Accepted Papers

          
  • Partial HARQ Retransmission for Broadcastin Fading Channels
    Samsung Research & Development UK, Staines-Upon-Thames, TW18 4QE, UK
    ABSTRACT

    In this paper, we study the feasibility of a hybrid scheduling approach for broadcast systems in frequency selective fading channels. The hybrid scheduling approach consists of two components: the first is the broadcast component and the second is the unicast component. The unicast component is activated if the mobile fails to correctly decode the packet and thus sends back a negative acknowledge to the base station. We show that there is an optimal modulation and coding scheme to be used for each component. The broadcast optimal modulation and coding scheme depends on the best alignment in fading between different receivers. The unicast optimal modulation and coding scheme depends on the particular fading profile of each mobile separately..

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