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, St Johns, pp. 450-454. ISBN 978-1-4244-3509-8

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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.

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29 Oct 2012 13:11
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21 Nov 2022 14:58