导航信号模拟器上位机软件设计与实现

Design and Implementation of Upper Computer Software for Navigation Signal Simulators

卫星导航信号模拟器可以模拟产生各种动态环境下接收机所接收到的导航卫星信号。为接收机的调试和测试提供仿真信号源。完整的导航信号模拟器由上位机软件、中频信号产生、射频前端电路三个单元组成。文中对信号模拟器的上位机软件单元进行详细的分析,给出软件总体流程图,阐述主要模块的功能及其实现方法,包括人机交互界面、导航电文生成模块、载体运动轨迹计算模块、卫星位置计算模块和等效伪距误差计算模块。通过与商用(?)收机联试,验证了软件设计正确可行。

Satellite navigation signal simulators can generate satellite signals received by the receivers on various dynamic envi- ronments,which provide the signal source for the receiver debugging and test.The whole navigation signal simulator is composed of three units:the upper computer software,the intermediate frequency signal unit and the radio frequency front.This paper analyzes deeply the upper computer software employed by the simulator,presents the whole flow charts as well as the main modules,inch- ding man-machine interface,navigation message generation,carrier trace computation,satellite position computation and equiva- lent pseudorange error simulation.The functions and implementations of the modules are also introduced.The software is verified by a commercial receiver successfully.