POSITION JUDGEMENT DEVICE FOR MOBILE OBJECT

摘要

PURPOSE:To provide a system which can be used in any places including indoor places, with which a user does not need to strictly consider the posture of an antenna and which can be loaded on the other radio communication terminal such as a digital portable telephone. CONSTITUTION:In the system consisting of plural radio base stations 10-1M provided with radio communication equipments and directional antennas radiating a radio wave with directivity and of a mobile station 20 provided with a radio communication equipment and a non-directional antenna, the radio base stations 10-1M sequentially transmit burst signals including base station identification information and directional information to the other radio base stations so as not to interfer them while they change directivity. The mobile station 20 successively reception-processes the burst signals, and judges the position of the mobile station 20 based on base station identification information, directional information and received field intensity information on the burst signal.