雷达目标极化散射矩阵的瞬时测量方法  

Instantaneous Measurement of Radar Target Polarization Scattering Matrix

作　　者：王雪松[1] 王剑[2] 王涛[1] 李永祯[1] 徐振海[1] 施龙飞[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]南京理工大学,江苏南京210094

出　　处：《电子学报》2006年第6期1020-1025,共6页Acta Electronica Sinica

基　　金：全国优秀博士论文专项资金(No.08100101);国防预研计划项目(No.41303517);国防预研基金项目(No.51403010403KG0173);新世纪优秀人才支持计划项目(No.NCET-04-0997)

摘　　要：目标极化特性的瞬时测量是极化雷达探测与目标识别等领域非常关心的基础性问题.本文针对频移脉冲波形,研究了互易条件下目标极化特性瞬时测量问题.建立了瞬时极化测量雷达的目标回波模型,在深入分析了目标回波极化特性的基础上,提出了一种基于离散时间傅立叶变换的完整极化散射矩阵频域估计算法,证明其为无偏估计,给出了估计精度的理论公式和实验结果.The topic of instantaneous measurement of radar target polarization characteristics is of great importance in such fields as polarimetric radar and target recognition. In this paper,the problem of polarization scattering matrix measurement of the reciprocal target is discussed for the case of frequency-shifted waveforms. Radar echoes are modeled for the instantaneous polarization measurement. On the basis of target returns＇ polarization characteristics, a frequency-domain estimate algorithm is presented for the instantaneous polarization measurement using the discrete time Fourier transform （DTFT）. Algorithm performance is evaluated and theoretical formulae are derived. Efficiency of this algorithm is validated by experiment results.

关 键 词：极化测量雷达 目标 极化散射矩阵 互易性 瞬时测量 频移脉冲波形 

分 类 号：TN95[电子电信—信号与信息处理]