电子学报 ›› 2016, Vol. 44 ›› Issue (8): 1962-1968.DOI: 10.3969/j.issn.0372-2112.2016.08.027

• 学术论文 • 上一篇    下一篇

一种用于单脉冲成像的自聚焦算法

吴迪1, 杨成杰1, 朱岱寅1, 沈明威2   

  1. 1. 南京航空航天大学雷达成像与微波光子技术教育部重点实验室, 江苏南京 210016;
    2. 河海大学计算机与信息学院, 江苏南京 211100
  • 收稿日期:2015-01-13 修回日期:2015-07-31 出版日期:2016-08-25 发布日期:2016-08-25
  • 通讯作者: 吴迪
  • 作者简介:杨成杰 女,1992年8月出生于江苏扬州.2010年本科毕业于南京航空航天大学信息工程专业.现为南航电子信息工程学院硕士研究生,主要研究方向为机载雷达前视成像.E-mail:yangchenjie0807@126.com
  • 基金资助:
    国家自然科学基金(No.61301212,No.61201459);航空科学基金(No.20132052030);中国博士后科学基金(No.2012M511750);江苏省博士后科研资助计划(No.1301027B)

An Autofocusing Algorithm for Monopulse Imaging

WU Di1, YANG Cheng-jie1, ZHU Dai-yin1, SHEN Ming-wei2   

  1. 1. Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China;
    2. College of Computer & Information Engineering, Hohai University, Nanjing, Jiangsu 211100, China
  • Received:2015-01-13 Revised:2015-07-31 Online:2016-08-25 Published:2016-08-25

摘要: 本文针对单脉冲成像技术在实际处理中,鉴角曲线误差引起的方位分辨率下降问题,提出了一种用于单脉冲成像的自聚焦算法.算法通过迭代,自动从雷达接收数据中挑选孤立强散射点回波信号精确估计实际鉴角曲线,将其用于单脉冲成像处理中,实现图像方位自聚焦.仿真及实测数据处理结果表明,该方法能够有效降低测角误差对成像效果的影响,且对多数地貌场景数据具备鲁棒性,是一种实际可行的单脉冲成像自聚焦算法.

关键词: 单脉冲成像, 雷达成像, 前视成像, 自聚焦

Abstract: To overcome the deterioration of azimuth resolution caused by errors of monopulse response curve (MRC) in practical processing,this paper proposes an autofocusing algorithm for monopulse imaging technique.By applying iterative steps,this algorithm automatically extracts the echo signals of isolated strong scatterers from the received data,and employs them to accurately estimate the actual MRC.The estimated curve is then used in the procedure of monopulse imaging to autofocus the image in azimuth.As is verified by simulation and experimental results,this algorithm can effectivelyreduce the impact of MRC errors on monopulse imaging and is robust to most of the ground scenes,making it feasible in practical processing.

Key words: monopulse imaging, radar imaging, forward-looking imaging, autofocusing

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