The Research Of Blind Multiuser Detection Algorithm For CDMA Communication

Spread Spectrum communication became one of the communication ways with wide developing prospect, and has being applied to military communication and civil communication extensively. Especially in recently about ten years , because CDMA communication rapidly is developing and the amount of user is increasing in striking speed , the capability of communication give prominence to fall .Because capacity of channel is limited by interference .especially for the interference from the same channels and the adjacent channels. Therefore .multiuser detection technology has became a new hotspot in the research of mobile communication.In this paper, we do far-ranging research on blind multiuser detection algorithm. At first, the basis concept and theory on blind multiuser detection and the existing blind multiuser detection algorithm are introduced, and build the receiving model of multiuser system .By respective joining blind multiuser detection based on Kalman filter with RAKE receiver and array antenna, we respectively build the adaptive blind multiuser detection RAKE receiver based on Kalman filter and blind space-time multiuser detection. Based on the conception of ICA, a blind multiuser detection based on ICA is proposed in this thesis.At last, by constrained minimum kurtosis rule, we build a blind multiuser detection based on higher order cumulants. In this thesis , all algorithms are done with numerical simulations and performance analysis.