Title:
SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND RADAR DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/162188
Kind Code:
A1
Abstract:
This signal processing device (13) comprises a beat signal acquisition unit (71) and is configured such that after radio waves are transmitted to an object under inspection, which moves relative to a radar platform, from each of a plurality of transmitting antennas (31-1) to (31-M) arranged in a row on the radar platform, the reflected waves of the radio waves from the object under inspection are received by each of a plurality of receiving antennas (41-1) to (41-N) arranged in a row on the radar platform at installation positions different from the installation positions of the plurality of transmitting antennas (31-1) to (31-M), and the beat signal acquisition unit (71) acquires a beat signal generated from the received signal of the reflected waves. Further, the signal processing device (13) further comprises: a signal conversion unit (72) that converts each beat signal acquired by the beat signal acquisition unit (71) into a signal in a four-dimensional wavenumber space and outputs each signal in the four-dimensional wavenumber space; a phase error elimination unit (73) that eliminates a phase error associated with a difference between the installation positions of the plurality of transmitting antennas (31-1) to (31-M) and the installation positions of the plurality of receiving antennas (41-1) to (41-N), which are included in each signal in the four-dimensional wavenumber space output from the signal conversion unit (72); and an image generation unit (74) that generates a three-dimensional radar image of the object under inspection from the signal in the four-dimensional wavenumber space after the phase error is eliminated by the phase error elimination unit (73).
Inventors:
KITAMURA TAKAYUKI (JP)
KAGEME SATOSHI (JP)
KAGEME SATOSHI (JP)
Application Number:
PCT/JP2022/008107
Publication Date:
August 31, 2023
Filing Date:
February 28, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01S7/02; G01S13/34; G01S13/89
Foreign References:
| JP2020530562A | 2020-10-22 | |||
| JP6921339B1 | 2021-08-18 | |||
| JP2017223575A | 2017-12-21 | |||
| US20120280851A1 | 2012-11-08 |
Other References:
KOICHI KOBAYASHI: "On near-field far transformation for antenna and radar scattering cross sections", IEICE TECHNICAL REPORT, vol. 115, no. 144 (EMT2015-41), 9 July 2015 (2015-07-09), pages 185 - 190, XP009548817, ISSN: 0913-5685
MODI ANUJ Y.; BALANIS CONSTANTINE A.; BIRTCHER CRAIG R.; SHAMAN HUSSEIN N.: "New Class of RCS-Reduction Metasurfaces Based on Scattering Cancellation Using Array Theory", IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, IEEE, USA, vol. 67, no. 1, 1 January 2019 (2019-01-01), USA, pages 298 - 308, XP011705887, ISSN: 0018-926X, DOI: 10.1109/TAP.2018.2878641
MODI ANUJ Y.; BALANIS CONSTANTINE A.; BIRTCHER CRAIG R.; SHAMAN HUSSEIN N.: "New Class of RCS-Reduction Metasurfaces Based on Scattering Cancellation Using Array Theory", IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, IEEE, USA, vol. 67, no. 1, 1 January 2019 (2019-01-01), USA, pages 298 - 308, XP011705887, ISSN: 0018-926X, DOI: 10.1109/TAP.2018.2878641
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
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