AIT offers a ray tracing software (RT) that is able to accurately simulate propagation effects of wire- less communication channels. It covers the classical propagation mechanisms such as specular reflections, transmission, and edge- diffraction.

The novelty of our RT is that it allows to obtain correlated diffuse scattering and, thus, provides a time-variant Doppler spectral density characteristic for safety critical vehicular scenarios on railways, and streets. This is achieved by introducing a lattice- based surface tiling, which does not alter the position of the scattering points during simulation but provides high resolution diffuse scattering. The selection of the basis vectors for the finite lattice ensures that each ray falls into a separate delay bin (at least for first-order scattering).

The RT uses the NVIDIA OptiX ray tracing engine, this enables tracing a vast number of rays in a single pass. We validated the RT by empirical wireless communication channel measurement data including non-stationary urban safety critical traffic scenarios.