Title:
ANGLE ERROR DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2022181637
Kind Code:
A
Abstract:
To provide an angle error detection device capable of grasping and correcting a change in a phase following passage of a sum signal and a differential signal through a signal path in real time when performing angle error detection of an antenna used for tracking reception.SOLUTION: In an angle error detection device 12 for detecting an angle error of a reception direction of a frequency signal from a tracked object, an angle error detection part 42 detects an angle error on the basis of a value of an imaginary part of a multiplication vector of a vector of a differential signal obtained by performing quadrature demodulation of a sum signal and a differential signal of a frequency signal received at a different position of an antenna, and a conjugated vector of a vector of the sum signal. A correction value acquisition part 44 acquires a correction value for setting a value of a real part to zero by correcting a phase of the differential signal on the basis of a value of the real part of the multiplication vector, and a phase correction part 45 corrects a phase of the differential signal on the basis of the correction value.SELECTED DRAWING: Figure 6
Inventors:
KOBAYASHI KAORU
Application Number:
JP2021088680A
Publication Date:
December 08, 2022
Filing Date:
May 26, 2021
Export Citation:
Assignee:
NIHON DEMPA KOGYO CO
International Classes:
G01S3/42; G01S3/22; G01S13/44
Attorney, Agent or Firm:
Patent Attorney Corporation Yayoi Patent Office