-order sections of biquadratic filter System object |
scale | Scale second-order sections |
specifyall | Fully specify fixed-point filter System object settings |
zplane | Z-plane zero-pole plot for discrete-time filter System object |
Blocchi
Argomenti
- Fixed-Point Precision Rules for Avoiding Overflow in FIR Filters
Precision Rules for Avoiding Overflow in FIR Filters.
- Create an FIR Filter Using Integer Coefficients
Learn how to create an FIR filter using integer coefficients.
- Use Filter Designer with DSP System Toolbox Software
Presents a detailed reference covering the fixed-point, multirate, and scaling pages of the Filter Designer App.
- Fixed-Point Filter Design in MATLAB
Design filters for use with fixed-point input.
Esempi in primo piano
Sigma-Delta A/D Conversion
Model analog-to-digital conversion by implementing a sigma-delta algorithm.
Cochlear Implant Speech Processor
Simulate the design of a cochlear implant that can be placed in the inner ear of a profoundly deaf person to restore partial hearing. Signal processing is used in cochlear implant development to convert sound to electrical pulses. The pulses can bypass the damaged parts of a deaf person's ear and be transmitted to the brain to provide partial hearing.
Design and Analysis of a Digital Down Converter
Use the digital down converter (DDC) System object™ to emulate the TI Graychip 4016 digital down converter in a simple manner. We base the example on a comparison with the GSM Digital Down Converter in Simulink example. We show how the DDC System object can be used to design and analyze the decimation filters and to quickly explore different design options that meet various passband and stopband frequency and attenuation specifications. This example requires a Fixed-Point Designer™ license.
