A Novel Method of Frequency-Offset Estimation Using Time Domain PN Sequences in OFDM Systems

Author

Gui, Lin ; Liu, Bo ; Ma, Wenfeng ; Song, Bowei

Author_Institution

Shanghai Jiao Tong Univ., Shanghai

Volume

54

Issue

1

fYear

2008

fDate

3/1/2008 12:00:00 AM

Firstpage

140

Lastpage

145

Abstract

In some OFDM systems, time domain cyclic pseudo-random (PN) sequences are inserted between OFDM symbols. This paper proposes a frequency-offset estimation method utilizing the good correlation property of such PN sequences. By combining three levels of estimations, which have different precisions and ranges, the proposed scheme can achieve accurate frequency estimation under different channel environment. Simulation results show that this approach performs well in both AWGN channels and multipath channels.

Keywords

AWGN channels; OFDM modulation; frequency estimation; multipath channels; random sequences; AWGN channels; OFDM systems; cyclic pseudorandom sequences; frequency-offset estimation; multipath channels; time domain PN sequences; time domain sequences; AWGN channels; Channel estimation; Fading; Frequency division multiplexing; Frequency estimation; Frequency modulation; Frequency synchronization; Multipath channels; OFDM modulation; Wireless communication; Correlation; OFDM; frequency estimation; time domain;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/TBC.2007.910924

Filename

4415273