Low complexity blind estimation of the carrier frequency offset in multicarrier systems

Author

Ferreira, Tadeu N. ; Netto, Sergio L. ; Diniz, Paulo S R ; Baltar, Leonardo G. ; Nossek, Josef A.

Author_Institution

Fed. Univ. of Rio de Janeiro, Rio de Janeiro, Brazil

fYear

2008

fDate

March 31 2008-April 4 2008

Firstpage

3045

Lastpage

3048

Abstract

In orthogonal frequency division multiplexing (OFDM), carrier frequency offset (CFO) must be mitigated since it generates interference between received symbols transmitted through different sub-carriers. This paper presents a new algorithm for CFO estimation with reduced computational complexity. The new approach is based on the segmentation of the input-signal autocorrelation matrix into the noise and signal subspaces, the latter being employed to estimate the desired CFO. Simulations validate the effectiveness of the new algorithm in comparison to the traditional parametric estimation technique ESPRIT.

Keywords

OFDM modulation; blind source separation; correlation methods; frequency estimation; CFO estimation; ESPRIT; carrier frequency offset; computational complexity; digital communications; input-signal autocorrelation matrix; low complexity blind estimation; multicarrier systems; noise subspaces; orthogonal frequency division multiplexing; parametric estimation; received symbols; signal processing; signal subspaces; Communication systems; Computational complexity; Computational modeling; Degradation; Discrete Fourier transforms; Frequency estimation; Intersymbol interference; OFDM modulation; Parameter estimation; Signal processing algorithms; Digital communications; Parameter estimation; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on

Conference_Location

Las Vegas, NV

ISSN

1520-6149

Print_ISBN

978-1-4244-1483-3

Electronic_ISBN

1520-6149

Type

conf

DOI

10.1109/ICASSP.2008.4518292

Filename

4518292