一种新的OFDM符号定时和频率同步方案

提出了一种新的基于单个训练符号的OFDM系统的时频同步算法．该算法在基于单个训练符号同步算法的基础上，通过对训练符号的重新设计。以一种新的方式引入了伪随机序列加权因子．极大地提高了OFDM的同步性能，仿真结果表明．该算法可实现极高的符号定时性能。同时保证了即使在多径信道下算法还具有很高的频偏估计精度．

A new timing and frequency synchronization method for OFDM systems

A novel timing and frequency synchronization algorithm is proposed for orthogonal frequency division multiplexing (OFDM) systems requiring only one training symbol.Based on the analysis of the conventional methods,the proposed algorithm redesigns a modified training symbol which is weighted by the pseudo-noise(PN) sequence in a new manner.This algorithm can improve the synchronization performance greatly.Simulation results show that the proposed algorithm not only possesses better timing synchronization performance than the conventional method,but also ensures a higher accuracy of frequency synchronization estimation even in the multipath fading channel.