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Theses

Récepteurs itératifs pout systèmes multi-antennes

Abstract : The aim of this thesis is to study the association of multiple antenna (MIMO) transmission techniques with iterative receiver scheme for high data rate wireless communications.

Multiple antenna systems allows the throughput to be reliably increased with no bandwidth expansion nor performance degradation. When no channel state information is available at the transmit side, MIMO potentialities are generally exploited at the price of a complex receiver that can not be easily implemented a chip.

On the one hand, in order to deal with the frequency selectivity of the channel and thus in order to make the receiver less complex, multi-carrier OFDM modulation is efficiently combined with MIMO transmission scheme. On the other hand, by extending the turbo-equalization concept to the multiple antenna context, we study an iterative receive technique designed for MIMO-OFDM transmission. The equalization process is performed by using linear filters optimized under the MMSE criterion, leading to a reasonable complexity in accordance with implementation constraints.

The proposed receivers are then associated with complementary techniques like linear precoding or MC-CDMA. By well designing the transmission scheme, it is demonstrated that the receiver is able to take benefit from the whole diversity of the channel while exploiting the MIMO capacity in an optimal manner.

Performance results of different systems are finally carried out for several theoretical and realistic channels. Influence of spatial correlation and impact of the channel estimation are also studied. For all these contexts, comparisons with conventional systems show the interest of the iterative solution.
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https://tel.archives-ouvertes.fr/tel-00011415
Contributor : Pierre-Jean Bouvet <>
Submitted on : Wednesday, January 18, 2006 - 5:02:08 PM
Last modification on : Tuesday, July 21, 2020 - 10:14:02 AM
Long-term archiving on: : Saturday, April 3, 2010 - 9:32:25 PM

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  • HAL Id : tel-00011415, version 1

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Pierre-Jean Bouvet. Récepteurs itératifs pout systèmes multi-antennes. domain_stic.theo. INSA de Rennes, 2005. Français. ⟨tel-00011415⟩

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