共形阵列方位依赖幅相误差校正辅助阵元法  

Direction-dependent Gain-phase Errors Calibration for Conformal Array with Instrumental Sensor

作　　者：侯文林 胡月 谢吉鹏 HOU Wen-lin;HU Yue;XIE Ji-peng(Air Force Communication NCO Academy,Dalian 116600,China)

机构地区：[1]空军通信士官学校

出　　处：《火力与指挥控制》2019年第10期43-48,54,共7页Fire Control & Command Control

基　　金：国家自然科学基金资助项目(61172148)

摘　　要：针对共形阵列方位依赖幅相误差校正问题,给出了一种新的基于辅助阵元的自校正算法。对共形阵列接收快拍数据延时,构造满足旋转不变关系的时域子对,并计算子对的协方差矩阵和四阶累积量矩阵;基于旋转不变子空间原理完成对阵列流型和信源频率的估计;利用精确校正的辅助阵元和解线性方程组,实现对信源方位和方位依赖幅相误差的估计。所给算法适用于任意共形载体,普适性强,且无需参数搜索和配对,计算量小。Monte-Carlo仿真实验证明了所给算法的有效性。In order to solve the problem that direction -dependent gain and phase calibration of conformal array,a new self -calibration based on carry -on instrumental sensors is proposed here. Firstly, two sets of snapshots which satisfy rotation invariance can be contrasted via time-delayed. At the same time, the covariance matrix and four-order cumulant matrix were acquired. Then, based on the rotational invariance technique (ESPRIT ), the array steering matrix and sources frequency are estimated. At last, with the help of accurately-calibrated auxiliary array elements and solution of linear equations, the direct of arrive (DOA)and the direction-dependent gain-phase errors are estimated. The proposed method can be applied to arbitrary conformal array structure. This method has the characteristic of less calculation without the need of parameter searching and pairing. Monte-Carlo simulation results are provided to demonstrate the effectiveness of the method.

关 键 词：共形阵列 幅相误差 阵列校正 四阶累积量 频率估计 

分 类 号：TP911.7[自动化与计算机技术]