Motivation
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Nowadays, the exchange of data inside vehicles between numerous sensors
and several central processing units is done via wired communication
channels. The increasing complexity of
sensor systems and the large amount of cables needed are reasons to
look for other transmission possibilities. One way is to replace wired
transmissions by high frequency radio links. Then each sensor chip
inside a vehicle transmits its data to an array of antennas located in
the interior. An important point is the reliability of the radio links,
especially with regard to sensors or systems which belong to security
systems. So the main focus is to analyze the radio channel in terms of
reliability.
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Prediction
Model and Results
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Focus of the investigations is the radio channel in the interior of a
vehicle. The radio link is mainly characterized by the channel impulse
response (CIR). For the computation of the CIR and the wave propagation
paths in the interior a ray optical propagation model, such as the Intelligent Ray Tracing (IRT), is
necessary. A typical spatial CIR of a prediction inside a vehicle is
shown in the figure on the right.
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Spatial
Channel Impulse Response (CIR) computed with a 3D Ray Tracing
model
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Usage
of Vehicle Databases
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3D models of vehicles have to be available to accomplish predictions
described above. The tool WallMan
is able to read and convert many popular 3D CAD file formats to the
WinProp file format.
More
information about vehicle databases can be found at the corresponding database page.
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3D
CAD model used for a prediction
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