Research On Data Link Network Synchronization Technology And Optimization Algorithm

With the development of military technology,the role of data link,which can connect the combat platform,distribute tactical information,deploy operational resources,and improve joint operational capability,is becoming increasingly important in the war.Link16 is the most representative of the universal combined tactical data link,which has the function of information sharing and unified situation.It adopts TDMA networking,so network synchronization is an important prerequisite for realizing various functions.The research on Link16 network synchronization technology is of great significance to the development and application of our army’s TDMA data link system.This thesis takes Link16 data link synchronization technology as the research object,and its system characteristics,message structure and various key technologies are analyzed.Its TDMA time allocation and network role allocation are outlined,and Link16 data link network synchronization process is described in detail.A coarse synchronization scheme and two improved fine synchronization algorithms are proposed in this paper,which provides a new way of thinking for the further study of synchronization technology.According to the characteristics of network access message synchronization and frequency hopping synchronization,a coarse synchronization 8-channel implementation scheme is proposed in this paper,which adopts MSK incoherent demodulation,uses the correlation probability and correlation performance of synchronization sequence,designs two threshold decision methods: single pulse and double pulse,and the simulation of the coarse synchronization design scheme on the Modelsim platform is completed.Aiming at the motion error of traditional RTT algorithm and existing algorithm,an improved algorithm DR-RTT is proposed,the simulation results show that DR-RTT algorithm reduces the motion error by 85%.By analyzing the synchronization slot structure of basic fine synchronization,an improved algorithm C-RTT that can reduce the number of synchronization slots is proposed in this paper,which can improve the slot resource utilization rate of 6.57% per hour cell per network.