MOBILE RADIO ANTENNA CONTROL SYSTEM USING GPS

摘要

PROBLEM TO BE SOLVED: To enable a stable communication with small electric power and to suppress interference with a different-area station by sending a radio wave out with an optimum transmission output and an optimum antenna direction. SOLUTION: A mobile station device 1 is connected to a position detecting device 2 and always stores the latest position information. An antenna direction and transmission output controller 6 hold the optimum antenna direction and transmission output at a position in the form of a database from up and down received electric field intensity and data of BER obtained by carrying out a previous radio wave propagation experiment. The mobile station device 1 when performing transmission or reception for communication sends position information to a base station 9 at the same time. The base station 9 calculates which position the mobile station 4 is present at from the position information received by the antenna direction and transmission output controller 6 connected to the base station device 5 and performs transmission with the optimum transmission output at the position by a directional base station transmitting antenna 7 set in the optimum direction.