Results 221 to 230 of about 215,250 (265)
A Scheme for Covert Communication with a Reconfigurable Intelligent Surface in Cognitive Radio Networks. [PDF]
Sensors (Basel)Xu Y, Qian J, Zhu P.
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Accurate Localization Method Combining Optimized Hybrid Neural Networks for Geomagnetic Localization with Multi-Feature Dead Reckoning. [PDF]
Sensors (Basel)Yan S +5 more
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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
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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
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
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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
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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
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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
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2017
A cognitive radio can be defined by the capability of being aware of its environment and the internal state and, based on the knowledge of these elements and any stored pre-defined objectives, can dynamically adapt, make, and implement decisions about its behavior.
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A cognitive radio can be defined by the capability of being aware of its environment and the internal state and, based on the knowledge of these elements and any stored pre-defined objectives, can dynamically adapt, make, and implement decisions about its behavior.
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Cognitive radio network architecture
Proceedings of the 2nd international conference on Ubiquitous information management and communication, 2008Cognitive radio has been considered as a key technology for future wireless communications and mobile computing. We note the cognitive radios can form cognitive radio networks (CRN) by extending the radio link features to network layer functions and above.
K.-C. Chen +4 more
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Cognitive radio network management
IEEE Vehicular Technology Magazine, 2008The regulatory agencies have been pushed by the increasing demand for wireless ubiquitous connectivity to be ever more aggressive in providing innovative ways to use spectra efficiently. Driven by these new opportunities, the future radio systems should look for the optimized architecture, circuit, and algorithm as a whole. In this article, it has been
null Cheng-xiang Wang +3 more
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Cognitive Radio Sensor Networks
2014This chapter provides a review of design practices in network communication for Cognitive Radio Sensor Networks. The basics of networking and Medium Access Control functionalities with focus on data routing and spectrum usage are discussed. Technical differences manifest in various network layouts, hence the role of various specialized nodes, such as ...
Yasir Saleem, Mubashir Husain Rehmani
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Cognitive Radio Network Tomography
IEEE Transactions on Vehicular Technology, 2010The cognitive radio network (CRN), as a promising technique in future wireless communication networks, shall execute some critical functionalities to enhance existing wireless networks, such as network reconfigurability to adaptively select networks (e.g., in IEEE P1900.4 and ETSI-RSS), spectrum opportunity utilization for transmissions over ...
null Chung-Kai Yu +2 more
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