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.
BEM-based multiuser detection for synchronous DS-CDMA systems over frequency flat fading channels / Gallo, Antonio Stanislao; Chiavaccini, Eugenio; Vitetta, Giorgio Matteo. - STAMPA. - 3:(2002), pp. 1285-1289. (Intervento presentato al convegno 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2002 tenutosi a Lisboa, prt nel 15-18 Sept.) [10.1109/PIMRC.2002.1045236].
BEM-based multiuser detection for synchronous DS-CDMA systems over frequency flat fading channels
GALLO, Antonio Stanislao;CHIAVACCINI, Eugenio;VITETTA, Giorgio Matteo
2002
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.
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