Low complexity subcarrier and power allocation algorithm for uplink OFDMA systems

Al-Imari, M., Xiao, P., Imran, M. A. and Tafazolli, R. (2013) Low complexity subcarrier and power allocation algorithm for uplink OFDMA systems. EURASIP Journal on Wireless Communications and Networking, 2013, 98. (doi:10.1186/1687-1499-2013-98)

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Abstract

In this article, we consider the joint subcarrier and power allocation problem for uplink orthogonal frequency division multiple access system with the objective of weighted sum-rate maximization. Since the resource allocation problem is not convex due to the discrete nature of subcarrier allocation, the complexity of finding the optimal solution is extremely high. We use the optimality conditions for this problem to propose a suboptimal allocation algorithm. A simplified implementation of the proposed algorithm has been provided, which significantly reduced the algorithm complexity. Numerical results show that the presented algorithm outperforms the existing algorithms and achieves performance very close to the optimal solution.

Item Type:Articles
Additional Information:This study was sponsored by the UK Engineering and Physical Sciences Research Council (EPSRC) under grant number EP/J017655/1. The authors would like to acknowledge its financial support.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Al-Imari, M., Xiao, P., Imran, M. A., and Tafazolli, R.
College/School:College of Science and Engineering > School of Engineering
Journal Name:EURASIP Journal on Wireless Communications and Networking
Publisher:Springer
ISSN:1687-1472
ISSN (Online):1687-1499
Copyright Holders:Copyright © 2013 Al-Imari et al.
First Published:First published in EURASIP Journal on Wireless Communications and Networking 2013: 98
Publisher Policy:Reproduced under a Creative Commons License

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