Space-Time Equalisation Assisted Minimum Bit-Error Ratio Multiuser Detection for SDMA Systems

Chen, S., Yang, X.C. and Hanzo, L. (2005) Space-Time Equalisation Assisted Minimum Bit-Error Ratio Multiuser Detection for SDMA Systems. 2005 IEEE 61st Vehicular Technology Conference, Clarion Hotel, Stockholm, Sweden. 30 May - 01 Jun 2005. pp. 1220-1224 .

Record type: Conference or Workshop Item (Paper)

Abstract

This contribution investigates a space-time equalisation assisted multiuser detection scheme designed for multiple receiver antenna aided space division multiple access (SDMA) systems. A novel minimum bit error ratio (MBER) design is invoked for the multiuser detector (MUD), which is shown to be capable of improving the attainable performance and enhancing system capacity in comparison to that of the standard minimum mean square error (MMSE) design. The adaptive MUD coefficient adjustment procedure of the MBER space-time MUD is implemented using a stochastic gradient based least bit error rate (LBER) algorithm, which consistently outperforms the classic least mean square (LMS) algorithm, while maintaining a lower computational complexity than the latter.

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