关键词: 正交频分复用, 定时估计, 训练符号, 同步算法

Abstract: Orthogonal Frequency Division Multiplexing (OFDM), as an efficient data transmission technology, has good antifading ability and broad application prospect. However, OFDM is particularly sensitive to the synchronization errors that can greatly decrease the OFDM system performance. In this paper, based on Schmidl-Cox algorithm, by improving the training symbols to complete the symbol timing synchronization, the improved algorithm was given in detail and simulated. The results show that the improved algorithm eliminate the distinction of timing measurement stage and promote the precision of timing estination, moreover,it has lower bit error rate under the same conditions.

Key words: OFDM, timing estimation, training symbol, synchronization algorithm