A time synchronization scheme for quasi-synchronous up-link of MC-CDMA systems

Author

Hassan, Asif

fYear

2003

fDate

14-17 Dec. 2003

Firstpage

371

Lastpage

374

Abstract

We propose a new method for time synchronization or time delay estimation in quasi-synchronous up link of multi-carrier code division multiple access (MC-CDMA) systems. The method is cyclic prefix based and estimates the average time delay of multipath multiuser signals. Position of cyclic prefix correlation peaks is estimated using a low complexity algorithm, which exploits the fact that these peaks exist in periodic fashion with a period equal the MC-CDMA frame length. This approach allows the fast Fourier transform (FFT) window placement at a fixed distance from the estimated time delay avoiding any intersymbol interference (ISI) users.

Keywords

code division multiple access; computational complexity; delay estimation; fast Fourier transforms; interference suppression; intersymbol interference; mobile radio; radio links; synchronisation; MC-CDMA systems; cyclic prefix correlation; fast Fourier transform window placement; intersymbol interference; multicarrier code division multiple access; multipath multiuser signals; quasisynchronous up-link; time delay estimation; time synchronization scheme; Bandwidth; Delay effects; Delay estimation; Fast Fourier transforms; Frequency synchronization; Intersymbol interference; Multiaccess communication; Multicarrier code division multiple access; OFDM; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Information Technology, 2003. ISSPIT 2003. Proceedings of the 3rd IEEE International Symposium on

Print_ISBN

0-7803-8292-7

Type

conf

DOI

10.1109/ISSPIT.2003.1341135

Filename

1341135