一种OFDM时频捕获与频率跟踪方案

An Timing-frequency Acquisition and Frequency Tracking Scheme for OFDM Systems

基于各种OFDM同步算法,针对PN序列算法存在的不足,提出了一种新的时频同步算法。该算法利用2个训练序列进行时频捕获,同时给出了一种频率跟踪方案。通过仿真验证了新算法性能,并与PN序列算法进行比较,频率估计精度得到了提高。对于给出的频率跟踪方案,理论分析和仿真结果都表明该方案具备实用性。

Based on the former OFDM synchronization algorithms,the authors propose a new timing and frequency synchronization algorithm that makes use of two special training sequences to overcome the shortcomings of the PN algorithm proposed by Park. And the authors also present a scheme of frequency offset tracking. Simulation shows a better performance in frequency offset estimation compared with the PN algorithm. As for the scheme of frequency offset tracking,both the theoretical analyses and simulation results show that the scheme is an efficient one.