DS-CDMA Iterative Multiuser Detection and turbo decoding

Ali Al Housseini (1) , Samir Saoudi (1) , Thierry Chonavel (1) , Mahmoud Ammar (1)

1 SC - Département Signal et Communications

In this paper we consider turbo-coded multi-user DS-CDMA communications. We first present a new scheme for Soft-Input Soft-Output multi-user detection. Our method pro-vides the Maximum A Posteriori estimate for each user bit together with its fiability in the form of an extrinsic informa-tion. It is based on the stack algorithm over the tree diagram of the CDMA channel. The Soft-Input Soft-Output multi-user detector is then associated to a bank of turbo-decoders in a global turbo loop to perform iteratively multi-user detec-tion and turbo-decoding. Simulation results show the high efficiency of the proposed method.

Mots clés: Turbo code

Domaines: Traitement du signal et de l'image [eess.SP]

Ali Al Housseini, Samir Saoudi, Thierry Chonavel, Mahmoud Ammar. DS-CDMA Iterative Multiuser Detection and turbo decoding. CIMNA (Congres International sur les Modélisations Numériques appliquées) - novembre 2003 - Beyrouth (Liban), Nov 2003, Beyrouth, Liban. ⟨hal-02128686⟩