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.

Blocks

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Elements

Amplifier	Model amplifier in RF systems
Resistor	Model resistor for circuit envelope analysis
Mixer	Model mixer in RF systems
IMT Mixer	Model mixer using intermodulation table (IMT)
S-Parameters	Model S-parameter network

Testbenches

Noise Figure Testbench

Measures noise figure of system

Sources

Noise	Model noise using current or voltage noise source in RF systems
Continuous Wave	Model constant envelope source

Utilities

Configuration

Define system simulation settings

Topics

Model System Noise Figure

RF receivers amplify signals and shift them to lower frequencies.

Design Receiver with ADC

Design RF Receiver using ADC.

Noise in RF Systems

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

Featured Examples

RF Noise Modeling

Use the RF Blockset™ Circuit Envelope library to simulate noise and calculate noise power. Results are compared against theoretical calculations and a Communications Toolbox™ reference model.

Open Script

Model LO Phase Noise

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

Open Script

Spot Noise Data in Amplifiers and Effects on Measured Noise Figure

A test bench model to describe the noise introduced by a 2-port device.

Open Script

Explicitly Simulate Resistor Thermal Noise

Use the Noise block to calculate the classic thermal noise floor, kT, for a matched resistor circuit. Model configuration is as follows: Time step of the model is 1e-6 and frequency is 2 GHz.

Open Script