摘要
为克服互耦误差对阵列测向性能的严重影响,提出一种新的互耦自校正方法.首先分析非均匀双圈圆阵的结构特点,将互耦矩阵按照非均匀线阵内部互耦和非均匀线阵之间互耦的原则进行分块,将非均匀双圈圆阵的互耦问题转换到非均匀线阵的互耦问题.然后利用矩阵的加法运算法则,将分块后的矩阵分解成几个具有特殊特性的矩阵之和的形式,方便实现角度与互耦系数的解耦合,从而依次获得信号角度和互耦系数.实验仿真结果表明：提出的算法具有很强的角度分辨力,能较好估计互耦误差系数,可有效解决非均匀双圈圆阵的互耦问题.
In order to overcome the serious influence of mutual coupling error on the performance of array direction finding, a new mutual coupling self-correction method was proposed. Firstly,the structural characteristics of non-uniform dual circular array were analyzed.The mutual coupling matrix was divided into blocks according to the principle of mutual coupling inside non-uniform linear array and mutual coupling between non-uniform linear arrays.So,the problem of mutual coupling on non-uniform dual circular array was transformed to that on the non-uniform linear array.Secondly,by using the addition rule of matrix,the partitioned matrix was decomposed into the sum of several matrices with special characteristics,facilitating the decoupling of the signal angle and mutual coupling coefficients.The signal angle and mutual coupling coefficients were obtained in turn.From the simulation results,the proposed algorithm has a strong angular resolution and can well estimate the mutual coupling error coefficients,which can effectively solve the mutual coupling problem of non-uniform dual circular array.
作者
张佳佳
陈辉
Zhang Jiajia;Chen Hui(No.1 Department,Air Force Early Warning Academy,Wuhan 430019,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第7期104-110,共7页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(61501505)
关键词
非均匀阵列
双圈圆阵
波达方向估计
互耦
误差校正
non-uniform array
dual circular array
direction of arrival estimation
mutual coupling
error calibration
