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Turbo processing in transmit antenna diversity systems

Turbo-traitement dans des systèmes À diversité d’antennes d’émission

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Abstract

We consider turbo-trellis-coded transmission over fading multiple-input-multiple-output (M1M0) channels with transmit diversity using space-time block codes. We give a new view on space-time block codes as a transformation of the fading MIMO channel towards a Gaussian single-input-single-output (siso) channel and provide analytical results on the BER of space-time block codes. Furthermore, we describe the concatenation of Turbo-TCM with a space-time block code and show that in addition to the transmit diversity substantial benefits can be obtained by turbo iterations as long as the channel is time-varying during transmission of a coded block or frequency hopping is applied. Finally, a double iterative scheme for turbo equalization and turbo decoding of the concatenation of Turbo-TCM and space-time block code in frequency-selective MIMO channels is described.

Résumé

Nous considérons une transmission codée en treillis de type turbo sur des canaux à évanouissements multi-entrées multi-sorties (MIMO), utilisant une diversité d’émission réalisée par des codes en blocs spatio-temporels. Nous proposons une nouvelle conception des codes en blocs spatio-temporels comme une transformation du canal MIMO à évanouissements en un canal de Gauss mono-entrée mono-sortie et nous fournissons des résultats analytiques sur les taux d’erreurs binaires des codes en blocs spatiotemporels. De plus, nous décrivons la concaténation d’une modulation codée en treillis de type turbo et d’un code en bloc spatio-temporel et nous montrons qu ’en plus de la diversité d’émission, des gains non négligeables peuvent être obtenus par des itérations turbo, tant que le canal varie dans le temps durant la transmission d’un bloc codé ou qu’un saut de fréquence est appliqué. Enfin, un schéma doublement itératif pour la turbo égalisation et le turbo décodage de la concaténation d’une modulation codée en treillis de type turbo et d’un code en bloc spatio-temporel sur des canaux MIMO sélectifs en fréquences est décrit.

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Authors and Affiliations

  1. G. Bauch and J. Hagenauer are with the Institute for Communications Engineering, Munich University of Technology, Germany

    Gerhard Bauch & Joachim Hagenauer

  2. N. Seshadri is with Broadcom Corporation, California, USA

    Nambi Seshadri

Authors
  1. Gerhard Bauch
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  2. Joachim Hagenauer
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  3. Nambi Seshadri
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Correspondence to Gerhard Bauch or Joachim Hagenauer.

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Bauch, G., Hagenauer, J. & Seshadri, N. Turbo processing in transmit antenna diversity systems. Ann. Télécommun. 56, 455–471 (2001). https://doi.org/10.1007/BF02995456

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