GPS最优压制式干扰信号研究

Study on Optimal Jamming Signal of GPS System

摘要:

针对GPS最优干扰信号评估方法欠缺的问题,提出了利用接收机误码率判断最优干扰信号的方法;通过对卫星导航接收机工作原理的研究,建立了卫星导航接收机模型；通过接收机不同模块对导航信号处理过程的研究,建立了基于中频信号的误码率模型;利用仿真工具模拟不同干扰信号,研究不同干扰环境下接收机的误码率;通过改变干扰信号功率得到误码率与干信比的关系曲线,比较不同干扰信号同干信比下接收机的误码率,得到最优干扰信号;通过实验验证,在接收机干信比允许范围内,相同干扰信号功率下,伪码相关干扰信号干扰效果最优,为卫星导航信号干扰设备的研发及设计提供了依据。

Abstract:

Due to the problem of the lack of evaluation method for GPS optimal jamming signal,the method of judging the optimal jamming signal by using error rate is proposed. A satellite navigation receiver model is established through the research on the working principle of the satellite navigation receiver,and a bit error rate model based on the intermediate frequency signal is established via the research on the processing of navigation signal by the different modules of the receiver. The error rate of the receiver under different interference conditions is studied take the advantage of the simulation of different interference signals using simulation tools. The relationship curve between the error rate and the ISR(InterferenceSignal Ratio) is obtained by changing the power of the interference signal. Then the optimal jamming signal is obtained by comparing the error rate under the different interference signals in the same ISR. Through the experimental verification,under the circumstances of the same interference signal power,the PN related code signal effect is optimal when in the receiver ISR range ,which provides a basis for the development and design of the satellite navigation signal jamming equipment.