基于虚拟基线的宽带被动导引头测向方法  

Direction Finding Method of Wideband Passive Radar Seeker Based on Virtual Baseline

作　　者：曲志昱[1] 司锡才[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《弹箭与制导学报》2007年第4期92-95,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：被动雷达导引头中多基线相位干涉仪在宽带测向时存在角度模糊,针对这一问题,文中提出了一种基于虚拟短基线依次解模糊的相位干涉仪测向方法,该方法既不需要最短基线长度小于入射波的半波长,也不需要基线的尺寸满足参差关系,解决了增大最大无模糊角度与测向带宽之间的矛盾,易于工程实现。详细讨论了虚拟短基线正确解模糊的信噪比要求和通道相位一致性条件,仿真结果表明了理论分析的正确性。In wideband passive radar seeker（PRS） system, multl-baseline phase interferometer has angle ambiguity in DOA estimation. In order to solve this problem, an ordinal ambiguity resolution method based on virtual short baseline is proposed. It solves the contradiction between the maximal unambiguous angle and direction finding bandwidth. The shortest baseline can be longer than the half-wavelength of the incident signal, and the length of the baselines can not be stagger. The method is very practical. The SNR limitation and channel phase consistency condition of solving ambiguity correctly is discussed in detail. The correctness of theoretic analysis is effectively demonstrated by computer simulation.

关 键 词：被动雷达导引头 角度模糊 虚拟短基线 通道相位一致性 

分 类 号：TJ765.335[兵器科学与技术—武器系统与运用工程]