Overtheair emulation of a twopath model for automotive LTE system performance testing Overtheair testing is, in combination with the concept of radio channel emulation, a feasible solution for the evaluation of automotive radio systems during every stage of development. Suitable and representative test scenarios need to be investigated, since it is impossible to completely test the multitude of potential radio environments, and real drive tests are very expensive, time consuming, and hardly reproducible. This paper proposes a basic twopath propagation model as a basis for performance testing because of its relevance in wireless communications and the potential to adjust worstcase transmission conditions. The model has been successfully implemented in our multipurpose test facility. The implementation has been verified by interference measurements in the signal domain at RF level. Measured values compare favourably with expectation. Application oriented verification has been achieved by creating a functional LTE link in our shielded anechoic chamber and has been used to conduct endtoend data throughput tests. The measured data throughput follows the expected interference pattern.

Interference Tests of ITSG5 VehicletoVehicle Communication Networks with Virtual Drive Tests Automotive communication systems have become a hot topic in the research field, especially with a focus towards connected vehicles. The potential of connected and automated driving promises an enormous increase of road safety and traffic efficiency. With this purpose, dedicated short range communication standards (e.g. ITSG5) have been developed. These standards share spectral resources among all communication partners, which necessitates an evaluation of inband interference. As one potentially powerful evaluation approach, the road and radio environment can be emulated instead of being accessed through fieldoperational tests, with major advantages like repeatability and convenience aspects. This paper describes a testing framework that employs a virtualdrive test approach for the evaluation of the performance of ITSG5 equipment. According to the concept of virtualdrive testing, the road and radio environments have been emulated with regards to a realworld drive track. Packet loss measurements are presented for the evaluation of interference effects present in the communication. The results indicate that the virtualdrive test approach is suitable for testing automotive communication systems.