【摘要】 针对目前导航定位系统采用的超帧、帧、子帧的固定格式带来的灵活性和效率上的不足,提出了一种未来导航电文结构编排的改进方法。该方法在现有导航电文编排格式的基础上,通过编程搭建电文可配置模块,实现用户界面仿真,展现几种常见电文结构,并对这些结构特点进行分析。该方法采用基于帧结构与数据块结构相结合的编排方式和奇偶页面交叉播发的播发方式,充分利用了不同子帧播发的历书数据不同的特点,减少冗余数据的同时缩短了用户收齐所有历书数据的时间,满足数据内容扩充的灵活性和播发的随机性。结果表明:改进的帧结构能克服固定格式的灵活性和效率问题,使模拟器应该能够支持导航电文格式设计研究与验证,北斗系统导航电文的结构设计可考虑采用该编排方法,以便支持以后接口控制文件的编制和修订。更多还原

【Abstract】 At present,navigation positioning system uses fixed format of super-frame,frame and subframe,and it brings shortcomings of flexibility and efficiency.Aiming at these problems,this paper put forward an improved method for the future navigation message structure arrangement.The method based on the existing navigation message format,through programming to build configurable modules,realized the user interface simulation,and display some common data structure,then these structural features were analyzed.The method adopted the layout method based on the combination of frame structure and data block structure and the broadcast mode of parity page broadcast crossly.It makes full use of the characteristics of different subframe broadcast ephemeris data is different,reduces the redundant data and shorten the time of users collecting basic navigation data,and meet the expansion of flexibility and randomness of broadcast in data content.The results show that the improved frame structure can overcome the flexibility and efficiency problem of fixed format,and make the simulator to support research and verify the navigation message format,so the BDS navigation message may consider using this layout method to support the compilation and revision of subsequent interface control document.更多还原