摘要
低频超宽带合成孔径雷达辐射定标过程中,定标体的散射特性表现为低频谐振散射特性。常规散射特性计算方法如矩量法中的广义阻抗矩阵在谐振频率点上条件数过大,导致计算不准确。本文给出了基于奇异值分解的方法得到较为精确的计算值。为了克服矩量法每次只能计算一个频点的散射特性,本文给出了基于渐进波形估计的方法,获得定标体超宽带散射特性。
During the radiometric calibration of the low frequency UWB SAR system, the scattering model of the calibrators should be regarded as the low frequency resonance scattering. The regular numerical algorithm is MOM, whose general impedance matrix has a large condition number at the resonance frequency points, which brings an inaccurate result. In this paper, the SVD method for MOM is given to bring the accurate result at the resonance frequency points. The Asymptotic Waveform Evaluation （AWE） method is given to calculate the UWB scattering of the calibrator, because of the time-consuming of the MOM.
出处
《信息与电子工程》
2005年第1期14-17,共4页
information and electronic engineering
基金
"十五"国防预先研究资助项目(41307020203)
关键词
雷达工程
散射特性
渐进波形估计
低频超宽带合成孔径雷达
奇异值分解
矩量法
radar engineering
scattering
Asymptotic Waveform Evaluation
low frequency Ultra Wide Band Synthetic Aperture Radar
Singular Value Decomposition
Method of Moment
