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Nonlinear Modeling

Nonlinear elements, nonlinear behavior, intermodulation distortion, IP2/IP3, interference

Use these blocks to specify the nonlinear behavior of amplifiers and mixers. Such behavior includes IP2/IP3, intermodulation distortion and 1-dB compression. You can also simulate frequency-dependent mismatches between components.

Blocks

AmplifierModel amplifier in RF systems
ResistorModel resistor for circuit envelope analysis
Phase ShiftModel phase shift in RF systems
S-ParametersModel S-parameter network
MixerModel mixer in RF systems
Signal CombinerCompute sum of RF signals
CirculatorModel ideal frequency-independent circulators with S-parameters
CouplerModel ideal frequency-independent couplers with S-parameters
DividerModel ideal frequency-independent dividers (combiners) with S-parameters
IQ DemodulatorConvert RF signal to baseband signal
IQ ModulatorConvert baseband signal to RF signal
Continuous WaveModel constant envelope source
NoiseModel noise using current or voltage noise source in RF systems
SinusoidModel DC offset and sinusoidal modulation
ConfigurationDefine system simulation settings
InportConvert Simulink input signal to RF Blockset signal
OutportConvert RF Blockset signal to Simulink output signals
Connection PortConnection port for RF subsystem
GroundSimulate connection to electrical ground

Topics

Carrier To Interference Performance of Weaver Receiver

A classic superheterodyne architecture filters images prior to frequency conversion.

Validating IP2/IP3 Using Complex Signals

This example shows how to use the RF Blockset™ Circuit Envelope library to run a two-tone experiment that measures the second- and third-order intercept points of an amplifier.

Measuring Image Rejection Ratio in Receivers

This example shows how to use the RF Blockset™ Circuit Envelope library to calculate the image rejection ratio (IRR) for high-side-injection in Weaver and Hartley receivers.

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