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Vehicular communication system level simulation

Future automation and control units for advanced driver assistance systems (ADAS) will exchange sensor and kinematic data with nearby vehicles using wireless communication links to improve traffic safety. AIT offers an accurate real-time system-level simulation for multi-vehicle communication scenarios to support the development and test of connected ADAS systems.

The physical and data-link layer are abstracted and provide the frame error rate (FER) to a network simulator. The FER is strongly affected by the non- stationary doubly dispersive fading process of the vehicular radio communication channel. We use a geometry-based stochastic channel model (GSCM) to enable a simplified but still accurate representation of the non-stationary vehicular fading process. The propagation path parameters of the GSCM are used to efficiently compute the time-variant condensed radio channel parameters per stationarity region of each communication link during run-time.

Five condensed radio channel parameters mainly determine the FER forming a parameter vector: path loss, root mean square delay spread, Doppler bandwidth, K- factor, and line-of-sight Doppler shift. We measure the FER for a pre-defined set of discrete grid points of the parameter vector using the AIT real time channel emulator (add link to topic “Real-time wireless channel emulation “ above) and a given transmitter-receiver modem pair. The FER data is stored in a table and looked up during run-time of the real-time system-level simulation. Our system level simulation is validated with empirical measurement data from various safety critical road traffic scenarios achieving a close match in terms of FER between simulation and measurement.

An easy extension to new scenarios for railways, industry 4.0 production and unmanned aerial vehicles (UAV) is offered by the AIT expert team.