机载三通道SAR/GMTI快速目标运动参数估计

doi:10.3969/j.issn.1001-2400.2010.02.010

J4 ›› 2010, Vol. 37 ›› Issue (2): 235-241.doi: 10.3969/j.issn.1001-2400.2010.02.010

机载三通道SAR/GMTI快速目标运动参数估计

钱江¹;吕孝雷¹;邢孟道¹;李凉海²;张振华²

(1. 西安电子科技大学雷达信号处理重点实验室，陕西西安 710071;
2. 中国航天科技集团七〇四所，北京 100076)

收稿日期:2008-12-11 出版日期:2010-04-20 发布日期:2010-06-03
通讯作者: 钱江
作者简介:钱江(1980-)，男，西安电子科技大学博士研究生，E-mail: 7anjiang@gmail.com．
基金资助:
国家自然科学基金资助项目(60890072);武器装备预研基金资助项目(9140C010209090C01,9140A21020609DZ01);博士点基金资助项目(200807010002)

Parameter estimation of the fast moving target based on tri-channel airborne SAR-GMTI

QIAN Jiang¹;Lü Xiao-lei¹;XING Meng-dao¹;LI Liang-hai²;ZHANG Zhen-hua²

(1. Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071， China;
2. The No. 704 Inst. of the China Aerospace Science and Tech. Group, Beijing 100076， China)

Received:2008-12-11 Online:2010-04-20 Published:2010-06-03
Contact: QIAN Jiang

摘要/Abstract

摘要：

针对常规SAR/GMTI系统无法获取快速目标信息的问题，提出一种基于解PRF模糊的快速目标检测和运动参数估计方法．首先将三通道SAR/GMTI数据在方位压缩后的距离频域两两对消抑制杂波，然后进行PRF模糊数估计．在方位压缩后的距离频域利用快速目标运动引起的模糊数与目标直线轨迹斜率的对应关系，通过Radon变换来搜索模糊数，同时得到目标轨迹直线斜率．已知直线斜率后进行方位徙动校正，并以最小熵准则搜索实现方位向聚焦，进而通过距离匹配滤波实现快速目标成像．仿真和实测数据结果均验证了该方法的有效性．

关键词: 合成孔径雷达/地面运动目标检测, 快速目标, PRF模糊, Radon变换

Abstract:

In a conventional SAR/GMTI system, it is hard to obtain the information on the fast moving target. An approach for fast moving target indication and motion parameter estimation is proposed based on PRF ambiguity resolving. In the range frequency and compressed azimuth time domain of Tri-channel SAR/GMTI data, the clutter is cancelled by the mutual channel, and the PRF ambiguity number can be estimated from the remaining signals. This approach utilizes the relation between the line slope and the ambiguity number of the fast moving target in the domain to get the ambiguity number and thus the slope of the line through Radon transform. Azimuth focusing under the criterion of entry-minimization is implemented following effectiveness azimuth migration compensation, and the fast moving target is imaged after range match filtering. The results of simulation and real data processing show the effectiveness of the approach.

Key words: SAR/GMTI, fast moving target, PRF ambiguity, radon transform

钱江;吕孝雷;邢孟道;李凉海;张振华. 机载三通道SAR/GMTI快速目标运动参数估计[J]. J4, 2010, 37(2): 235-241.

QIAN Jiang;Lü Xiao-lei;XING Meng-dao;LI Liang-hai;ZHANG Zhen-hua. Parameter estimation of the fast moving target based on tri-channel airborne SAR-GMTI[J]. J4, 2010, 37(2): 235-241.

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机载三通道SAR/GMTI快速目标运动参数估计

Parameter estimation of the fast moving target based on tri-channel airborne SAR-GMTI

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