Results 231 to 240 of about 16,885,849 (273)
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Characterizing spectrum goodness for dynamic spectrum access
2012 50th Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2012The combination of exclusive use spectrum licensing and growing demand for voice, data, and video applications is leading to artificial spectrum scarcity. A recent approach to alleviate this artificial spectrum scarcity innovatively uses unused TV spectrum, also called the TV white spaces, through dynamic spectrum access (DSA) techniques.
Aakanksha Chowdhery +3 more
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Dynamic spectrum access and management [Dynamic Spectrum Management
IEEE Wireless Communications, 2010This article addresses a subject that is ripe for application and is approaching necessity for the continued expansive growth in the use of wireless for broadband multimedia communications. If we carry on business as usual in broadcast, public service and paid auctions in assigning spectrum without regard to actual empirical full time use, we will find
Bijan Jabbari +2 more
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Dynamic Spectrum Access in Open Spectrum Wireless Networks
IEEE Journal on Selected Areas in Communications, 2006One of the reasons for the limitation of bandwidth in current generation wireless networks is the spectrum policy of the Federal Communications Commission (FCC). But, with the spectrum policy reform, open spectrum wireless networks, and spectrum agile radios are set to drive next general wireless networks.
Rajarathnam Chandramouli +2 more
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Spatial distributed dynamic spectrum access
2013 IEEE International Conference on Communications (ICC), 2013The spatial aspect of distributed dynamic spectrum access (DSA) in a wireless ad hoc network is usually overlooked in the literature. By using tools from stochastic geometry, we analytically characterized the spatial distribution of users and subsequent interference in the network.
Ching-Yueh Kao +2 more
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A Spectrum Surveying Framework for Dynamic Spectrum Access Networks
IEEE Transactions on Vehicular Technology, 2009Dynamic spectrum access networks and wireless spectrum policy reforms heavily rely on accurate spectrum utilization statistics, which are obtained via spectrum surveys. In this paper, we propose a generic spectrum-surveying framework that introduces both standardization and automation to this process, as well as enables a distributed approach to ...
Alexander M. Wyglinski +2 more
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IEEE Communications Magazine, 2007
Rapid progress is being made in the technology for dynamic spectrum access (DSA) radio systems. However, the structure and dynamics of the wireless services market must also evolve for DSA to succeed. This article examines the interlinked technical and economic issues associated with markets for DSA-based wireless services. We use this analysis to make
William Lehr
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Rapid progress is being made in the technology for dynamic spectrum access (DSA) radio systems. However, the structure and dynamics of the wireless services market must also evolve for DSA to succeed. This article examines the interlinked technical and economic issues associated with markets for DSA-based wireless services. We use this analysis to make
William Lehr
exaly +3 more sources
A Markov Process for Dynamic Spectrum Access
2011 4th IFIP International Conference on New Technologies, Mobility and Security, 2011In order to increase the efficient spectrum usage and to mitigate the current spectrum scarcity, dynamic spectrum access is considered to be an emerging technique. In this paper, based on the concept of dynamic spectrum access, we propose a Markov process that models the two-way interaction process between a primary and a cognitive radio user for ...
Mir, Usama +3 more
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Dynamic spectrum access for small cells
2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2013More flexible spectrum access policies that take advantage of the cognitive radio capabilities of small cells are required to improve the suboptimal spectrum utilization at small cells. However, care must be taken to ensure that interference from autonomously deployed small cells is tightly controlled when developing such policies.
Ahmed Alsohaily, Elvino S. Sousa
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A partial spectrum transmission method for dynamic spectrum access
2009 4th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, 2009This paper proposes a partial spectrum transmission (PST) method for dynamic spectrum access (DSA). For DSA, it is preferable to select modulation scheme which is appropriate for the low-priority user's condition and radio environment by taking into account the required E b /N 0 , frequency efficiency and PARR.
Yasunori Futatsugi +2 more
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Dynamic spectrum access based on interruptible spectrum leasing
Wireless Networks, 2012Dynamic spectrum access (DSA) based on interruptible spectrum leasing allows secondary users (SUs) to lease a licensed, but idle, spectrum that is owned by primary users (PUs) on condition that the PUs preempt the access to the leased spectrum. This paper considers a DSA scenario where the SUs opportunistically use the primary spectrum in addition to ...
Im, SY Im, Soo-Yeol +4 more
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