基于北斗导航信号的高轨卫星定位性能分析  

Research on positioning performance of high orbit satellite based on Beidou navigation signal

作　　者：姜慧[1] 王亚芳[1] 王垚 李岩[1] 

机构地区：[1]河北科技大学信息科学与工程学院 [2]河北省卫星导航技术与装备工程技术研究中心,河北石家庄050081

出　　处：《信息通信》2017年第9期71-74,共4页Information & Communications

摘　　要：随着我国自行研制和发展的北斗卫星导航系统的日益成熟,利用北斗导航系统对高轨卫星定位正逐渐成为研究的热点。对基于北斗导航信号的高轨卫星定轨性能展开研究,首先对高轨卫星建立动力学模型,然后对北斗信号传播链路建模,对导航卫星的接收功率、可见性、定位精度因子(DOP值)、多普勒性能建立相应的模型并开展仿真研究。仿真结果表明:高轨卫星GEO、HEO星载接收机接收功率分别为-174d BW和-180d BW时,可见星数至少4颗,满足导航定位需求;GEO的平均几何精度因子(GDOP)的均值为31.9535,HEO的平均几何精度因子(GDOP)为25.2012;GEO的多普勒频移范围约为8k HZ,HEO的多普勒频移范围约为31k HZ。该研究为后续弱信号捕获跟踪提供了理论依据和数据支撑。With the development of Beidou satellite navigation system which is developed and developed by our country, the use of Beidou navigation system to locate high earth orbit satellites is becoming a hot topic. The high orbit satellite orbit Beidou navigation signal performance research based on the establishment of high orbit satellite dynamics model, then modeling of Beidou signal transmission link, receiving power factor, visibility, the positioning accuracy of the navigation satellite（DOP）, the performance of Doppler model and carry out simulation research. The simulation results show that the high orbit satellite GEO and HEO satellite receiver power were-174 d BW and-180 d BW, the number of visible stars at least 4 stars, to meet the needs of navigation; the average geometric accuracy factor GEO（GDOP） value is 31.9535, the average geometric accuracy factor HEO（GDOP） 25.2012; Doppler frequency GEO shift range is about ±8k HZ, HEO of the Doppler frequency shift range is about±31k HZ. The research provides the theoretical basis and data support for the following weak signal acquisition and tracking.

关 键 词：北斗导航 高轨卫星 精度定位 可见性 多普勒频移 

分 类 号：V474.2[航空宇航科学与技术—飞行器设计]