CONTRIBUTIONS TO THE CHARACTERIZATION OF THE INDOOR GPS PROPAGATION CHANNEL

2013 ◽  
Author(s):  
Alexandru Rusu
Keyword(s):  
Propagation Channel

scholarly journals Characterization of Path Loss and Large-Scale Fading for Rapid Intervention Team Communication in Underground Parking Garages

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2431 ◽  
Author(s):  
Seppe Van Brandt ◽  
Robbe Van Thielen ◽  
Jo Verhaevert ◽  
Tanja Van Hecke ◽  
Hendrik Rogier
Keyword(s):  
Large Scale ◽  
Path Loss ◽  
Wireless Channel ◽  
Building Structure ◽  
Propagation Channel ◽  
Parking Garage ◽  
High Penetration ◽  
Parking Garages ◽  
Intervention Team

This paper reports the characterization of the 2.45-GHz-ISM-band radio wave propagation channel. Specifically, measurements were performed in an underground parking garage, with the aim of optimizing breadcrumb systems for a Rapid Intervention Team application. The effects of the high penetration loss and large reflections by the concrete reinforced building structure on the path loss and the large-scale fading were studied. Based on the analysis of the wireless channel, critical points for reliable communication between members of a Rapid Intervention Team were identified. In particular, attention was paid to dealing with large, spatially confined signal losses due to shadowing, the anticipation of corner losses and the ability of the system to operate on multiple floors.

Characterization of MIMO propagation channel at 15 GHz for the 5G spectrum

2017 ◽  
Author(s):  
Faizan Qamar ◽  
Talib Abbas ◽  
Mhd Nour Hindia ◽  
Kaharudin Bin Dimyati ◽  
Kamarul Ariffin Bin Noordin ◽  
...  
Keyword(s):  
Propagation Channel

scholarly journals Modeling and Characterization of the Uplink and Downlink Exposure in Wireless Networks

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Anis Krayni ◽  
Abdelhamid Hadjem ◽  
Günter Vermeeren ◽  
Alain Sibille ◽  
Christophe Roblin ◽  
...  
Keyword(s):  
Exposure Assessment ◽  
Polynomial Chaos ◽  
Base Station ◽  
Propagation Channel ◽  
Wave Interactions ◽  
Single Plane ◽  
Electromagnetic Simulations ◽  
Wireless Device ◽  
Fdtd Simulations

This paper deals with a new methodology to assess the exposure induced by both uplink and downlink of a cellular network using 3D electromagnetic simulations. It aims to analyze together the exposure induced by a personal device (uplink exposure) and that induced by a base station (downlink exposure). The study involved the major parameters contributing to variability and uncertainty in exposure assessment, such as the user’s posture, the type of wireless device, and the propagation environment. Our approach is relying basically on the modeling of the power radiated by the personal device and the ambient electric field, while taking into account the effects of human body shadowing and the propagation channel fluctuations. The exposure assessment as well as the human-wave interactions has been simulated using the finite difference in time domain method (FDTD). In uplink scenarios, four FDTD simulations were performed with a child model, used in two postures (sitting and standing) and in two usage scenarios (voice and data), which aimed to examine the exposure induced by a mobile phone and a tablet emitting, respectively, at 900 MHz and 1940 MHz. In the downlink scenario, a series of FDTD simulations of an exposure to a single plane wave and multiplane waves have been conducted, and an efficient metamodeling of the exposure using the Polynomial Chaos approach has been developed.

Land vehicular propagation channel characterization of BGAN system

2008 ◽  
Vol 26 (2) ◽  
pp. 85-117 ◽  
Author(s):  
Elvio Gambaruto ◽  
M. Richharia ◽  
Eyal Trachtman
Keyword(s):  
Propagation Channel ◽  
Channel Characterization

scholarly journals Characterization of Near-Ground Radio Propagation Channel for Wireless Sensor Network with Application in Smart Agriculture

Proceedings ◽  
2017 ◽  
Vol 2 (3) ◽  
pp. 110
Author(s):  
Hicham Klaina ◽  
Ana Alejos ◽  
Otman Aghzout ◽  
Francisco Falcone
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Radio Propagation ◽  
Wireless Sensor ◽  
Propagation Channel ◽  
Smart Agriculture
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