Title :
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
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;
Conference_Titel :
MILCOM 2000. 21st Century Military Communications Conference Proceedings
Conference_Location :
Los Angeles, CA
Print_ISBN :
0-7803-6521-6
DOI :
10.1109/MILCOM.2000.905029
