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Kalman-Based Blind Multiuser Detection with Multiple Receiver Antennas for the Uplink of Asynchronous DS-CDMA Systems

By F P Wathan, R Hoshyar and R Tafazolli

Abstract

A batch Kalman-based blind adaptive multiuser detection\ud (K-BA-MUD) with multiple receiver (Rx) antennas is investigatedfor asynchronous CDMA systems in the Uplink\ud direction. In this paper, we consider two receiver structures:the Independent and the Cooperative structure. Previousresults had stated that the Cooperative structure always outperforms the Independent one. However, with a\ud limited number of samples available for signal detection,\ud we need to justify how cooperative the processing should\ud be to maintain that statement. Toward this end we propose\ud the Partially Cooperative structure that relaxes the Identifiability Condition (IC) of a single Rx antenna K-BA-MUD. It is concluded that the proposed structure will outperform the Fully Cooperative one in any condition, given the number of samples is small and the IC is not violated. Finally, by reducing the size of the steering vector, we also reduce its computational complexity for updating the detector parameters

Publisher: Institute of Electrical and Electronics Engineers
Year: 2005
DOI identifier: 10.1109/VETECS.2005.1543456
OAI identifier: oai:epubs.surrey.ac.uk:2407

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