天空双基地预警雷达目标回波建模及徙动特性分析  

Modeling of target echo and analysis of migration peculiarity for space-air based bistatic early warning radar

作　　者：王万田 袁俊泉[1] 饶翚[1] 王悦[1] WANG Wantian;YUAN Junquan;RAO Hui;WANG Yue(Air Force EarlyWarning Academy,Wuhan 430019)

机构地区：[1]空军预警学院,武汉430019

出　　处：《空军预警学院学报》2017年第4期235-242,共8页Journal of Air Force Early Warning Academy

基　　金：学院科研创新基金重大基础研究专项课题(ZDJC0102)

摘　　要：为了开展天空双基地预警雷达目标检测技术研究,首先在建立空间几何模型的基础上,分析了目标运动特性、回波脉冲宽度及其对脉冲压缩性能的影响,进而建立了运动目标回波模型;然后研究了高速运动目标的距离徙动特性;最后对目标径向速度、径向加速度与天基发射平台轨道倾角、初始轨道幅角、目标速度的变化关系以及距离徙动对相参积累性能的影响进行了仿真.仿真结果表明,天基发射平台高速运转、地球自转以及目标运动使得回波包络峰值跨距离徙动严重,积累能量分散在多个距离单元内,降低了目标的检测性能.In order to carry out studies on the technology of target detection in space-air based bistatic early warning radar,this paper firstly on the basis of the establishment of spatial geometric model,analyzes target motion peculiarity,echo pulse width and its influence on pulse compression performance,and establishes the target echo model.And then the paper studies the range migration peculiarity of high-velocity target.Finally simulation is done on the changes in the relationship between radial velocity,radial accelerated velocity and the angle of satellite orbit,argument of perigee of satellite orbit,target initial velocity,and the range migration’s impact on the coherent integration performance.Simulation result shows that high velocity of satellite,rotation of the earth and target motion cause the migration of the target echo peak envelope through resolution cell to be so serious as to disperse the energy accumulation in many range cells and reduce the target detection performance.

关 键 词：天空双基地预警雷达 目标运动特性 回波模型 距离徙动 相参积累 

分 类 号：TN959[电子电信—信号与信息处理]