【摘要】 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.更多还原

【Abstract】 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.更多还原