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- W203960236 abstract "Extensive research has been carried out these last few years on the single-user MIMO STBC design using advanced algebraic tools, namely cyclic division algebra. Families of single-user codes have been carefully constructed to achieve the DMT of the MIMO channel. Motivated by the promising results obtained in the single-user scenario, the aim of this thesis is to construct new families of multi-user STBCs. Multi-user MIMO (MU-MIMO) channels have recently attracted considerable attention because of its essential practical implication in today’s and future communication systems. The current study focuses on MIMO MAC where multiple users communicate with one receiver. A coherent communication system is considered, where the receiver has a perfect CSI while the transmitters do not have any CSI, but are aware of the channel statistics. The construction of the proposed multiple-access codes is based on an in-depth understanding of the information theoretic aspects of the MAC that give insight on the behavior of the channel. In order to simplify the problem, a MAC with single-antenna at the transmitters and an arbitrary number of antennas at the receiver is first considered in a synchronous and an asynchronous scenario. Next, the general MIMO-MAC with multiple-antenna at both the transmitters and the receiver is investigated. Finally, the multiple-access relay channel is considered, where one or more relays help the users communicate with the destination while the cooperation between the users is not allowed. In this case, we applied the code constructed for the MIMO MAC in a distributed way." @default.
- W203960236 created "2016-06-24" @default.
- W203960236 creator A5066111268 @default.
- W203960236 date "2010-01-01" @default.
- W203960236 modified "2023-09-27" @default.
- W203960236 title "Codage espace temps pour les canaux MIMO à accès multiple" @default.
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