IMPROVEMENT OF BER PERFORMANCE IN MIMO-CDMA SYSTEMS BY USING INITIAL-PHASE OPTIMIZED GOLD CODES

Ibrahim Develi – Meryem Filiz

   This paper describes a new approach to improve the bit error rate (BER) performance of a multiple-input multiple-output code-division multiple-access (MIMO-CDMA) system over quasi-static Rayleigh fading channels. The system considered employs robust space-time successive interference cancellation detectors and initial-phase optimized Gold codes for the improvement. The results clearly indicate that the use of initial-phase optimized Gold codes can significantly improve the BER performance of the system compared to the performance of a multiuser MIMO-CDMA system with conventional non-optimized Gold codes. Furthermore, this performance improvement is achieved without any increase in system complexity.

Keywords: wireless communications, spread spectrum communications, digital communications, multiple access systems, MIMO-CDMA systems, BER performance improvement, initial-phase optimized Gold codes

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