Multiple access interference(MAI) is a key problem in DS-CDMA.Both multiuser detection method and array antenna have been introduced to reduce the effect of MAI respectively.Many proposed multiuser detectors require system parameters and their adaptive versions require training sequences.These parameters are difficult to obtain in multipath fading channels.In this paper

a novel blind space-time multiuser detector based on the Kalman filter is proposed.With numerical simulations and performance analysis

it is shown that the detector precedes the conventional space-time 2-dimensional RAKE receiver and the space-time multiuser detector based on LMS in eliminating MAI and near-far resistance.Furthermore

it can converge rapidly.