Patent ID: 8553746

Claim:
A base station employing null beam steering of wireless communication signals to a plurality of users, comprising: an antenna array having a plurality of antennas; a spreading code generator for selecting spreading codes for the plurality of users that correlate to spreading codes already being used with the same cell; a plurality of weight modulators for modulating data d i , for i=1, . . . , N, intended for one of N users with N+1 complex weights w i , for i=1, . . . , N+1, each modulated signal being directed to one of the N+1 antennas; wherein the complex weights are selected to create a null at one of the plurality of users, such that a gain of a composite channel from the base station to the nulled user is zero and a gain of a composite channel from the base station to another user is maximized; wherein each element of the complex weights is a function of the channel impulse responses from the antenna array to locations of the users; and a summer for summing the weight modulated data signals.