An efficient ray-tracing method for radiopropagation based on the modified BSP algorithm

摘要

A new and efficient ray-tracing method based on the combination of the Image Theory and the Binary Space Partitioning (BSP) algorithm is presented. The efficiency of the method allows a full three-dimensional implementation of the GeometricalOptics and the Uniform Theory of Diffraction (GO/UTD). The optimization of ray-tracing makes it possible to take into account a great number of rays: reflected, diffracted and multiple combinations of these effects. This degree of precision in thecalculation of the signal levels permits to estimate accurately enough not only the signal mean level but also its statistics. The main feature of the method is the possibility of analyzing the radio channel in general enclosed spaces, including indoor,outdoor and mixed indoor/urban environments.