一种高动态导航卫星信号的精确跟踪方法  

An accurate tracking method for high dynamic navigation satellite signals

作　　者：易炯 陈倩[2] YI Jiong;CHEN Qian(Hwa CreateTechnology Corporation Ltd.,Beijing 100193,China;China Electronics Standardization Institute,Beijing 100007,China)

机构地区：[1]北京华力创通科技股份有限公司,北京100193 [2]中国电子技术标准化研究院,北京100007

出　　处：《导航定位学报》2019年第1期65-71,共7页Journal of Navigation and Positioning

摘　　要：针对导航接收机的动态性能、跟踪灵敏度和观测量精度指标之间易相互矛盾,在接收机设计时需根据应用场合进行性能指标取舍的问题,提出一种载波环N ms累积1ms更新、通过硬件逻辑实现载波环辅助码环的跟踪方法,形成一套完整的高动态接收机跟踪环路,并在较弱信号的高动态模拟环境下对接收机的定位精度进行评估。实验结果表明,基于该方法进行环路4ms累积1ms更新时,在信号强度—133dBm、加速度490m/s2、加加速度294m/s3的动态环境下能正常定位,并实现水平10、高程15m的定位精度。Aiming at the problem that it is liable to be contradictory for navigation receiver between the indictors of dynamic performance,tracking sensitivity and observation accuracy,thus it is necessary to select the proper indictor according to the application situation during the design of receiver,the paper proposed a tracking method:N ms accumulation and 1 ms update were employed in carrier tracking loop,and the code tracking loop was assisted by carrier tracking loop based on logic hardware;then a full receiver tracking loop with high dynamic was realized;finally,the positioning accuracy of the receiver under a simulation environment with high dynamic of weak signals was evaluated.Result showed that the proposed method could help perform the positioning in the loop accumulation of 4 ms and update of 1 ms with the accuracy of horizontal 10 m and vertical 15 m under the dynamic environment of-133 dBm,490 m/s^2 acceleration and 294 m/s^3 jerk.

关 键 词：高动态 跟踪 载波环辅助码环 码数控振荡器 载波数控振荡器 

分 类 号：P228[天文地球—大地测量学与测量工程]