Documentation

This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

Channel Modeling and RF Impairments

AWGN, Rayleigh, Rician, MIMO, phase noise, frequency offset, nonlinearities

Communications System Toolbox™ enables you to model and visualize noisy SISO and MIMO channels having Rayleigh or Rician fading profiles. Multiple Doppler spectrum shapes are available. In addition, you can model RF impairments arising from actual hardware implementation.

System Objects

comm.AWGNChannel Add white Gaussian noise to input signal
comm.RayleighChannel Filter input signal through a Rayleigh multipath fading channel
comm.RicianChannel Filter input signal through a Rician fading channel
comm.MIMOChannel Filter input signal through MIMO multipath fading channel
comm.LTEMIMOChannel Filter input signal through LTE MIMO multipath fading channel
comm.BinarySymmetricChannel Introduce binary errors
comm.gpu.AWGNChannel Add white Gaussian noise to input signal with GPU
comm.MemorylessNonlinearity Apply memoryless nonlinearity to input signal
comm.PhaseFrequencyOffset Apply phase and frequency offsets to input signal
comm.PhaseNoise Apply phase noise to complex, baseband signal
comm.ThermalNoise Add thermal noise to signal

Blocks

AWGN Channel Add white Gaussian noise to input signal
Multipath Rayleigh Fading Channel Simulate multipath Rayleigh fading propagation channel
Multipath Rician Fading Channel Simulate multipath Rician fading propagation channel
MIMO Channel Filter input signal through MIMO multipath fading channel
Binary Symmetric Channel Introduce binary errors
I/Q Imbalance Create complex baseband model of signal impairments caused by imbalances between in-phase and quadrature receiver components
Memoryless Nonlinearity Apply memoryless nonlinearity to complex baseband signal
Phase/Frequency Offset Apply phase and frequency offsets to complex baseband signal
Phase Noise Apply receiver phase noise to complex baseband signal
Free Space Path Loss Reduce amplitude of input signal by amount specified
Receiver Thermal Noise Apply receiver thermal noise to complex baseband signal
Complex Phase Difference Output phase difference between two complex input signals
Complex Phase Shift Shift phase of complex input signal by second input value

Functions

awgn Add white Gaussian noise to signal
iqimbal Apply I/Q imbalance to input signal
bsc Model binary symmetric channel
filter Filter signal with channel object
rayleighchan Construct Rayleigh fading channel object
ricianchan Construct Rician fading channel object
stdchan Construct channel object from set of standardized channel models
legacychannelsim Toggles random number generation mode for channel objects
reset Reset channel object
doppler Construct Doppler spectrum structure
doppler.ajakes Construct asymmetrical Doppler spectrum object
doppler.bell Construct bell-shaped Doppler spectrum object
doppler.bigaussian Construct bi-Gaussian Doppler spectrum object
doppler.flat Construct flat Doppler spectrum object
doppler.gaussian Construct Gaussian Doppler spectrum object
doppler.jakes Construct Jakes Doppler spectrum object
doppler.rjakes Construct restricted Jakes Doppler spectrum object
doppler.rounded Construct rounded Doppler spectrum object
plot (channel) Plot channel characteristics with channel visualization tool
plotPhaseNoiseFilter Plot response of phase noise filter block

Topics

AWGN Channel

Model channel and RF impairment characteristics

Configure Eb/No for AWGN Channels with Coding

This example shows how to set the bit energy to noise density ratio (Eb/No) for communication links employing channel coding.

Fading Channels

Defining a fading channel object and applying it to a signal

Visualize Effects of Frequency-Selective Fading

Pass FSK and QPSK signals through a Rayleigh multipath fading channel.

MIMO Channel

The Communications System Toolbox software provides a Multiple Input Multiple Output (MIMO) Multipath Fading Channel System object™.

RF Impairments

Modeling impairments to a baseband signal caused by the radio frequency components

Visualize RF Impairments

Apply various RF impairments to a QAM signal.

Was this topic helpful?