| UAV data link is a communication link,which based on a specific communication protocol for data transmission among the UAV platform and the ground by radio,which used to ensure the reliability of the information transmission of the various functional units in the UAV system.With the rapid development of advanced sensor technology and its extensive application in intelligence reconnaissance platform,UAV platform needs to communicate with other platform,which involves the protocol interaction between the data links,the protocol interaction between the data link and other communication systems,which requires a data link protocol interaction.Due to the important role of data link between military and civilian areas in the future,carrying out the research of data link interaction technology for UAV platform has extremely important theoretical and practical significance.On the background of sea rescue,the study on the data link interaction technology is carried out between the UAV and other platforms,such as relay satellite,ground command center and communication statellite.Firstly,the analysis of UVA development,data link and data link interaction at home and abroad are carried out;due to the data link interaction mainly refers to the interaction between the data link and other communication systems,so it is necessary to make a research and analyze between the data link protocol and other communication protocol.The message frame structure of Link-16 data link protocol,AOS protocol and HDLC protocol are mainly studied,and the interaction method is analyzed.Then,the demand analysis and the overall interaction scheme design of the data link protocol interaction gateway based on the data link layer is carried out.At the same time,the LINK,AOS and HDLC message frames needed for data link interaction are designed and simulated.Further,the key modules of the data link protocol interactive gateway like authentication and filtering module,data encryption and verification module,protocol conversion module are designed.On the basis of this,the whole data link protocol interactive gateway is simulated under VC6.0 software.The feasibility and effectiveness of the data link protocol interaction is verified through the simulation.At the same time,the key technology of Link-16 data link in frequency hopping system is analyzed and researched,and the key module of Link-16 data link signal is designed.Finally,thedesign of the Link-16 data link signal generation module of the frequency hopping system is completed under the general software radio development platform,and the function verification is carried out by Modelsim SE6.5b and spectrum analyzer. |
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