Doppler Estimation for Aeronautical Satellite OFDM System Based on AoD and AoA

This Study investigates the potential approach of using Angle of Departure (AoD) and Angle of Arrival (AoA) to mitigate Doppler frequency for OFDM (Orthogonal Frequency Division Multiplexing) system in Aeronautical satellite mobile system. The Proposed approach is based on subspace estimation. The Doppler effect is one of the significant issues in implementing OFDM modulation in the mobile multipath channel since the received carrier frequency shifts, and Doppler spread results in inter-carrier interference (ICI). Utilizing both AoD and AoA will increase estimation accuracy. The satellite aeronautical channel is considered for evaluation in the proposed approach. Simulation results show improved error resolution estimation accuracy and the system performance for multiple Doppler shifts.