A novel acquisition tracking algorithm for SATCOM on-the-move

In order to improve SOTM's performance and solve the contradiction between the initial acquisition speed and the tracking accuracy of traditional algorithm for SOTM, a new initial acquisition and tracking algorithm based on variable step size was proposed. This algorithm can result in bigger step size in initial acquisition and re-acquisition stage and smaller step size in tracking stage. The simulation results confirm the theoretical analysis and show that this proposed scheme can keep lower computational complexity, with faster initial acquisition speed and higher tracking accuracy.