Results 11 to 20 of about 27,167 (293)
Application of Radio Environment Maps for Dynamic Broadband Access in TV Bands in Urban Areas
IEEE Access, 2017 Spectrum sharing based on the dedicated databases, particularly in the context of TV band, is widely considered as a promising tool for better spectrum utilization in the future wireless networks.
Adrian Kliks +5 more
doaj +2 more sources
An Improvement of Security Scheme for Radio Environment Map Under Massive Attacking [PDF]
IEEE Access, 2022 Radio environment maps (REM) are widely used to enhance communication efficiency in spatial spectrum sharing. This can be generated using reports from the terminals.
Ying Gao, Takeo Fujii
doaj +2 more sources
Indirect Methods for Constructing Radio Environment Map [PDF]
2018 IEEE Canadian Conference on Electrical & Computer Engineering (CCECE), 2018 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 ...
Safwan Alfattani, Abbas Yongaçoğlu
+5 more sources
IEEE Access, 2018 If the construction and maintenance of Wi-Fi radio maps (WRMs) were fully automated, the implementation of a global-scale Wi-Fi indoor positioning system would be possible.
Suk-Hoon Jung, Dongsoo Han
doaj +3 more sources
Radio Environment Maps: The Survey of Construction Methods [PDF]
KSII Transactions on Internet and Information Systems, 2014 Radio environment maps (REMs) and geolocation database represent an important source of information for the operation of cognitive radio networks, replacing or complementing spectrum sensing information. This paper provides a survey of methods for constructing the radio frequency layer of radio environment map (RF-REM) using distributed measurements of
Marko Pesko +4 more
openalex +2 more sources
Users’ QoS driven radio resources optimization based on radio environment map
Journal of Physics: Conference Series, 2019 Abstract The over the top service optimization in wireless networks is a challenging task due to the diversity of wireless terminals, variety of required quality of service requirements and diversity of wireless service access networks. In this paper, we propose an approach to optimize the allocation of users to wireless networks or even
Tomaž Javornik +3 more
openalex +2 more sources
MURM-A*: An Improved A* Within Comprehensive Path-Planning Scheme for Cellular-Connected Multi-UAVs Based on Radio Map and Complex Network [PDF]
SensorsFor the purpose of fulfilling the dual requirements of persistent cellular network connectivity and flight safety for cellular-connected Unmanned Aerial Vehicles (UAVs) operating in dense urban airspace, this paper presents an A*-oriented comprehensive ...
Yanming Chai +4 more
doaj +2 more sources
Limited Sampling Spatial Interpolation Evaluation for 3D Radio Environment Mapping
Sensors, 2023 The increasing densification and diversification of modern and upcoming wireless networks have become an important motivation for the development of agile spectrum sharing.
Antoni Ivanov +4 more
doaj +3 more sources
Spectrum Awareness in Cognitive Radio Systems [PDF]
International Journal of Electronics and Telecommunications, 2020 The paper addresses the issue of the Electromagnetic Environment Situational Awareness techniques. The main focus is put on sensing and the Radio Environment Map. These two dynamic techniques are described in detail.
M. Suchański +4 more
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DeepREM: Deep-Learning-Based Radio Environment Map Estimation From Sparse Measurements
IEEE Access, 2023 Radio environment maps depict the coverage area of cellular networks. They are usually estimated by interpolating sparse measurements gathered in test drives.
Andrea Chaves-Villota +1 more
doaj +1 more source