This paper presents a Turbo Multiuser Detector for Turbo-Coded DS-CDMA systems, based on the utilization of a PIC and a bank of turbo decoders, in which the PIC performs interference cancellation after each constituent decoder of the turbo decoding scheme. Moreover, the soft output of turbo decoders are used iteratively to improve the updating step of the channel parameter estimation which is formally equivalent to one step of the expection-maximization algorithm. By means of computer simulations, we will show that the proposed receiver achieves performance comparable with systems which suppose perfect channel parameters knowledge for medium to high system loads, in AWGN channel. These results are obtained also in satellite channel, for different values of the elevation angle.

Iterative PIC Detection and Channel Estimation for Satellite DS-CDMA Systems / S. Morosi; R. Fantacci; E. Del Re; P. Rufolo. - STAMPA. - (2004), pp. 1-6. (Intervento presentato al convegno European Wireless 2004 tenutosi a Barcellona nel Febbraio 2004).

Iterative PIC Detection and Channel Estimation for Satellite DS-CDMA Systems

MOROSI, SIMONE
;
FANTACCI, ROMANO;DEL RE, ENRICO;
2004

Abstract

This paper presents a Turbo Multiuser Detector for Turbo-Coded DS-CDMA systems, based on the utilization of a PIC and a bank of turbo decoders, in which the PIC performs interference cancellation after each constituent decoder of the turbo decoding scheme. Moreover, the soft output of turbo decoders are used iteratively to improve the updating step of the channel parameter estimation which is formally equivalent to one step of the expection-maximization algorithm. By means of computer simulations, we will show that the proposed receiver achieves performance comparable with systems which suppose perfect channel parameters knowledge for medium to high system loads, in AWGN channel. These results are obtained also in satellite channel, for different values of the elevation angle.
2004
Proceedings of 2004 European Wireless conference, 24 - 27 Feb. 2004, Barcelona, Spain.
European Wireless 2004
Barcellona
Febbraio 2004
S. Morosi; R. Fantacci; E. Del Re; P. Rufolo
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/356572
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