Results 21 to 30 of about 16,885,849 (273)
COGNITIVE RADIOS FOR DYNAMIC SPECTRUM ACCESS - Polyphase Multipath Radio Circuits for Dynamic Spectrum Access [PDF]
IEEE Communications Magazine, 2007 ABSTRACT Dynamic access of unused spectrum via a cognitive radio asks for flexible radio circuits that can work at an arbitrary radio frequency. This article reviews techniques to realize radios without resorting to frequency selective dedicated filters.
Eric A. M. Klumperink +4 more
openaire +2 more sources
Application-aware dynamic spectrum access [PDF]
Wireless Networks, 2011 Dynamic Spectrum Access (DSA) allows unlicensed wireless devices to opportunistically access unoccupied licensed spectrum bands. DSA yields efficient spectrum utilization which can greatly improve wireless networking performance. In this paper, we advocate application-awareness to effectively manage the side-effects of DSA that can offset its benefits ...
Ashwini Kumar, Kang G. Shin
openaire +1 more source
Suboptimal Approach to Distributed Detection in Cognitive Radio Networks
Journal of Telecommunications and Information Technology, 2021 In this paper a dynamic spectrum access (DSA) concept is explored for mitigating the paucity of spectral bandwidth in cognitive radio (CR) for opportunistic, dynamic access of the spectrum without any interference.
Shweta Kumari, Sirimilla Praveena
doaj +1 more source
Intelligent and Converged Networks, 2020 For a future scenario where everything is connected, cognitive technology can be used for spectrum sensing and access, and emerging coding technologies can be used to address the erasure of packets caused by dynamic spectrum access and realize cognitive ...
Peixiang Cai, Yu Zhang
doaj +1 more source
ENERGY EFFICENT AUCTION BASED DYNAMIC SPECTRUM ACCESS NETWORK
International Islamic University Malaysia Engineering Journal, 2017 A framework is proposed which is aimed at increasing the much needed revenue of the wireless service providers. The model uses the price paid by the wireless users to control the amount of energy consumed and the admission process based on a dynamic ...
Abdulkarim Ayopo Oloyede
doaj +1 more source
The SS-SCR Scheme for Dynamic Spectrum Access
Journal of Computer Networks and Communications, 2012 We integrate the two models of Cognitive Radio (CR), namely, the conventional Sense-and-Scavenge (SS) Model and Symbiotic Cooperative Relaying (SCR). The resultant scheme, called SS-SCR, improves the efficiency of spectrum usage and reliability of the ...
Vinay Thumar +3 more
doaj +1 more source
Discrete Exclusion Zone for Dynamic Spectrum Access Wireless Networks
IEEE Access, 2020 The implementation of a geographic exclusion zone (GEZ) has been a scheme in regulations developed to protect a primary user (PU) in dynamic spectrum access wireless networks, where secondary users (SUs) can transmit only outside the exclusion zone ...
Chen Sun, Ruicheng Jiao
doaj +1 more source
Noncooperative equilibrium solutions for spectrum access in distributed cognitive radio networks [PDF]
, 2008 This paper considers the problem of channel selection and dynamic spectrum access in distributed cognitive radio networks. The ability of a cognitive radio to adaptively switch between channels offers tremendous scope to optimize performance.
Zhong Fan +9 more
core +1 more source
Dynamic spectrum sharing access technology based on blockchain
物联网学报, 2020 The blockchain technology written in the smart contract has advantages of the enabling intelligent settlement,value transfer and resource sharing,which provides a new secure and trusted platform for the dynamic spectrum sharing system.Firstly,the ...
Wei WANG, Zuguang LI, Qihui WU
doaj +2 more sources
Spectrum sharing and cognitive radio [PDF]
, 2009 Spectrum sharing has been the subject of a 3 year research programme organised by the UK's Virtual Centre of Excellence in Mobile and Personal Communications.
A. Yarmohammad +11 more
core +1 more source