高重频脉冲干扰对GPS接收机前端的干扰机理分析  

Analysis on the interference mechanism of high repetition frequency pulse jamming GPS receiver front-end

作　　者：王统刚 彭世蕤[1] 王广学[1] WANG Tonggang;PENG Shirui;WANG Guangxue(Air Force Early Warning Academy,Wuhan 430019,China)

机构地区：[1]空军预警学院,武汉430019

出　　处：《空军预警学院学报》2021年第4期248-253,共6页Journal of Air Force Early Warning Academy

摘　　要：为更好地对GPS接收机实施压制式干扰,从高重频脉冲对典型GPS接收机前端作用的角度,分析了非线性失真模型和不同条件下参数对干扰效果的影响,并进行了仿真.理论分析和仿真结果表明,当干扰的平均功率一定时,脉冲宽度越小,脉冲重复频率越小,干扰效果越好;当干扰的峰值功率一定时,脉冲宽度越大,脉冲重复频率越小,干扰效果越好;当落入接收机的干扰功率超过线性器件的输入1 dB压缩点,即产生非线性失真时,前端的信干噪比会大幅降低,干扰效果更佳.In order to better implement the oppressive jamming to GPS receiver,from the perspective of the effect of high repetition frequency pulse on the front-end of typical GPS receiver,this paper analyzes and simu-lates the influence of nonlinear distortion model and parameters under different conditions on jamming effect.The-oretical analysis and simulation results show that when the average power of interference is constant,the smaller the pulse width is,the smaller the pulse repetition frequency(PRF)is,and the better the jamming effect is;that when the peak power of interference is constant,the larger the pulse width is,the smaller the PRF is,and the bet-ter the jamming effect is;and that when the interference power entering the receiver exceeds the 1 dB compression point of the linear device input,that is,the time when nonlinear distortion occurs,the signal to interference and noise ratio of the front-end will be greatly reduced;the interference effect will be better.

关 键 词：GPS接收机 高重频脉冲 干扰机理 非线性失真 

分 类 号：TN972[电子电信—信号与信息处理]