Propagation and Channel Models
RF path propagation modeling describes the behavior of electromagnetic radiation from a point of transmission as the signal travels through the surrounding environment. Model RF propagation paths and visualize them in 3-D.
Channel modeling describes the over-the-air environment in communications system links. Analysis of propagation and channel modelling is essential in understanding how electromagnetic waves incur losses from a transmitter to a receiver in different scenarios. Model and visualize noisy SISO and MIMO channels that have Rayleigh, Rician, or WINNER II fading profiles. Atmospheric impairments and multiple Doppler spectrum shapes are also available.
|Add custom basemap|
|Add custom terrain data|
|Remove custom basemap|
|Remove custom terrain data|
|Show site in Site Viewer|
|Hide site from Site Viewer|
|Distance between sites|
|Angle between sites|
|Elevation of site|
|Coordinates at distance and angle from site|
Propagation and Visualization
|Display or compute coverage map|
|Display antenna radiation pattern in Site Viewer|
|Display or compute signal-to-interference-plus-noise (SINR) ratio|
|Display or compute communication link status|
|Received signal strength|
|Display or compute RF propagation rays|
|Display or compute line-of-sight (LOS) visibility status|
|Create RF propagation model|
|Path loss of radio wave propagation|
|RF signal attenuation due to rainfall using Crane model|
|RF signal attenuation due to rainfall|
|RF signal attenuation due to atmospheric gases|
|RF signal attenuation due to fog and clouds|
|Free space path loss|
|Path loss and phase change for RF propagation ray|
|Permittivity and conductivity of building materials|
|Permittivity and conductivity of earth surface materials|
|Add white Gaussian noise to signal|
|Binary symmetric channel|
|Convert SNR values|
|Construct channel System object from set of standardized channel models|
WINNER II Channel
|Create antenna array|
|Calculate field pattern of half-wavelength dipole|
|WINNER II layout parameter configuration|
|Generate channel coefficients using WINNER II channel model|
|WINNER II model parameter configuration|
|Construct Doppler spectrum structure|
Coordinate System Transformations
|Range and angle calculation|
|Convert global to local coordinates|
|Convert local to global coordinates|
|Convert vector from Cartesian components to spherical representation|
|Convert vector from spherical basis components to Cartesian components|
|Create RF transmitter site|
|Create RF receiver site|
|Create Site Viewer|
|Create phased array configuration|
|Free space propagation model|
|Rain propagation model|
|Gas propagation model|
|Fog propagation model|
|Close-in propagation model|
|Longley-Rice propagation model|
|Ray tracing propagation model|
|Add white Gaussian noise to input signal|
|Filter signal through multipath fading channel defined by propagation rays|
|Filter input signal through multipath Rayleigh fading channel|
|Filter input signal through multipath Rician fading channel|
|Filter input signal through MIMO multipath fading channel|
|Filter input signal through WINNER II fading channel|
|Add white Gaussian noise to input signal with GPU|
|Filter signal using multipath gains at specified path delays|
|Add thermal noise to signal|
- Choose a Propagation Model
When to use the different propagation models based on frequency, type, and limitations.
- RF Propagation and Visualization
Visualize coverage maps, SINR maps, and propagation paths in outdoor and indoor environments.
- Ray Tracing for Wireless Communications
Ray tracing models predict propagation paths and corresponding losses using 3-D environment geometry and electromagnetic analysis.
- 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.
- Channel Visualization
These channel modeling System objects and blocks in Communications Toolbox™ include an option to visualize the characteristics of a fading channel.
- WINNER II Channel
Model the WINNER II channel using the WINNER II Channel Model for Communications Toolbox add-on.