现代雷达2025，Vol.47Issue(10)：42-49,8.DOI:10.16592/j.cnki.1004-7859.2025062901
基于高阶转动补偿的群目标ISAR成像方法
A Method for Multi-target ISAR Based on High-order Rotation Compensation
童新元 1王建 1吕文欣 1范崇祎 1黄晓涛 1王壮1
作者信息
- 1. 国防科技大学 电子科学学院,湖南 长沙 410073
- 折叠
摘要
Abstract
Due to the presence of multiple targets,the coherence of radar echoes is disrupted,rendering traditional inverse synthet-ic aperture radar(ISAR)imaging methods ineffective.This paper addresses the challenges of spectrum aliasing and separation dif-ficulties in ISAR imaging of formation targets by analyzing their formation and motion characteristics.We propose a high-density multi-target ISAR imaging method based on Keystone transform and high-order rotation phase compensation.First,the echoes of multiple targets are processed via blind signal separation to generate an initial composite image of the target group.The Keystone transform is applied to migration through resolution cell(MTRC)and minor radial velocity variations among individual targets.Next,the equivalent rotation angle and radial position of the target group's center are estimated using Brent method,and a high-or-der Doppler phase factor is constructed to compensate for Doppler aliasing caused by long observation times.Finally,fine-resolu-tion imaging of each target is achieved through DBSCAN clustering.Simulation results demonstrate that the proposed method ena-bles well-focused imaging of group targets while accurately resolving their relative spatial relationships.Furthermore,auto-focused single-target images deliver significantly finer details,thereby validating the correctness and effectiveness of the proposed approach.关键词
逆合成孔径雷达/编队目标/Keystone变换/转动补偿/Brent算法Key words
inverse synthetic aperture radar/formation target/Keystone/rotation compensation/Brent分类
电子信息工程引用本文复制引用
童新元,王建,吕文欣,范崇祎,黄晓涛,王壮..基于高阶转动补偿的群目标ISAR成像方法[J].现代雷达,2025,47(10):42-49,8.
