Performance comparison between MC-CDMA and DS-CDMA for broadband wireless transmissions

Author

Des Noës, M. ; Kténas, D.

Author_Institution

CEA-LETI, Grenoble, France

Volume

3

fYear

2004

fDate

17-19 May 2004

Firstpage

1441

Abstract

This article presents a comparison between DS-CDMA and MC-CDMA systems. The objective is to evaluate these two access techniques with similar assumptions (such as bandwidth, radio channel, number of users), and with the same kind of receivers (MRC, sub-optimal and optimal MMSE). A MC-CDMA system can be viewed as a DS-CDMA system that uses complex codes instead of binary ones. Intuitively, we expect to obtain the same level of performance. Using random matrix theory, it is possible to demonstrate that both systems offer the same performance as long as the spreading factor is sufficiently large (SF>16 typically). Simulation results confirm the accuracy of the asymptotic SINR and also that both techniques offer the same performance.

Keywords

binary codes; channel coding; code division multiple access; least mean squares methods; radio receivers; spread spectrum communication; DS-CDMA; MC-CDMA; MRC receivers; asymptotic SINR; binary codes; broadband wireless transmissions; channel coding; complex codes; optimal MMSE receivers; radio channel bandwidth; random matrix theory; spreading factor; suboptimal receivers; Bandwidth; Detectors; Fading; Maximum likelihood detection; Maximum likelihood estimation; Multiaccess communication; Multicarrier code division multiple access; Multipath channels; RAKE receivers; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th

ISSN

1550-2252

Print_ISBN

0-7803-8255-2

Type

conf

DOI

10.1109/VETECS.2004.1390491

Filename

1390491