A subspace-based method for blind CFO estimation in OFDM systems

Author

Pan, Yen-Chang ; Phoong, See-May

Author_Institution

Dept. of EE, Nat. Taiwan Univ., Taipei, Taiwan

fYear

2012

fDate

25-30 March 2012

Firstpage

3017

Lastpage

3020

Abstract

Recently, a blind subspace channel estimation algorithm in which using only a few received OFDM blocks is proposed. Based on this earlier work, we introduce a novel subspace-based blind carrier frequency offset (CFO) estimation method for OFDM systems. The CFO is obtained by solving the nullspace of the proposed rank-reduced matrix and the CFO estimate is given in closed form. Moreover, we do not make the assumption that the modulation symbols are white or constant-modulus. Simulation results show that the proposed method performs better than the existing methods.

Keywords

OFDM modulation; channel estimation; matrix algebra; blind subspace channel estimation algorithm; modulation symbols; orthogonal frequency division multiplexing systems; rank-reduced matrix; received OFDM blocks; subspace-based blind CFO estimation; subspace-based blind carrier frequency offset estimation; Eigenvalues and eigenfunctions; Estimation; Mean square error methods; Modulation; OFDM; Signal to noise ratio; Vectors; Carrier frequency offset (CFO); blind method; orthogonal frequency division multiplexing (OFDM);

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing (ICASSP), 2012 IEEE International Conference on

Conference_Location

Kyoto

ISSN

1520-6149

Print_ISBN

978-1-4673-0045-2

Electronic_ISBN

1520-6149

Type

conf

DOI

10.1109/ICASSP.2012.6288550

Filename

6288550