An original turbo multiuser detector for overloaded coded DS-CDMA systems is presented and studied; the performance of the proposed system is tested by Monte Carlo simulations and by means of the density evolution theory. The turbo-MUD receiver is based on the use a combination of a linear MMSE detector in the first stage and an interference cancellation scheme in the successive ones. The inputs of both receivers are the soft information from a bank of turbo decoders. The performance of the proposed receiver can be effectively predicted in overloaded communication systems by means of the density evolution technique; the use of this technique also permits the proper number of MMSE iterations to be evaluated, making the design of the receiver easier.
Design of Turbo-MUD Receivers with Density Evolution in Overloaded CDMA Systems / Morosi, Simone; DEL RE, Enrico; Fantacci, Romano; Chiassai, A.. - STAMPA. - (2005), pp. 315-319. (Intervento presentato al convegno IEEE WCNC 2005 tenutosi a New Orleans nel Marzo 2005).
Design of Turbo-MUD Receivers with Density Evolution in Overloaded CDMA Systems
MOROSI, SIMONE;DEL RE, ENRICO;FANTACCI, ROMANO;
2005
Abstract
An original turbo multiuser detector for overloaded coded DS-CDMA systems is presented and studied; the performance of the proposed system is tested by Monte Carlo simulations and by means of the density evolution theory. The turbo-MUD receiver is based on the use a combination of a linear MMSE detector in the first stage and an interference cancellation scheme in the successive ones. The inputs of both receivers are the soft information from a bank of turbo decoders. The performance of the proposed receiver can be effectively predicted in overloaded communication systems by means of the density evolution technique; the use of this technique also permits the proper number of MMSE iterations to be evaluated, making the design of the receiver easier.File | Dimensione | Formato | |
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Design of Turbo-MUD Receivers with Density Evolution in Overloaded CDMA Systems.pdf
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