An improvement on distributed detection in clock synchronization for MLAT sensor network

摘要

MLAT (Multilateration) in the civil aviation is a typical sensor network which locates the positions of aircrafts by the TDOAs (Time Difference of Arrivals) of signal from the aircraft to the different remote stations. It is important for MLAT to ensure the clock synchronization. On the basis of CHAN algorithm, this paper proposes an improvement based on TDOA adjustment. In this method, a reference station is introduced. It broadcasts its position periodically to help remote stations track their accumulated error due to environment variation. So the accumulated error is suppressed and the precision is increased. Our experimental result based on both the simulated data and the practical data show our improvement not only can decrease error but also be feasible.