Decision feedback partial parallel interference cancellation for DS-CDMA

Author

Li, Yue-heng ; Chen, Ming ; Cheng, Shi-xin

Author_Institution

Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China

Volume

1

fYear

2000

fDate

2000

Firstpage

579

Abstract

A decision feedback partial parallel interference cancellation (DF-PPIC) is proposed. In each stage´s interference cancellation, the already detected bits at the output of the current stage are fed back to regenerate the estimation of the interference, thus the detection of the remaining bits in the same stage is improved. In the linear soft decision case, this can be deduced by the successive over-relaxation (SOR) iterative implementation of linear multiuser detection. Simulation results show that the proposed DF-PPIC outperforms the conventional Divsalar et al.´s (see IEEE Trans. Commun., vol.46, no.2, p.258-68, 1998) PPIC

Keywords

code division multiple access; feedback; interference suppression; iterative methods; multiuser channels; radio receivers; radiofrequency interference; signal detection; spread spectrum communication; AWGN; DS-CDMA; additive white Gaussian noise; decision feedback partial parallel interference cancellation; interference estimation; iterative implementation; linear multiuser detection; linear multiuser receivers; linear soft decision; multiuser interference; nonlinear successive decision feedback detector; simulation results; successive over-relaxation; AWGN; Additive white noise; Decorrelation; Detectors; Equations; Feedback; Gaussian noise; Interference cancellation; Multiaccess communication; Multiuser detection;

fLanguage

English

Publisher

ieee

Conference_Titel

MILCOM 2000. 21st Century Military Communications Conference Proceedings

Conference_Location

Los Angeles, CA

Print_ISBN

0-7803-6521-6

Type

conf

DOI

10.1109/MILCOM.2000.905029

Filename

905029