Patent ID: 7218684

Claim:
A null beam technique wherein only one of at least two remote users, all of whom employ a same or a correlated spreading code within a given cell or sector, is enabled to receive a communication from a base station transmitting to the at least two remote users, said base station transmitting to said remote users over an antenna array having a plurality of antennas, comprising: a) said base station modulating data d i , for i=1, . . . , N, intended for one of N (N>1) remote users with N+1 complex weights w i (for i=1, . . . , N, each is a N+1 complex vector), each modulated signal being directed to one of said N+1 antennas; wherein each element of the vectors w 1 and w 2 is a function of the channel impulse responses from the antenna array to locations of the remote users; b) summing the modulated data signals d 1 , d 2 , . . . d N and c) transmitting the summed signals.