Towards a Non-Stationary Correlated Fading Process for Diffuse Scattering in Ray Tracing

摘要: In this paper we introduce the AIT ray tracer (RT) that is able to accurately simulate propagation effects of wireless communication channels. It covers classical mechanisms such as specular reflections, transmission and edge-diffraction. The novelty our RT it allows obtain correlated diffuse scattering and, thus, provides a time-variant Doppler spectral density. This achieved by introducing lattice-based surface tiling, which does not alter position points during simulation but high resolution scattering. selection basis vectors for finite lattice ensures each falls into separate delay bin (at least first-order scattering). We implement using NVIDIA OptiX tracing engine, enables us trace vast amount rays in single pass. compare simulations measurement conducted non-stationary urban intersection scenario achieving near perfect match terms second order statistics.