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Modelling multiple reflections inside materials, using ray-tracing technique and Geometrical Optics (GO), is very important when deterministic propagation modelling is used in indoor environments. Indeed, when an electromagnetic wave undergoes a transmission or a reflection, the thickness of the interacting material has to be taken into account to model the wave propagation in an accurate way. Most...
This paper presents a 3D-RT simulator which allows indoor radio wave propagation modeling for multi-standard systems, including UWB. It focuses on the issue of simulation of deterministic radio channel with realistic antenna behavior. Vector Spherical Harmonics (VSH) expansion of antenna radiation vector function is used to have efficient data access, good compression factor, and fast waveform reconstruction.
This paper presents a method for searching the exact rays between a Transmitter and a Receiver when a ray interacts with a material inside which multiple reflections can occur. Indeed, when considering building materials with a certain thickness, the ray-tracing algorithms often consider that the transmitted rays are not deflected, and the reflected rays are only subject to specular reflection. Therefore,...
RT (ray tracing) tools are commonly used to simulate UWB-IR (ultra wideband-impulse radio) propagation channel for different applications like network optimization, interference monitoring, or localization based applications. In this paper, different methods of reconstructing received signal in RT tools are presented, concluding that they are not all equivalent from digital implementation point of...
In order to consider the effects of antennas in UWB (ultra wideband) channel simulation, it is necessary to describe the antenna radiation pattern over 4pi-steradians, within the entire frequency band. This leads to a very large amount of data and hugely increases computation time, especially when working with a RT (ray tracing) based propagation simulator that only needs antenna data for a finite...
This paper reports a deterministic channel model for impulse radio (IR) applications. The ultra wide band received signal is built by using ray tracing combined with geometrical optics (GO) and uniform theory of diffraction (UTD). It takes into account realistic antennas dependencies. Some challenges and applications of deterministic Impulse radio channel simulation are discussed.
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