For coded-division multiple access (CDMA) mobile communication receiving systems

a new space-time 2-dimension signal processing framework is presented in this paper

which is a kind of parallel interconnection of smart antenna and RAKE receiver (PI-SARR).Based on this framework the space-time 2-dimension adaptive digital-beamforming (ST2-DADBF) algorithm is given.Comparing with the 2-dimension RAKE receiver (2-DRR)

the ST2-DADBF algorithm can implement optimal outputs of joint space- and time-domain without estimating delay-DOA's (Directions of Arrival).Comparing with the pilot symbol-assisted coherent adaptive antenna array diversity receiver (PSA-CAAADR)

the ST2-DADBF algorithm is a genuine 2-dimension adaptive algorithm

which can combine smart antenna and RAKE receiver to perform adaptive algorithm without estimating parameters of RAKE fingers.Considering both effects of time-delay-dispersion and space-angle-dispersion of the channel

we present a general signal model for multiple-subscriber mobile communication system.Based on this model the computational simulations of the ST2-DADBF algorithm are done.Simulating results imply that the ST2-DADBF algorithm can catch each of the multi-path components of the interested user in 2-D space-time domain

and combine these components coherently and simultaneously

while suppress interferences caused by other users in time- and space-domain

hence improve bit error rate (BER) performance of the system.