洪文,
空间信息处理与应用系统技术重点实验室 北京 100190
中国科学院空天信息创新研究院 北京 100190
中国科学院大学 北京 100049
基金项目:国家自然科学基金(61431018)
详细信息
作者简介:陈诗强(1990–)，男，中国科学院电子学研究所在读博士生，研究方向为混合极化系统误差分析及相关应用研究。E-mail: chenshiqiang13@mails.ucas.ac.cn
洪文：洪 文(1968–)，女，中国科学院电子学研究所研究员，博士生导师，研究方向为极化/极化干涉SAR处理及应用、三维SAR信号处理、圆迹SAR信号处理以及稀疏微波成像技术等。E-mail: whong@mail.ie.ac.cn
通讯作者:洪文 whong@mail.ie.ac.cn
责任主编：陈思伟 Corresponding Editor: CHEN Siwei中图分类号:TN95
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出版历程
收稿日期:2019-06-27
修回日期:2019-09-04
网络出版日期:2019-09-29
Analysis on the Transmit Distortion of the Circular Polarized Wave Based on the Axial Ratio Parameter
CHEN Shiqiang,HONG Wen,
Key Laboratory of Technology in Geospatial Information Processing and Application System, Beijing 100190, China
Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China
University of Chinese Academy of Sciences, Beijing 100049, China
Funds:The National Natural Science Foundation of China (61431018)
More Information
Corresponding author:HONG Wen, whong@mail.ie.ac.cn
摘要
摘要:简缩极化(CP)模式是一种新型双极化模式。在实际工程应用中，包括简缩极化模式在内的所有双极化模式均无法直接通过外定标的方法补偿发射误差。因而有必要对发射误差所带来的影响进行详细分析。针对极化SAR系统，目前已有****提出使用误差的最大归一化误差(MNE)参数对极化SAR系统的极化质量做分析评估。该文针对发射圆极化波的简缩极化模式提出了一种基于实际发射极化波极化轴比(AR)参数的发射误差分析方法。首先，通过仿真分析不同发射误差源对AR参数的影响，与此同时还展示了相同发射误差源影响下的MNE参数；通过分析对比，总结了AR参数相对MNE参数的3个优点；最后，使用高分三号卫星的实际测量误差数据与圆极化发射波实验系统的实测数据验证了该文提出的发射误差评估方法的有效性。
关键词:极化SAR/
简缩极化/
极化轴比/
发射误差/
最大归一化误差
Abstract:Compact Polarimetric (CP) mode is a new dual-pol mode introduced in the last decade. The main current CP mode transmits circular polarized waves. Data in the form of Stokes parameters obtained by this mode has rotational invariance. In real engineering applications, transmit distortions in all dual-pol modes, including the CP mode, cannot be directly compensated with external calibration methods. Therefore, it is necessary to analysis the influences caused by transmit distortions. Until now, the Maximum Normalized Error (MNE) parameter has already been proposed by existing researches to analyze polarimetric quality of the Polarimetric SAR (PolSAR) system. This paper has proposed an analysis method to analysis the influence of transmit distortions in polarimetric modes with circular polarimetric wave in transmission, based on the Axial Ratio (AR) parameter of real transmitted wave. Firstly, this paper has analyzed the influence of different transmit distortion sources to AR parameter with simulations. Meanwhile, this part has also demonstrated the influence of same distortion sources to the MNE parameter. Through comparison of this two results, this paper has concluded three advantages of the AR parameter over the MNE parameter. At last, the effectiveness of the proposed evaluation method has been verified using real measured GF-3 distortion data and test data obtained by experimental system, which transmit circular polarized waves.
Key words:Polarimetric SAR (PolSAR)/
Compact Polarimetry (CP)/
Axial Ratio (AR)/
Transmit distortion/
Maximum Normalized Error (MNE)
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