The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 2019
Filed:
Nov. 12, 2018
Murata Manufacturing Co., Ltd., Kyoto, JP;
Koichi Takizawa, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A position detection system includes a mobile station, a reference station, fixed stations to, and a server. The mobile station transmits a first radio signal Sand the reference station transmits a second radio signal Smultiple times. Each of the fixed stations extracts a first phase difference based on the first radio signal Sand extracts second phase differences based on the second radio signals S. The server calculates time variations of the second phase differences based on the multiple second phase differences to calculate a third phase difference. The server cancels phase offset by the respective fixed stations using phase difference information between the mobile station and the respective fixed stations and phase difference information between the reference station and the respective fixed stations and acquires distance information between the respective fixed stations and the mobile station to calculate the position of the mobile station.