Title:
POSITION DETECTING SYSTEM AND POSITION DETECTING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/204087
Kind Code:
A1
Abstract:
A position detecting system (1) is provided with a mobile station (2), a reference station (3), fixed stations (4) to (6), and a server (7). The mobile station (2) transmits a first radio signal S1, and the reference station (3) transmits a second radio signal S2 a plurality of times. The fixed stations (4) to (6) extract a first phase difference based on the first radio signal S1, and extract a second phase difference based on the second radio signal S2. On the basis of a plurality of the second phase differences, the server (7) calculates a third phase difference by obtaining the time variation of the second phase differences. The server (7) cancels phase offsets of the fixed stations (4) to (6) using phase difference information between the mobile station (2) and the fixed stations (4) to (6) and phase difference information between the reference station (3) and the fixed stations (4) to (6), obtains distance information between the fixed stations (4) to (6) and the mobile station (2), and calculates the position of the mobile station (2).
Inventors:
TAKIZAWA KOICHI (JP)
Application Number:
PCT/JP2017/018731
Publication Date:
November 30, 2017
Filing Date:
May 18, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G01S5/06; H04L7/00
Foreign References:
| JP2005140617A | 2005-06-02 | |||
| JP2009133649A | 2009-06-18 | |||
| JP2007510909A | 2007-04-26 | |||
| US20140266609A1 | 2014-09-18 |
Attorney, Agent or Firm:
HIROWA PATENT FIRM (JP)
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