Timing Synchronisation for OFDM-WLANs with Time Averaging Scheme

Author

Tan, Ying ; Leyonhjem, Scott ; Faulkner, Mike

Author_Institution

Centre for Telecommun. & MicroElectron., Victoria Univ., Melbourne, Vic.

Volume

4

fYear

2006

fDate

7-10 May 2006

Firstpage

1942

Lastpage

1946

Abstract

The IEEE 802.11 wireless local area network (WLAN) standard is based on random access, such that the receiver does not know exactly when a packet starts. The conventional maximum likelihood (ML) method to packet detection and time synchronisation is based on the auto and cross correlation functions. Its performance suffers from multipath channel fading in low SNR scenarios. In this paper a robust synchronisation scheme exploits the time averaging technique based only on the short training sequence (STS). The paper also investigates the effect of cyclic delay diversity (CDD) introduced by multiple antenna transmission and presents a comparison with the maximum likelihood (ML) method to time synchronisation

Keywords

OFDM modulation; diversity reception; fading channels; maximum likelihood estimation; multipath channels; synchronisation; wireless LAN; IEEE 802.11; OFDM; WLAN; cyclic delay diversity; maximum likelihood method; multipath channel fading; multiple antenna transmission; random access; short training sequence; time averaging scheme; timing synchronisation; wireless local area network; Delay effects; Digital video broadcasting; Frequency synchronization; Maximum likelihood detection; OFDM; Robustness; Sociotechnical systems; Timing; Transmitting antennas; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd

Conference_Location

Melbourne, Vic.

ISSN

1550-2252

Print_ISBN

0-7803-9391-0

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2006.1683185

Filename

1683185