低频UWBSAR极化校准模型  

Polarimetric Calibration Model for Low Frequency UWB SAR

作　　者：邹鲲[1] 梁甸农[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《信号处理》2006年第2期244-247,共4页Journal of Signal Processing

摘　　要：极化校准是多极化合成孔径雷达(synthetic aperture radar,AAR)研究的一个重要组成部分。低频超宽带(ultra wide band,UWB)SAR的极化测量值是频率和方位角的函数,因此普通高频窄带SAR的极化校准模型不再适用。本文首先讨论了定标体的散射特性建模,给出了适合低频UWBSAR的极化校准模型。最后利用计算机仿真,仿真结果与模型分析相一致。Polarimetric Calibration is the most important part of the research of multi-polarimetric SAR. The polarimetric measurements from low frequency UWBSAR is the function of frequency and azimuthal .angle, as a result, the polarimetric calibration model for regular high frequency and narrow band SAR system cannot be used. In this paper, the scattering model of the calibrator is given, and the polarimetric calibration model for low frequency UWBSAR is proposed. The simulation result is consistent with the analysis of the model using the computer simulation.

关 键 词：低频超宽带合成孔径雷达 极化校准 散射矩阵 

分 类 号：TN957.52[电子电信—信号与信息处理] TP393[电子电信—信息与通信工程]