Research Of UAV Jamming Technology

Since the advent of UAV,it has been widely used in various fields due to its obvious advantages such as strong mission capability,low manufacturing cost and low requirements of flight environment.But there are pros and cons.The potential problems caused by UAV cannot be ignored while enjoying the technological innovations they bring.For a series of problems caused by the popularity of civilian UAV,it is imperative to realize effective control of UAV by means of interference.Based on a preliminary understanding of UAV's development history and system composition,the main research contents of this dissertation are as follows:1)Based on the working principle of UAV communication system and navigation system,the realization principle of UAV interference is expounded.The UAV navigation system is studied emphatically,the composition of GPS signal composition and working principle of receiver are analyzed,and the structure characteristics of the disturbed object are mastered.2)Aiming at the problem of interference effect evaluation,a set of GPS interference effect evaluation system is constructed on the basis of interference effect evaluation criteria.It is analyzed and summarized from navigation system signal reception and processing.Based on this system,the latest interference technology is researched,which has different evaluation methods for the suppress interference or spoofing interference.3)In view of the current research status of spoofing technology,the critical technologies of the research on the repeater spoofing and generated spoofing technology are pointed out.Firstly,in the study of repeater spoofing,the delay calculation algorithm and delay correction method are given,and a series of interference application strategies are set up.Secondly,in the study of generated spoofing,the realization of signal synchronization and navigation message prediction is proposed.Finally,according to the constraint conditions that need to be met in UAV trajectory planning,a preliminary maneuverability constraint model is established,and the planning method of UAV spoofing trajectory is designed.4)Aiming at theoretical research,an interference simulation system,including suppress jamming,spoofing jamming and UAV spoofing trajectory is established,and the analysis is more comprehensive.The system shows the interference effect of different suppressed signals,optimizes the interference performance of narrowband signals,designs a set of receiving and generating spoofing interference scheme based on GPS signals,verifies the correctness of its key algorithms,and determines the feasibility of the scheme of spoofing trajectory planning.All of those lay a foundation for further research on spoofing jamming.