Title:
SEGMENTED APERTURE IMAGING AND POSITIONING METHOD OF MULTI-ROTOR UNMANNED AERIAL VEHICLE-BORNE SYNTHETIC APERTURE RADAR
Document Type and Number:
WIPO Patent Application WO/2023/015623
Kind Code:
A1
Abstract:
A segmented aperture imaging and positioning method of a multi-rotor unmanned aerial vehicle-borne synthetic aperture radar, the method comprising: 1) on the basis of an unmanned aerial vehicle-borne synthetic aperture radar system, acquiring a target echo; 2) on the basis of an echo signal, estimating the motion state of a manoeuvring platform; 3) on the basis of the motion state of the platform, segmenting the echo signal; 4) on the basis of the motion state of the platform, performing motion compensation on each echo signal segment; 5) performing two-dimensional Fourier transform on each compensated echo signal segment to obtain a two-dimensional spectrum, and using a series inversion method to decompose the two-dimensional spectrum to obtain a phase filter of each segment; 6) multiplying the two-dimensional spectrum of each segment by the phase filter corresponding to said segment, and then performing two-dimensional inverse Fourier transform on the two-dimensional spectrum to obtain an image of each segment; 7) performing geometric correction on the images of each segment, and then splicing the images of each segment to obtain a full-aperture imaging result; and 8) splicing the trajectory of each segment of the platform to obtain complete trajectory coordinates of the platform.
Inventors:
LUO MEIYIXIANG (CN)
XU FENG (CN)
XU FENG (CN)
Application Number:
PCT/CN2021/115882
Publication Date:
February 16, 2023
Filing Date:
September 01, 2021
Export Citation:
Assignee:
UNIV FUDAN (CN)
International Classes:
G01S13/90
Foreign References:
| CN111190181A | 2020-05-22 | |||
| CN104020471A | 2014-09-03 | |||
| CN109655831A | 2019-04-19 | |||
| CN108344982A | 2018-07-31 | |||
| JP2012093257A | 2012-05-17 |
Other References:
WANG JIA, YANG LEI; GONG MING: "An Imaging Algorithm for High Squint Missile-borne SAR Based on Block Processing", GUIDANCE & FUZE, vol. 34, no. 3, 30 September 2013 (2013-09-30), XP093034319, ISSN: 1671-0576
Attorney, Agent or Firm:
SHANGHAI DANRONG & ZONGDE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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