Journal of Systems Engineering and Electronics ›› 2013, Vol. 35 ›› Issue (3): 619-623.

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Blind symbol synchronization algorithm for OFDM systems based on polynomial fitting

ZHAO Jun-hui1，2,3， LVChen1,3   

  1. 1. State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China; 
    2. National Mobile Communication Laboratory, Southeast University, Nanjing 210096, China；
    3. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China
  • Online:2013-03-20 Published:2010-01-03

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Abstract:

A low complexity blind symbol synchronization algorithm based on cyclic prefix for orthogonal frequency division multiplexing (OFDM) systems is proposed.This algorithm can remove the redundant information of the correlation functions by its inner structural properties and can directly find the peak position. A synchronization function is derived by polynomial fitting. Meanwhile, the time complexity can be reduced effectively and the precision of the estimation of channel delay is guaranteed. Simulation results show that the algorithm can obtain a good performance under the frequency selective fading channels, and the required computing time is shortened significantly compared with other blind synchronization algorithms.

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