Adaptive antenna control method and adaptive antenna transmission/reception characteristic control method

An adaptive antenna transmission/reception characteristic control method characterized in that

• when a plurality of terminal stations are present in a radio zone where a plurality of radio base stations each having an antenna are present, and at least two of the plurality of terminal stations are transmitting/receiving radio wave signals to/from different radio base stations using the same communication channel with the same signal transmission/reception frequency and same signal transmission/reception timing, a transfer function obtained from at least one of i) a transmission signal from each terminal station and ii) a reception signal at each terminal station, which is received by and transmitted from each of the terminal stations, is received through the plurality of radio base stations that each communicates with each of the terminal stations, and a weight vector of which a square error between the reception, signal and a desired signal corresponding thereto smaller than a predetermined threshold is selected on the basis of the received transfer function to thereby change a directivity characteristic of the antenna of each base station so as to reduce an interference power between the terminal stations.