Time and frequency synchronization algorithm using training sequence for OFDM systems

Frequency offset and timing error seriously influence the performance of the Orthogonal Frequency Division Multiplexing (OFDM) system. Based on the special symmetric pilot sequence and known frequency synchronization methods, an improved timing and frequency synchronization method is presented. By using one OFDM pilot inserted in both time and frequency areas, the method can simultaneously implement timing and frequency synchronization, which can increase the efficiency of wireless data transmission. Simulation and analysis shows, with this special well-correlated symmetric pilot to implement accurate timing synchronization, the frequency offset estimation performance is greatly improved compared with S&C algorithm.