Joint Doppler Frequency and rate estimation in FBMC-OQAM system

Mobile Communication systems are affected apparently by the Doppler Frequency and Doppler Rate. In multicarrier systems, because of sensitiveness to frequency offset, estimation and compensation are of great importance, which determine system performance directly. In this paper, we consider this problem in FBMC-OQAM system, and based on the property of it, a proper structure of preamble sequence, combined with classic parameter estimator, is proposed to achieve joint estimation of Doppler Rate, integer Doppler Frequency and fractional Doppler Frequency in FBMC-OQAM system. Simulation results show that performance of the scheme approaches ML estimation. Given the much lower computational complexity than ML algorithm, the scheme is suitable for practical implementation.