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

MA Cooper, SMD Armour, JP McGeehan

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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.
Translated title of the contributionDownlink performance and complexity evaluation of equalisation strategies for an MC-CDMA ‘4G’ physical layer candidate
Original languageEnglish
Title of host publicationSymposium on Communications and Vehicular Technology (SCVT) in the Benelux
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Publication statusPublished - Nov 2003

Bibliographical note

Conference Proceedings/Title of Journal: IEEE 10th Symposium on Communications and Vehicular Technology in the Benelux, 2003

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