A new multi-stage weighted interference cancellation multiuser detector with user ordering for DS-CDMA

Author

Hsu, Chen-Chu ; Lee, Yumin

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

1

fYear

2003

fDate

20-20 March 2003

Firstpage

595

Abstract

Conventional multi-stage multi-user detectors (MUD) such as the parallel interference cancellation (PIC) MUD suffer from error propagation. In this paper, we propose a new multi-stage MUD in which reliability weighting factors are applied to reduce error propagation. An algorithm is derived for optimizing both the reliability weighting factors and decision order for the proposed structure. Simulation results show that the proposed MUD almost achieves the single user bound with just a few stages.

Keywords

code division multiple access; interference suppression; multiuser detection; radio receivers; radiofrequency interference; spread spectrum communication; DS-CDMA; error propagation reduction; multistage multiuser detector; parallel interference cancellation multiuser detector; reliability weighting factor; single user bound; user ordering; weighted interference cancellation multistage detector; wireless receiver; AWGN; Additive white noise; Detectors; Gaussian noise; Interference cancellation; Matched filters; Multiaccess communication; Multiple access interference; Multiuser detection; Noise cancellation;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE

Conference_Location

New Orleans, LA, USA

ISSN

1525-3511

Print_ISBN

0-7803-7700-1

Type

conf

DOI

10.1109/WCNC.2003.1200417

Filename

1200417