关键词: 正交频分复用, 循环前缀, 符号定时同步, 多径衰落信道

Abstract:

In orthogonal frequency division multiplexing (OFDM) system, the properties of cyclic prefix (CP) energy difference and set correlation are not destroyed at the back of CP in multipath fading channels. Optimum combined with the two merits, a new time synchronization method is proposed in this paper. Simulation results demonstrate that the proposed method has good timing estimation performance over multipath fading channels. And the proposed method is robust to the frequency offset and the performance will be further improved with the increasing of Dopple r frequency shift.

Key words: orthogonal frequency division multiplexing, cyclic prefix, symbol timing synchronization, multipath fading channels