NDLI: Turbo soft interference cancellation for coded asynchronous ds/cdma

Content Provider	Springer Nature Link
Author	Cances, J. P. Meghdadi, V. Mohammadkhani, G. R.
Copyright Year	2001
Abstract	In this paper we propose a Multiuser receiver architecture which removes the Multiple Access Interference (Mai) by means of a Soft Input Soft Output (siso) multiuser detector followed by a bank of channel decoders. The extrinsic information at the output of the channel decoders are used to estimate the values of the interfering bits and the SISO multiuser detector subtracts the vector of the interfering bits from the incoming signal. The resulting vector is then filtered by an adaptive mmse filter to help remove the residual mai. The paper examines the use of such a receiver in the context of a synchronous awgn channel and then we generalize to the case of asynchronous multipath fading channels.Dans cet article nous étudions la structure d’un récepteur multiutilisateurs qui élimine le brouillage d’accès multiple à l’aide d’un détecteur multiutilisateurs à sorties pondérées suivi d’un bane de décodeurs de canal. L’information extrinsèque en sortie de chaque décodeur de canal est utilisée pour estimer la valeur des bits brouilleurs et le détecteur multiutilisateurs retranche le vecteur des bits brouilleurs au signal d’entrée. Unfiltrage adaptatif selon les moindres carres est alors appliqué pour éliminer le brouillage d’accès multiple rèsiduel. Nous examinons l’implantation de ce récepteur dans les contextes d’un système synchrone à bruit additif gaussien et d’un système asynchrone à trajets multiples.
Starting Page	422
Ending Page	434
Page Count	13
File Format	PDF
ISSN	00034347
Journal	Annales Des Télécommunications
Volume Number	56
Issue Number	7-8
e-ISSN	19589395
Language	French
Publisher	Springer-Verlag
Publisher Date	2001-01-01
Publisher Place	Paris
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Radiocommunication service mobile Réseau cellulaire Accès multiple code Spectre étalé séquence directe Détection multicanal Brouillage signal Propagation trajet multiple Evanouissement Rayleigh Code convolutif Turbocode Communications Engineering, Networks Information Systems and Communication Service Signal, Image and Speech Processing Computer Communication Networks Information and Communication, Circuits R & D/Technology Policy
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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