Blind maximum likelihood CFO estimation for OFDM systems via polynomial rooting

Author

Gao, Feifei ; Nallanathan, A.

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore

Volume

13

Issue

2

fYear

2006

Firstpage

73

Lastpage

76

Abstract

The blind carrier frequency offset estimation problem has been well studied by exploiting the virtual carriers existing in practical orthogonal frequency division multiplexing transmissions. A highly efficient approach by rooting a polynomial has been proposed in the literature. However, this rooting method is suboptimal when noise is present. In this letter, we propose an improved polynomial rooting method that is shown to be the maximum likelihood estimator for both the noisy and the noise-free case.

Keywords

OFDM modulation; frequency estimation; maximum likelihood estimation; polynomials; CFO; OFDM transmission; blind maximum likelihood estimation; carrier frequency offset estimation; orthogonal frequency division multiplexing; polynomial rooting method; virtual carrier; Bit error rate; Cost function; Frequency division multiplexing; Frequency estimation; Maximum likelihood detection; Maximum likelihood estimation; OFDM; Performance loss; Polynomials; Wireless communication; Blind carrier frequency offset (CFO) estimation; orthogonal frequency division multiplexing (OFDM); polynomial rooting; virtual carriers;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2005.861583

Filename

1576783