强干扰下GPS接收机性能仿真和分析(英文)

GPS Receiver Performance Simulation and Analysis Under Strong Interference

由于GPS接收机接收信号弱,使得接收机容易被干扰。为了分析干扰对GPS接收机的影响,开发了一个基于Matlab的软件仿真平台。该平台包括四个部分:用户界面、GPS信号仿真器、GPS软件接收机以及干扰信号发生器。接收机在受干扰信号的驱动下的输出量:伪距、载噪比、锁相环锁定值和定位误差,用于接收机的干扰性能分析。理论结果和实验结论相吻合表明该软件仿真平台可以用于干扰条件下接收机的性能分析。同传统的硬件仿真相比,软件信号仿真平台以较低的代价为研究者和开发人员的评估和测试提供更多的灵活性。所有的关键技术都采用Matlab语言的模块化编程。因此,该仿真平台适合该领域的初学者掌握GPS原理和研究者开发更先进的抗干扰算法。

Due to weak receiving power of Global Positioning System（GPS） signal,a GPS receiver is vulnerable to interference.In order to analysis interference effects on a GPS receiver,a software simulation platform built on Matlab has been developed by this research.It includes four basic elements：user interface,GPS signal simulator（intermediate frequency,IF）,civilian（C/A） software receiver and interference generator.The output values of the receiver driven by jammed GPS signals,such as pseudorange,carrier-noise density radio（C/No）,phase locked loop locked value and position error,are used to analyze interference effects.The close correspondence between theoretical result and experimental conclusion show that this simulation platform could be used to evaluate the performance of a GPS receiver under interference conditions.Compared with conventional hardware simulation,software simulation can provide researchers and developers with more evaluation and testing flexibility and low cost.All key techniques of this platform are modularized and coded with Matlab language.In this sense,this simulation platform is suit for new beginners of this field to understand GPS principles and for engineers to develop more advanced anti-jamming algorithm.