摘要
以往的测高算法假设雷达是垂直线性阵列模型,而实际的米波雷达采用倾斜面阵的布阵方式,此种布阵方式会带来方位和俯仰的耦合效应.为了减少实际布阵下同时存在多径传播与耦合的影响,基于新时空级联最大似然算法,将原先的一维结果推广以适用于倾斜面阵下的二维测角,既避免了多径信号的影响,又通过二维搜索克服了耦合效应,测高均方根误差小于距离的1%.计算机仿真表明了该算法的有效性.
The algorithms available assume the vertical linear form array model, but the oblique planar array, which brings the mutual coupling between azimuth and elevation, is used in the VHF radar system in actual application. In order to decrease the effect of multipath propagation and mutual couplings under the oblique planar array, the temporal-spatial sequential Maximum Likelihood algorithm is extended to estimate the two-dimension angle for the oblique planar array, which not only avoids the effect of the multipath, but also decreases the mutual coupling by two-dimension scanning and the altitude root mean square error is less than 1% of the range. Simulation shows the effectiveness of the method.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2009年第1期43-47,共5页
Journal of Xidian University
基金
国家部委重点实验室基金资助(9140C0105010704)
关键词
阵列
测高
多径传播
耦合
array
altitude measurement
multipath propagation
couplings
