高频地波舰载超视距雷达中的空时处理  

Space Time Processing for High Frequency Surface Wave Shipborne Over the Horizon Radar

作　　者：谢俊好[1] 许荣庆[1] 袁业术[1] 刘永坦[1] 

机构地区：[1]哈尔滨工业大学电子工程技术研究所

出　　处：《系统工程与电子技术》1998年第2期30-36,共7页Systems Engineering and Electronics

基　　金：国防科工委"九五"重点攻关项目

摘　　要：由于目标信号淹没在强大的、展宽的一阶Ｂｒａｇｇ谱中，高频地波舰载超视距雷达的目标信号检测变得很困难。基于一阶Ｂｒａｇｇ杂波的时空二维耦合特性，本文将天线相位中心偏置（ＤＰＣＡ）技术予以推广并应用于一阶海杂波的抑制。此外，考虑到实际平台运动速度的波动，本文又提出通过空域插值获得等效阵元信号进行空时二维滤波的方法。计算机仿真结果表明：当平台运动速度沿理想值波动较小时，可通过空域插值获得较好的杂波抑制效果。进一步的研究将集中在插值方法的选取及时域插值的研究。It is difficult to detect a target emerged inthe broadened 1st Bragg sea clutter in HF SWOTHR.On basis of the coupling property of 1st Bragg sea clutter,DPCA is extended to attenuate it in this paper.Moreover,interpolation in spatial domain is proposed to retrieve signal for space time processing in consideration of the vibration of platform motion.Simulation results show that the method can remarkably attenuate 1st Bragg sea clutter when platform velocity slightly vibrates over the theoretical value.The further research will focus on the choice of interpolation method as well as interpolation in time domain. [WT5”HZ〗

关 键 词：超视距雷达 杂波抑制 插值法 雷达 

分 类 号：TN958.93[电子电信—信号与信息处理]