DIVERSITY ANTENNA CHANGEOVER DEVICE AND METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a diversity antenna changeover device that utilizes an existing device able to select only two antennas and can easily select an optimum antenna among three or more antennas. SOLUTION: The diversity antenna changeover device is provided with a changeover device 2 that receives signals of two antennas included in a set selected from three or more antennas and provides the output of a 1st signal (DATADET) denoting a reception state and a 2nd signal (ANTSEL) denoting an antenna used for the reception, a discrimination circuit 11 that monitors whether or not the state is the reception state on the basis of the 1st signal from the changeover device and discriminates the antennas used in the set of the antennas on the basis of the 2nd signal when the result of monitoring indicates the reception state, a setting circuit 12 that sets again a set of the antennas on the basis of an output of the discrimination circuit, and a changeover circuit 13 that selects the two antennas included in the set of the antennas set by the setting circuit and supplies the output to the changeover device.