摘要
针对旋转单天线测角问题,提出一种基于天线方向图模式滤波的解析估计方法。通过单天线旋转到不同观测角度接收目标信号并进行功率测量,然后按照一定的权系数对功率估计值加权求和,实现对天线方向图模式的滤波,转化为可对角度解析估计的模型。相对于传统比幅测角只利用主瓣/主波束信息,这种方法充分利用了天线方向图信息。研究了加权因子的选择方法,推导了理论测角精度以及无模糊测角范围。理论和仿真分析表明,该方法测角精度优于传统比幅测角方法。
Estimation of direction of arrival is addressed using single rotational antenna.Based on filtering of antenna pattern mode,an algebraic method is proposed.Firstly,a train of power measurements are determined when antenna is rotated to different observing angle.By summing up the measurements with specific weighted coefficients,the problem can be transformed into a phase estimation problem and an algebraic solution can be derived.Compared to conventional amplitude-comparison method,the proposed approach exploits the complete antenna pattern rather the main lobe/main beam.It is investigated that how to determinate the weighted coefficients.Theoretical error and non-ambiguity range of DOA are also induced.Both theoretical and simulation results are presented to prove the validity and demonstrate that the proposed method can obtain high precise estimation.
作者
朱晓丹
裴泽霖
王克让
陈卓
朱伟强
Zhu Xiaodan;Pei Zelin;Wang Kerang;Chen Zhuo;Zhu Weiqiang(No.8511 Research Institute of CASIC,Nanjing 210007,Jiangsu,China;Beijing Institute of Remote Sensing Information,Beijing 100192,China)
出处
《航天电子对抗》
2018年第6期11-16,共6页
Aerospace Electronic Warfare
关键词
测向
旋转单天线
模式滤波
direction finding
single spinning antenna
mode filtering
