Results 141 to 150 of about 15,831,729 (172)
Some of the next articles are maybe not open access.
2015
Introduction The previous chapter touched on the concept that devices could share spectrum on a “dynamic” basis. So, for example, if a primary user was not using spectrum in a given location at a particular time then a secondary user might opportunistically make use of it.
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Introduction The previous chapter touched on the concept that devices could share spectrum on a “dynamic” basis. So, for example, if a primary user was not using spectrum in a given location at a particular time then a secondary user might opportunistically make use of it.
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Spectrum Sensing for Dynamic Spectrum Access of TV Bands
2007 2nd International Conference on Cognitive Radio Oriented Wireless Networks and Communications, 2007In this paper we address the issue of spectrum sensing in cognitive radio based wireless networks. Spectrum sensing is the key enabler for dynamic spectrum access as it can allow secondary networks to reuse spectrum without causing harmful interference to primary users. Here we propose a set of integrated medium access control (MAC) and physical layer (
Carlos Cordeiro 0001 +3 more
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Hybrid spectrum sharing in dynamic spectrum access networks
The International Conference on Information Networking 2013 (ICOIN), 2013In this work, inefficient spectrum usage problem which will lead to spectrum scarcity in future communications has been addressed. According to Federal Communications Commission, spectrum sharing is a technique to efficiently utilize the spectrum. We analyse dynamic spectrum access concepts such as overlay spectrum sharing and underlay spectrum sharing.
Nair, Sabari Somasekharan +3 more
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Massive MIMO for dynamic spectrum access
2017 IEEE International Conference on Consumer Electronics (ICCE), 2017This paper proposes the application of massive MIMO, combined with millimeter (mm)-wave technology, in dynamic spectrum access (DSA) systems. In the proposed system, secondary users transmit together with the primary users, while using beamforming to control interference. Simulation results show significant performance gains compared to traditional DSA
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Policy-based spectrum access control for dynamic spectrum access network radios
Journal of Web Semantics, 2009We describe the design of a policy-based spectrum access control system for the Defense Advanced Research Projects Agency (DARPA) NeXt Generation (XG) communications program to overcome harmful interference caused by a malfunctioning device or a malicious user.
Filip Perich, Mark McHenry
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Blockchain-Enabled Dynamic Spectrum Access: Cooperative Spectrum Sensing, Access and Mining
2019 IEEE Global Communications Conference (GLOBECOM), 2019Traditionally, dynamic spectrum access (DSA) based on cooperative spectrum sensing relies on a centralized fusion centre to fuse and store the sensing results, which is vulnerable to single point of failure. In this paper, we propose a sensing-based DSA framework which is enabled by blockchain.
Yiyang Pei +4 more
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2015 13th International Conference on Telecommunications (ConTEL), 2015
Recently, Dynamic Spectrum Access (DSA) and Cognitive Radio (CR) have received increasing interest from the research community, raising high expectations related to spectrum sharing between mobile operators or exploiting white spaces (e.g. fixed wireless access in rural areas through the usage of locally unused TV spectrum).
Wirsing, Stephan, Reichl, Peter
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Recently, Dynamic Spectrum Access (DSA) and Cognitive Radio (CR) have received increasing interest from the research community, raising high expectations related to spectrum sharing between mobile operators or exploiting white spaces (e.g. fixed wireless access in rural areas through the usage of locally unused TV spectrum).
Wirsing, Stephan, Reichl, Peter
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2015
We present another spectrum sharing architecture called dynamic spectrum co-access (DSCA), to enable secondary users to simultaneously access spectrum with primary users, to create a win-win situation for both. In this architecture, the secondary user uses a portion of its transmit power to provide incentives to primary users. Different from the IC-DSA
ChunSheng Xin, Min Song
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We present another spectrum sharing architecture called dynamic spectrum co-access (DSCA), to enable secondary users to simultaneously access spectrum with primary users, to create a win-win situation for both. In this architecture, the secondary user uses a portion of its transmit power to provide incentives to primary users. Different from the IC-DSA
ChunSheng Xin, Min Song
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Reinforcement learning based dynamic spectrum access in cognitive Internet of Vehicles
China Communications, 2021Yuto Lim, Can Sun, Mu Zhou
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Dynamic Spectrum Access for Internet-of-Things Based on Federated Deep Reinforcement Learning
IEEE Transactions on Vehicular Technology, 2022Kwok-Yan Lam, Guiyi Wei
exaly