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:
Aug. 06, 2019
Filed:
Nov. 02, 2017
Murata Manufacturing Co., Ltd., Kyoto, JP;
Koichi Takizawa, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A mobile station transmits a first radio signal, a reference station transmits a second radio signal. Fixed stations extract phase differences (Δφmf) to (Δφmf), respectively, between a carrier included in the first radio signal and reference clocks of the respective fixed stations. The fixed stations extract phase differences (Δφsf) to (Δφsf), respectively, between a carrier included in the second radio signal and the reference clocks of the respective fixed stations. A server cancels phase offsets (φf) to (φf) of the respective fixed stations using phase difference information between the mobile station and each of the fixed stations and phase difference information between the reference station and each of the fixed stations, obtains distance information between each of the fixed stations and the mobile station, and calculates a position of the mobile station.