Title:
レーダ装置、レーダシステム
Document Type and Number:
Japanese Patent JP7117064
Kind Code:
B2
Abstract:
Provided is technique that can maintain or improve angle resolution by sufficient calibration even when different errors corresponding to directions of arrival of radio waves occur. A radar device 1 is provided with an array antenna 6 including a plurality of reception antennas, a reception analog circuit 7 including a plurality of reception circuits, a digital circuit (a digital unit 3), and a memory 12 that stores a plurality of pieces of calibration data 14 set to calibrate an error occurring in the array antenna 6 and the reception analog circuit 7. The digital circuit approximates and extracts a direction of arrival of radio waves from a target object by executing a digital beam forming processing on a digital signal of a reception signal SR that passes through the reception analog circuit 7, selects a piece of calibration data from the plurality of pieces of calibration data 14 corresponding to the extracted direction of arrival of radio waves, executes a calibration processing on the digital signal using the selected calibration data, and executes a processing of calculating an angle based on a signal after the calibration processing.
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Inventors:
Akamine
Saki Tanaka
Akira Kitayama
Koji Kuroda
Saki Tanaka
Akira Kitayama
Koji Kuroda
Application Number:
JP2018122861A
Publication Date:
August 12, 2022
Filing Date:
June 28, 2018
Export Citation:
Assignee:
Hitachi Astemo, Ltd.
International Classes:
G01S7/40; G01S7/02
Domestic Patent References:
| JP2009243947A | ||||
| JP7318634A | ||||
| JP2004108960A | ||||
| JP2008304417A | ||||
| JP2005077268A | ||||
| JP2009192476A |
Foreign References:
| US20170117946 | ||||
| US5559519 | ||||
| WO2009081981A1 |
Other References:
Schoor, Michael et al.,LOCAL AND GLOBAL CALIBRATION FOR HIGH-RESOLUTION DOA ESTIMATION IN AUTOMOTIVE RADAR,2008 5th IEEE Sensor Array and Multichannel Signal Processing,米国,IEEE,2008年08月22日,p.68-72
Attorney, Agent or Firm:
Patent Attorney Tsutsui International Patent Office