INS辅助GNSS高动态捕获跟踪技术研究  

INS-aided High Dynamic GNSS Rapid Acquisition and Stable Tracking

作　　者：马国驹[1] 蔚保国[1] 贾瑞才[1] 智奇楠[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2016年第2期23-26,共4页Radio Engineering

基　　金：国家高技术研究发展计划("863"计划)基金资助项目(2015AA124001;2013AA12A206)

摘　　要：在高动态的环境下,由于载体的运动速度及加速度非常大,卫星与载体之间的相对Dopple很大,超出了常规全球卫星导航(GNSS)收机的捕获搜索范围与跟踪门限,因此会造成搜索不到卫星或失锁。针对这一问题开展了利用惯导测量系统(INS)辅助GNSS接收机捕获与跟踪技术研究,GNSS接收机利用INS提供载体的速度、加速度和位置参数,预测载体的多普勒(Dopple)频移,结合接收机的星历及环路信息,共同调节环路中的NCO,及时重新设定环路搜索中心频率,从而解决了高动态引起大的Dopple频移这一问题。仿真结果表明,相比传统的接收机,通过INS辅助的GNSS接收机可以在超高动态模拟环境下,加速度100 g和速度为4 000 m/s时仍可以快速捕获及稳定跟踪信号。In high dynamic environment,due to the high speed and acceleration of carrier,the relative Doppler between satellite and carrier is so great that it is beyond the conventional GNSS acquisition searching scope and tracking limit,and results in losing lock.To solve this problem,it is proposed in this paper to use INS-aided GNSS receiver acquisition and tracking. GNSS receiver uses the motion speed,acceleration and location parameters provided by INS plus the information of satellite and loop to calculate the carrier＇s Doppler frequency,which adjusts the NCO and resets the center searching frequency,thus the Doppler shift caused by high dynamic is solved. Simulation result indicates that compared with traditional receiver,the INS-aided receiver can realize rapid acquisition and steady tracking of signal in ultrahigh dynamic environment with acceleration of 100 g and speed of 4000 m / s.

关 键 词：高动态环境 信号捕获 INS辅助 稳定跟踪 载波多普勒 

分 类 号：TN967[电子电信—信号与信息处理]