采用含22.5°二面角反射器无源定标体组的极化校准方法  

Polarimetric calibration method using passive calibrator set including 22.5° dihedral angle reflector

作　　者：张道明 邓晓波 张勇 ZHANG Daoming;DENG Xiaobo;ZHANG Yong(LEIHUA Electronic Technology Institute,Aviation Industry Corporation of China,Wuxi 214063,China)

机构地区：[1]中国航空工业集团公司雷华电子技术研究所,江苏无锡214063

出　　处：《国防科技大学学报》2022年第6期95-102,共8页Journal of National University of Defense Technology

基　　金：工信部预研基金资助项目(MJ-2017-F-12);航空基金资助项目(ASFC-201920007002)。

摘　　要：在实际应用中,采用传统Whitt点目标无源定标方法往往会出现极化失真矩阵求解错误从而无法正确进行校准的问题。针对这一问题,在剖析常用的Whitt算法失真矩阵求解错误原因的基础上,提出了一种采用含22.5°二面角反射器的定标体组的新定标方法,包括点目标定标体组合、极化散射矩阵测量值预处理方法及特征值配对准则,可有效避免特征值配对错误导致校准结果错误的问题。仿真试验验证了所提方法的有效性和稳健性。In practical applications, the traditional Whitt passive point target calibration algorithm often leads to the problem of incorrect solution of polarimetric distortion matrix, which makes it impossible to calibrate the polarimetric distortion correctly. To solve this problem, on the basis of analyzing the cause of failure in solving the distortion matrix of the commonly used Whitt algorithm, a new polarimetric calibration method using 22.5° dihedral was proposed, including a new calibrator set, a preprocessing procedure for measured polarimetric scatter matrix and a new eigenvalue match rule, which could prevent wrong eigenvalue match result and thus wrong calibration result effectively. Simulation results verify its effectiveness and robustness.

关 键 词：极化校准 点目标 Whitt算法 特征值 22.5°二面角反射器 

分 类 号：TN95[电子电信—信号与信息处理]