Blind carrier frequency offset estimation in SISO, MIMO, and multiuser OFDM systems

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Relying on a kurtosis-type criterion, we develop a low-complexity blind carrier frequency offset (CFO) estimator for orthogonal frequency-division multiplexing (OFDM) systems. We demonstrate analytically how identifiability and performance of this blind CFO estimator depend on the channel's frequency selectivity and the input distribution. We show that this approach can be applied to blind CFO estimation in multi-input multi-output and multiuser OFDM systems. The issues of channel nulls, multiuser interference, and effects of multiple antennas are addressed analytically, and tested via simulations.

Original languageEnglish (US)
Pages (from-to)173-183
Number of pages11
JournalIEEE Transactions on Communications
Issue number1
StatePublished - Jan 2005

Bibliographical note

Funding Information:
Paper approved by G. M. Vitetta, the Editor for Equalization and Fading Channels of the IEEE Communications Society. Manuscript received November 4, 2003; revised January 30, 2004 and March 31, 2004. This paper was prepared through collaborative participation in the Communications and Networks Consortium sponsored by the U.S. Army Research Laboratory under the Collaborative Technology Alliance Program, Cooperative Agreement DAAD19-01-2-0011. The U. S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation thereon. This paper was presented in part at SPAWC, Lisbon, Portugal, July 2004, and in part at MILCOM, Monterey, CA, October-November 2004.


  • Carrier frequency offset (CFO)
  • Kurtosis
  • Multi-input multi-output orthogonal frequency-division multiplexing (MIMO-OFDM)
  • Multiuser OFDM
  • Orthogonal frequency-division multiplexing (OFDM)


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