| 摘要 |
PROBLEM TO BE SOLVED: To provide a coordinate calculation system capable of specifying the unknown coordinates of a receiver at lower cost, and more easily. SOLUTION: The receiver 2 receives the radio wave signal containing the coordinate of the radio signal transmitter 1, detects the reception intensity of the radio signal, and also specifies the distance from the radio signal transmitter 1 transmitted the radio signal to own device. The server 3 calculates the coordinates of the receiver 2, after receiving the radio signal from each radio signal transmitter 1 positioning on a plurality of coordinates, by using the coordinate of each position of the transmitter 1, and each distance from the radio transmitter 1 to the each receiver 2. COPYRIGHT: (C)2006,JPO&NCIPI
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