A Novel Blind Space-Time Multiuser Detector for DS-CDMA Communication System

In this paper, a novel blind space-time multiuser detector, called Space-Time Constrained Minimum Output Energy (ST-CMOE) detector, is proposed. The proposed ST-CMOE detector processes the received snapshot vector jointly in spatial and temporal domain and it can achieve the same performance as the training based space-time minimum mean square error (ST-MMSE) detector. An adaptive version of the proposed ST-CMOE detector is also presented. The computational load of this adaptive detector is comparable to Hu's method [1], while it does not require any initial training or channel estimation in the multipath environment. Simulation shows that, the adaptive ST-CMOE detector can work well in a dynamic multiple-access channel.