Time and Frequency Synchronization Techniques for

OFDM Systems operating in Gaussian and Fading

Channels: A Tutorial



The aim of this paper is to survey and compare

previous methods for Data-aided timing and frequency

synchronization of OFDM System. In the sequel, we propose a fast

and accurate FFT-based frequency offset estimation. The

synchronization techniques are examined in Gaussian andMultipath fading environments for comparison. The results of the

performance comparison are presented in terms of mean andmean-square error (MSE) obtained by simulations. The timing

offset estimator with best performance is chosen for system timingsynchronization. The FFT-based frequency offset estimation

method has significantly smaller MSE than others can beperformed using the same timing training symbol. Therefore,there is only one training symbol needed as preamble in whole

synchronization process.