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J. J. van de Beek, M. Sandell and P. O. Borjesson, “ML Estimation of Time and Frequency Offset in OFDM Systems,” IEEE Transactions on Signal Processing, Vol. 45, No.7, 1997, pp.1800-1805. doi;10.1109/78.599949

has been cited by the following article:

• TITLE: An Iterative Maximum Likelihood Synchronization Method for OFDM System

  AUTHORS: Chi-Min Li, Wei-Tse Sun

  KEYWORDS: Synchronization; Maximum Likelihood; OFDM

  JOURNAL NAME: Communications and Network, Vol.5 No.2B, July 10, 2013

  ABSTRACT: OFDM system divides a wideband transmission bandwidth into several overlapped narrowband subcarriers to avoid the serious frequency selective fading problem. However, if Timing Offset (TO) and Carrier Frequency Offset (CFO) exist between the Transmitter (Tx) and Receiver (Rx), OFDM system will suffer the Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) that degrade the system performance dramatically. In this paper, we propose an iterative maximum likelihood method for synchronization. We also adopt the overlap concept to reduce the plateau problem. Simulation results show that the proposed method can predict the time delay and frequency offset correctly even under the multipath fading scenarios.