运动目标PSM的时分极化测量方法研究  

Time division PSM measurement for moving target

作　　者：何密[1] 王雪松[1] 李永祯[1] 刘勇[1] 肖顺平[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《电波科学学报》2009年第5期955-960,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金重点项目(No.60736006);国家自然科学基金青年科学基金项目(No.60802078);"十一五"总装备部武器装备预研项目(No.51309060305)

摘　　要：针对现有的时分极化测量体制雷达,通过对波形产生器进行微小的改造,在相邻脉冲内生成正负斜率线性调频信号,提出一种可以在相邻的两个脉冲周期内获得高速运动目标的极化散射矩阵(PSM)的方法。利用正负斜率线性调频脉冲对斜率相反的性质,在一个极化切换周期内估计目标多普勒频移和时延,定义极化校准矩阵,同时利用相邻两个脉冲回波的信息,通过对极化校准矩阵求逆,精确获得极化散射矩阵四个元素的值。仿真结果中与传统方法进行了对比,证明了该方法的可行性和优越性。For the time division polarization measurement radar, the up and down chirps are transmitted in the radar wave generator. Then two adjoining pulse periods a new method is proposed through tiny change of the to obtain the polarization scattering matrix （PSM） for the high-speed moving target during two adjoining pulse periods. The Doppler frequency shift and the delay time of the target are esti- mated in one polarization switching period using the property of opposite slopes of the up and down chirps. Then define the polarization calibration matrix, and accu- rately acquire the four elements of PSM by inversing the polarization calibration matrix using the two adjoining echoes at the same time. The simulation proves the feasibility and superiority of the proposed method compared with the thetraditional method.

关 键 词：时分极化测量 多普勒频移 正负斜率线性调频信号 极化散射矩阵 

分 类 号：TN957.51[电子电信—信号与信息处理]