海面环境半主动导引头抗多径方法研究  

A Study on Anti-multipath Method of Semi-active Seeker under Maritime Environment

作　　者：王宜进 童创明[1] WANG Yijin;TONG Chuangming(Air and Missile Defense College,Air Force Engineering University,Xi'an 710051,China)

机构地区：[1]空军工程大学防空反导学院

出　　处：《现代雷达》2019年第11期62-66,89,共6页Modern Radar

基　　金：国家自然科学基金资助项目(61372033)

摘　　要：多径干扰对防空导弹拦截掠海飞行超低空目标造成严重影响。引入制导雷达和导引头方向图以及修正复反射系数,建立半主动导引头修正"四路径"模型,采用基于物理光学法、等效电磁流法与Z-buffer消隐技术的混合算法,快速、准确地获取海面环境下超低空目标的多径散射,仿真分析了海面风速、雷达工作频率与目标类型对多径散射和信干比的影响。仿真结果表明:半主动体制下,采用VV极化方式,以7°左右的擦地角下视探测掠海飞行超低空目标,能有效抑制多径干扰。仿真结果对防空导弹的弹道设计具有借鉴意义。Multipath interference has a serious impact on the interception of the ultra-low altitude targets.Guidance radar radiation pattern,seeker radiation pattern and modified complex reflection coefficients are introduced to establish a correctional Four-Path model for semi-active seeker.By using the hybrid method of physical optics,equivalent electromagnetic current and Z-buffer shadowing algorithm,the multipath scattering of ultra-low altitude targets under maritime environment can be obtained quickly and accurately.The variation regulation of multipath scattering and signal-to-interference ratio with wind speed of maritime environment,radar carrier frequency and target category are simulated and analyzed.The simulation results reveal that the multipath interference can be effectively suppressed when semi-active seeker takes the VV polarization mode at approximately 7 degrees to detect the ultra-low altitude targets sweeping over the sea.The simulation results can be used for reference in trajectory design of air defense missile.

关 键 词：半主动导引头 多径干扰 修正“四路径”模型 海面环境 

分 类 号：TN957[电子电信—信号与信息处理]