Title:
ESTIMATION DEVICE, ESTIMATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2024/069740
Kind Code:
A1
Abstract:
One aspect of the present invention provides an estimation device comprising a control unit that uses a reception signal resulting from a transmission signal that is an optical signal transmitted by a transmitter being propagated through an optical fiber to estimate a vibration position that is a position on the optical fiber where vibration has been induced by the vibration of the outside environment. The control unit executes estimation processing comprising: compensation processing including wavelength dispersion compensation processing for compensating for wavelength dispersion of the reception signal; transmission signal estimation processing for estimating the transmission signal on the basis of a result of the wavelength dispersion compensation processing; wavelength dispersion re-application processing for re-application the wavelength dispersion to a result of the compensation processing; and vibration position estimation processing for estimating the vibration position on the basis of the result of the transmission signal estimation processing and the result obtained after inverse mapping of a mapping corresponding to the vibration position and indicating changes of the transmission signal due to propagation through the optical fiber acting on the result of the wavelength dispersion re-application processing.
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Inventors:
SASAI TAKEO (JP)
YAMAZAKI ETSUSHI (JP)
NISHIZAWA HIDEKI (JP)
SONE YOSHIAKI (JP)
KISAKA YOSHIAKI (JP)
YAMAZAKI ETSUSHI (JP)
NISHIZAWA HIDEKI (JP)
SONE YOSHIAKI (JP)
KISAKA YOSHIAKI (JP)
Application Number:
PCT/JP2022/035896
Publication Date:
April 04, 2024
Filing Date:
September 27, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01H9/00
Domestic Patent References:
| WO2010134321A1 | 2010-11-25 | |||
| WO2022185469A1 | 2022-09-09 |
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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