Fast synchronization method for CDMA communication systems

Author

Burshtein, David ; Rainish, Doron ; Shamai, Shlomo ; Ben-Eli, David

Author_Institution

Dept. of Electr. Eng. Syst., Tel Aviv Univ., Israel

Volume

19

Issue

12

fYear

2001

fDate

12/1/2001 12:00:00 AM

Firstpage

2396

Lastpage

2405

Abstract

The synchronization phase of a code division multiple access communication system might pose a limitation on the performance of the system, since unlike other communication systems it is required to obtain the state (i.e., sequence phase) of a linear feedback shift register (LFSR). Usually the state is obtained by using a brute force exhaustive search over all possibilities, which might be a computationally demanding task. In this paper, we suggest a new method for LFSR sequence phase acquisition. Our method is suitable for practical systems in which an unknown frequency drift may be present. Simulation results for the IS-95/CDMA-2000 standard show a dramatic reduction in the time required to acquire synchronization when using the new algorithm compared to the standard synchronization method

Keywords

binary sequences; cellular radio; code division multiple access; synchronisation; CDMA communication systems; IS-95/CDMA-2000 standard; LFSR; division multiple access communication system; fast synchronization method; linear feedback shift register; mobile radio; sequence phase; Block codes; Communication standards; Computational modeling; Frequency synchronization; Helium; Linear feedback shift registers; Maximum likelihood decoding; Multiaccess communication; Phase modulation; Quadrature phase shift keying;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.974605

Filename

974605