Performance Analysis of Multiuser Detectors for Uplink Quasi-synchronous MC-CDMA Systems

Authors:
Felip Riera-Palou;Guillem Femenias;Jaume Ramis
Affiliations:
Department of Mathematics and Informatics, University of the Balearic Islands (UIB), Palma de Mallorca, Spain 07122;Department of Mathematics and Informatics, University of the Balearic Islands (UIB), Palma de Mallorca, Spain 07122;Department of Mathematics and Informatics, University of the Balearic Islands (UIB), Palma de Mallorca, Spain 07122
Venue:
Wireless Personal Communications: An International Journal
Year:
2007

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Error Rate Analysis of Uplink MC-CDMA Systems under Imperfect Channel Estimation

Wireless Personal Communications: An International Journal

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Abstract

This paper analyses and compares the average bit error rate (BER) of different multiuser detectors (MUD) in the uplink of a multicarrier code- division multiple access (MC-CDMA) system. In particular, maximum likelihood, zero-forcing, minimum mean-square error and interference cancellation-based multiuser detectors have been analysed for the special case of uncorrelated subcarriers. The derived BER expressions are based upon previous results on diversity combining and also on recent findings on multiple input multiple output (MIMO) architectures. The subcarrier correlation is considered in the context of physical parameters currently under discussion for future wireless systems to give an indication up to what extent the assumption of uncorrelated subcarrier fading is plausible.