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This paper aims to provide a practical validation of an hybrid technique which has been developed for predicting radiated fields in complex environments [1]. Such a technique can be used for many situation of practical relevance, and is more particularly convenient to calculate the field radiated by BTS antennas for mobile communications. Such antennas can be easily characterized in free space, either...
Monitoring of people electromagnetic waves exposure to mobile telephony base stations is of interest for local communities, in order to communicate towards inhabitants or to enforce local exposure rules. This could be achieved with measurements but they quickly become outdated due to the ever changing network. Furthermore this could be very expensive for a large number of measurement spots. On the...
Numerical simulation is now widely used for modeling of exposure to electromagnetic fields in urban areas, especially in the case of mobile telephony base stations exposure. This is due to the ever-increasing power of computation tools and to the quantity and the quality of available topographic data. The results of such simulations have more and more weight as they allow consultation between the...
Ray-tracing is a suitable method for electric field exposure computation in large urban areas and is used for risks assessment and support for public decision. In this paper we focus on uncertainties analysis in such ray-tracing methods. First we classify uncertainties into subsets (emitters, environment and method related). We then identify characteristic reception areas and discuss about uncertainties...
In this paper we propose a method to specify a robust and energy efficiency physical layer for wireless sensor networks. Thus, from an energy model we show the influence of the channel on energy consumption. Our channel model is a realistic propagation model that takes into account all environmental specificity (geometric, electric) according to a real environment. The Bit Error Rate (BER) is used...
In this paper, we propose an extension of the energy model, and show the influence of the channel on energy consumption. Simulation results show that significant gains are obtained by adjusting the transmission power in function of the kind of link between the central node and individual nodes. Future works are dedicated to develop a cross-layer approach based on the presented works. Indeed, once...
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