Title:
MOVING BODY POSITION MEASUREMENT SYSTEM, CENTRAL STATION, QUERY CONTROL METHOD FOR SAME, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2017/208277
Kind Code:
A1
Abstract:
To expand the coverage within which the position of a moving body can be measured with a high degree of accuracy, this moving body position measurement system is provided with three or more reception units 11 that are disposed so as to be apart from each other and receive a response signal transmitted from the moving body 2, a transmission unit 21 that is provided to one of the reception units 11 and transmits a query signal, a positioning calculation unit 31 that calculates the distance from the moving body 2 to the one reception unit 11 on the basis of the transmission time of the transmission unit 21 when the one reception unit 11 received a response signal corresponding to the query signal transmitted by the transmission unit 21 and the reception time of the reception by the one reception unit 11 and calculates the position of the moving body 2 on the basis of the calculated distance and the reception times when the reception units 11 received the response signal from the moving body 2, and a query control unit 32 that controls the transmission of the query signal, and if three reception stations 11 receive a response signal including altitude information, the positioning calculation unit 31 calculates an estimated position for the moving body 2 on the basis of the reception times when the response signal from the moving body 2 was received and the altitude information, and the query control unit 32 causes the transmission unit 21 to transmit the query signal to the estimated position.
Inventors:
KANEDA TOMOTAKA (JP)
Application Number:
PCT/JP2016/002619
Publication Date:
December 07, 2017
Filing Date:
May 31, 2016
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01S13/91; G01S5/06; G01S5/12; G01S13/76
Other References:
TADASHI KOGA: "Mitigation of Radio Signal Congestion by the Passive Acquisition Technique for Secondary Surveillance Radar Mode S", IEICE TECHNICAL REPORT, vol. 114, no. 397, 15 January 2015 (2015-01-15), pages 101 - 105
HIROKI SHIMADA ET AL.: "Evaluation Result of a Positioning Method for Wide Area Multilateration Using Measured Distance", IEICE TECHNICAL REPORT, vol. 113, no. 387, 16 January 2014 (2014-01-16), pages 61 - 66
HIROKI SHIMADA ET AL.: "Evaluation Result of a Positioning Method for Wide Area Multilateration Using Measured Distance", IEICE TECHNICAL REPORT, vol. 113, no. 387, 16 January 2014 (2014-01-16), pages 61 - 66
Attorney, Agent or Firm:
SHIMOSAKA, Naoki (JP)
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