Interference Mitigation With Base Station Cooperation In Multicell Multiuser Wireless Systems – Velser Darllan Benício Correia

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Resumo:

This Master´s dissertation tackles the problem of interference mitigation in multi-cell multi-user wireless communication scenarios where a ditributed MIMO structure can be made feasible by assuming that a perfect BS cooperation is allowed. Performance evaluation of different interference mitigation approaches is assessed. By considering a set of cooperative BSs as a joint MIMO transmitter, streams intended to a set of co-channel MSs can be spread across all transmit antennas and hence, precoding techniques can be fully applied to suppress co-channel interference. The performance of different linear and non-linear precoding techniques is evaluated, taking also into account scenarios with imperfect channel estimation. Additionally to precoding techniques, inter-cell scheduling is discussed as well as the application of both approaches together, but yet decoupled from each other. As a step further, this work extends previous studies on the theme of BS cooperation by taking into account the impact of size-limited cooperation groups (each cooperation group is, in fact, a cluster in the overall grid) in a system-wide cellular deployment and by proposing an efficient joint scheduling and precoding algorithm. The proposed algorithm takes into account the out-of-cluster interference and is shown to outperform other strategies, while still presenting a low computational complexity.

Detalhes:

  • Categoria: Teses e dissertações
  • Instituição: UFC/ENGENHARIA DE TELEINFORMÁTICA
  • Área de Conhecimento: ENGENHARIA ELÉTRICA
  • Nível: Mestrado
  • Ano da Tese: 2009
  • Tamanho: 2.10 MB
  • Fonte: Portal Domínio Público

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