一种补偿时变姿态的Whitt极化定标改进算法

发布时间：2018-05-21 05:15

本文选题：机载SAR + 极化定标　；参考：《电子与信息学报》2017年10期

【摘要】：极化定标是目标检测、分类识别和定量反演等实际应用的重要前提。载机平台的姿态变化会引起极化指向角的变化,从而降低极化定标精度。针对这一问题前人已提出了基于Whitt算法的改进算法。该文详细分析了这些改进算法存在的问题,并在此基础上提出了一种考虑通道不平衡的逐脉冲补偿时变姿态的极化定标算法,能够有效地抑制姿态变化对极化定标的影响。仿真实验和实测数据处理验证了该算法的有效性。
[Abstract]:Polarization calibration is an important prerequisite for target detection, classification recognition and quantitative inversion. The attitude change of the platform will lead to the change of polarization pointing angle, which will reduce the precision of polarization calibration. An improved algorithm based on Whitt algorithm has been proposed to solve this problem. In this paper, the problems of these improved algorithms are analyzed in detail, and on the basis of these problems, a new polarization calibration algorithm is proposed, which considers the channel imbalance and compensates the time-varying attitude by pulse, which can effectively suppress the influence of the attitude change on the polarization calibration. The effectiveness of the algorithm is verified by simulation and data processing.
【作者单位】：中国科学院电子学研究所;微波成像技术国家级重点实验室;中国科学院大学;
【基金】：国家863计划项目(2013AA092105)~~
【分类号】：TN957.52

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