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 - see
picture on the right. The increasing complexity of sensor
systems and the large amount of cables needed are
reasons to look for other transmission ways. One way is
to replace the wired transmission channels by high
frequency radio links. Each sensor chip inside the
vehicle will transmit 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 are responsible for security
issues. To examine the reliability of such radio
channels is the main focus.
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Complex cabling in an airplane.
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The Points of Interest
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Focus of the investigations is the radio channel in the
interior of a vehicle. The radio link is mainly
characterized with the channel impulse response (CIR).
For the investigation of the CIR and the propagation
paths in the interior, AWE Communications' prediction
model Intelligent Ray Tracing (IRT) is used. A typical
3D CIR of a prediction inside a vehicle is shown in the
figure below. |
Directional Channel Impulse Response (CIR) computed with the 3D
Ray Tracing.
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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 database manager
WallMan is able to read and convert many popular 3D
CAD file formats to the WinProp file format.
More information about the vehicle databases can be
found here. |
3D CAD model used for a prediction.
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3D Ray Tracing Propagation Model
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An improved 3D Ray Tracing is used to compute the
scenarios inside and around cars. More information about
the prediction model can be found
here. |
