无线电工程

GNSS电文分析软件将成为GNSS导航电文设计与分析评估的有效支持工具。介绍了一种能够展示各导航系统(GPS、Calileo、Glonass和Compass)现有导航电文的结构与参数、支持用户自定义配置新的导航电文以及对电文进行分析评估的软件,该软件以VC++为开发环境在PC平台上实现。讨论了GNSS电文软件的总体框架设计,阐述了GNSS电文展示以及用户自定义配置电文等设计方法,给出了与GNSS电文设计相关的首次定位时间、解调门限与精度等导航用户性能的分析结果。分析结果与对应的理论分析结果相符,表明该软件具备GNSS电文性能分析的能力。

The GNSS(Global Navigation Satellite Systems) message analysis software is implemented to provide an effective tool for the design and analysis of GNSS messages. Based on the VC + + software development environment and the PC platform,the software can display all the existing navigation messages,support users to design their own navigation messages,and provide the evaluation results for the above navigation messages. Firstly,the functional framework of this software is presented in this paper. In addition,some design issues are described such as display of the message structures and parameters,configuration of user- defined navigation messages,etc. Finally,the analysis results of user performances are given,such as Time To First Fix(TTFF),threshold of data demodulation and positioning accuracy. The above results accord with the corresponding theoretic analysis,which verifies the design of this message analysis software.