Patent ID: 7130662

Claim:
A method for reducing inter-cell interference between WTRUs and multi-user detection (MUD)-enabled base stations comprising: storing at each base station, a set of channel impulse response data for each of a plurality of WTRUs; selecting at least two planar points in a cell as locations of interference for each of said plurality of WTRUs; determining a set of complex antenna weights from said set of channel impulse response data and said planar points for each WTRU which maximizes a signal at each of said plurality of WTRUs while nulling said signal at all other WTRUs; such that the antenna weights are represented as {w i,j }, where i is the index of designed user and j is the index of the antenna, channel impulse response R i calculated as R i =H i H H i , where H i =[h 1i h 2i h 3i ], and h ij is a channel impulse response from antenna i to user j, the antenna weights calculated as max w i ⁢ w i H ⁢ R i ⁢ w i w i H ⁢ R _ i ⁢ w i subject to |w i |=1 for i =1,2, . . . N, and R _ i = ∑ k ≠ i ⁢ R k ; and applying said antenna weights to create partitioning of said cell, where each WRTU's signal is emphasized in its own area and deemphasized in other areas.