Studies of an Optimally Unbiased MA Filter Intended for GPS-Based Timekeeping

摘要: Abstract : In this paper, we examine one of the possible approaches to design an optimally unbiased moving average (MA) filter intended for time error online estimating and synchronization in timekeeping. The approach is based on slowly changing nature a generated by local clock has led simple formula MA filter, which does not require any priori knowledge about process. When filtering various GPS-based processes, found out that, filters with same constant, designed demonstrates intermediate between three-state two-state Kalman filters. been examined numerically simulated data some practical situations errors crystal rubidium oscillators.