Title:
RADAR SIGNAL PROCESSING DEVICE, RADAR SIGNAL PROCESSING METHOD, AND TARGET OBSERVATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/089713
Kind Code:
A1
Abstract:
This radar signal processing device (30) comprises: a Fourier transform unit (34) that performs a Fourier transform in the azimuth direction on an image signal representing a synthetic aperture radar image; a map division unit (35) that divides, in a Doppler frequency direction, a range-Doppler frequency map indicated by the signal after the Fourier transform by the Fourier transform unit (34) and outputs a signal indicating each of divided maps which are a plurality of range-Doppler frequency maps resulting from the division; an inverse Fourier transform unit (36) that performs an inverse Fourier transform on the signal representing each of the divided maps output from the map division unit (35) and outputs divided reproduction signals which are each of the signals after the inverse Fourier transform; a gain calculation unit (37) that calculates a false image suppression gain for suppressing a target false image appearing in the synthetic aperture radar image using the image signal and each of the divided reproduction signals output from the inverse Fourier transform unit (36); and a false image suppression unit (38) that multiplies the image signal by the false image suppression gain calculated by the gain calculation unit (37).
Inventors:
YAMAOKA TOMOYA (JP)
Application Number:
PCT/JP2021/042352
Publication Date:
May 25, 2023
Filing Date:
November 18, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01S13/90
Domestic Patent References:
| WO2019176016A1 | 2019-09-19 |
Foreign References:
| JPH07244158A | 1995-09-19 | |||
| JPS62263485A | 1987-11-16 | |||
| JP2011247597A | 2011-12-08 | |||
| JP2011169869A | 2011-09-01 | |||
| JP2012093257A | 2012-05-17 |
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
Download PDF:
Previous Patent: VEHICLE-CABIN RADAR DEVICE AND VEHICLE
Next Patent: SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE
Next Patent: SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE