相控阵卫星跟踪系统搜索/捕获仿真研究  

Simulation Research on Search/Capture Process of Phased Array Satellite Tracking System

作　　者：向晓萍[1] 李朝海[1] 黄宇声[1] 姜雯献 

机构地区：[1]电子科技大学电子工程学院,四川成都611731

出　　处：《雷达科学与技术》2015年第5期535-542,共8页Radar Science and Technology

基　　金：国家自然科学基金(No.61101173);中央高校基本科研业务费资助项目(No.ZYGX2010J020)

摘　　要：为了实现针对高速移动载体平台稳定的相控阵天线对卫星系统的自动跟踪。对二维相控阵天线自跟踪系统方案设计进行了说明,考虑到载体平台提供的引导信息与卫星真实方向之间存在一定偏差,使得系统不能直接进入自跟踪过程,需要首先根据引导信息对卫星信号进行搜索捕获,给出搜索过程的波位排列和能量检测理论以判断接收到信号是否是有效信号,捕获中采用单脉冲和差波束比幅测角和α-β滤波作为捕获过程跟踪滤波方案,并通过仿真分析了信噪比、波束指向误差对捕获过程收敛性能的影响。整个算法简易稳定,可以运用到高速移动平台的自跟踪系统,保证自跟踪的准确性。According to the demand of stable automatic tracking satellite from high-speed motion plat- form, the design of a two-dimensional phased array tracking system is introduced. Considering the deviations between the guide information and real direction vector of satellite which make the system can＇t enter the au- to-tracking process directly, the search and acquisition processes need to be analysed at first. In the search process, the beam position sequence and the energy detection method is used to judge whether the received signal is valid. In the capture process, the ∑-△ amplitude-comparison monopulse technology and α-β filter are chosen as the tracking filtering strategy. Besides, the effects on the convergence performance of some imper- fect factors, such as SNR and beam pointing error, are analyzed through simulation. The algorithm is simple and stable, which can be applied to high-speed mobile platform to ensure the auto-tracking accuracy.

关 键 词：相控阵 角度跟踪 搜索/捕获 能量检测 和差波束比幅测角 

分 类 号：TN958.92[电子电信—信号与信息处理]