Introduction
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The mobile radio channel in indoor scenarios is characterized by
multi-path propagation. Dominant propagation phenomena inside buildings
are
- the shadowing of walls
- wave guiding effects in corridors due to
multiple reflections
- diffractions around vertical wedges.
The deterministic ray optical models of WinProp consider all these
effects which leads to highly accurate
prediction results. |
Propagation
paths in an indoor scenario.
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Propagation Paths
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Each penetration of a wall, each reflection at the surface of a wall
and each diffraction at a wedge is a interaction. The Standard Ray
Tracing considers all propagation paths which fulfill the following
criterions:
- up to 6 reflections
- up to 2 diffractions
- up to a total number of 6 interactions with a
combination of max. 6 reflections and max. 2 diffractions
Each propagation path can have an unlimited number of penetrations (of
walls).
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Predicted Results
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The 3D Standard Ray Tracing Propagation Model predicts many results
beyond signal level:
- delay spread
- power delay profile (channel impulse response)
- angular spread (at Tx and Rx location)
- angular profile (at Tx and Rx location)
- transmission matrix (for each ray)
- complex electric field strength vector (for
each ray)
- phase (for each ray)
All these results can be written into ASCII files for further
processing with other software tools.
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Superposition
of multiple propagation paths
In case of multiple rays between transmitter and receiver, the user can
select between two different algorithms for the superposition of the
rays. Either a coherent superposition (consideration of the phase) or
an incoherent superposition (power sum).
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Coherent
Superposition
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Incoherent
Superposition
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