Modélisation de composants RF

Modélisation comportementale des composants RF et correction des imperfections

Appliquez des imperfections RF et leurs corrections. Modélisez des designs de front-end RF contenant des amplificateurs, des mélangeurs et une prédistorsion numérique (DPD).

Applications

Wireless Waveform Generator

Create, impair, visualize, and export modulated waveforms

Fonctions

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Imperfections

`fspl`	Free space path loss
`frequencyOffset`	Apply frequency offset to input signal (depuis R2022a)
`iqimbal`	Apply I/Q imbalance to input signal
`iqcoef2imbal`	Convert compensator coefficient to amplitude and phase imbalance
`iqimbal2coef`	Convert I/Q imbalance to compensator coefficient
`srmdelay`	Compute delay introduced by Sample-Rate Match block (depuis R2022b)

Visualiser le filtre de bruit de phase

plotPhaseNoiseFilter Plot response of phase noise filter block

Objets

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Imperfections et composants

`comm.MemorylessNonlinearity`	Apply memoryless nonlinearity to complex baseband signal
`comm.MultibandCombiner`	Frequency-shift and combine signals (depuis R2021b)
`comm.PhaseFrequencyOffset`	Apply phase and frequency offsets to input signal
`comm.PhaseNoise`	Apply phase noise to baseband signal
`comm.SampleRateOffset`	Apply sample rate offset to signal (depuis R2021b)
`comm.ThermalNoise`	Add thermal noise to signal

Correction des imperfections

`comm.AGC`	Adaptively adjust gain for constant signal level output
`comm.CoarseFrequencyCompensator`	Compensate for frequency offset of PAM, PSK, or QAM signal
`dsp.DCBlocker`	Block DC component (offset) from input signal
`comm.DPD`	Digital predistorter
`comm.DPDCoefficientEstimator`	Estimate memory-polynomial coefficients for digital predistortion
`comm.IQImbalanceCompensator`	Compensate for IQ imbalance

Blocs

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Imperfections et composants

Complex Phase Difference	Phase difference between two complex signals
Complex Phase Shift	Apply complex phase shift to complex signal
Free Space Path Loss	Apply free space path loss to complex signal
I/Q Imbalance	Apply I/Q imbalances to complex signal
Memoryless Nonlinearity	Apply amplifier models to complex baseband signal
Multiband Combiner	Frequency-shift and combine signals (depuis R2021b)
Phase/Frequency Offset	Apply phase and frequency offsets to complex baseband signal
Phase Noise	Apply receiver phase noise to complex baseband signal
Receiver Thermal Noise	Apply receiver thermal noise to complex signal
Sample-Rate Match	Upsample two signals to common rate (depuis R2022b)
Sample Rate Offset	Apply sample rate offset to input signal (depuis R2022b)

Correction des imperfections

AGC	Adaptively adjust gain for constant signal-level output
Coarse Frequency Compensator	Compensate for carrier frequency offset in PAM, PSK, or QAM
DC Blocker	Block DC component
DPD	Digital predistorter
DPD Coefficient Estimator	Estimate memory-polynomial coefficients for digital predistortion
I/Q Compensator Coefficient to Imbalance	Convert compensator coefficient into amplitude and phase imbalance
I/Q Imbalance Compensator	Compensate for imbalance between in-phase and quadrature components
I/Q Imbalance to Compensator Coefficient	Converts amplitude and phase imbalance into I/Q compensator coefficient

Utilitaires

Complex Phase Difference	Phase difference between two complex signals
Complex Phase Shift	Apply complex phase shift to complex signal

Rubriques

Top-Down Design of RF Receiver
Design an RF receiver for a ZigBee®-like application using a top-down methodology.
Visualize RF Impairments
Apply various RF impairments to a QAM signal.

Sélection d՚exemples

ACS Test Waveform Generation for 5G NR Receiver Testing

Generate waveform for ACS receiver test, as defined in TS 38.141-1, Section 7.4.1.

(5G Toolbox)

Depuis R2024b

Simulate and Verify Power Amplifier Backoff

Use backoff to scale a signal prior to inputting it to a table-based power amplifier.

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RF Noise Modeling

Use the RF Blockset™ Circuit Envelope library to simulate noise and calculate noise power.

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Impact of Thermal Noise on Communication System Performance

Use the RF Blockset Circuit Envelope library to model thermal noise in a super-heterodyne RF receiver and measure its effects on a communications system noise figure (NF) and bit error rate (BER).

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Architectural Design of a Low IF Receiver System

Use the RF Blockset Circuit Envelope library to simulate the performance of a Low IF architecture with RF impairments.

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Adjacent and Co-Channel Interference

Use PSK-modulated signals to show the effects of adjacent and co-channel interference on a transmitted signal.

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OSTBC Transmission with Antenna Coupling

Simulate the effects of antenna mutual coupling on the performance of an orthogonal space-time block code (OSTBC) transmission over a multiple-input multiple-output (MIMO) channel.

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Power Amplifier Characterization

Characterize a power amplifier using measured input and output signals of an NXP Airfast PA.

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Digital Predistortion to Compensate for Power Amplifier Nonlinearities

Use digital predistortion (DPD) in a transmitter to offset the effects of nonlinearities in a power amplifier.

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Impact of RF Effects on Communication System Performance

Model thermal noise, phase noise, and nonlinearity impairments of an RF transceiver in Simulink^®.

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Effect of a High-Power Interferer on ADC Performance

Effect of a high-power in-band or out-of-band interferer on the performance of a communications system with an analog-to-digital converter (ADC).

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