Enhanced OFDM time and frequency synchronization through optimal code correlation

Author

Liu, Dongfang ; Chung, Jong-Moon

Author_Institution

Sch. of Electr. & Comput. Eng., Oklahoma State Univ., Stillwater, OK, USA

Volume

1

fYear

2002

fDate

4-7 Aug. 2002

Abstract

A pseudo-random noise (PN)-sequence synchronization method is proposed for orthogonal frequency division multiplexing (OFDM) time and frequency synchronization. By using two PN-sequences as the OFDM training symbols, all synchronizations can be accurately achieved. The peak correlation property of the PN-sequence makes time synchronization much more robust and accurate. Frequency synchronization precision is improved by averaging over the whole PN-sequence. At the same time, this method has it large frequency synchronization range. Finally, the residue time offset is estimated into the channel response.

Keywords

OFDM modulation; channel estimation; correlation methods; pseudonoise codes; random sequences; synchronisation; channel response; frequency synchronization; optimal code correlation; orthogonal frequency division multiplexing; pseudo-random noise sequence; residue time offset; time synchronization; training symbol; Broadband communication; Data communication; Fading; Frequency domain analysis; Frequency estimation; Frequency synchronization; Laboratories; Noise robustness; OFDM; Training data;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. MWSCAS-2002. The 2002 45th Midwest Symposium on

Print_ISBN

0-7803-7523-8

Type

conf

DOI

10.1109/MWSCAS.2002.1187185

Filename

1187185