降噪多天线卫星导航欺骗干扰抑制方法

摘要

由于欺骗干扰比真实卫星导航信号功率稍大,意味着其功率远小于压制干扰,致使多天线卫星导航接收机的阵列接收环境发生改变,无法抑制欺骗干扰.该文提出了一种能有效改善阵列接收环境,恢复多天线卫星导航欺骗干扰抑制能力的方法.该方法通过降噪预处理提高阵列接收信号的信噪比和干噪比,再使用输出功率最小准则最优化权矢量,从而实现欺骗干扰抑制.理论分析和实验结果表明,该方法能够有效抑制欺骗干扰,而且阵列输出信干噪比较高,干扰抑制后接收机捕获性能不受干扰影响.%Since the power of spoofing is slightly larger than that of the real satellite navigation signal,and much less than the high-power interference,anti-spoofing cannot be realized based on conventional multi-antenna satellite navigation receiver due to the changes of array receiving environment.This paper presents a method which can improve the array receiving environment and recover the interference suppression ability of multi-antenna satellite navigation receiver.Firstly,improve SNR and interference to noise power ratio by denoiseing preprocessing from the array receive signal,and then employ the minimum the output power criteria to optimize the weight vector.Theoretical analysis and experimental results show that the method can effectively mitigate the spoofing,the array output signal to interference plus noise power ratio is higher,interference suppression after the receiver capture performance is not affected by interference.