Real-Time Vehicular Wireless System-Level Simulation

Real-Time Vehicular Wireless System-Level Simulation

Blog Article

Future automation and control units for advanced driver assistance systems (ADAS) will exchange sensor and kinematic data with nearby vehicles using Grill / Griddle Stones wireless communication links to improve traffic safety.In this paper we present 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 hair balm for a pre-defined set of discrete grid points of the parameter vector using a channel emulator 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.

We validate our methodology using empirical measurement data from a street crossing scenarios demonstrating a close match in terms of FER between simulation and measurement.