中文摘要：

卫星导航系统受到越来越多国家的重视,而自主导航无疑是其中的核心技术之一。基于24/3/2构型的MEOWalker星座,分析了伪码测距技术的原理与局限性,在此基础上探讨了载波相位测距技术,以及其中周跳的检测与修复、整周模糊度求解问题,结合星间链路特点提出了两种相应的解决思路,即载波相位平滑伪码测距技术、双频载波相位联合伪码测距技术,对研究具有自主导航功能的全球导航系统具有一定意义

英文摘要：

More and more countries are attaching importance to satellite navigation system,and autonomous navigation is one of the key technologies.Based on 24/3/2 MEO Walker satellite system,this paper analyzes the theory and shortages of PRN ranging,carrier phase ranging along with relevant detection and recovery of cycle-slip.Ambiguity resolution is also introduced.In addition,carrier-phase smoothing PRN ranging and double frequency ambiguity resolution are specifically introduced,which would be meaningful for development of global navigation satellite system