GNSS兼容性软件设计与仿真分析

Design of GNSS Compatibility Software and Simulation Analysis

随着各国全球和区域卫星导航系统的建设或现代化升级,越来越多的信号占用拥挤的导航频段,卫星导航系统间的兼容性问题日益突出。在建立高精度的空间段、用户段、环境段与干扰模型的基础上,提出了一种GNSS兼容性分析的软件实现方法,给出了基于Matlab平台的GNSS兼容性软件的体系架构,详细描述了各主要模块的功能与实现方法。最后,仿真分析了Compass、GPS和Galileo三大导航系统在L1频段内的兼容性,得出GPS L1C/A信号是最主要的系统内干扰,最大为3.71dB,且GPS对其它系统的干扰均较大,约为2dB,Galileo对其它系统的干扰较小,不超过0.6dB。

With the building and the modem update of global or regional satellite navigation systems, more and more signals take the crowded radio navigation satellite system band. The compatibility problem has become prominent increasingly. On the basis of the establishment of the space section, user section and environment section in high accuracy, a software implementation about GNSS compatibility was offered. A Matlab based GNSS compatibility software architecture was given, and in which the modules were described in detail. Finally, the compatibility of Compass, GPS and Galileo system in L1 band was simulated. It offers that intrasystem interference about GPS L1C/A signal is the most important one, which is 3.71dB. Moreover, the intersystem interferences of GPS to other systems are all bigger, about 2dB. Meanwhile, the ones of Galileo to other systems are smaller, less than 0.6dB.