Maximum likelihood estimation of OFDM carrier frequency offset

Biao Chen, Hao Wang

Research output: Contribution to journalConference Articlepeer-review

13 Scopus citations


Blind estimation of the OFDM carrier frequency offset (CFO) is studied in this paper. Maximum likelihood estimation is developed in the presence of virtual carrier. It turned out that the resulting estimator has an identical form to that of a previously proposed blind estimation scheme by Liu and Tureli. We explain, using the projection argument, why these two estimators are equivalent. For improved CFO estimation performance, multiple OFDM blocks can be utilized. Alternatively receiver diversity may be used in the CFO estimation. We show that in both cases, the estimator again reduces to the form similar to that of the MUSIC-like algorithm as in [1]. Performance improvement is shown using both the Cramer Rao Lower Bound and numerical examples.

Original languageEnglish (US)
Pages (from-to)49-53
Number of pages5
JournalIEEE International Conference on Communications
StatePublished - 2002
Event2002 International Conference on Communications (ICC 2002) - New York, NY, United States
Duration: Apr 28 2002May 2 2002

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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