Skip to Main content Skip to Navigation
Theses

Conception et réalisation d'un système de Télécommunications MIMO avec Formation Numérique de Faisceaux en réception ; Calibrage aveugle du Démodulateur triphasé Zéro-IF et comparaison au démodulateur classique à 2 voies I et Q.

Abstract : Within the framework of this research work, we have interested to a MIMO (Multiple Input Multiple Output) telecommunication system using the spatial multiplexing, Zero-IF receptors and the digital beamforming technique. The first part in this work is consecrated to a comparative study between two different kinds of Zero-IF demodulators: the classical IQ demodulator and the five-port and three-phase one. This study has allowed to highlight the three dimensional aspect of five-port and three-phase demodulators, to win up to 20dB in terms of rejection of inter-modulation product. Also this three dimensional aspect discovery help us to find a new blind calibration method. The second part of this thesis focuses on the prototyping of a MIMO system. This phase has allowed us to set the difficulties of the implementation of this systems kind and to highlight new problematics that don't appear beforehand in mono-transceiver system. Moreover, a beamforming algorithm was developed in this part. This digital beamfoming has permit to increase the capacity as well as the quality of link when considering the MIMO system as N parallel SIMO systems. Compared to the ZF (Zero Forcing technique), we have proved that the beamforming permit the achievement a better signal quality for lower values of the signal to noise ratio.
Complete list of metadatas

Cited literature [98 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/tel-00409794
Contributor : Kais Mabrouk <>
Submitted on : Wednesday, August 12, 2009 - 11:22:38 PM
Last modification on : Friday, July 31, 2020 - 10:44:05 AM
Long-term archiving on: : Tuesday, June 15, 2010 - 10:23:35 PM

Identifiers

  • HAL Id : tel-00409794, version 1

Collections

Citation

Kais Mabrouk. Conception et réalisation d'un système de Télécommunications MIMO avec Formation Numérique de Faisceaux en réception ; Calibrage aveugle du Démodulateur triphasé Zéro-IF et comparaison au démodulateur classique à 2 voies I et Q.. Sciences de l'ingénieur [physics]. Télécom ParisTech, 2008. Français. ⟨tel-00409794⟩

Share

Metrics

Record views

903

Files downloads

16870