Blind maximum likelihood CFO estimation for OFDM systems via polynomial rooting

FF Gao*, A Nallanathan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

The blind carrier frequency offset estimation problem has been well studied by exploiting the virtual carriers existing in practical orthogonal frequency division multiplexing transmissions. A highly efficient approach by rooting a polynomial has been proposed in the literature. However, this rooting method is suboptimal when noise is present. In this letter, we propose an improved polynomial rooting method that is shown to be the maximum likelihood estimator for both the noisy and the noise-free case.

Original languageEnglish
Pages (from-to)73-76
Number of pages4
JournalIEEE SIGNAL PROCESSING LETTERS
Volume13
Issue number2
DOIs
Publication statusPublished - Feb 2006

Keywords

  • blind carrier frequency offset (CFO) estimation
  • orthogonal frequency division multiplexing (OFDM)
  • polynomial rooting
  • virtual carriers
  • CARRIER FREQUENCY OFFSET

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