An Improved Timing Synchronization Method for Eliminating Large Doppler Shift in LEO Satellite System

Robust time and frequency synchronization is an essential requirement for initial access in LEO satellite communication systems. However, large doppler frequency shift in LEO satellite communication system severely influences the accuracy of timing synchronization estimation with Zadoff-Chu sequence. In this paper, an improved timing detection method is proposed for LEO satellite communication system, which can achieve accurate time synchronization performance in presence of large the doppler frequency shift.