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A dynamic spectrum access scheme for cognitive radio networks

Du, K. -L. and Swamy, M. N. S. and Ni, Qiang (2009) A dynamic spectrum access scheme for cognitive radio networks. In: Electrical and Computer Engineering, 2009. CCECE '09. Canadian Conference on. IEEE, NEW yORK, pp. 450-454. ISBN 978-1-4244-3509-8

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Abstract

In this paper, the dynamic spectrum access problem for cognitive radio (CR) networks is formulated as maximizing the sum channel capacity while satisfying the power budgets of individual secondary user radios as well as the SINR constraints on both the secondary and primary users. By applying the Karush-Kuhn-Tucker theorem, we derive a water-filling soluton. An iterative water-filling algorithm is proposed for implementing joint channel and power allocation in a dynamically changing set of available channels. The proposed algorithm has a complexity that increases linearly with both the number of channels and the number of users.

Item Type: Contribution in Book/Report/Proceedings
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 59636
Deposited By: ep_importer_pure
Deposited On: 29 Oct 2012 13:11
Refereed?: No
Published?: Published
Last Modified: 10 Apr 2014 01:44
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59636

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