Comparison of a Fast Analytical Ray Tracer and Channel-Sounder Measurements for V2V Communications

Ray optical path loss predictions for Ad-hoc networks (Device-to-Device) are still a complex and time consuming task. In past publications we introduced a new predictor concept that is based on visibility analysis, leading to a huge predictor speed up for the computation of reflected rays. In this paper we present our newest extensions of the simulation framework, introducing a methodology to apply the same visibility concept on side-building diffraction and non-specular reflection. Although the computation of scattered rays is not real time capable, our approach is fast enough to be applied on scenarios with a realistic number of communication pairs in the future. We evaluated our predictor by applying the model on an intersection scenario for the first time and comparing the result with a measurement campaign performed in 2009 in the Swedish city Lund. The resulting Power Delay Profile offers a good agreement between measurement and simulations, however we could observe differences in the power distribution based on non-specular reflection in the Non-Line-of-Sight region.