杨利超^1,,,
邢孟道¹,
孙光才¹,
王安乐²,
盛佳恋³
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.中国人民解放军空军预警学院 ??武汉 ??430017
3.上海无线电设备研究所 ??上海 ??201109
基金项目:国家自然科学基金(61621005)，上海市自然科学基金(17ZR1428700)

详细信息

作者简介:杨利超：男，1993年生，博士，研究方向为逆合成孔径雷达成像
邢孟道：男，1975年生，教授，研究方向为雷达探测、雷达成像、运动目标检测成像
孙光才：男，1984年生，副教授，研究方向为新体制雷达成像、运动目标检测成像

通讯作者:杨利超　ylc9310@163.com

中图分类号:TN957

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出版历程

收稿日期:2018-07-04
修回日期:2019-01-10
网络出版日期:2019-01-30
刊出日期:2019-06-01

A Novel ISAR Imaging Algorithm for Microwave Photonics Radar

Lichao YANG^1,,,
Mengdao XING¹,
Guangcai SUN¹,
Anle WANG²,
Jialian SHENG³
1. National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2. Microwave Photonics Center, Wuhan Electronic Institute, Wuhan 430017, China
3. Shanghai Radio Equipment Research Institute, Shanghai 201109, China
Funds:The National Natural Science Foundation of China (61621005), The Natural Science Foundation of Shanghai (17ZR1428700)


摘要
摘要:微波光子雷达发射信号带宽大、波长短，能够实现分辨率更高的逆合成孔径雷达(ISAR)成像。但带宽大、波长小的回波信号也导致传统成像算法对目标转动分量的近似不成立，使得传统算法无法应用。在微波光子雷达成像中，目标转动分量在回波包络中形成空变的距离弯曲项，在方位相位中形成空变的2次相位误差，导致ISAR图像散焦。该文针对微波光子雷达系统提出一种新的ISAR成像算法，该算法同时考虑了目标转动分量对回波包络和相位的影响，以包络相关值为目标函数值迭代估计目标转速，根据转速估计值，在距离向进行重采样对齐包络，在方位向构造空变的方位补偿函数校正转动相位。仿真和实测数据的处理结果证明了该算法的有效性。
关键词:微波光子雷达/
逆合成孔径雷达/
转速估计/
包络对齐/
方位相位补偿
Abstract:Microwave photonics radar generates signals with large bandwidth and small wavelength. It has capability of ultra-high resolution of Inverse?Synthetic?Aperture Radar(ISAR) image. Because the approximation of rotational components is not tenable, traditional ISAR imaging algorithm is not suitable to microwave photonics radar. In the microwave photonics radar imaging, the rotational components result in range curvature and quadratic phase error changing with distance. To solve this problem, an effective ISAR imaging algorithm is put forward which considers the influence of the target’s rotational component to echo envelope and phase. The value of envelope correlation is take as objective function and the target’s rotate speed is estimated by iteration; The range curvature is corrected by time resampling; The quadratic phase error is compensated by azimuth compensation function. Both simulated and real-measured data experimental results confirm the effectiveness of the proposed algorithm.
Key words:Microwave photonics radar/
Inverse Synthetic Aperture Radar (ISAR)/
Rotate speed estimation/
Envelope correction/
Phase compensation



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