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FDTD-Based Diffuse Scattering and Transmission Models for Ray-Tracing of Millimeter-Wave Communication Systems

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Document pages: 10 pages

Abstract: At millimeter-wave frequencies, diffuse scattering from rough surfaces is animportant propagation mechanism. Including this mechanism in radio propagationmodeling tools,such as ray-tracing, is a key step towards realizing accuratepropagation models for 5G and beyond systems. We propose a two-stage solutionto this problem. First, we model reflection and transmission through roughslabs, such as doors, walls and windows with the FDTD method. Our resultsindicate the influence of roughness and whether this influence is measurable,either reducing the magnitude of the reflected and transmitted waves, or (mostimportantly) generating diffuse scattering components. In the latter case, thesurface effectively acts as a secondary source, whose pattern is computed byfull-wave analysis. Then, this pattern is embedded in a ray-tracer, enablingthe computation and tracing of diffuse scattering field components. Wedemonstrate this approach in the ray-tracing analysis of a 28 GHz indoorenvironment.

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