Results 11 to 20 of about 262,424 (257)
Designing for the Secondary User Experience [PDF]
, 2011 Computer systems are first and foremost designed for primary users. The needs of the other types of users, such as secondary users, are often overlooked. These users are not interacting with the system directly but are yet affected by it. This study is based on empirical findings from two usability evaluations in a realistic hospital setting with ...
Alsos, Ole Andreas, Svanæs, Dag
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Dynamic spectrum access and sharing through actor-critic deep reinforcement learning
EURASIP Journal on Wireless Communications and Networking, 2022 When primary users of the spectrum use frequency channels intermittently, secondary users can selectively transmit without interfering with the primary users.
Liang Dong, Yuchen Qian, Yuan Xing
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Monopoly-Market-Based Cooperation in Cognitive Radio Networks
Journal of Communications Software and Systems, 2020 In a cognitive radio network (CRN), the primary users (PUs) do not operate their spectra, full time. Thus, they can sell them to the secondary users (SUs), for a second use, during the free time slots.
Said Lakhal, Zouhair Guennoun
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South African Computer Journal, 2019 Cognitive radio network, which enables dynamic spectrum access, addresses the scarcity of radio spectrum caused by ever-increasing demand for spectrum.
Sekgoari Semaka Mapunya +1 more
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Secondary User Interference Characterization for Underlay Networks [PDF]
2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall), 2015 In an underlay cognitive radio network, the secondary (underlay) transmitters generate interference to a primary receiver, while an underlay receiver is subject to interference from both the primary transmitters and other underlay transmitters not associated with it.
Sachitha Kusaladharma +2 more
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Optimal Spectrum Sensor Assignment in Multi-channel Multi-user Cognitive Radio Networks
Journal of Telecommunications and Information Technology, 2018 Accurate detection of spectrum holes is the most important and critical task in any cognitive radio (CR) communication system. When a single spectrum sensor is assigned to detect a specific primary channel, then the detection may be unreliable because of
Nandini K. S., S. A. Hariprasad
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Spectrum allocation in cognitive radio networks using chaotic biogeography‐based optimisation
IET Networks, 2018 Cognitive radio networks are a promising technology for the improvement of the spectrum utilisation. The basic idea is to maximise the utilisation of the available spectrum by dynamically assigning available channels to secondary users.
Thomas I. Tegou +7 more
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Primary User Localization and Its Error Analysis in 5G Cognitive Radio Networks
Sensors, 2019 It is crucial to estimate the location of primary users (PUs) for the development of cognitive radio networks (CRNs). Great efforts have been made in the past to develop localization algorithms with better accuracy but low computation.
Nasir Saeed +3 more
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Modified Erlang Loss System for Cognitive Wireless Networks
Mathematics, 2022 This paper considers a modified Erlang loss system for cognitive wireless networks and related applications. A primary user has pre-emptive priority over secondary users, and the primary customer is lost if upon arrival all the channels are used by other
Evsey Morozov +3 more
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Matching Theory Based Physical Layer Secure Transmission Strategy for Cognitive Radio Networks
IEEE Access, 2021 In this paper, a cooperative secure transmission strategy is proposed for cognitive radio networks (CRNs) comprising of multiple primary users (PUs), multiple secondary users (SUs) and malicious eavesdroppers.
Zhou Tian +4 more
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