一种低轨双星窄带信号定位方法  

A Narrowband Signal Localization Method for Low Orbit Dual Satellites

作　　者：张宇阳[1] 巢捷频[1] ZHANG Yuyang;CHAO Jiepin(Southwest China Institute of Electronic Technology,Chengdu 610036,China)

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《电讯技术》2021年第4期414-417,共4页Telecommunication Engineering

摘　　要：针对低轨双星系统对窄带辐射源无源定位的应用场景,基于双星观测到的辐射源到达频率差,提出了一种多次频差测量联合估计辐射源位置的方法。详细描述了算法原理、算法处理步骤,并通过计算机仿真分析了信号频率、频差测量误差、观测时长等因素对定位精度的影响。仿真分析表明,在观测时间大于20 s、频差测量精度0.1 Hz时,该方法定位精度优于1.5 km,具有较强的工程应用价值。For the purpose of estimating location of narrowband emitter in dual satellites system,a solution is presented for emitter location estimation using multiple frequency-difference-of-arrival(FDOA)observed by the dual satellites.Principles and process steps of the solution are described.The influence of signal frequency,FDOA measurement error and time of observing on location accuracy is analyzed through computer simulation.Simulation results show that the location accuracy is about 1.5 km when time of observing is 20 s and FDOA measurement error is 0.1 Hz.The method has significative value of engineering application.

关 键 词：双星系统 无源定位 窄带信号 到达频率差 

分 类 号：TN971[电子电信—信号与信息处理]