Patent ID: 11968592
Assignee: PAYLESSGATE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 15:
16. A position determination apparatus which determines the position of a personal portable terminal that is to be carried by a person whose position is determined, the position determination apparatus comprising:
a plurality of first position determination side receivers that are arranged at a first position which is spaced at a first distance away from the personal portable terminal to receive a position determination signal that is transmitted by the personal portable terminal through a personal terminal side transmitter to the position determination apparatus to determine the position of the personal portable terminal;
a plurality of second position determination side receivers that are arranged at a second position which is different from the first position and spaced at a second distance greater than the first distance away from the personal portable terminal, and
a position determination side calculator that determines the position of the personal portable terminal based on a difference between an intensity of the position determination signal that is received by the first position determination side receivers and an intensity of the position determination signal that is received by the second position determination side receivers, and
wherein the position determination side calculator evaluates a conditional expression in which whether a difference between the average of radio wave intensities of the position determination signal that are received by the first position determination side receivers and the average of radio wave intensities of the position determination signal that are received by the second position determination side receivers is greater than a predetermined threshold is decided to determine the position of the personal portable terminal.