Patent ID: 7149548

Claim:
An antenna apparatus installed in a base station in a code division multiple access communication system, the apparatus comprising: a plurality of antenna elements, each configured to receive at least one radio signal; a controller configured to produce an antenna control signal based on at least a path delay time and an arrival direction, both the path delay time and the arrival direction are extracted from the at least one radio signal received at each of the antenna elements; an adjusting unit configured to adjust a directivity characteristic of each of the antenna elements based on the antenna control signal; and an allocating unit configured to allocate each of the antenna elements to one of sectors based on the antenna control signal, the sector covering a portion of a cell controlled by the base station, and the number of sectors in the cell being variable by means of the antenna control signal, the allocating unit being configured to control the number of sectors based on a combination of cell sectoring and adaptive array control.