Results 201 to 210 of about 438,323 (269)
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IRS-Enhanced Energy Detection for Spectrum Sensing in Cognitive Radio Networks
IEEE Wireless Communications Letters, 2021Energy detection is of crucial importance in cognitive radio networks. However, its performance is poor when the channel fading is severe, which causes interference to the primary users.
Wei Wu +6 more
semanticscholar +1 more source
Proceedings of the 2016 workshop on Fostering Latin-American Research in Data Communication Networks, 2016
Cognitive Radio Networks have emerged in the last years as a solution for two problems: spectrum underutilization and spectrum scarcity. In this context we consider a paid-sharing approach where secondary users (SUs) pay for spectrum utilization. We assume a preemptive system where primary users (PUs) have strict priority over SUs; when a PU arrives to
Claudina Rattaro, Pablo Belzarena
+4 more sources
Cognitive Radio Networks have emerged in the last years as a solution for two problems: spectrum underutilization and spectrum scarcity. In this context we consider a paid-sharing approach where secondary users (SUs) pay for spectrum utilization. We assume a preemptive system where primary users (PUs) have strict priority over SUs; when a PU arrives to
Claudina Rattaro, Pablo Belzarena
+4 more sources
Cooperative Spectrum Sensing Optimization in Energy-Harvesting Cognitive Radio Networks
IEEE Transactions on Wireless Communications, 2020This article focuses on the issue of cooperative spectrum sensing (CSS) in a mobile energy-harvesting cognitive radio network (EH-CRN), where secondary transmitters (STs) are powered by the radio-frequency (RF) signal emitted from primary transmissions ...
Xiaoying Liu +3 more
semanticscholar +1 more source
IEEE Transactions on Cognitive Communications and Networking, 2020
Software Defined Radio (SDR)-enabled cognitive radio network architectures are expected to play an important role in the future 5G networks. Despite the increased research interest, the current implementations are of small-scale and provide limited ...
Grigorios Kakkavas +3 more
semanticscholar +1 more source
Software Defined Radio (SDR)-enabled cognitive radio network architectures are expected to play an important role in the future 5G networks. Despite the increased research interest, the current implementations are of small-scale and provide limited ...
Grigorios Kakkavas +3 more
semanticscholar +1 more source
Neural Network-Based Relay Selection in Two-Way SWIPT-Enabled Cognitive Radio Networks
IEEE Transactions on Vehicular Technology, 2020In this paper, we investigate the relay selection problem for two-way simultaneous wireless information and power transfer (SWIPT) enabled cognitive radio networks.
Zhi Zhang +3 more
semanticscholar +1 more source
IEEE Vehicular Technology Magazine, 2009
In this article, we are interested in an important paradigm of secondary systems known as cognitive radio (CR) networks where the secondary terminals are envisioned to be capable of sensing and reasoning about the operating radio environments and thereby autonomously adjusting their transceiver parameters to exploit the underutilized radio resources in
Hong, Xuemin +4 more
openaire +4 more sources
In this article, we are interested in an important paradigm of secondary systems known as cognitive radio (CR) networks where the secondary terminals are envisioned to be capable of sensing and reasoning about the operating radio environments and thereby autonomously adjusting their transceiver parameters to exploit the underutilized radio resources in
Hong, Xuemin +4 more
openaire +4 more sources
2019
Cognitive radio (CR) offers a novel way for effective usage of wireless spectrum by using dynamic spectrum sensing and allocation. One of the main components of CR is to find a spectrum hole for data transmission. Spectrum hole can be found by using spectrum sensing, a geolocation database, or by using a beacon signal.
Abhijeet Bishnu, Vimal Bhatia
openaire +2 more sources
Cognitive radio (CR) offers a novel way for effective usage of wireless spectrum by using dynamic spectrum sensing and allocation. One of the main components of CR is to find a spectrum hole for data transmission. Spectrum hole can be found by using spectrum sensing, a geolocation database, or by using a beacon signal.
Abhijeet Bishnu, Vimal Bhatia
openaire +2 more sources
Journal of experimental and theoretical artificial intelligence (Print), 2020
Due to exponential growth in demand for radio spectrum for wireless communication networking, the radio spectrum has become over-crowded. The fixed spectrum allocation policy of the radio spectrum leads to inefficient utilisation of the available ...
A. Kaur, Krishan Kumar
semanticscholar +1 more source
Due to exponential growth in demand for radio spectrum for wireless communication networking, the radio spectrum has become over-crowded. The fixed spectrum allocation policy of the radio spectrum leads to inefficient utilisation of the available ...
A. Kaur, Krishan Kumar
semanticscholar +1 more source
Outage Probability for Cooperative NOMA Systems With Imperfect SIC in Cognitive Radio Networks
IEEE Communications Letters, 2019In this letter, a cooperative non-orthogonal multiple access system with imperfect successive interference cancellation is investigated in an underlay cognitive radio network.
Gyeongrae Im, Jae Hong Lee
semanticscholar +1 more source
IEEE Transactions on Vehicular Technology, 2019
Energy efficiency (EE) and spectrum efficiency (SE) have received significant attentions on optimizing the network performance in cognitive radio networks.
Miao Liu +4 more
semanticscholar +1 more source
Energy efficiency (EE) and spectrum efficiency (SE) have received significant attentions on optimizing the network performance in cognitive radio networks.
Miao Liu +4 more
semanticscholar +1 more source