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Adaptive subcarrier allocation in multiuser OFDM system using forced cost based decisions

Munasinghe, Gayan, Jayalath, Dhammika, & Ziri-Castro, Karla I. (2012) Adaptive subcarrier allocation in multiuser OFDM system using forced cost based decisions. In Proceedings of the IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications, IEEE Explore, Sydney, N. S.W., pp. 1336-1341.

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Abstract

Subcarrier allocation scheme for Orthogonal Frequency Division Multiplexing(OFDM) based multiuser system is proposed. Most previous algorithms use greedy approach as a subcarrier allocation scheme until a conflict occurs or as an initial first round allocation with improvement steps carried out in next rounds. Our algorithm uses information obtained by the forced costs of a system that incur by a current allocation to make assignment decisions. This algorithm does not rely on greedy approach and therefore can also be considered as a substitute for first layer Greedy algorithms. Simulation results show that for two user case this algorithm gives better or equal allocation 80-90 percent of the time when compared with the greedy allocation.

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ID Code: 53783
Item Type: Conference Paper
Keywords: Orthogonal Frequency Division Multiplexing, Subcarrier Allocation, Forced Cost
DOI: 10.1109/PIMRC.2012.6362554
ISBN: 978-1-4673-2566-0
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 IEEE
Deposited On: 24 Sep 2012 09:05
Last Modified: 19 Feb 2013 19:11

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