Alam, Atm Shafiul; Dooley, Laurence S. and Poulton, Adrian
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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 Item|
|Copyright Holders:||2011 IEEE|
|Keywords:||Cognitive radio, dynamic spectrum access, spectrum sharing, overlay approach, dirty-paper coding (DPC)|
|Academic Unit/Department:||Mathematics, Computing and Technology
Mathematics, Computing and Technology > Computing & Communications
|Interdisciplinary Research Centre:||Centre for Research in Computing (CRC)|
|Depositing User:||Atm Alam|
|Date Deposited:||08 Jul 2011 08:31|
|Last Modified:||24 Feb 2016 11:03|
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