Results 241 to 250 of about 2,658,834 (309)

Intelligent Reflecting Surface Aided MIMO Cognitive Radio Systems

IEEE Transactions on Vehicular Technology, 2020
In cognitive radio (CR) systems, the spectrum efficiency (SE) of the secondary users (SUs) is always limited by the interference temperature constraint imposed on the primary users (PUs). Intelligent reflecting surface (IRS) has been recently proposed as
Lei Zhang, Yu Wang, Weige Tao, Z. Jia, Tiecheng Song, Cunhua Pan   +5 more
semanticscholar   +1 more source

Cognitive engine design for cognitive radio

2012 International Conference on Multimedia Computing and Systems, 2012
The work presented in this paper consists of designing a cognitive engine for a cognitive radio receiver. This engine must provide to the radio receiver the ability to be aware of its environment and to make decisions about actions of reconfiguration; these actions aim to adapt the receiver architecture to the state of the environment. In our design we
Salma Bourbia, Madiha Achouri, Khaled Grati, Daniel Le Guennec, Adel Ghazel   +4 more
openaire   +2 more sources

Security and channel noise management in cognitive radio networks

Computers & electrical engineering, 2020
The Spectrum Channel Noise is a pseudorandom or random computational process in a manner that allows the security competence of the available spectrum management frameworks for cognitive radio networks. To mitigate the cognitive spectrum and its security
A. Haldorai, A. Ramu
semanticscholar   +1 more source

Cognitive radio networks

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
Xuemin Hong, Zengmao Chen, Cheng-Xiang Wang 0001, Sergiy A. Vorobyov, John S. Thompson   +4 more
openaire   +2 more sources

Visual Cognitive Radio

Concurrency and Computation: Practice and Experience, 2011
SUMMARYCognitive radio is always based on spectrum sensing to cognize the physical characteristics of the wireless channel and carry out wireless communication resource scheduling. This kind of method makes it hard for cognitive radio to respond to a change in the radio environment in advance.
Tian Liu, Shihai Shao, Daixiong Ye, Youxi Tang, Juan Zhou   +4 more
openaire   +1 more source

A Software Defined Radio Cross-Layer Resource Allocation Approach for Cognitive Radio Networks: From Theory to Practice

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, Konstantinos Tsitseklis, V. Karyotis, S. Papavassiliou   +3 more
semanticscholar   +1 more source

Railway Cognitive Radio

IEEE Vehicular Technology Magazine, 2010
Wireless communication plays a vital role in the success of railroad operations. This article describes an effort toward developing a railroad-specific cognitive radio (rail-CR) that can meet the needs of future wireless communication systems for railways by making positive train control (PTC) communication more interoperable, robust, reliable ...
Ashwin E. Amanna, Manik Gadnhiok, Matthew J. Price, Jeffrey H. Reed, W. Pam Siriwongpairat, T. Kee Himsoon   +5 more
openaire   +1 more source

The cognitive in cognitive radio

Proceedings of the 1st ACM workshop on Cognitive radio architectures for broadband, 2013
In this keynote address, the globally recognized inventor of cognitive radio will discuss the foundations of cognitive radio and its evolution into self-aware nodes and self-organizing wireless networks that accelerate the evolution of affordable broadband wireless communications products and systems.
openaire   +1 more source

Semantics in Cognitive Radio

2009 IEEE International Conference on Semantic Computing, 2009
This paper characterizes key semantics issues in shaping cognitive radio behavior to realize social contracts and business logic via cognitive radio behavioral semantics, with an immediate need for IEEE P1900.5 policy languages. The paper shows the current lack of consensus on the scope and needs of policy languages, tracing roots to differences among ...
Joseph Mitola III, Hong Man
openaire   +1 more source

Cognitive Radio Prototyping

2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008), 2008
Future wireless systems have been evolving toward a broadband and open architecture for efficient multi-service operation, which will have a great impact on the terminal and infrastructure component design methodology for supporting multiple radio schemes.
Peter Jung 0002, Alexander Vießmann, Christoph Spiegel 0001, Admir Burnic, Zijian Bai, Guido Horst Bruck, Konstantin Statnikov, Andreas Waadt, Shangbo Wang, Xavier Popon, Rafael Rodriguez Velilla, Harri Saarnisaari, Matthias Alles, Torben Brack, Frank Kienle, Friedbert Berens, Salvatore Rotolo, Fabio Mario Scalise, Norbert Wehn   +18 more
openaire   +1 more source