阵列测向中的坐标变换方法及其快速实现  

A Coordinate Transformation Method for Direction Finding With the Antenna Array and Its Fast Implementation

作　　者：朱全江 王浩丞 沈志博 ZHU Quanjiang;WANG Haochen;SHEN Zhibo(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China)

机构地区：[1]电子信息控制重点实验室,成都610036

出　　处：《电子信息对抗技术》2021年第2期18-22,共5页Electronic Information Warfare Technology

摘　　要：针对测向系统在进行天线阵列校正过程中偏心距误差影响测向精度的问题,提出一种坐标变换方法,建立转台坐标系和天线坐标系之间的角度相互变换关系,用于修正偏心距误差。首先推导转台坐标系到天线坐标系的坐标变换公式,然后给出一种查表结合插值的方法实现天线坐标系到转台坐标系的坐标变换,其次基于曲面拟合给出一种实现坐标变换的快速方法,最后在暗室中利用单脉冲跟踪试验对上述坐标变换方法的正确性进行验证。Since the center of antenna array of a direction finding system deviates from the center of the test turntable in the array calibration,the accuracy of direction finding is affected.A coordinate transformation method is presented,the angle transformation relationship between the turntable and antenna coordinate system is established,and it is used to correct the eccentricity error.Firstly,the coordinate transformation formula from the turntable to the antenna coordinate system is deduced.Secondly,a solution method with table look-up and interpolation is given to realize a coordinate transformation from the antenna to the turntable coordinate system.Based on surface fitting,a fast implementation of the coordinate transformation method is presented.Finally,the correctness of the above method is verified by a monopulse tracking experiment in an anechoic chamber.

关 键 词：测向 阵列校正 坐标变换 曲面拟合 

分 类 号：TN971.3[电子电信—信号与信息处理]