Subcarrier and Power Allocation for LDS-OFDM System

AL-Imari, M., Imran, M. A. , Tafazolli, R. and Chen, D. (2011) Subcarrier and Power Allocation for LDS-OFDM System. In: 2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), Budapest, Hungary, 15-18 May 2011, ISBN 9781424483310 (doi:10.1109/VETECS.2011.5956554)

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Abstract

Low Density Signature-Orthogonal Frequency Division Multiplexing (LDS-OFDM) has been introduced recently as an efficient multiple access technique. In this paper, we focus on the subcarrier and power allocation scheme for uplink LDS-OFDM system. Since the resource allocation problem is not convex due to the discrete nature of subcarrier allocation, the complexity of finding the optimal solutions is extremely high. We propose a heuristic subcarrier and power allocation algorithm to maximize the weighted sum-rate. The simulation results show that the proposed algorithm can significantly increase the spectral efficiency of the system. Furthermore, it is shown that LDS-OFDM system can achieve an outage probability much less than that for OFDMA system.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: AL-Imari, M., Imran, M. A., Tafazolli, R., and Chen, D.
College/School:College of Science and Engineering > School of Engineering
ISSN:1550-2252
ISBN:9781424483310
Published Online:18 July 2011
Copyright Holders:Copyright © 2011 IEEE
First Published:First published in 2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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