Propagation
Models
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The tunnel
scenarios are saved in WinProp's
planar object database
format. Therefore all
indoor propagation models can be used.
Due to the multiple reflections and waveguiding effects,
especially deterministic and ray-optical propagation models
are recommended.
The following propagation models can be used:
Empirical Models (not recommended for curved tunnels):
Ray Optical
Propagation Models (recommended for all tunnels):
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Prediction in a
tunnel
Ray-optical prediction in a tunnel
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Leaky Feeder
Cables
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Leaky feeder
cables are very often used for the coverage inside tunnels.
WinProp supports single antenna transmitters as well as
leaky feeder cables.
Prediction in a curved tunnel, covered with a leaky feeder
cable
(Click to enlarge)
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Ray optical prediction model used to
predict the scenario with a car in a tunnel
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Underground mines
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Besides street
and railway tunnels, WinProp is also able to predict the wave
propagation in underground mines.
Propagation paths in an underground mine
(Click to enlarge)
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Prediction in an underground mine
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Time-Variant
Scenarios
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Inside tunnels
the time-variant objects (e.g. cars, trucks, trains,...)
have a significant effect on the wave propagation. Shielding
and waveguiding are depending on the obstacles inside the
tunnels. If the obstacles are moving, the propagation
environment changes significantly.
Therefore WinProp offers a time-variant propagation module
to consider these time variant effects even in tunnels.
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Short video of a time
variant propagation result
(Click to enlarge)
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