Design And Implementation Of Anti-Jamming Performance Test System For UAV Communication

UAVs have the advantages of low cost,simple operation,good maneuverability and strong adaptability.They have been used more and more widely in various applications.However,the mission execution capability of UAV is also facing increasing severity of electromagnetic environment and malicious interference.In order to ensure that the UAV can maintain normal communication and perform tasks correctly in a complex environment,a reliable Anti-Jamming performance test system is required during the development process.Such a test system can help analyze and verify the performance of the designed UAV communication data link in different electromagnetic environments and interference modes,so as to ensure the UAV has good Anti-Jamming performance.Based on Hardware-In-the-Loop simulation technology,this thesis designs and implements a UAV communication Anti-Jamming performance test system,which can test the Anti-Jamming performance of UAV communication.The main works of the thesis are as follows:Firstly,according to the results of the research work,the medium propagation characteristics and interference theory of the UAV communication channel are briefly introduced.The path loss,shadow effect,multipath effect and Doppler effect are analyzed in details,and then forwarded interference,noise modulation interference,discrete comb spectrum interference,and frequency-sweeping interference are separately analyzed by mathematical analysis and Matlab simulation.The unit composition of the test system and the functional indicators of each unit are obtained,thereby giving an overall design scheme of the UAV communication Anti-Jamming performance test system,including the design of the system structure and the arrangement of the work flow.Secondly,based on the proposed overall design,the implementation of the entire test system has been completed from the hardware and software levels.The hardware level focuses on the simulation of the data link signal and interference scene unit in the system,and gives the hardware implementation structure and simulation results of each part.At the software level,according to the division of functional modules in each unit,the design and implementation of system self-test,equipment calibration,Anti-Jamming performance test environment simulation and Anti-Jamming performance evaluation are completed.Finally,according to the characteristics of the UAV communication Anti-Jamming performance test system,a complete test verification scheme is proposed for key functions,include the signal and channel simulation function,the antenna measurement control function,the Anti-Jamming performance evaluation function,and the system closed-loop test function.Combined with the measured results,the validity and correctness of the UAV communication Anti-Jamming performance test system designed in this thesis are verified.