Results 261 to 270 of about 404,248 (295)

Propagation models in radio environment map design

2018 Baltic URSI Symposium (URSI), 2018
Radio Environment Map is a very important element of Dynamic Spectrum Management. It is used by spectrum regulators, wireless networks planners, operators, and Cognitive Radio users. REM is an information system, in which the electromagnetic field strength in every space location for whole usable spectrum is a main data to evaluate spectrum occupancy ...
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Characterizing WLAN Medium Utilization for Radio Environment Maps

2011 IEEE Vehicular Technology Conference (VTC Fall), 2011
This paper explores the possibility to use the medium utilization as a metric to be included in Radio Environment Maps (REMs) of WLAN networks. The main objective is to build REMs that go beyond the spectrum use and that can be used to improve deployment and operation of WLANs.
Marc Portoles-Comeras, Christian Ibars, Jose Nunez-Martinez, Josep Mangues-Bafalluy   +3 more
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Constructing radio environment maps with heterogeneous spectrum sensors

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN), 2011
In this demonstration proposal we describe a prototype of a radio environment map (REM) for storing and reasoning about spectrum data obtained from heterogeneous sources. The architecture of the REM prototype is both modular and extendible, and can be used with very diverse spectrum sensors, ranging from high-fidelity spectrum analyzers to dedicated ...
Vladimir Atanasovski, Jaap van de Beek, Antoine Dejonghe, Daniel Denkovski, Liljana Gavrilovska, Sebastien Grimoud, Petri Mahonen, Mihajlo Pavloski, Valentin Rakovic, Janne Riihijarvi, Berna Sayrac   +10 more
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Distributed estimation and tracking for radio environment mapping

2014 American Control Conference, 2014
We study distributed estimation and tracking for radio environment mapping (REM). Comparing to existing REM using centralized methods, we provide a distributed solution eliminating the central station for map construction. Based on the random field model of the REM with shadow fading effects, we adopt consensus-based Kalman filter to estimate and track
Ruofan Kong, Wenlin Zhang, Yi Guo
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Indirect Methods for Constructing Radio Environment Map

2017
To solve the spectrum scarcity problem caused by the high number of wireless applications and users, the concept of cognitive radio (CR) was proposed in the past few years. Cognitive radio networks (CRNs) provide dynamic spectrum access (DSA), where the unlicensed users can access the spectrum without causing unacceptable level of interference to the ...
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Crowdsourced Radio Environment Mapping by Exploiting Machine Learning

2019 22nd International Symposium on Wireless Personal Multimedia Communications (WPMC), 2019
Accurate and cost-efficient radio environment mapping (REM) is of great importance to realize dynamic spectrum sharing. Two kinds of existing approaches, i.e., propagation model based approach and sensor monitoring based approach, are suffering from either inaccurate spectrum availability or high deployment cost.
Mina Akimoto, Xiaoyan Wang, Masahiro Umehira, Yusheng Ji   +3 more
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Mapping commercial ATM to the tactical radio environment

IEEE Military Communications Conference. Proceedings. MILCOM 98 (Cat. No.98CH36201), 2002
ATM technology offers the same technical advantages to the military user as to the civil user. ATM offers the additional advantage to the military user in that the considerable research and development investment in ATM is shared with the large non-military marketplace. The use of ATM in the tactical arena presents some unique challenges. These include
R. Barfoot, D. Camm, J. Daniell, P. Thorlby   +3 more
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Enabling Cognitive Radios through Radio Environment Maps

2014
Ph. D.
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Radio Environment Map Construction: A Mini-Review

2023 2nd International Conference on Multidisciplinary Engineering and Applied Science (ICMEAS), 2023
Oluwatobi E. Dare, Kennedy Okokpujie, Emmanuel Adetiba   +2 more
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Recent Advances in Radio Environment Map: A Survey

2018
Electromagnetic spectrum, the main medium of wireless communication has been over-crowded. Accompanied by the arrival of big data era, the problem of the spectrum scarcity has received people’s attention. The emergence of cognitive radio improves the utilization of the spectrum and provides an effective solution to break the limitations of the ...
Jingming Li, Guoru Ding, Xiaofei Zhang, Qihui Wu   +3 more
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