摘要
北斗导航系统比GPS、GLONASS等其他导航系统多了地球同步轨道(GEO)卫星,GEO卫星信号的调制方式和编码格式和非GEO卫星有着很大的区别,有助于增强导航与定位。文中通过多个GEO和非GEO卫星组合的测试场景,重点仿真分析了在选定的定位精度因子下GEO卫星和非GEO卫星对北斗终端定位精度的影响。结果表明GEO卫星有助于提高定位精度,尤其是当参与定位的卫星数较少时,GEO卫星参与定位可提高20%以上的定位精度。
Beidou navigation system has GEO satellites when compared with other navigation systems, such as GPS and GLONASS navigation system. GEO satellites＇ signal modulation and format are different from non-GEO satellites＇ signal modulation and format. These different enhance the ability of navigation and positioning. In the paper, multiple GEO and non-GEO combination test scenarios are set to simulate and analysis GEO and non-GEO satellites＇ influence on the Beidou positioning accuracy under the selected positioning accuracy factor. The results show that GEO satellites help improve the positioning accuracy. Especially when there are a few number of acquired satellites, GEO satellites can increase more than 20% of the positioning precision.
出处
《信息技术》
2016年第1期6-9,共4页
Information Technology
基金
国家自然科学基金资助(61304225)
中国卫星导航系统管理办公室(北斗办)和上海市科学技术委员会联合资助(BDZX005)
国家863计划资助(2012AA12A209)
