BDS／GPS／GLONASS／GALILEO 组合卫星导航系统仿真分析

摘要

全球卫星定位系统因其高精度、全天候等优点而被广泛应用，但是单一导航系统容易受环境及人为干扰，导致在区域精度和连续性上有较大问题。本文对组合导航系统进行仿真，组合中国BDS、美国GPS、俄罗斯GLONASS和欧盟的GALILEO四个全球卫星导航系统，利用仿真数据对目前GPS单一系统、当前不完整组合系统、未来完整组合系统在赣州地区的几何精度衰减因子（ GDOP）值、可见卫星数及导航精度进行对比分析。通过仿真结果可以发现，与单一的GPS系统相比，组合系统在可见卫星数、GDOP和导航精度上都有非常大的优势。%The Global satellite Positioning System is applied widely because of its advantages of high accuracy and all-weather operation .However ,a single satellite positioning system is more susceptible to environmental and human dis-turbance ,which causes significant problems about precision and continuity in region .In this paper ,an integrated naviga-tion system which includes the Chinese BDS ,the U.S.GPS,the Russian GLONASS and the EU’s GALILEO was applied to be simulated .And the simulated data was used to compare the current single GPS system ,the current incomplete inte-grated system and the future complete integrated system ’ s GDOP,the number of visible satellites and navigation accuracy in Ganzhou area .The simulation results reveal that the integrated navigation system is more advantage than the single GPS system in GDOP ,the number of visible satellites and navigation accuracy .