Channel Models

AWGN, SISO and MIMO fading channels, WINNER II, and path loss models

Communications Toolbox™ enables you to model and visualize noisy SISO and MIMO channels having Rayleigh, Rician, or WINNER II fading profiles. Atmospheric impairments and multiple Doppler spectrum shapes are available.

Functions

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awgnAdd white Gaussian noise to signal
bscBinary symmetric channel
stdchanConstruct channel System object from set of standardized channel models
cranerainplRF signal attenuation due to rainfall using Crane model
fogplRF signal attenuation due to fog and clouds
fsplFree space path loss
gasplRF signal attenuation due to atmospheric gases
rainplRF signal attenuation due to rainfall
winner2.AntennaArrayCreate antenna array
winner2.dipoleCalculate field pattern of half-wavelength dipole
winner2.layoutparsetWINNER II layout parameter configuration
winner2.wimGenerate channel coefficients using WINNER II channel model
winner2.wimparsetWINNER II model parameter configuration
dopplerConstruct Doppler spectrum structure
rangeangleRange and angle calculation
global2localcoordConvert global to local coordinates
local2globalcoordConvert local to global coordinates
cart2sphvecConvert vector from Cartesian components to spherical representation
sph2cartvecConvert vector from spherical basis components to Cartesian components

Objects

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comm.AWGNChannelAdd white Gaussian noise to input signal
comm.RayleighChannel Filter input signal through multipath Rayleigh fading channel
comm.RicianChannel Filter input signal through multipath Rician fading channel
comm.MIMOChannelFilter input signal through MIMO multipath fading channel
comm.WINNER2ChannelFilter input signal through WINNER II fading channel
comm.gpu.AWGNChannelAdd white Gaussian noise to input signal with GPU
comm.ThermalNoiseAdd thermal noise to signal

Blocks

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AWGN ChannelAdd white Gaussian noise to input signal
SISO Fading ChannelFilter input signal through SISO multipath fading channel
MIMO Fading ChannelFilter input signal through MIMO multipath fading channel
Binary Symmetric ChannelIntroduce binary errors
Free Space Path LossReduce amplitude of input signal by amount specified

Topics

Channel Modeling

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.

Using AWGN Channel Block for Coded Signals

Two links perform error control coding on a signal that has passed through an impairment channel.

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. Change the signal bandwidths to observe the impact of the fading channel on the FSK spectrum and the QPSK constellation.

Multiple-Input Multiple-Output (MIMO)

Learn about multiple-input multiple-output features of the Communications Toolbox software.

WINNER II Channel

Modeling WINNER II channel using the WINNER II Channel Model for Communications Toolbox add-on.

Model Gaussian Filter in Simulink

Use the gaussdesign function with the Discrete FIR Filter block to model Gaussian filtering in Simulink®.

Featured Examples