OFDM time and frequency synchronization by spread spectrum pilot technique

Author

Tufvesson, Fredrik ; Faulkne, Mike ; Hoeher, Peter ; Edfors, Ove

Author_Institution

Dept. of Appl. Electron., Lund Univ., Sweden

fYear

1999

fDate

6-10 Jun 1999

Firstpage

115

Lastpage

119

Abstract

Correct time and frequency synchronization is important for the performance of orthogonal frequency division multiplex (OFDM) systems. We evaluate a system where a pseudonoise sequence (PN-sequence) is used for estimation of these synchronization parameters. The PN-sequence is superimposed on the OFDM signal. The system is evaluated by means of the variance of the frequency estimation error and the probability for correct timing synchronization. Both theoretical and simulated results are presented. The proposed technique is very flexible and works also at low signal to noise ratios. The frequency offset range has been significantly increased compared to conventional OFDM synchronizer schemes

Keywords

OFDM modulation; error analysis; frequency estimation; probability; pseudonoise codes; sequences; spread spectrum communication; synchronisation; timing; OFDM signal; PN-sequence; SNR; code sequence; correct timing synchronization probability; frequency estimation error; frequency offset range; frequency synchronization; low signal to noise ratio; orthogonal frequency division multiplex; pseudonoise sequence; simulated results; spread spectrum pilot technique; synchronization parameters estimation; system performance; time synchronization; variance; Bandwidth; Demodulation; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Informatics; OFDM; Signal to noise ratio; Spread spectrum communication; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Theory Mini-Conference, 1999

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-5653-5

Type

conf

DOI

10.1109/CTMC.1999.790248

Filename

790248