电子电气工程与控制

基于双向重采样的高分辨率前视成像算法

  • 郑志瀛 ,
  • 谭鸽伟 ,
  • 蒋丁一
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  • 华侨大学 信息科学与工程学院,厦门   361021
.E-mail: tangewei70@163.com

收稿日期: 2023-03-28

  修回日期: 2023-05-04

  录用日期: 2023-06-20

  网络出版日期: 2023-06-27

基金资助

华侨大学研究生科研创新基金(17014082025);华侨大学人才项目(10BS312)

http://hkxb.buaa.edu.cn hkxb@buaa.edu.cn

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E-mail: tangewei70@163.com

Received date: 2023-03-28

  Revised date: 2023-05-04

  Accepted date: 2023-06-20

  Online published: 2023-06-27

摘要

高速平台双基SAR的高速机动特性和双基前视构型使其高分辨率成像面临严峻挑战。在该体制下,发射机以侧视方式发送信号,而高速运动的接收平台在前视模式下接收回波。由于高速度、大加速度的存在,使SAR回波的距离徙动现象以及二维耦合、空变特性都更加严重,传统的“停走停”模型不再适用。为了解决上述问题,提出了适用于高速平台的“非停走停”斜距方程及回波模型,然后通过分析信号中的空变分量及其对回波相位的影响,提出了基于双向重采样的成像算法。该算法有效补偿了SAR回波在距离和方位向的空变相位误差,提高了高速平台双基SAR的前视聚焦性能,通过仿真验证了所提算法的有效性。

本文引用格式

郑志瀛 , 谭鸽伟 , 蒋丁一 . 基于双向重采样的高分辨率前视成像算法[J]. 航空学报, 2024 , 45(4) : 328749 -328749 . DOI: 10.7527/S1000-6893.2023.28749

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