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A-GNSS是利用辅助信息辅助全球卫星导航系统定位的技术,该技术对于弱信号下用户导航定位非常重要。文中介绍了A-GNSS辅助导航基本原理,对典型的A-GNSS系统中的AGPS的组成及工作模式进行了阐述,并对A-GNSS的优缺点进行了分析。
A-GNSS is a technique that uses auxiliary information to assist in the positioning of global navigation satellite systems. This technique is very important for user navigation and positioning under weak signals. This paper introduces the basic principles of A-GNSS assisted navigation, describes the composition and working mode of AGPS in a typical A-GNSS system, and analyzes the advantages and disadvantages of A-GNSS.