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Dynamic spectrum access based on cognitive radio within cellular networks

Alam, Atm Shafiul; Dooley, Laurence S. and Poulton, Adrian (2011). Dynamic spectrum access based on cognitive radio within cellular networks. In: 7th IEEE International Conference on Wireless Advanced, 20-22 Jun 2011, London.

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Overlay transmissions in cognitive radio (CR) permit a secondary system to use spectrum concomitantly with a primary system, though adopting this spectrum sharing strategy presents a number of challenges, such as the requirement for a secondary user to have a priori knowledge as side information about the primary user. In this paper, a cognitive cellular network is proposed which uses an overlay approach to dynamically share its radio resource by incorporating cognition, leading to enhanced cell capacity. To compensate for the interference caused by the overlay, cognitive base stations use robust dirty-paper coding in combination with variable transmission powers, which are set depending upon the location of the mobile stations. A detailed performance analysis is presented to corroborate the improved spectrum utilization achieved using this technique.

Item Type: Conference or Workshop Item
Copyright Holders: 2011 IEEE
Keywords: Cognitive radio, dynamic spectrum access, spectrum sharing, overlay approach, dirty-paper coding (DPC)
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM)
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Computing and Communications
Research Group: Centre for Research in Computing (CRC)
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Item ID: 29028
Depositing User: Atm Alam
Date Deposited: 08 Jul 2011 08:31
Last Modified: 10 Dec 2018 20:50
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