一种GPS数字中频信号软件模拟器的设计

Design of a Software Simulator for Digitized IF GPS Signals

为了给GPS系统中基于C/A码的卫星捕获及跟踪算法提供信号源,以GPS卫星发送信号模型为基础,分析了GP2010的工作原理,采用Matlab/Simulink以软件的方式模拟了GP2010的工作过程,完成了一种数字中频GPS信号软件模拟器的设计,最后采用一种基于C/A码的捕获和跟踪算法对软件模拟器进行了验证。仿真结果表明:设计的软件模拟器可以给基于C/A码的卫星捕获和跟踪算法提供信号源,与常规GPS信号模拟器相比,所设计的软件模拟器结构简单,设计灵活并可扩展,易于使用。

In order to provide source signals to the satellite acquisition and tracking simulation based on the C/A codes,the models of GPS signals were introduced and the principle of GP2010 was analyzed.A software simulator of the IF GPS signals was implemented in Matlab/Simulink by simulating the working process of the GP2010.In the end,an acquisition and tracking method was adopted to validate the simulator and the result indicated that the simulator was able to provide source signals to the simulation.Compared to...