邢孟道,
孙光才
1.西安电子科技大学雷达信号处理国家重点实验室 ??西安 ??710071
2.西安电子科技大学信息感知技术协同创新中心 ??西安 ??710071
基金项目:国家自然科学基金创新群体(61621005)
详细信息
作者简介:刘鑫阁：女，1994 年生，博士生，研究方向为ISAR成像
邢孟道：男，1975 年生，教授，博士生导师，研究方向为雷达成像、动目标检测
孙光才：男，1985 年生，博士，副教授，研究方向为雷达成像、动目标检测
通讯作者:刘鑫阁 liuxinge1994@163.com
中图分类号:TN958计量
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被引次数:0
出版历程
收稿日期:2017-12-21
修回日期:2018-05-02
网络出版日期:2018-07-12
刊出日期:2018-09-01
A High-precision Method of the Rotation Compensation and Cross-range Scaling for ISAR Imaging
Xinge LIU,,Mengdao XING,
Guangcai SUN
1. National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2. Collaborative Innovation Center of Information Sensing and Understand, Xidian University, Xi’an 710071, China
Funds:The Foundation for Innovative Research Groups of the National Natural Science Foundation of China (61621005)
摘要
摘要:传统逆合成孔径雷达(ISAR)成像算法忽略了目标回波的高阶转动相位的影响，导致方位向聚焦效果较差，且无法直接从目标图像中获取目标尺寸信息。该文提出一种转动补偿和方位定标方法。该方法采用回波的全部方位信息，通过构造局部平均多普勒趋势(LADT)信号获取目标回波的多普勒变化趋势。进一步利用随机采样一致(RANSAC)算法估计多普勒调频率及目标有效转动速度，实现高精度转动补偿与方位定标。仿真与实测数据实验验证了该方法的有效性。
关键词:逆合成孔径雷达/
转动补偿/
方位定标/
多普勒调频率/
随机采样一致
Abstract:Traditional Inverse SAR (ISAR) imaging algorithms neglect the impact of high-order rotational phase in the signal, which may make ISAR images of a target defocused. Further, the size of a target can not be obtained from ISAR image directly. In this study, an effective method to achieve the rotation compensation and cross-range scaling for ISAR imaging is proposed. Firstly, all the signals of the target are used to form the Local Average Doppler Trend (LADT) signal. Subsequently, RANdom SAmple Consensus (RANSAC) algorithm is performed to estimate the Doppler rate and effective rotational velocity. Finally, high-precision rotation compensation and cross-range scaling can be accomplished. Simulation and real data experiments validate the effectiveness of the proposed method.
Key words:Inverse SAR (ISAR)/
Rotation compensation/
Cross-range scaling/
Doppler rate/
RANdom SAmple Consensus (RANSAC)
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https://jeit.ac.cn/article/exportPdf?id=00bc71ff-ef2b-4421-96a7-7049a3f995e8
