DocumentCode :
3007061
Title :
Adaptive multistage parallel interference cancellation for CDMA over multipath fading channels
Author :
Xue, Guoqiang ; Weng, Jianfeng ; Le-Ngoc, Tho ; Tahar, Sofiéne
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
Volume :
2
fYear :
1999
fDate :
36342
Firstpage :
1251
Abstract :
In this paper, we propose an adaptive multistage parallel interference cancellation (PIC) structure for multipath fading channels. Similarly to the previous partial interference cancellation (IC) approach suggested in Divsalar et al. (1998), only part of the multiaccess interference (MAI) estimate is canceled at each stage. However, the weights employed in this proposed scheme are derived from an LMS algorithm which tries to minimize the mean-square error between the actual signal received and its replica. The complexity of the proposed adaptive multistage PIC scheme is much lower than that of linear multiuser detectors. Performance of the proposed structure in single-path Rician and multipath Rayleigh fading channels is evaluated by simulations. Our results show that the proposed technique outperforms the existing interference cancellation methods in multipath fading channels
Keywords :
Rayleigh channels; adaptive signal processing; code division multiple access; interference suppression; least mean squares methods; multipath channels; receivers; CDMA; adaptive multistage parallel interference cancellation; mean-square error; multiaccess interference; multipath Rayleigh fading channels; multipath fading channel; single-path Rician channels; Detectors; Fading; Interference cancellation; Least squares approximation; Maximum likelihood detection; Maximum likelihood estimation; Multiaccess communication; Multiple access interference; Multiuser detection; Rician channels;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
ISSN :
1090-3038
Print_ISBN :
0-7803-5565-2
Type :
conf
DOI :
10.1109/VETEC.1999.780548
Filename :
780548
Link To Document :
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