Keller introduced his Geometrical Theory of Diffraction (GTD) in the 1950s. The Geometrical
Theory of Diffraction development was revolutionary, in that it explained the phenomena of …

A three-dimensional parallel implementation of the finite-difference time-domain (FDTD)
method has been used to identify and isolate the dominant propagation mechanisms in a …

The increase in mobile communications traffic has led to heightened interest in the use of
ray tracing (RT) methods together with digital building databases for obtaining more …

This article presents a heuristic diffraction coefficient for 3-D dielectric wedges of arbitrary
angles. First, the proposed diffraction coefficient is derived for 2-D wedges with soft and hard …

We discuss three sets of heuristic coefficients used in uniform theory of diffraction (UTD) to
characterize the electromagnetic scattering in realistic urban scenarios and canonical …

A new reciprocal heuristic diffraction coefficient for lossy dielectric wedge is presented which
is applicable to arbitrary positions of transmitter and receiver in a complex channel …

This paper presents a prediction formula of propagation loss for low antenna height
scenarios on a line-of-sight (LOS) straight-line road having an intersection, for modeling the …

This paper presents a 3D ray-tracing model using geometrical optics and the uniform theory
of diffraction in radio channel characterizations of macrocellular environments. On the basis …

Представлено решение задачи рассеяния на импедансном клине с использованием
асимптотически равномерной теории дифракции. Приведены уточняющие формулы …

In this study, heuristic uniform theory of diffraction coefficients are suited to account for
scattering by lossy conducting wedges. The novel heuristic solution is determined from other …