超宽带条件下运动目标的高分辨分析方法  

A High-Resolution Method for Motive Target in UWB

作　　者：王剑[1] 吴嗣亮[1] 侯舒娟[1] 

机构地区：[1]北京理工大学信息科学技术学院,北京100081

出　　处：《电子与信息学报》2007年第9期2090-2093,共4页Journal of Electronics & Information Technology

摘　　要：该文首先分析了在超宽带条件下静态雷达目标的频域响应特性,提出了一种更符合目标散射实际情况的高分辨分析参数化方法,该方法通过对目标回波进行ARMA模型状态空间近似,提取目标的散射极点来获得散射点的散射类型和距离信息。在目标存在运动时,目标的回波模型是由静态回波模型与一个含运动参数的多项式相位因子组成。据此,该文提出采用循环统计量的方法来进行速度估计,经过速度补偿消除运动影响后可获得超宽带条件下目标的散射极点的精确估计。仿真实验结果表明该方法对静止和运动目标都能够获得目标精确的一维距离信息和各散射点的散射机理类型,对于获取超宽带条件下目标高分辨分析是十分有效的。This paper firstly studies the characteristic of the UWB radar frequency response and presents a parameterized method to extract the poles of UWB still target. This method regards the high frequency echo as an ARMA model and poles of this ARMA model express the scattering type and range of the scatter. Secondly, according the actual situation, the motive target model of UWB radar is presented. This model is composed of a still model and a polynomial phase part which is caused by the motion of target. Based this character, a cyclostationary method can be used to estimate the motion parameters of the target. After the motive target model compensated by the estimated parameters, the eigenvalues can be extracted by the state space method. Simulation shows 1-D range and scattering mechanism can be correctly obtained and proves the validity of the method.

关 键 词：超宽带雷达 目标散射中心 参数估计 状态空间近似 循环统计量 

分 类 号：TN957.51[电子电信—信号与信息处理]