Research on Full-duplex Two-Way Time Transfer Techniques for Flying Ad Hoc Networks
In order to solve the problems of time synchronization accuracy degradation of two-way time transfer due to relative motion between nodes in Flying Ad hoc NETwork(FANET),a full-duplex Two-Way Time Transfer(TWTT)method is proposed.Firstly,a system of equations to be solved is constructed according to the full-duplex two-way time transfer procedure,and the synchronization error expression for single full-duplex two-way time transfer is derived.Then,the convergence of iteratively performing full-duplex two-way time transfer with or without frequency offset is analyzed.Finally,the performance of full-duplex two-way time transfer method is compared with traditional two-way time transfer methods by simulation analysis and experimental validation.The simulation and experimental results show that full-duplex two-way time transfer method can achieve the same time synchronization accuracy as the physical layer timestamps under high-speed maneuvering between nodes,and the synchronization accuracy is better than the existing motion compensation methods.
Flying Ad hoc NETwork(FANET)In-Band Full Duplex(IBFD)Two-Way Time Transfer(TWTT)Asymmetric propagation delay
万方数据
维普
