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Title:
ANGLE-OF-ARRIVAL SPECIFICATION DEVICE, TOLL COLLECTION SYSTEM, AND ANGLE-OF-ARRIVAL SPECIFICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/158876
Kind Code:
A1
Abstract:
This angle-of-arrival specification device uses a plurality of antenna elements to receive a reception signal having a plurality of subcarriers and specifies the angle-of-arrival of the reception signal. The angle-of-arrival specification device has signal processing units for extracting predefined specific subcarriers (pilot carriers) from the reception signals received by each of the plurality of antenna elements and an angle specification unit for specifying the angle of arrival on the basis of the phase difference between the specific subcarriers extracted by each of the signal processing units. The signal processing units are each provided with a frequency adjustment unit for adjusting the deviation of the frequency of the reception signal received by the corresponding antenna element from a defined value and a filter unit for extracting the specific subcarrier through bandpass filtering of the reception signal that has been subjected to frequency adjustment.

Inventors:
ONO YOSHIHITO (JP)
MAEDA TAKASHI (JP)
Application Number:
JP2017/008089
Publication Date:
September 07, 2018
Filing Date:
March 01, 2017
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND MACH SYSTEMS LTD (JP)
International Classes:
G01S3/48
Domestic Patent References:
WO2008136200A12008-11-13
Foreign References:
JP2016194454A2016-11-17
JP2007281991A2007-10-25
JP2005257595A2005-09-22
EP2941069A22015-11-04
Attorney, Agent or Firm:
MORI Ryuichirou et al. (JP)
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