| 摘要 |
PROBLEM TO BE SOLVED: To provide a device and a program for receiving high frequency signals transmitted from a plurality of antennas to be periodically switched at a base station with a mobile terminal and calculating relative phases, and detecting the position of the mobile terminal, or the distance between them, or their mutual direction with high accuracy. SOLUTION: A calculation formula is disclosed which is used for detecting a relative positional relation of the mobile terminal 2 to the base station with high accuracy, by making the intervals between the plurality of directional antennas 11a-11d not wider than one wavelength and transmitting the high frequency signals while periodically switching the antennas at the base station 1, installing the directional antennas 11a-11d so that the directions of their directivities become obliquely downward and have angles, and measuring phase differences between the high frequency signals received by the mobile terminal 2. COPYRIGHT: (C)2009,JPO&INPIT
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