Method for SAR-GMTI moving target radial velocity estimation and relocation based on road network information assistance in multi-satellite formation system

被引：0

作者：

Li X. ^{[1
]}

Yang Z. ^{[1
]}

He S. ^{[2
]}

Liao G. ^{[1
]}

Han C. ^{[1
]}

Jiang Y. ^{[3
]}

机构：

[1] National Laboratory of Radar Signal Processing, Xidian University, Xi'an

[2] Communication and Information Engineering College, Xi'an University of Science and Technology, Xi'an

[3] Shanghai Institute of Satellite Engineering, Shanghai

来源：

Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2023年 / 45卷 / 03期

关键词：

ground moving target indication (GMTI); multi-satellite configuration; radial velocity estimation; synthetic aperture radar (SAR); terrain interferometric phase;

D O I：

10.12305/j.issn.1001-506X.2023.03.02

中图分类号：

学科分类号：

摘要：

In hybrid multi-baseline system configuration, terrain elevation of moving target can result in the target radial velocity estimation and relocation bias. To address this problem, we propose a moving target radial velocity estimation and relocation method based on the road network information assistance. Firstly, the elevation interferometric phase of moving target is estimated by the clutter sample data in the target neighborhood, and the height-difference between imaging position and real position of target is compensated based on prior road network information. Secondly, the target radial velocity can be estimated by adaptive matched filtering algorithm. Further, the target radial velocity estimation and relocation results are matched with the road network information to eliminate the false estimation. Finally, the radial velocity estimation and relocation results can be fed back to target elevation compensation processing. Final results are obtained by iterative processing. The experimental results of multi-satellite simulation data demonstrate that the proposed method can effectively eliminate the impact of target elevation, as well as improve the performance of target velocity estimation and relocation in the observation scene with topographic fluctuation. © 2023 Chinese Institute of Electronics. All rights reserved.

引用

页码：629 / 637

页数：8

共 30 条

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