A novel distributed joint time-frequency domain carrier synchronization algorithm

Considering both inefficiency of the pilot usage and high complexity of current carrier synchronization algorithms for burst-mode systems, a novel distributed joint time-frequency domain (DJTFD) carrier synchronization algorithm is proposed. The frequency-domain estimation has a large residual offset with limited pilot overhead. So we need the distributed time-domain estimation to guarantee both large estimation range and high accuracy. First, coarse frequency estimation is performed based on the frequency domain rotation periodogram averaging (RPA) algorithm. Then the time-domain cross correlation algorithm is utilized to obtain fine frequency estimation. Simulation results show that the proposed algorithm has both higher accuracy and lower complexity compared with the existing carrier estimation algorithms and the distributed processes can improve efficiency of pilot utilization.