The new approach to mitigate MAI in MC-CDMA systems

Author

Kim, Dong-Joo ; Kim, Joo-Eung ; Kang, Chang-Eon

Author_Institution

Dept. of Electron. Eng., Yonsei Univ., Seoul, South Korea

Volume

1

fYear

1999

fDate

1999

Firstpage

171

Abstract

An MC-CDMA using a blind interference cancellation (IC) scheme based on linearly constrained constant modulus algorithm (LCCMA) is proposed as a method for mitigating the effect of multiple access interference. An IC scheme using the constant modulus algorithm (CMA) cannot converge fast enough to yield satisfactory performance in a fading channel. Therefore the RLS-type CMA is used in place of a conventional CMA. Finally, the hybrid type of LCCMA is proposed. Simulations were performed for different number of users and paths, and results show that the proposed MC-CDMA system outperforms the conventional MC-CDMA system

Keywords

OFDM modulation; Rayleigh channels; code division multiple access; interference suppression; land mobile radio; least squares approximations; multiuser channels; radio links; radiofrequency interference; recursive estimation; LCCMA; MAI; OFDM-CDMA; RLS-type CMA; Rayleigh fading channel; blind algorithm; blind interference cancellation; constant modulus algorithm; downlink; hybrid LCCMA; linearly constrained constant modulus algorithm; multiple access interference; simulations; uplink; Downlink; Equalizers; Fading; Frequency diversity; Hardware; Interference cancellation; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.797086

Filename

797086