相控阵卫星跟踪系统角度测量研究

Research on Angular Measurement of Phased Array Satellite Tracking System

运动平台相控阵卫星跟踪系统是一种高速运动目标实时跟踪系统,测角算法为系统的关键技术之一。结合相控阵卫星跟踪系统方案,重点研究了适用于相控阵卫星跟踪系统的测角算法,在单脉冲测角理论的基础上进行研究和改进,提出了一种基于子阵划分的互相关角度测量方法。该方法能有效地提高输出信号信噪比,并具有运算量小、测角精度高、适宜工程实现等特点,较好地解决了卫星跟踪系统中角度测量的工程需求问题。数值仿真分析了影响测角精度的若干因素,验证了算法的有效性。最后给出了保障测角精度的措施。

The moving platform phased array based satellite tracking system is a real-time tracking system for high-speed moving targets.The angle measurement algorithm is one of the key technologies of the system.By combining the system scheme,this paper considers the angle estimation problem,and resorting to the related theory of monopulse angle measurement,proposes a cross-correlation angle estimation method based on sub-array division.This proposed method is characterized by effective improvement of output signal-noise,low computational complexity,high angle measuring precision,and practical engineering implementation,thus well filling the engineering requirement of angle measurement in satellite tracking systems.Numerical simulations analyze the influence factors on the accuracy of angle measurement and validate the effectiveness of the proposed algorithm.Finally,the measures to guarantee the precision of angle estimation are provided.