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Noise Modeling

Noise sources, phase noise, thermal noise, noise figure specification

Use noise sources to simulate white or colored noise in RF models and calculate the noise power. To calculate thermal noise, use S-Parameters block.


Amplifier Model amplifier in RF systems
Attenuator Model attenuator for RF circuit
Resistor Model resistor for circuit envelope analysis
S-Parameters Model S-parameter network
Mixer Model mixer in RF systems
Variable Attenuator Model variable attenuator
Variable Phase Shift Model variable phase device
Variable Capacitor Model variable capacitor
Variable Inductor Model variable inductor
Circulator Model ideal frequency-independent circulators with S-parameters
Coupler Model ideal frequency-independent couplers with S-parameters
Divider Model ideal frequency-independent dividers (combiners) with S-parameters
Continuous Wave Model constant envelope source
Noise Model noise using current or voltage noise source in RF systems
Sinusoid Model DC offset and sinusoidal modulation
Configuration Define system simulation settings
Inport Convert Simulink input signal to SimRF signal
Outport Convert SimRF signal to Simulink output signals
Connection Port Connection port for RF subsystem
Ground Simulate connection to electrical ground

Examples and How To

Model System Noise Figure

RF receivers amplify signals and shift them to lower frequencies.

Model LO Phase Noise

A mixer transfers local oscillator (LO) phase noise directly to its output.

Designing a Receiver with an ADC

Most RF receivers in modern communications or radar systems feed signals to an analog-to-digital converter (ADC).

RF Noise Modeling

This example shows how to use the SimRF™ Circuit Envelope library to simulate noise and calculate noise power.

Impact of an RF Receiver on Communication System Performance

This example shows how to use the SimRF™ Circuit Envelope library to measure the effect of noise figure on bit error rate (BER) of a SimRF RF receiver model and to verify the result by comparing to a Communications System Toolbox™ reference model.


Noise in RF Systems

Noise factor, noise figure, noise floor, thermal noise power, noise temperature, white noise, colored noise

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