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Title: A dynamic spectrum access scheme for cognitive radio networks
Authors: Du, KL
Swamy, MNS
Ni, Q
Publication Date: 2009
Publisher: IEEE
Citation: CCECE '09. Canadian Conference on Electrical and Computer Engineering. St. John's, NL, 3-6 May 2009. pp. 450 - 454.
Abstract: 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 waterfilling 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.
Appears in Collections:School of Engineering and Design Research papers
Electronic and Computer Engineering

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