A new approach for symbol frame synchronization and carrier frequency estimation in OFDM communications

Author

Gunther, Jacob H. ; Liu, Hui ; Swindlehurst, A. Lee

Author_Institution

Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT, USA

Volume

5

fYear

1999

fDate

1999

Firstpage

2725

Abstract

This work considers the problem of jointly estimating symbol frame boundaries and carrier frequency offsets for orthogonal frequency division multiplexed (OFDM) communications in frequency selective fading environments. Orthogonality between the modulated and virtual carriers over an interference free window of the received signal is used to develop an algorithm for estimating the carrier frequency offset and detecting the beginning of a symbol frame. By using a cyclic prefix to remove interference from neighboring frames, the the method is applicable in the presence of dispersive channels. The main contribution of this work is the joint estimation of the frequency offset and the frame boundary

Keywords

OFDM modulation; dispersive channels; fading channels; frequency estimation; interference suppression; synchronisation; OFDM communications; carrier frequency estimation; carrier frequency offsets; cyclic prefix; dispersive channels; frequency selective fading environments; interference free window; modulated carriers; orthogonal frequency division multiplexed communications; symbol frame; symbol frame boundaries; symbol frame synchronization; virtual carriers; Demodulation; Fading; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Interference; Jacobian matrices; OFDM modulation; Oscillators; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on

Conference_Location

Phoenix, AZ

ISSN

1520-6149

Print_ISBN

0-7803-5041-3

Type

conf

DOI

10.1109/ICASSP.1999.761307

Filename

761307