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Downlink performance and complexity evaluation of equalisation strategies for an MC-CDMA ‘4G’ physical layer candidate

Research output: Contribution to conferenceAbstract

Original languageEnglish
Publication dateNov 2003
StatePublished

Abstract

This paper focuses on the performance of equalisation strategies for a downlink MC-CDMA (Multi Carrier-Code Division Multiple Access) based system. MC-CDMA is a leading candidate modulation/multiple access scheme for so called 4th Generation communications. Simulation results utilising Maximum Ratio Combining (MRC), Equal Gain Combining (EGC), Orthogonal Restoring Combining (ORC), and Minimum Mean-Squared Error Combining (MMSEC) for multi-user scenarios are presented. Performance is characterised by bit error rate (BER) for the downlink. A time domain least square channel estimator was implemented along with a frequency based pilot estimation scheme and comparisons made with perfect channel estimation. A complexity analysis of each equalisation scheme is also undertaken. Performance results show that MMSEC provides the best performance for the multi-user scenario as MRC and ultimately EGC both enter error floors as the number of users increase in a wideband channel thereby reducing their usefulness as multi user equalisation schemes

Additional information

Sponsorship: M.A. Cooper would like to thank Toshiba Research Europe Limited (TREL) for their financial and academic support, and in particular the academic support given by Dr. D. McNamara. Thanks are also due to the Engineering and Physical Sciences Research Council (EPSRC) for their financial support Terms of use: Copyright © 2003 IEEE. Reprinted from Proceedings Symposium IEEE Benelux Chapter on Communications and Vehicular Technology, 2003. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it Name of Conference: 10th Symposium on Communications and Vehicular Technology (SCVT) in the Benelux Venue of Conference: Eindhoven, Holland

Research areas

  • 4G, MC-CDMA

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