Abstract: Orthogonal frequency division multiplexing (OFDM) systems are very sensitive to the synchronization error. In this paper, we present an algorithm for blind estimation of symbol timing and carrier frequency offsets in wireless OFDM systems. The algorithm exploits only the second-order cyclostationarity of received signals and dose not need additional pilots. The simulation results demonstrate the high performance of the proposed estimator over different channels with the characteristic of its adaptation to channels.

Key words: orthogonal frequency division multiplexing(OFDM), cyclostationarity, time and frequency synchronization