Esquemas de Multiplexação Cooperativos com Cluster de Relays para Dois Usuários

Abstract

This paper proposes two hybrid multiplexing transmission schemes composed by two source nodes, one destination node, and several relays. These latter are geographically spread in three different regions and are distributed in clusters, namely Ra, Rb, and Rc. More specifically, Ra and Rb contain a group of relays that may forward to the destination the information sent by source 1 and source 2, respectively, and Rc is the intersection cluster region that receives jointly the signals from both sources. Two different scenarios are analyzed. In the first scheme, Rc has a certain number of single-antenna relays, and in the second scheme Rc is formed by a single multiple-antenna relay station. The relay nodes at Ra and Rb clusters employ the amplify-and-forward protocol, whereas Rc uses the decode-remodulate-and-forward protocol. Based on these two schemes, a hybrid multiplexing transmission strategy is proposed from which insightful discussions are provided.