Affiliations: Department of Information and Communication
Engineering, Fukuoka Institute of Technology, Higashi-Ku, Fukuoka, Japan | Graduate School of Engineering, Fukuoka Institute of
Technology, Higashi-Ku, Fukuoka, Japan | Surveillance and Communications Department, Electronic
Navigation Research Institute, Tokyo, Japan
Note: [] Corresponding author: Kazunori Uchida, Department of Information
and Communication Engineering, Fukuoka Institute of Technology (FIT), 3-30-1
Wajiro-Higashi, Higashi-Ku, Fukuoka 811-0295, Japan. E-mail: k-uchida@fit.ac.jp
Abstract: This paper is concerned with a numerical procedure to estimate two
parameters, amplitude modification factor α and
propagation order of distance β, for electromagnetic
(EM) propagation in complicated natural environments such as random rough
surface (RRS). These two parameters are key parameters when we simulate field
distributions along various types of RRS based on 1-ray model. We assume that
the former parameter α can be evaluated by the visual
planar angles of illuminated lines in case of 1D RRS and by the visual solid
angles of illuminated planes in case of 2D RRS. We also assume that the latter
parameter β can be estimated not only by base station
(BS) antenna height, similar to Okumura-Hata model simulating EM propagation in
urban and suburban areas, but also by mobile station (MS) antenna height. In
order to demonstrate validity of the proposed parameter estimation, we compare
the numerical field distributions obtained by the 1-ray model using estimated
two parameters with those computed by discrete ray tracing method (DRTM) which
is an effective EM field solver. It is shown that both numerical results are in good agreement.
Keywords: Propagation, random rough surface, 1-ray model, field estimation, discrete ray tracing method
