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This paper is related to the comparison between a 3D UTD (Uniform Theory of Diffraction) propagation model and NFC (Near Field Chamber) measurements, in a context of an antenna disturbed by a dielectric circular cylinder, referring to a “Scattering” case [1], i.e. a Transmitter and a Receiver “off” the cylinder. After the determination of the UTD model validity domain in terms of frequency and “antenna-cylinder”...
Most of the time, when an electromagnetic wave undergoes a transmission in indoor environments, the interacting material thickness is taken into account to model the wave propagation in an accurate way. Therefore, the wave is considered to undergo multiple reflections inside the material and these internal reflections have to be modelled if a deterministic propagation tool is used. But we can wonder...
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 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,...
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.
Ultra Wide Band (UWB) is an emergent technology which will be about to provide, in a near future, high data rates in indoor environments and location awareness in difficult propagation channels. In this context, UWB system designers need an accurate knowledge of the radio propagation channel for systems performance through link level simulations. In this way, the UWB channel knowledge can be modelled...
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