电子学报 ›› 2016, Vol. 44 ›› Issue (6): 1512-1515.DOI: 10.3969/j.issn.0372-2112.2016.06.036

• 科研通信 • 上一篇    下一篇

极化有源雷达校准器的幅相失真分析及修正

林健智, 李卫星, 张月, 陈曾平   

  1. 国防科技大学自动目标识别重点实验室, 湖南长沙 410073
  • 收稿日期:2014-12-01 修回日期:2015-06-18 出版日期:2016-06-25
    • 作者简介:
    • 林健智 男,1987年9月生于广东揭阳.现为国防科技大学博士研究生.研究方向为宽带雷达数据处理.E-mail:jzlingfkd@163.com;李卫星 男,1989年8月生于河南信阳.现为国防科技大学博士研究生.研究方向为阵列信号处理.E-mail:lee_weixing@163.com

Analysis and Modification of Amplitude-Phase Distortion in Polarimetric Active Radar Calibrator

LIN Jian-zhi, LI Wei-xing, ZHANG Yue, CHEN Zeng-ping   

  1. Science and Technology on Automatic Target Recognition Laboratory, National University of Defense Technology, Changsha, Hunan 410073, China
  • Received:2014-12-01 Revised:2015-06-18 Online:2016-06-25 Published:2016-06-25

摘要:

极化有源雷达校准器(Polarimetric Active Radar Calibrator,PARC)可用于宽带高分辨雷达的定标,以使高分辨成像技术能准确刻画雷达目标的细微特征,但其作为有源器件会引入额外失真从而影响系统失真补偿.本文基于成对回波理论及频域失真补偿原理,通过将频域补偿转换为时域滤波,提出截取滤波器系数的方法以修正PARC失真.实测数据结果表明了理论分析和提出的修正方法的正确性,修正后的PARC可近似理想地补偿系统失真.

关键词: 宽带高分辨雷达, 定标, 高分辨成像技术, 雷达目标, 有源器件, 失真补偿, 回波

Abstract:

A polarimetric active radar calibrator (PARC) is used to calibrate wideband high-resolution radars, confirming the high-resolution imaging can accurately characterize radar targets.However, the PARC is an active component and induces additional distortion, affecting the system distortion compensation.This paper was based on the "method of paired echoes" and the distortion compensation in the frequency domain.After transforming the frequency compensation into the filtering in the time domain, we proposed to intercept the time filter for modifying the PARC distortion.The experimental results based on real radar data confirm the accuracy of the theoretical analysis and the proposed modification method and after the modification the PARC can approximately compensate the system distortion.

Key words: wideband high-resolution radar, calibration, high-resolution imaging, radar target, active component, distortion compensation, echo

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