一种高精度机扫被动超视距雷达测向方法  

A high-precision direction-finding method for mechanically scanned passive OTH radar

作　　者：岳帅英[1] 付林[1] 顾毅君[1] 

机构地区：[1]中国船舶重工集团公司第七二四研究所,南京211153

出　　处：《雷达与对抗》2017年第2期1-4,22,共5页Radar & ECM

摘　　要：将最小方差估计法应用到机扫被动超视距雷达测向中,在特定应用条件下提高了测向精度。分析了被动截获信号的脉冲能量-空间分布特征,仿真研究了该方法的测向精度对天线调制、截获次数的依赖关系。仿真结果表明,针对低频段、低速运动的海上辐射源目标,采用最小方差估计法测向可获得比现有方法更高的测向精度。实验验证了其工程适用性。The minimum variance estimation is applied in the direction finding of the mechanically scanned passive OTH radar to improve the direction-finding precision on the specific application con-ditions. The characteristics of the pulse energy-spatial distribution of the passive intercept signals are analyzed, and the impacts of the antenna modulation and the interception times on the direction-finding precision are discussed via the simulation. The simulation results indicate that the new meth-od is superior to the conventional methods in direction-finding precision for slow moving and low fre-quency surface targets. Finally, the test results verify that the method is feasible in practical engi-neering application.

关 键 词：被动超视距雷达 测向精度 最小方差估计 天线调制 

分 类 号：TN953.3[电子电信—信号与信息处理]