A method of multi-station time synchronization based on ADS-B

The time synchronization accuracy affects the positioning accuracy of multi-station passive positioning system significantly and poor time synchronization may even lead to inability to locate. In this work, we propose a multi-station time synchronization method based on the joint ADS-B signal and Doppler information for inter-station time synchronization at the receiving station. The method obtains the enhanced ADS-B information which provides more accurate location and direction of velocity through the signal Doppler frequency. Then estimating the time delay with the enhanced ADS-B data and the accurate multi-station time synchronization can be calculated. It is verified that the proposed method solves the problem of unsynchronized time across multiple stations effectively and has high accuracy through simulation experiments.