A novel frequency synchronization method for wireless OFDM systems

In this paper, we propose a new frequency synchronization method for wireless orthogonal frequency division multiplexing (OFDM) systems. The method exploits the pilots´ energy efficiently by collecting the energy leaked into the neighbor subcarriers, and provides the coarse and fine estimation of the frequency offset at the same time. Furthermore, an adaptive accumulator is used to attain a good tradeoff between the performance and the synchronization time. Computer simulation results demonstrate that the proposed method performs well at various Doppler frequency shifts with a fairly short synchronization time.