US 12,436,271 B2
Phase history extraction for moving target
Adour Vahe Kabakian, Monterey Park, CA (US); David Wayne Payton, Calabasas, CA (US); Kangyu Ni, Calabasas, CA (US); and Yuri Owechko, Newbury Park, CA (US)
Assigned to The Boeing Company, Arlington, VA (US)
Filed by The Boeing Company, Arlington, VA (US)
Filed on Apr. 3, 2023, as Appl. No. 18/295,109.
Prior Publication US 2024/0329235 A1, Oct. 3, 2024
Int. Cl. G01S 13/90 (2006.01)
CPC G01S 13/9027 (2019.05) [G01S 13/9054 (2019.05)] 20 Claims
OG exemplary drawing
 
1. A method for synthetic aperture radar (SAR) phase history extraction, the method comprising:
receiving, at a SAR system, a set of SAR phase history data derived from a plurality of return signals, the plurality of return signals produced by the SAR system illuminating a scene with a plurality of radar pulses;
obtaining a region of interest (ROI) corresponding to a moving target within the scene, wherein obtaining the ROI includes determining a distance range of the ROI;
determining a doppler shift frequency range for the moving target based at least in part on an azimuth angle spread corresponding to the ROI and a known approximate trajectory of the moving target; and
filtering the SAR phase history data to give extracted phase history corresponding to the moving target based at least in part on the doppler shift frequency range, and wherein filtering the SAR phase history includes truncating the SAR phase history based on the distance range of the ROI.