一般构型机载双站SAR的距离徙动特性分析  

Range Migration Properties Analyses for Airborne Bistatic SAR with General Configuration

作　　者：武拥军[1,2] 黄冶[2] 

机构地区：[1]脉冲功率激光技术国家重点实验室,合肥230037 [2]解放军电子工程学院信息系,合肥230037

出　　处：《电子与信息学报》2010年第12期3008-3012,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60671051);高等学校博士点专项科研基金(20060357004)资助课题

摘　　要：机载双站SAR的距离徙动由其几何结构和收、发载机的运动参数共同决定,在一般构型情况下具有了2维空变性。该文建立了一般构型机载双站SAR的空间几何模型,通过对双站斜距做Taylor级数展开,得到了双站SAR在时域的距离走动和距离弯曲表达式,并利用收、发雷达的斜距解耦合公式,推导出了距离弯曲的补偿条件。通过仿真,验证了距离徙动的变化特性及其徙动补偿后残余距离弯曲的非对称性变化特点。The range migration of the airborne bistatic SAR is determined jointly by its geometric configuration and the motion parameters of the transmitter and receiver, so it has two-dimensional space-variant properties under general configuration. The space geometric model of the airborne bistatic SAR for general configuration is firstly proposed. Via Taylor polynomial expansions to the bistatic range, the expressions of the range walk and range cure in time domain are derived. Making use of the uncoupling expressions both the transmitter range and the receiver range, the range cure compensation condition is derived. By simulations, the variant properties of the range migration and the asymmetry variant characters of the residual range cure after the migration compensation are validated.

关 键 词：机载双站SAR 一般构型 距离徙动 斜距耦合 距离徙动补偿 

分 类 号：TN958[电子电信—信号与信息处理]