Patent ID: 8248993

Claim:
A distributed base station serving mobile stations, comprising: a plurality of spatially diverse antenna-RF processing units remote from one another, each of the antenna-RF processing units having an antenna array formed by multiple antennas; and a central processing unit remotely connected with said multiple antenna-RF processing units, each of the antenna RF processing units having an antenna array formed by multiple antennas, said central processing unit comprising: a MIMO coding unit for MIMO coding of data of each of the mobile stations so that data of each of the mobile stations generates multi-path data symbols; a baseband beam-forming unit for multiplying each path data symbol of the multipath data symbols of each of the mobile stations by a weighted coefficient vector corresponding to this path data symbol, to obtain beam-forming data of each path data symbol of each of the mobile stations; and an overlapping unit for, with respect to each antenna in said antenna RF processing units, overlapping beam-forming data of the respective mobile stations for this antenna and feeding the overlapped beam-forming data to this antenna for transmission, wherein the overlapping unit of the baseband beam-forming unit multiplies each path data symbol of each given mobile station by only two weighted coefficient vectors corresponding to two selected antenna-RF processing units selected by the given mobile station to obtain beam-forming data of each path data symbol of each of the mobile stations.