Joint carrier frequency synchronization and channel estimation for OFDM systems via the EM algorithm

Author

Lee, Jong-Ho ; Han, Jae Choong ; Kim, Seong-Cheol

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea

Volume

55

Issue

1

fYear

2006

Firstpage

167

Lastpage

172

Abstract

A joint carrier frequency synchronization and channel estimation scheme is proposed for orthogonal frequency-division multiplexing (OFDM) system. In the proposed scheme, carrier frequency synchronization and channel estimation are performed iteratively via the expectation-maximization (EM) algorithm using an OFDM preamble symbol. Moreover, we analytically investigate the effect of frequency offset error on the mean square error (MSE) performance of channel estimator. Simulation results present that the proposed scheme achieves almost ideal performance for both channel and frequency offset estimation.

Keywords

OFDM modulation; channel estimation; expectation-maximisation algorithm; mean square error methods; synchronisation; EM algorithm; OFDM systems; carrier frequency synchronization; channel estimation scheme; expectation-maximization algorithm; iterative methods; mean square error method; orthogonal frequency division multiplexing; Channel estimation; Fading; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Iterative algorithms; Maximum likelihood estimation; Mean square error methods; OFDM; Performance analysis; Channel estimation; expectation–maximization (EM); frequency synchronization; orthogonal frequency-division multiplexing (OFDM);

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2005.861212

Filename

1583925