Open Access

Subcarrier Group Assignment for MC-CDMA Wireless Networks

EURASIP Journal on Wireless Communications and Networking20072007:037091

DOI: 10.1155/2007/37091

Received: 19 January 2007

Accepted: 20 November 2007

Published: 26 December 2007

Abstract

Two interference-based subcarrier group assignment strategies in dynamic resource allocation are proposed for MC-CDMA wireless systems to achieve high throughput in a multicell environment. Least interfered group assignment (LIGA) selects for each session the subcarrier group on which the user receives the minimum interference, while best channel ratio group assignment (BCRGA) chooses the subcarrier group with the largest channel response-to-interference ratio. Both analytical framework and simulation model are developed for evaluation of throughput distribution of the proposed schemes. An iterative approach is devised to handle the complex interdependency between multicell interference profiles in the throughput analysis. Illustrative results show significant throughput improvement offered by the interference-based assignment schemes for MC-CDMA multicell wireless systems. In particular, under low loading conditions, LIGA renders the best performance. However, as the load increases BCRGA tends to offer superior performance.

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Authors’ Affiliations

(1)
Faculty of Information Engineering and Technology, German University in Cairo (GUC)
(2)
Department of ECE, McGill University

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Copyright

© T. El Shabrawy and T. Le-Ngoc. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.