A novel integer frequency offset estimator for OFDM

Author

Chen, Chen ; Li, Jiandong ; Han, Gang

Author_Institution

Broadband Wireless Commun. Lab., Xidian Univ., Xi´´an, China

Volume

1

fYear

2004

fDate

31 May-2 June 2004

Firstpage

29

Abstract

A novel estimator for integer frequency offset estimation of OFDM systems is derived, which is based on maximum likelihood (ML) technique and exploits the differential information between two consecutive OFDM data symbols sequences in frequency domain. The reason why the ML estimator has better performance than the conventional method is analyzed. The effects of integer frequency offset, system parameters, and differential PN sequence on the performances of the two estimators are analyzed. How to select the differential sequence is also studied. By computer simulations, the performance of the ML estimator is compared with that of the conventional method for the additive white Gaussian noise (AWGN) channel and a multipath fading channel. The simulation results are in good agreement with the analytical study.

Keywords

AWGN channels; OFDM modulation; fading channels; frequency estimation; maximum likelihood estimation; multipath channels; OFDM data symbols sequence; OFDM system; additive white Gaussian noise channel; differential PN sequence; integer frequency offset estimator; maximum likelihood technique; multipath fading channel; orthogonal frequency division multiplexing; AWGN; Additive white noise; Computational modeling; Computer simulation; Fading; Frequency domain analysis; Frequency estimation; Maximum likelihood estimation; OFDM; Performance analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Emerging Technologies: Frontiers of Mobile and Wireless Communication, 2004. Proceedings of the IEEE 6th Circuits and Systems Symposium on

Print_ISBN

0-7803-7938-1

Type

conf

DOI

10.1109/CASSET.2004.1322909

Filename

1322909