On the assignment of Walsh and quasi-orthogonal codes in a multicarrier DS-CDMA system with multiple classes of users

Author

Amadei, M. ; Manzoli, U. ; Merani, M.L.

Author_Institution

Dept. of Inf. Eng., Univ. of Modena & Reggio Emilia, Italy

Volume

1

fYear

2002

fDate

17-21 Nov. 2002

Firstpage

841

Abstract

Several code allocation policies, suitable for the forward link of a multicarrier DS-CDMA mobile radio system that employs Walsh and quasi-orthogonal sequences, are proposed. Their effect on system performance is evaluated in the presence of a single class of users, as well as when transmissions of different data rates are supported, owing to the adoption of the variable spreading factor technique.

Keywords

3G mobile communication; code division multiple access; codes; multiuser channels; radio links; sequences; spread spectrum communication; IMT2000; Walsh codes; Walsh sequences; cdma2000; code allocation policies; data rates; forward link; mobile radio system; multicarrier DS-CDMA system; quasi-orthogonal codes; quasi-orthogonal sequences; synchronous downlink; system performance; third generation air interface specification; third generation mobile radio systems; variable spreading factor; Decision support systems; Error analysis; Error probability; Fading; Frequency; Land mobile radio; Multiaccess communication; Physical layer; Proposals; System performance;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE

Print_ISBN

0-7803-7632-3

Type

conf

DOI

10.1109/GLOCOM.2002.1188196

Filename

1188196