Coarse frequency estimation in OFDM packet oriented systems

Author

Puig, P. Marti i ; Alvarez, J.S.

Author_Institution

Signal Theor. & Commun., Univ. of Vic, Spain

Volume

4

fYear

2001

fDate

2001

Firstpage

2337

Abstract

In this paper we derive a fast blind coarse frequency offset estimator for OFDM systems in frequency selective channels. The estimator takes advantage of the strong structure of the OFDM signal. In packet oriented systems, using the method of Schmild and Cox (see IEEE Trans. on Commun. vol.45, no.12, p.1613-21, Dec. 1997) for timing and fine frequency offset estimation, it is possible to obtain very accurate synchronization using only one known OFDM symbol transmitted at the beginning of the burst. In systems using a continuous stream of data this estimator can solve the ambiguity of multiples of the subcarrier spacing that produces a fine estimator based on cyclic extensions

Keywords

OFDM modulation; frequency estimation; packet radio networks; synchronisation; OFDM systems; fast blind coarse frequency offset estimator; fine offset estimation; frequency estimation; frequency selective channels; orthogonal frequency division multiplexing; packet oriented systems; subcarrier spacing; synchronization; timing estimation; Asynchronous transfer mode; Autocorrelation; Convolution; Digital video broadcasting; Frequency estimation; Frequency synchronization; Intersymbol interference; OFDM; Proposals; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on

Conference_Location

Salt Lake City, UT

ISSN

1520-6149

Print_ISBN

0-7803-7041-4

Type

conf

DOI

10.1109/ICASSP.2001.940468

Filename

940468