Pilot-assisted maximum-likelihood frequency-offset estimation for OFDM systems

@article{Yu2004PilotassistedMF,
  title={Pilot-assisted maximum-likelihood frequency-offset estimation for OFDM systems},
  author={Jiun H. Yu and Yu Ted Su},
  journal={IEEE Transactions on Communications},
  year={2004},
  volume={52},
  pages={1997-2008}
}
For orthogonal frequency-division multiplexing (OFDM) signals that suffer from frequency-selective fading, we derive the maximum-likelihood (ML) pilot-assisted carrier frequency offset (CFO) estimate and show that most proposals based on repetitive pilot symbols did not use the complete set of sufficient statistics. We convert the problem of obtaining the ML solution from searching exhaustively over the entire uncertainty range to that of solving a spectrum polynomial, thereby greatly reducing… CONTINUE READING

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