In this paper, we present a novel algorithm for improving the accuracy of ray tracing without modeling the source with high resolution. It is based on expressing each ray within a ray tube as a linear combination of three rays defining that ray tube...

The plan of the environment used in a ray tracing simulation is not usually in exact accordance with the actual environment plan. Errors on the order of several centimeters may be present in describing the lateral wall positions. Such errors...

The complex dielectric constants of building materials are present in the reflection, transmission and diffraction coefficients of the ray tracing formulation. Any deviation of the dielectric constants included in ray tracing simulation from...

A new acceleration technique is presented for shooting and bouncing ray tracing in indoor environments. Tracing just a few rays, the algorithm finds the solid angles around the transmitter that transport electromagnetic power to the receiver...

This study presents the modified wavefront decomposition method as a new ray-tracing acceleration technique for indoor propagation modelling. In this method, the exact propagation paths of the rays that reach the receiver after multiple reflections...

Eikonal solvers often have stability problems if the velocity model is mildly heterogeneous.
We derive a stable and compact form of the eikonal equation for P-wave
propagation in vertical transverse isotropic media. ...

Abstract—Site-specific ultrawideband propagation modeling involves dealing with frequency variations of the propagation mechanisms and antenna patterns in the ray tracing program. Typically, electromagnetic field calculations have to be performed...

In ray-tracing-based propagation modelling, the electromagnetic field at the receiver is obtained by coherent summation of the fields of multipath components. It is therefore crucial to accurately calculate the phase of the electromagnetic field...

This study presents a new ray tracing acceleration technique for site-specific propagation modelling in

indoor environments. It overcomes one of the major problems regarding the computational efficiency of...

In site-specific ultrawideband propagation modelling, electromagnetic field calculations need to be performed by ray tracing at numerous frequencies of the band in order to properly include the frequency variations of the propagation mechanisms...