A new pilot assisted frequency synchronization for wireless OFDM systems

Author

Lei, Wen ; Lu, Jianhua ; Gu, Jun

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

Volume

4

fYear

2003

fDate

6-10 April 2003

Abstract

A new frequency offset synchronization algorithm is proposed for OFDM systems over time varying multipath fading channels. This algorithm employs pilot symbols embedded in data symbols to estimate the frequency offset. In particular, a fine frequency offset estimate is achieved by properly combining frequency-offset estimates from pilots over different frequency locations. Moreover, the effects of time varying channels and the number of sub-carriers are analyzed and the rule for the selection of the number of OFDM symbols used for the synchronization algorithm is given. Simulations are conducted to demonstrate the effectiveness of the proposed scheme.

Keywords

OFDM modulation; fading channels; frequency estimation; multipath channels; synchronisation; time-varying channels; fading channels; frequency offset estimation; frequency offset synchronization algorithm; multipath channels; pilot assisted frequency synchronization; time varying channels; wireless OFDM systems; Algorithm design and analysis; Digital audio broadcasting; Doppler shift; Fading; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; OFDM; Wireless LAN; Wireless sensor networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-7663-3

Type

conf

DOI

10.1109/ICASSP.2003.1202739

Filename

1202739