An algebraic approach to blind carrier offset and code timing estimation for DS-CDMA systems

Author

Amleh, Khaled ; Li, Hongbin

Author_Institution

Dept. of Electr. & Comput. Eng., Stevens Inst. of Technol., Hoboken, NJ, USA

Volume

10

Issue

2

fYear

2003

Firstpage

32

Lastpage

34

Abstract

This paper presents a blind method for joint carrier offset and code timing estimation in direct-sequence code-division multiple-access systems. The proposed method is arrived at by exploiting the subspace structure of the observed signal along with analytical tools of polynomial matrices. It yields an algebraic solution which avoids a multidimensional search over the parameter space, a procedure that is computationally involved and often suffers local convergence. The proposed method is multiaccess interference resistant. Furthermore, it can be used in time-varying, multipath fading channels.

Keywords

code division multiple access; multiuser channels; polynomial matrices; radiofrequency interference; spread spectrum communication; timing; DS-CDMA systems; algebraic solution; blind carrier offset estimation; code timing estimation; direct-sequence code division multiple access; local convergence; multiaccess interference resistant method; multipath fading channels; parameter space; polynomial matrices; subspace structure; time-varying channels; Baseband; Delay; Fading; Frequency estimation; Frequency synchronization; Intersymbol interference; Multiaccess communication; Multidimensional systems; Multiple access interference; Timing;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2002.807874

Filename

1179829