Research On Anti-jamming Technology Of UAV Uplink

In the lastest local wars,the splendid performances of Unmanned Aerial Vehicle(UAV)have been widely recognized by many countries.The research on UAV has become one of the hotspots in the field of high-tech equipment,and the related technology has developed rapidly driven by military requirement.UAV uplink,which has been described as UAV’s lifeline,is an important part of UAV system,it is mainly used to transfer the remote control instruction,such as flight control data and mission load control data,from the ground control station to the UAV.The spoofing jamming in UAV uplink refers to an emerging technology,which can jammed effective with lower power by faking the real uplink signal.With the rapid development of electronic countermeasure technology,spoofing jamming is becoming a real threat to UAV.As of now,there are no open materials presenting the detail on the UAV uplink anti-spoofing.Aiming at such problem,a method of anti-spoofing jamming is designed in this paper to meet the increaseingly pressing needs in UAV uplink.The characteristics of UAV uplink are studied,and the mechanism of deception jamming is analyzed in this paper.The research on the characteristics of uplink and the mechanism of spoofing jamming expounds the necessity of the anti-spoofing jamming technology in UAV uplink,and lays the foundation for the design of anti-spoofing jamming method.On this basis,a new anti-spoofing scheme for UAV uplink is proposed to resist spoofing jamming.The proposed anti-spoofing scheme is designed in two aspects: the acquisition and tracking phase in signal processing layer and the data bits phase in information processing layer.In the acquisition and tracking phase,a spoofing detection method relying on observing an abnormal total number of detected correlation peaks is implemented to detect the existence of spoofing jamming.The acquisition process of the receiver is modified to detect all available signals above the acquisition threshold and pass them to the tracking process,and then according to the signal power,the signals are classified as true uplink signal and spoofing signals;and by using the successive spoofing cancelation algorithm to remove the spoofing signals.In the data bits phase,UAVs take the proposed encryption-authentication mode,OKXCBC,to authenticate the received information,if authentication fails,theprocess of singal classification and successive spoofing cancelation should be executed again until the authentication is passed.The proposed method can be implemented without any additional hardware overhead,and has low complexity and excellent reliability,which are suitable for the UAV’s characteristics of weak computing power and the high real-time requirement of the uplink.The model of the proposed anti-spoofing jamming method is built by Matlab and C language to simulate the real conditions.Simulation results and analysis show that the proposed method can detect,classify and eliminate the spoofing jamming effectively,and guarantee the authenticity of the received information by the proposed encryption-authentication mode.The research indicates that the proposed scheme can effectively avoid the effect of spoofing jamming by removing the spoofing signals and authenticating the incoming information.