都市条件下GPS信号源发射机及多径信道仿真

Simulation of Signal Source and Channel of Multipath GPS Signal under Urban Environment

为了解决商业GPS信号源价格昂贵、功能单一、参数不可控的缺点,提出了根据无线通信系统基带等效模型应用SIMULINK和S函数建立GPS信号源及多径信道仿真环境。以都市三态模型代替陆地移动模型,更准确地模拟了都市环境中普遍存在的镜面反射和附近建筑物散射。因篇幅所限,本文仅讨论发射机与多路径信道仿真,在后续文章中将仿真接收机及分析链路计算,将作为后续篇另行发表。

For solving the weakness of commercial GPS signal simulator such as parameter uncontrollable,unitary function and costliness.A multipath signal simulator has been put forward base on wireless communication system lowpass equivalent model.Replacing Land Mobile Model with Urban Three State Fade Model more accurately emulate the specular reflections and diffractions from building nearby in the widespread.For the limitation of space,the simulation of receiver and the calculation of CNO should be introduced in later paper.