Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 69, Issue 6, Pages 3389-3398Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2020.3044373
Keywords
Surface roughness; Rough surfaces; Surface waves; Finite difference methods; Slabs; Time-domain analysis; Computational modeling; 5G; diffuse scattering (DS); FDTD; millimeter-wave (mm-wave) propagation modeling; ray tracing (RT); rough slabs
Funding
- Natural Sciences and Engineering Research Council of Canada [RGPIN-2018-04650]
- Onassis Foundation
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This study proposes a two-stage solution to incorporate diffuse scattering from rough surfaces into ray tracing models at millimeter-wave frequencies. By modeling reflection and transmission through rough slabs with the FDTD method and embedding diffuse scattering components into the ray tracer, accurate analysis of a 28 GHz indoor environment was achieved.
At millimeter-wave (mm-wave) frequencies, diffuse scattering (DS) from rough surfaces is an important propagation mechanism. Including this mechanism in radio propagation modeling tools, such as ray tracing (RT), is a key step toward realizing accurate propagation models for 5G and beyond systems. We propose a two-stage solution to this problem. First, we model reflection and transmission through rough slabs, such as doors, walls, and windows with the FDTD method. Our results indicate the influence of roughness and whether this influence is measurable, either reducing the magnitude of the reflected and transmitted waves or (most importantly) generating DS components. In the latter case, the surface effectively acts as a secondary source, whose pattern is computed by full-wave analysis. Then, this pattern is embedded in a ray tracer, enabling the computation and tracing of DS field components. We demonstrate this approach in the RT analysis of a 28 GHz indoor environment.
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