Design And Implementation Of Lightweight UAV Data Link System Based On Software Radio Platform

In recent years,unmanned aerial vehicle(UAV)applications have been developed rapidly in many fields.As one of the core technologies for UAVs to complete flight and various tasks efficiently,data link systems have been highly concerned at home and abroad.However,traditional UAV data links have heavy infrastructure and slow transmission rate,which cannot meet the growing requirements of big data multimedia communication.Therefore,a data link system with lightweight,low power consumption and high transmission rate is urgently needed to cope with the rapid development of UAVs,especially medium or small UAVs,and their application requirements in specific scenarios.Facing the above requirements,this thesis explores the design and implementation of a UAV data link system based on ZYNQ+AD9371 software defined radio(SDR)platform,which is focused on the baseband transceiver functions of the data link system and tries to improve the data transmission rate,in order to realize the lightweight and low power consumption.Firstly,based on the thorough investigation of the development trend of data links and the research status at home and abroad,this thesis proposes an optimal platform selection scheme,completes the transmission parameters and frame structure design with the project requirements,and makes detailed analysis and design for the overall infrastructure and hardware function division of the data link system.Secondly,this thesis designs and impletments the baseband transmitter link of the data link system,and emphatically elaborates its design idea and implementation scheme of each functional module and the overall timing logic of the baseband transmitter link.In addition,this thesis verifies key functional modules of the baseband transmitter link with the hardware platform simulation software.Then,the thesis designs and implements the baseband receiver link of the data link system,and emphatically elaborates its design idea and implementation scheme of frame synchronization module and other functional modules.Similar to the transmitter link,this thesis also verifies key functional modules of the baseband receiver link with the hardware platform simulation software.Finally,this thesis completes the on-board functional verification of the data link system by building a physical verification environment.The analysis of the verification results shows that the baseband link transceiver functions are correct,and have lower hardware resource occupation rate and system power consumption.