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Application
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The propagation of electromagnetic
waves in tunnels differs significantly from the propagation in outdoor
environments. Therefore new approaches to the moedling of the scenario
are
required to obtain accurate prediction results.
WinProp offers a module to
work with tunnels. Arbitrary cross sections and curves inside tunnels
are possible and allow a very realistic simulation of the scenario.
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Calculation of
propagation paths
inside a tunnel with
WinProp.
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Due to the multiple reflections and
waveguiding effects inside tunnels,
the multipath propagation in tunnels is even more important than in
typical indoor scenarios. Simple empirical propagation models are
therefore not sufficient.
WinProp's indoor propagation models
can be used also in tunnel environments for cellular network planning
(picocells) as well as for LOS analysis.
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Propagation Models and Simulation
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Phenomena like reflection, diffraction and
shadowing in multi-path propagation have a significant influence on the
received power. So the propagation models
for tunnel scenarios should consider these
phenomena to obtain accurate
propagation results.
WinProp offers a wide variety of empirical and ray optical propagation models for tunnel scenarios.
The tunnel databases are stored in WinProp's 3D planar object database
format - so all indoor
propagation models can be used for the prediction of the wave
propagation in tunnels.
Of course single antennas with their specific
antenna patterns can be
used as well as radiating cables (leaky feeder cables).
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Propagation in a
tunnel
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Even time
variant scenarios can be modeld incl. tunnels, so the effect of
time-invariant antennas (on top of a car, train, etc.) inside
a tunnel and the interaction with further time-variant objetcs (cars,
trains,...) can be visualized.
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