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Measurements of the 60 GHz UWB indoor channel done in a modern office building at the University of L'Aquila, Italy, are presented. The channel sounder is based on a PN-sequence correlation technique with a pulse width of 0.8 ns. Signals are recorded in different locations in line-of-sight and non-line-of-sight scenarios, and for each location the receiver is moved over a grid of 9×9 positions, in...
This letter investigates the effect of body movements on the ultrawideband (UWB) on-body radio channel. A measurement campaign was performed considering four different body-links, namely: belt-to-head, belt-to-chest, belt-to-wrist, and belt-to-ankle, with the subject performing movements of different nature, in order to cover a wide range of scenarios. Transient and spectral characteristics were extracted...
Recent advances in wireless data networks have opened many new applications including wireless monitoring and control of industrial environment. This paper presents the results of a study on the deployment of wireless network for monitoring and control in SABIC Al-Hadeed Steel Plant. Wireless channel characterization and technology evaluation are the two most critical issues in the design of wireless...
Several studies have characterized industrial environments as being highly reflective. In this paper, we provide the data obtained from electromagnetic field measurements performed at the warehouse of a paper mill. The data is also compared to simulated data. This data proves the existence of non-reflective and very high absorption industrial environments where wireless communication is impossible...
In this paper the complete state of the art of UWB is presented, ranging from the theory of the wireless channel, measurements, channel modeling the use of UWB in multiple antenna systems. This work presents preliminary results of a measurement campaign accomplished in the Technical University of Cartagena. Measurements were performed from 2 GHz to 5 GHz using a Vector Network Analyzer (VNA), and...
Near-ground wireless channels are becoming increasingly important for a number of applications. In this paper we add to the body of work on this topic, by quantifying small-scale near-ground channel fading characteristics in indoor environments, at 5 GHz. Results for delay spreads, multipath component persistence, and amplitude fading are used to develop models for this channel. As expected, the near-ground...
In this paper, the results of some ultra wideband (UWB) time-domain propagation measurements performed in modern laboratory (Lab) environments are presented. These measurements have been down for both line of site (LOS) and non-LOS (NLOS) scenarios. The measurement results are used to investigate temporal dispersion parameters of the channel. The appropriate model parameters are presented for UWB...
Three applications in wireless networks where model-free stochastic learning is applicable, are discussed. The learning based optimization problems are formulated and simulation results are presented. Some open issues are also discussed.
This paper investigates the effective gain of antennas in indoor channels. A metric called instantaneous effective gain is proposed, and a multiple-cluster 3D channel model is used to facilitate the proposed antenna effective gain. In the multiple-cluster channel model, Laplacian and double exponential distribution are utilized to model azimuth and elevation signal power distribution respectively,...
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