Multilayer Wall Correction Factors for Indoor Ray-Tracing Radio Propagation Modeling

A single-layer or multilayer wall with thickness can be modeled accurately and efficiently as one infinitesimally thin patch in ray tracing by using correction factors to compensate for the ray path errors. This communication presents the correction factors to be used with the classical multiple-dielectric-interface reflection and transmission coefficients, for reflected, transmitted, and diffracted ray paths. It is shown that, with the aid of the correction factors, the ray-tracing simulation of an indoor scene with a penetrable hollow wedge formed by multilayer walls can produce results that match the 3-D full-wave results.