Title :
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
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;
Conference_Titel :
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
Print_ISBN :
0-7803-7632-3
DOI :
10.1109/GLOCOM.2002.1188196
