一种基于GPS载波跟踪环的窄带干扰性能优化

Performance optimization of narrowband interference based on GPS carrier tracking loop

针对全球定位系统(GPS)卫星信号具有随机性及干扰工程实现成本的问题,讨论了窄带干扰性能优化问题。关于如何抵消卫星信号随机性问题,仿真分析了单频信号不同干扰位置分布与窄带线性调频(LFM)信号带宽设置对GPS接收机的干扰效果;关于如何降低干扰工程实现成本问题,采用了多个干扰代替单个干扰的方法进行实验分析。仿真结果表明,当采用最佳干扰位置或GPS信号带宽内均匀、随机分布等方法可一定程度消除卫星信号随机性带来的干扰不确定性;采用多信号代替单信号可相应地降低干扰所需总成本。

The performance optimization of narrowband interference is discussed in view of two problems:the randomness of Global Positioning System(GPS)satellite signal and the cost of interference engineering.Firstly,on how to offset the randomness of satellite signals,the interference effects of different interference positions of single-frequency signals and narrow band Linear Frequency Modulation(LFM)signal bandwidth settings on GPS receivers are simulated and analyzed.Secondly,on how to reduce the cost of interference engineering,the method of replacing single interference with multiple interference is used for experimental analysis.The simulation results show that the interference uncertainty caused by the randomness of satellite signals can be eliminated to a certain extent by using the optimal interference position or the uniform and random distribution in the GPS signal bandwidth,and the total cost of interference can be reduced by replacing single signal with multiple signals.