An eigenvalue based carrier frequency offset estimator for OFDM systems

Abdel Aziz M Al-Bassiouni, Muhammad Ismail Muhammad, Weihua Zhuang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Orthogonal frequency division multiplexing (OFDM) is sensitive to frequency synchronization errors. This letter proposes a novel data-aided carrier frequency offset (CFO) estimator. We show that the eigenvalues of the inter-carrier interference (ICI) coefficient matrix are the elements of a geometric series distributed on the unit circle of the complex plane. Then, we prove that estimating the CFO is equivalent to finding the eigenvalues of a two-dimensional ICI coefficient matrix. As a result, by transmitting the corresponding eigenvectors, an estimate of the CFO value can be found. In addition to its simplicity, the proposed estimator is proven to be a maximum likelihood estimator. Simulation results are presented to demonstrate the high accuracy of the proposed estimator in presence of channel noise and fading.

Original languageEnglish
Article number6523041
Pages (from-to)475-478
Number of pages4
JournalIEEE Wireless Communications Letters
Volume2
Issue number5
DOIs
Publication statusPublished - 2013
Externally publishedYes

Fingerprint

frequency division multiplexing
carrier frequencies
estimators
Orthogonal frequency division multiplexing
eigenvalues
Eigenvalues and eigenfunctions
Maximum likelihood
Synchronization
frequency synchronization
channel noise
interference
fading
coefficients
eigenvectors
estimating
estimates
simulation

Keywords

  • carrier frequency offset estimation
  • frequency synchronization errors
  • Orthogonal frequency division multiplexing

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering

Cite this

An eigenvalue based carrier frequency offset estimator for OFDM systems. / Al-Bassiouni, Abdel Aziz M; Muhammad, Muhammad Ismail; Zhuang, Weihua.

In: IEEE Wireless Communications Letters, Vol. 2, No. 5, 6523041, 2013, p. 475-478.

Research output: Contribution to journalArticle

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