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propagation and channel models -凯发k8网页登录

site and terrain visualization, propagation model specification (including longley-rice), signal strength, signal coverage maps, and static and fading 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.

functions

map data

add custom basemap
add custom terrain data
remove custom basemap
remove custom terrain data

site

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
pathlosspath loss of radio wave propagation

path loss

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

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

channel models

add white gaussian noise to signal
binary symmetric channel
construct channel system object from set of standardized channel models

channel utilities

channel timing delay
convert snr values
calculate ofdm channel response
construct doppler spectrum structure
create antenna array for winner ii channel model
calculate half-wavelength dipole field pattern for winner ii channel model
winner ii layout parameter configuration
generate channel coefficients using winner ii channel model
winner ii model parameter configuration

objects

sites

create rf transmitter site
create rf receiver site
create site viewer
create phased array configuration

propagation models

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

propagation data

create rf propagation data from measurements
create rf propagation ray

channel models

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

channel utilities

filter signal using multipath gains at specified path delays

blocks

apply free space path loss to complex signal

channel models

add white gaussian noise to input signal
introduce binary errors
filter input signal through mimo multipath fading channel
filter input signal through siso multipath fading channel

channel utilities

calculate ofdm channel response

topics

rf propagation


  • 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.

channel modeling


  • model channel and rf impairment characteristics.

  • this example shows how to set the bit energy to noise density ratio (eb/no) for communication links employing channel coding.

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

  • defining a fading channel object and applying it to a signal.

  • these channel modeling system objects and blocks in communications toolbox™ include an option to visualize the characteristics of a fading channel.

  • model the winner ii channel using the winner ii channel model for communications toolbox add-on.
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