基于MWORKS的GNSS导航电文建模与仿真  

Modeling and Simulation of GNSS Navigation Messages Based on MWORKS

作　　者：刘正东 夏斐然 许承东[1] LIU Zhengdong;XIA Feiran;XU Chengdong(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学宇航学院,北京100081

出　　处：《软件导刊》2023年第10期11-18,F0003,共9页Software Guide

基　　金：国家自然科学基金项目(11972079)。

摘　　要：导航卫星信号的仿真系统可以模拟实际条件下多个卫星的信息,在接收机各项特性的测量方面起到了关键作用,降低了接收机的研制成本,提高了研制效率。导航电文是导航卫星定位系统的重要基础信息,其精度直接关系到定位系统的准确性。在此背景下,对4个GNSS导航电文的基本结构与内容进行研究,先后构建4个GNSS导航电文系统仿真模块,并通过国产软件MWORKS对各个系统的导航电文进行模拟,获取某一时段内播发的二进制电文信息,并将其译码得出的数据与原始参数进行比较,发现其误差数量级远小于原始参数,验证了电文编译的准确性。The simulation system for navigation satellite signals can simulate the information of multiple satellites under actual conditions,playing a key role in measuring various characteristics of the receiver,reducing the development cost of the receiver,and improving develop⁃ment efficiency.Navigation messages are important basic information for navigation satellite positioning systems,and their accuracy directly af⁃fects the accuracy of the positioning system.In this context,the basic structure and content of four GNSS navigation messages were studied,and four GNSS navigation message system simulation modules were constructed successively.The navigation messages of each system were simulated using domestic software MWORKS to obtain binary message information broadcasted during a certain period of time.The decoded da⁃ta was compared with the original parameters,and the error order of magnitude was much smaller than the original parameters,verified the ac⁃curacy of message compilation.

关 键 词：全球导航卫星系统 导航电文 编码模型 计算机仿真 MWORKS 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]