iGPS导航技术的探索分析研究

Exploration and Analysis of iGPS Navigation Technology

本文分析了iGPS系统在导航应用及GPS增强方面的特征和优点。通过对iGPS系统构架、时间同步、导航终端的多普勒定位算法等关键技术的分析,从以下三个方面总结了iGPS对低轨星导航系统建设的借鉴意义:在系统构架设计方面减少系统对地面站点依赖增加系统灵活自主性运行能力;在工作体制方面,采用自主信号播发和中高轨卫星导航增强信号的转发,增加系统的抗干扰能力;导航终端可采用多普勒测量定位,减少对可见星数量约束。

The features and advantages of iGPS system applied in navigation and GPS augmentation were analyzed in this paper.Three conclusions were obtained by analyzing the iGPS system architecture,time synchronization and Doppler positioning solution.Firstly,reduce the dependence of the ground site to increase the flexibility of the system architecture.Then,in the work system,the independent signal can be used broadcast or the high orbit satellite augmented signals can be transmitted to increase the anti-jamming capability of the system.Finally,navigation terminals can use Doppler positioning to reduce the number of visible satellites.