基于改进SPRT的机载欺骗式干扰检测方法

Detection method of airborne spoofing interference based on improved SPRT

针对传统机载GNSS欺骗式干扰检测方法在多星受欺骗、或伪距欺骗量较小时检测性能差的问题,提出一种基于改进SPRT的欺骗式干扰检测方法。利用惯性导航系统(INS)和测距机(DME)机载多源数据,构造欺骗检测量。基于Bayes参数估计理论,提出一种改进SPRT算法,利用欺骗检测量计算自适应补偿值,构成改进的欺骗检测统计量。利用改进的欺骗检测统计量进行欺骗式干扰检测,加快算法的检测速度。巡航阶段的仿真结果表明,在满足机载设备相关要求的同时,在多星受欺骗情况和伪距欺骗量较小情况下均具有较好的检测性能。

Aiming at the problem of poor detection performance of traditional airborne global navigation satellite system(GNSS)spoofing interference detection methods when multiple satellites are spoofed or the amount of pseudorange spoofing is small,a spoofing interference detection method based on improved sequential probability ratio test(SPRT)was proposed.The inertial navigation system(INS)and distance measuring equipment(DME)airborne multi-source data were used to construct the spoofing detection amount.Based on the Bayes parameter estimation theory,an improved SPRT algorithm was proposed.The spoofing detection amount was used to calculate the adaptive compensation value,and the improved spoofing test statistics were constructed.The spoofing interference was detected using improved spoofing test statistics for accelerating the speed of the algorithm.The simulation results of the cruise stage show that,while meeting the requirements of airborne equipment,the method has better detection performance in the case of multi-satellite spoofing and a small amount of pseudorange spoofing.