Abstract: Based on the analysis of the synchronization training symbols in orthogonal frequency division multiplexing (OFDM) systems, a new training symbol weighted by the pseudo-noise(PN) sequence is designed, and the corresponding synchronization method is proposed. In the proposed method, the correlation properties of the PN weighted factor and the training symbol are utilized in the timing offset estimation. Based on the timing synchronization, the PN weighted factor in the training symbol is removed, and the renewed training symbol is used to estimate the frequency offset. Simulation results show that the accuracy of timing synchronization and the estimate range of the frequency offset outperform those of the other available methods.

Key words: OFDM, training symbol, synchronization offset estimation