A successive interference cancellation multiuser detector for MIMO CDMA systems

Multiuser detection in CDMA systems has been well researched since the pioneering work by Verdu that demonstrated the huge potential increase in capacity that multiuser detectors provide over conventional detectors. Some sub-optimal but easily implementable multiuser detectors for single input single output (SISO) systems have been researched. One such detector is the successive interference cancellation (SIC) multiuser detector. In this paper, we propose a simple extension of the SIC multiuser detector to CDMA VBLAST multiple input multiple output (MIMO) systems. We demonstrate the benefits of the SIC multiuser detector over the conventional detector for a few transmit-receive configurations. Further, the effect of thermal noise power on the performance of the SIC multiuser detector has also been shown.