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高速机动目标多普勒解模糊高分辨成像方法

刘丰恺 冯存前 黄大荣 郭新荣 韩立珣

刘丰恺, 冯存前, 黄大荣, 等 . 高速机动目标多普勒解模糊高分辨成像方法[J]. 北京航空航天大学学报, 2021, 47(1): 150-158. doi: 10.13700/j.bh.1001-5965.2019.0648
引用本文: 刘丰恺, 冯存前, 黄大荣, 等 . 高速机动目标多普勒解模糊高分辨成像方法[J]. 北京航空航天大学学报, 2021, 47(1): 150-158. doi: 10.13700/j.bh.1001-5965.2019.0648
LIU Fengkai, FENG Cunqian, HUANG Darong, et al. High-resolution imaging algorithm of high-speed maneuvering target with Doppler ambiguity removal[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(1): 150-158. doi: 10.13700/j.bh.1001-5965.2019.0648(in Chinese)
Citation: LIU Fengkai, FENG Cunqian, HUANG Darong, et al. High-resolution imaging algorithm of high-speed maneuvering target with Doppler ambiguity removal[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(1): 150-158. doi: 10.13700/j.bh.1001-5965.2019.0648(in Chinese)

高速机动目标多普勒解模糊高分辨成像方法

doi: 10.13700/j.bh.1001-5965.2019.0648
基金项目: 

国家自然科学基金 61701528

陕西省自然科学基金 2019JQ-497

中国博士后科学基金 2019M661508

空军工程大学校长基金 XZJK2019030

详细信息
    作者简介:

    刘丰恺  男, 硕士研究生。主要研究方向:ISAR成像及自聚焦

    冯存前  男, 博士, 教授, 博士生导师。主要研究方向:目标探测与识别、雷达信号处理

    郭新荣  女, 硕士, 讲师。主要研究方向:ISAR成像及运动补偿

    韩立珣, 男, 博士研究生。主要研究方向:雷达信号处理

    通讯作者:

    黄大荣, 男, 博士, 讲师。主要研究方向:雷达总体设计、雷达成像及运动补偿黄大荣, E-mail: rsphdr@163.com

  • 中图分类号: V221+.3;TB553

High-resolution imaging algorithm of high-speed maneuvering target with Doppler ambiguity removal

Funds: 

National Natural Science Foundation of China 61701528

Natural Science Foundation of Shaanxi Province, China 2019JQ-497

China Postdoctoral Science Foundation 2019M661508

Foundation of Air Force Engineering University President XZJK2019030

  • 摘要:

    针对目标高速机动导致ISAR成像结果产生距离徙动(MTRC)和多普勒模糊的问题,提出一种新的高速机动目标ISAR成像方法,用于解算距离徙动下的多普勒模糊难题。首先,将原始信号变换至图像域,提取最强散射点,估计该点对应的信号调频率,并基于图像最大对比度准则估计多普勒模糊数。然后,重构回波信号的同时矫正距离徙动,并利用CLEAN技术降低运算量和减小噪声对成像结果的影响,获得高速机动目标无模糊的高分辨ISAR图像。仿真实验结果证明了所提方法的有效性和低信噪比下的强鲁棒性。

     

  • 图 1  ISAR转台成像示意图

    Figure 1.  Schematic diagram of ISAR turntable imaging

    图 2  多普勒模糊

    Figure 2.  Doppler ambiguity

    图 3  不同多普勒模糊数下的判定区域

    Figure 3.  Judgment region under different Doppler ambiguity numbers

    图 4  距离徙动补偿

    Figure 4.  Compensation of migration through range cells

    图 5  仿真飞机

    Figure 5.  Simulated aircraft

    图 6  不同算法下一维距离像对比

    Figure 6.  Comparison of one-dimensional range profile among different methods

    图 7  不同算法结果对比

    Figure 7.  Comparison of results of different methods

    图 8  不同信噪比下的对比度

    Figure 8.  Contrast ratio under different SNRs

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出版历程
  • 收稿日期:  2019-12-29
  • 录用日期:  2020-04-17
  • 网络出版日期:  2021-01-20

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