Design and Implementation of Time Frequency Synchronization for Aerospace Space Based Signals

A variable parameter physical layer transmission frame structure was designed to address the problem of time-frequency synchronization of aerospace satellite signals. The position of the inserted pilot can be flexibly adjusted according to different dynamic parameters. Combined with a carrier tracking algorithm based on vitbi decoding and third-order phase-locked loop, high-precision time-frequency synchronization was achieved. The simulation results show that this method can adapt to high dynamics with a flight speed of 20 Mach and an acceleration of 40g, and the system error performance is only lost by 0.3dB.