Data-Aided Parameters Estimation of Satellite-Based AIS Signals
She Xiang Ma, Xiao Juan Liu, Xin Meng · Advanced materials research · 2013
Aiming at the problem of poor accuracy and small range of frequency estimation in the area of satellite-based AIS signals, this paper presents a novel data-aided estimation method based on the autocorrelation and DFT. The algorithm determines the principal value and the expansion of the frequency and then acquires high-precision estimation by data fitting. Based on that, other parameters can be estimated. Computer simulations were used to illustrate better estimation accuracy and a large estimation range.