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IEEE Signal Processing Magazine, 2008 Radio regulatory bodies are recognizing that the rigid spectrum assignment granting exclusive use to licensed services is highly inefficient, due to the high variability of the traffic statistics across time, space, and frequency. Recent Federal Communications Commission (FCC) measurements show that, in fact, the spectrum usage is typically ...
Gesualdo Scutari +2 more
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Cooperation and Cognitive Radio [PDF]
2007 IEEE International Conference on Communications, 2007 Cooperation is increasingly regarded as a key technology for tackling the challenges of a practical implementation of cognitive radio. In this paper, we first give a brief overview of the envisioned applications of cooperative technology to cognitive radio, distinguishing among cooperative sensing for detection of the primary activity, cooperative ...
GAMBINI, JONATHAN +3 more
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Rendezvous for Cognitive Radios [PDF]
IEEE Transactions on Mobile Computing, 2011 Cognitive radios have been touted as a solution to communicating in a Dynamic Spectrum Access environment. This paper examines how cognitive radios initially find one another among the expanse of ever-changing open spectrum, termed the rendezvous problem.
Nick C. Theis +2 more
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Cognitive radio realities [PDF]
Wireless Communications and Mobile Computing, 2007 AbstractA cognitive radio (CR) is a transceiver that is aware, adaptive, and capable of learning. It may be visualized and realized as an intelligent software package (cognitive engine) controlling a software defined radio platform. The cognitive engine executes a set of nested loops constituting a cognition cycle, drawing on experience and stored ...
Bin Le +2 more
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Cognitive radio networks [PDF]
IEEE Signal Processing Magazine, 2008 In recent years, the development of intelligent, adaptive wireless devices called cognitive radios, together with the introduction of secondary spectrum licensing, has led to a new paradigm in communications: cognitive networks. Cognitive networks are wireless networks that consist of several types of users: often a primary user (the primary license ...
Natasha Devroye, Mai Vu, Vahid Tarokh
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Robust beamforming in cognitive radio [PDF]
IEEE Transactions on Wireless Communications, 2009 In cognitive radio, it is crucial to control the interference from secondary users (SUs) to primary users (PUs). This paper studies the use of transmit beamforming in the cognitive secondary network for enhancing the performance of a SU while controlling the interference to the PUs.
Wong, KK, Zheng, G, Ng, TS, Ma, S
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On the capacity of partially cognitive radios [PDF]
2009 IEEE International Symposium on Information Theory, 2009 This paper considers the problem of cognitive radios with partial-message information. Here, an interference channel setting is considered where one transmitter (the "cognitive" one) knows the message of the other ("legitimate" user) partially. An outer bound on the capacity region of this channel is found for the "weak" interference case (where the ...
Goochul Chung +3 more
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Trends and Applications for Cognitive Radio [PDF]
Journal of Computer Networks and Communications, 2012 Editorial
Enrico Del Re +2 more
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ACM SIGCOMM Computer Communication Review, 2013 A large volume of research has been conducted in the cognitive radio (CR) area the last decade. However, the deployment of a commercial CR network is yet to emerge. A large portion of the existing literature does not build on real world scenarios, hence, neglecting various important aspects of commercial telecommunication networks.
Konstantinos Pelechrinis +3 more
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2020 2nd Al-Noor International Conference for Science and Technology (NICST), 2020 Day by day, there is increasing demand for high data rates it causes lack of radio spectrum for the new emerging technologies in the area of wireless communications. So, it is, must use spectrum efficiently, i.e. proper spectrum management. Spectrum management is responsible for the spectrum deficiency.
Rajeshree Raut +2 more
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