Analysis of different Pseudo-Random and orthogonal spreading sequences in DS-CDMA

Author

Ziani, Ahmed ; Medouri, Abdellatif

Author_Institution

Inf. Syst. & Telecommun. Lab., Abdelmalek Essaadi Univ., Tetuan, Morocco

fYear

2012

fDate

10-12 May 2012

Firstpage

558

Lastpage

564

Abstract

Pseudo-Random or pseudo-noise and Orthogonal Spreading sequences are widely used in the Wideband Code Division Multiple Access (WCDMA) systems using Rake receiver. This paper shows the theoretical aspect for direct sequences DS-CDMA systems and reviews the main characteristics of the maximal length, Gold, barker and Kasami sequences, also the variable and fixed-length orthogonal codes are discussed. Finally, comparisons between these methods is given by using autocorrelation, cross-correlation functions, The mean square aperiodic auto-correlation (MSAAC), the mean square aperiodic cross-correlation (MSACC) measures and the Merit factor (MF).

Keywords

code division multiple access; mean square error methods; orthogonal codes; radio receivers; random sequences; spread spectrum communication; DS-CDMA; Kasami sequence; Rake receiver; WCDMA system; barker sequence; direct sequence systems; fixed-length orthogonal codes; gold sequence; maximal length sequence; mean square aperiodic auto-correlation; mean square aperiodic cross-correlation; merit factor; orthogonal spreading sequences; pseudonoise spreading sequences; pseudorandom spreading sequences; variable orthogonal codes; wideband code division multiple access system; Bandwidth; Correlation; Error correction; Error correction codes; Generators; Gold; Multiaccess communication; DS-CDMA; WCDMA; auto-correlation; cross-correlation; merit factor; orthogonal codes; pseudo-noise codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia Computing and Systems (ICMCS), 2012 International Conference on

Conference_Location

Tangier

Print_ISBN

978-1-4673-1518-0

Type

conf

DOI

10.1109/ICMCS.2012.6320321

Filename

6320321