BEM-based multiuser detection for synchronous DS-CDMA systems over frequency flat fading channels

Author

Gallo, A.S. ; Chiavaccini, E. ; Vitetta, G.M.

Author_Institution

Dept. of Inf. Eng., Modena Univ., Italy

Volume

3

fYear

2002

fDate

15-18 Sept. 2002

Firstpage

1285

Abstract

A soft-input soft-output (SISO) multiuser detection algorithm for synchronous direct sequence-code division multiple access (DS-CDMA) systems operating over a slow Rayleigh fading channel is illustrated. Its derivation is based on the Bayesian expectation maximization (BEM) technique. The proposed detector estimates the fading channel in an iterative fashion and produces the a posteriori probabilities (APPs) of the transmitted symbols. Its error performance is assessed by computer simulation and is compared with that provided by other multiuser detectors.

Keywords

Bayes methods; Rayleigh channels; channel estimation; code division multiple access; error statistics; iterative methods; maximum likelihood estimation; multiuser detection; optimisation; probability; spread spectrum communication; Bayesian expectation maximization; Rayleigh fading channel; a posteriori probabilities; channel estimation; flat fading channels; iterative estimation; maximum likelihood estimation; multiuser detection; soft-input soft-output detection; synchronous DS-CDMA; synchronous direct sequence-code division multiple access; Bayesian methods; Chirp modulation; Covariance matrix; Detection algorithms; Detectors; Fading; Frequency estimation; Gaussian noise; Multiaccess communication; Multiuser detection;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on

Print_ISBN

0-7803-7589-0

Type

conf

DOI

10.1109/PIMRC.2002.1045236

Filename

1045236