Research Of Beidou Deceive Jamming Signal Detection

Now the Global Navigation Satellite System(Global Navigation Satellite System,GNSS)used in people's production and life becomes more and more widely,the frequency of use is also gradually increased,and the military also increasingly depends on GNSS.With the promotion of satellite navigation,the accuracy of GNSS data and the reliability of service have aroused people's concern.Because the signal structure of GNSS civilian frequency segment is public,at the same time,GNSS has the characteristics of the low signal power,so that some people with ulterior motives can interfere with the service reliability of GNSS from multiple aspects.GNSS interference method is mainly divided into pressing type interference and spoofing interference,in which the pressing type interference will have some impact on all regions with the scope of the whole navigation equipment,and thus easily to be identified.So the application of pressing type interference is limited.Spoofing interference,however,is done by forging a fraudulent signal that is similar to a real satellite signal to make the receiver to receive spoofing signal information,it's hard to detect interference receiver,which leads the receiver to give incorrect positioning results.And with the progress of software radio technology,spoofing interference becomes more flexible,cost also becomes lower,spoofing interference threatening is gradually strengthened.Meanwhile,as the independent research and development of Beidou satellite navigation system in our country,it is also suffering the risk of spoofing interference.The existing method of spoofing interference resistance is mainly spoofing interference detections,there are fewer strategies to inhibit spoofing interference.At the same time,it is mostly suppress the spoofing interference by using multi-antenna technology and the integrity detection technology,which requires more hardware resources and higher cost.Therefore,this article focuses on the study of less hardware resources,lower cost of Beidou spoofing interference technology.The article systematically elaborates the current situation of satellite navigation system at first.Meanwhile,the research situation of spoofing interference detection technology at home and abroad has been comprehensively summarized,and then the research direction is determined.Secondly,studying the characteristics of the Beidou signals,according to the related principle of Beidou receiver software,the simulation program of Beidou software receiver is designed and written.Based on this,the multi-peak and power co-detection algorithm of the capture phase is studied,meanwhile,this paper puts forward the anomaly detection algorithm and tracking phase power Doppler shift detection algorithm that canaccurately and efficiently detecting spoofing interference signal.On the basis of studying the above detection algorithm,this paper designs the tracking capture spoofing interference suppression algorithm of joint detection method and achieves the inhibition of spoofing interference signal.The simulation results show that the proposed Beidou detecting spoofing interference of overall scheme can effectively detect and inhibit spoofing interference signals,this paper proves the effectiveness of Beidou anti-spoofing interference algorithm.