Title :
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
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;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.797086
