Space-Time Blind Multiuser Detection for Multiuser DS-CDMA and Oversampled Systems

Authors:
X. Liu;Z. Z. Xu;L. Lei
Affiliations:
College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China;College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China;College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China
Venue:
Wireless Personal Communications: An International Journal
Year:
2011

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Abstract

Novel space-time blind multiuser detection method for multiuser DS-CDMA and oversampled systems is presented. To achieve signal recovery, Khatri-Rao product structure of the space-time channel matrix of received signals and rank-1 projection strategy are exploited. Two blind signal detection algorithms based on Khatri-Rao product decomposition are proposed. Uniqueness of the Khatri-Rao decomposition is discussed. Simulation results show that the proposed algorithms have performance close to the non-blind Zero Forcing algorithm and still work well in the case of only few antennae in the receiving end.