Three-dimensional modeling of 900-MHz and 2.44-GHz radio propagation in corridors

Abstract

A three-dimensional (3-D) propagation model, combined with a patched-wall model, has been developed to predict radio loss in a corridor environment. The ray-tracing technique is used and combined with the ray-fixed coordinate system to simplify the computations of transmission, reflection, and diffraction coefficients in 3-D space. The computed path loss is compared with the measured value of 900-MHz and 2.44-GHz radio propagation along a hallway and gives a reasonable agreement. It is also found that the fields transmitted through the interior walls give the major contribution to the received field when the radio path lies around a corner.

Propagation model based on ray tracing for the design of personal communication systems in indoor environments

“…At the moment, deterministic models are becoming more popular [5]- [10]. For example, we can start by mentioning [5], where a computer tool to predict path loss inside buildings The authors are with Grupo de Servicios, Universidad de Alcalá, Alcalá de Henares 28806 Spain (e-mail: felipe.catedra@alcala.es).…”

Propagation Models for the Characterization of the Indoor UWB Channel

“…In the last decades, significant effort has been focused on the characterization of the indoor channel for narrowband systems. Statistical (Motley & Keenan, 1990;Saleh & Valenzuela, 1987;Seidel & Rappaport, 1992;Tornevik et al, 1993) and deterministic (Lauer et al, 1984;Saez de Adana et al, 2000;Tarng et al, 1997;Whitman et al, 1995) models have been used most frequently in these studies. The statistical models are based on the obtention of closed formulas to characterize the propagation channel.…”

“…These formulas are derived from the data obtained from measurement campaigns in different environments. Alternatively, the deterministic models are based mostly on the use of ray-tracing techniques (Saez de Adana et al, 2000;Tarng et al, 1997;Whitman et al, 1995) to predict the multipath phenomena and the Uniform Theory of Diffraction (UTD) technique (Kouyoumjian & Pathak, 1974) to calculate the received power or the propagation losses. However, the features of the UWB systems (with bandwidth in the range of GHz) render the conventional narrowband propagation models, both statistical and deterministic, inapplicable.…”

In Situ Measurements of the Complex Permittivity of Materials Using Reflection Ellipsometry in the Microwave Band: Theory (Part I)

“…Supposing that the signal of the detector is a linear function of the received power, the detected power is given by (9) where and denote, respectively, the detected powers relative to the two components of the incident electric field , as projected on the (p) and (s) polarization axes of the receiving antenna. Thus (10) where and are the polarization angles of the transmitting and receiving antennas, respectively.…”