BOC接收机捕获阶段转发式欺骗信号检测算法  

A Repeater Spoofing Signal Detection Algorithm in GNSS Acquisition Period of BOC Modulation Receiver

作　　者：王芝应 聂俊伟[1] 李峥嵘[1] 孙广富[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《全球定位系统》2016年第5期13-17,共5页Gnss World of China

摘　　要：针对卫星导航BOC调制接收机捕获阶段存在转发式欺骗干扰信号的检测问题,提出了一种基于相关峰个数判别及功率大小分析的检测算法。该算法是利用捕获阶段存在相关峰的个数与是否存在干扰信号密切相关,通过欺骗信号功率高于真实信号来建立检测模型,给出了判决门限的计算方法及ROC曲线,实现了转发式欺骗干扰信号的检测。仿真表明,随着接收机相关值后积累次数及欺骗信号相对于真实信号功率强度的增加,该算法的检测概率越高,可在欺骗干扰信号功率高于真实信号功率4dB时,在0.7%的虚警概率下实现95%以上的检测概率,对捕获阶段的转发式欺骗信号具有较好的检测效果。For repeater spoofing signal detection in GNSS acquisition period of BOC modulation,this paper puts forward a detection algorithm based on the numbers of correlation peaks and the power of signals.This paper firstly utilizes the relationship between the numbers of correlation peaks and the presence of spoofing signals.Secondly,make the detection model of spoofing signal＇s power higher than the authentic signal＇s power.Thirdly,this paper gives the calculation manner of judgment threshold and ROC curve.Finally,meet the requirement of detecting the spoofing signals.Simulation results show that the more times of the receiver＇s correlation accumulation and the more improvement of the authentic signal＇s power,the higher detection probability the method provides.Under the circumstance of the spoofing signal＇s power 4dB higher than the authentic signal＇s power while the 0.7% of false alarm probability,the detection probability can reach up to more than 95% which proves significant ability to detect spoofing signals in acquisition period.

关 键 词：GNSS 转发式欺骗干扰 BOC 

分 类 号：P228.4[天文地球—大地测量学与测量工程]