Frequency offset estimation algorithm based on differential coding for OFDM systems

A new frequency offset estimation algorithm for orthogonal frequency division multiplexing(OFDM) system was proposed.Using differential encoding,frequency offset can be estimated by using two received OFDM symbols without requiring channel state information which makes it suitable for burst communication. Requiring only one training sequence the algorithm can estimate frequency offset efficiently.While the timing synchronization can be obtained by using the training symbol.Through the wideband HF channel,the simulation results show that,the proposed method improved the accuracy of frequency offset estimation comparing with conventional algorithm.