An Adaptive Symbol Synchronization for OFDM Systems Based on PN Sequence-weighted Preamble
Shi Feng①② Hu Deng-peng① Wang Chen② Zhang Er-yang①
①(School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China) ②(Engineering Institute, Air Force Engineering University, Xi'an 710038, China)
Abstract：The conventional timing metric based on Pseudo Noise (PN) sequence-weighted preamble for OFDM systems is analyzed, and an adaptive symbol synchronization method is proposed. With the improved preamble, the proposed method uses the repeated property of the cyclic prefix and the distribution property of timing metric based on PN sequence-weighted preamble to design timing scheme, and carries out adaptive symbol synchronization according to the peak value of timing metric in a selected region. Analysis and simulation results show that compared with the conventional symbol synchronization method based on PN sequence-weighted preamble, the proposed method achieves low false detection probability, and improves the estimation performance for symbol synchronization.
石峰, 胡登鹏, 王晨, 张尔扬. 一种基于PN序列加权前导的自适应OFDM符号同步算法[J]. 电子与信息学报, 2011, 33(5): 1166-1171.
Shi Feng, Hu Deng-Peng, Wang Chen, Zhang Er-Yang. An Adaptive Symbol Synchronization for OFDM Systems Based on PN Sequence-weighted Preamble. , 2011, 33(5): 1166-1171.
2011, Vol. 33 
