Frequency offset estimation with fast acquisition in OFDM system

Author

Zhang, Zhongshan ; Zhao, Ming ; Zhou, Haiyan ; Liu, Yuanan ; Gao, Jinchun

Author_Institution

Center for Wireless Commun., Beijing Univ. of Posts & Telecommun., China

Volume

8

Issue

3

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

171

Lastpage

173

Abstract

A new carrier frequency offset estimation scheme in orthogonal frequency-division multiplexing (OFDM) system is proposed. The carrier frequency offset estimation includes acquisition and tracking, and the acquisition range is as large as one half of overall signal bandwidth. The proposed tracking estimator is a maximum-likelihood estimator, and in AWGN channel, the Cramer-Rao lower bound is met at high signal-to-noise ratio (SNR); in multipath channel, the tracking algorithm works well at moderate SNR. Timing synchronization can be also performed during the course of acquisition.

Keywords

AWGN channels; OFDM modulation; frequency estimation; maximum likelihood estimation; multipath channels; synchronisation; AWGN channel; Cramer-Rao lower bound; OFDM; carrier frequency offset estimation scheme; fast acquisition; maximum-likelihood estimator; multipath channel; orthogonal frequency-division multiplexing system; overall signal bandwidth; signal-to-noise ratio; timing synchronization; tracking algorithm; AWGN channels; Bandwidth; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; Multipath channels; OFDM; Signal to noise ratio; Timing;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2004.823423

Filename

1278311