Research On Cooperative Electromagnetic Interference Methods For Communication And Navigation Of UAV

In recent years,with the UAV technology at home and abroad developing rapidly,the market size of UAVs is expanding constantly.UAVs are very active in both civilian and military fields.Whether it is to solve the "black flying" problem of drones in the civilian field,or to counter the enemy’s drone army in the military field,we need to focus on the development of countermeasure technology for drones.After analyzing the development status of UAV countermeasure technology at home and abroad,this thesis summarizes the previous work based on the characteristics of UAV’s data link,communication system,and communication frequency,and comprehensively improves the anti-drone electromagnetic interference technology for UAV datalinks.The detailed tasks are:(1)The data link composition of the UAV is studied.Briefly introduce the data link of the drone,and deeply analyze the frequency hopping communication system commonly used in the uplink communication link of the drone and the direct sequence spread spectrum communication system commonly used in the navigation link,and analyze the principle and system composition of the two systems respectively,information transmission mode and signal characteristics provide a theoretical basis for the interference of the two systems later.(2)The communication system of UAV communication link and navigation link is built.Based on the Simulink software platform,two communication systems were built in a modular design,and detailed structural analysis and functional verification were carried out for each module in the system,further verifying the feasibility of the communication system as a whole,and providing a basis for the computer-based The model is provided for interference simulation at the level.(3)The computer simulation and actual experimental verification of UAV jamming have been completed.First of all,based on the two communication systems that have been built,a number of different interference signals are given successively.First,the basic theory,interference mode,signal characteristics and interference feasibility of different interference signals are analyzed from the theoretical level,and the computer simulation level is analyzed.Verify its impact on the bit error of the communication system and the factors that affect the effect of signal interference.Then,a jamming experiment was carried out on the actual UAV,and the SMF 100 A signal source was used to generate a 2 MHz pulse width pulse signal for partial frequency band jamming.When the drone was disturbed,the image turned to black and white,and landed on the spot after hovering for a period of time.