Multiuser space-time interference cancellation system for CDMA mobile communications

An efficient combination of a smart antenna and a multi-stage multiuser interference canceller is proposed for W-CDMA system enhancement. In the proposed advanced receiver, interference cancellation is carried out at the signal level before beamforming by regenerating a spread signal replica of each user signal with the inverse beamforming process. Computer simulation demonstrates that the proposed space-time processing enables one to achieve a joint capacity gain given by the smart antenna and multiuser detection.