摘要
为了改善米波雷达的低空性能并减少波瓣分裂的影响,实际的米波雷达系统天线往往采用倾斜布阵方式,然而工程上通常将倾斜阵列近似成垂直阵列,在此近似条件下利用基于高度分集的测高方法。这样近似后,使得波程差只与目标的俯仰角有关,而实际的波程差是目标方位角和俯仰角的二维函数。提出了在倾斜阵列下的高度分集的测高方法,新的测高方法与目标方位角有关,与实际情况更加接近,通过对接收信号精确建模以提高测高精度,计算机仿真结果表明了该方法的优越性。
In order to improve the performance of the VHF radar in low angle tracking and reduce the affect of the beam split, the oblique planar array is used in VHF radar systems actually. However, the oblique array is always approximated by the vertical array in practice. Under the approximation, the measurement of altitude diversity is applied. As a result, the wave distance, which is the function of azimuth and elevation in fact, is re- lated to the elevation angle only. This paper proposes the altitude measurement based on the oblique array in VHF radar by the method of altitude diversity. The new method is close to the practical situation by the preei sion model. The simulation shows the validity of the new method.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第10期2355-2358,共4页
Systems Engineering and Electronics
基金
国防科技重点实验室基金(9140C0105010704)资助课题
关键词
米波雷达
测高
多径
高度分集
VHF radar
altitude measurement
multipath
altitude diversity
