Improved ISDIC-OSC for parallel interference cancellation

Author

Vanhaverbeke, F. ; Moeneclaey, M.

Author_Institution

Ghent Univ., Gent, Belgium

Volume

1

fYear

2003

fDate

20-20 March 2003

Firstpage

564

Abstract

A parallel interference cancellation scheme, based on the iterated soft decision interference cancellation with optimized soft cancellation (ISDIC-OSC) procedure is improved dramatically by replacing the a priori probabilities in every stage of the cancellation process by the a posteriori probabilities of the previous stage. The introduction of a forgetting factor results in an additional gain in acceptable load. With this multiuser detector, loads close to unity can be achieved for PN-CDMA without significant loss as compared to the single user performance for a spreading factor of 256. Over a wide range of spreading factors, loads of about twice the acceptable load of the original ISDIC-OSC detector can be achieved with this refined detector.

Keywords

code division multiple access; interference suppression; iterative methods; multiuser detection; probability; pseudonoise codes; a posteriori probabilities; a priori probabilities; forgetting factor; improved ISDIC-OSC; iterated soft decision interference cancellation; multiuser detector; optimized soft cancellation; parallel interference cancellation scheme; single user performance; spreading factor; AWGN channels; Decorrelation; Delay; Detectors; Interference cancellation; Matched filters; Multiaccess communication; Multiuser detection; Performance loss; Silicon carbide;

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.2003.1200411

Filename

1200411