An adaptive full parallel interference canceller with imperfect channel estimation for CDMA systems

Author

Huang, Ymg-Fa ; Wen, Jyh-horng

Author_Institution

Graduate Inst. of Networking & Commun. Eng., Chaoyang Univ. of Technol., Taichung, Taiwan

fYear

2005

fDate

2005

Firstpage

707

Lastpage

712

Abstract

In this paper, we investigate the performance of an adaptive full parallel interference cancellation (FPIC) multiuser detection scheme based on the least mean square (LMS) algorithm for direct-sequence code-division multiple-access (DS-CDMA) communication systems. Simulation results show that the proposed FPIC multiuser detector outperforms the NLMS-based partial PIC (NLMS-PPIC) scheme over flat fading channels under imperfect channel estimation. Moreover, over a two-path frequency selective fading channel, the proposed adaptive FPIC detector is superior to the NLMS-PPIC and shows the effective cancellation of the multiple access interference (MAI) even with moderate channel estimation errors.

Keywords

channel estimation; code division multiple access; fading channels; least mean squares methods; multiuser detection; spread spectrum communication; DS-CDMA communication systems; NLMS-PPIC; NLMS-based partial PIC; adaptive full parallel interference canceller; direct-sequence code-division multiple-access; fading channels; imperfect channel estimation; least mean square algorithm; multiple access interference; multiuser detection; two-path frequency selective fading channel; AWGN; Amplitude estimation; Channel estimation; Degradation; Detectors; Fading; Interference cancellation; Least squares approximation; Multiaccess communication; Multiple access interference;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer and Information Science, 2005. Fourth Annual ACIS International Conference on

Print_ISBN

0-7695-2296-3

Type

conf

DOI

10.1109/ICIS.2005.24

Filename

1515392