Cooperative Distributed MIMO Channels in Wireless Sensor Networks

— The large number of network nodes and the energy constraints make Wireless Sensor Networks (WSN) one of the most important application fields for Cooperative Diversity. Node cooperation increases the spatial diversity of wireless channels and, thus, reduces the transmitted power. In this paper, we propose a multi-hop WSN with nodes grouped in cooperative clusters that exploits transmit and receive cooperation among cluster nodes. Multi-hop transmission is carried out by concatenating single cluster-to-cluster hops, where every clusterto-cluster link is defined as a cooperative distributed multipleinput-multiple-output (MIMO) channel. Transmit diversity is exploited through a time-division, decode-and-forward, relaying scheme based upon two time slots: the Intracluster Slot, used for data sharing within the cluster, and the Intercluster Slot, used for transmission between clusters. At the receiver side, a distributed reception protocol is devised based upon a Selection Diversity a...

• Type: Journal
• Year: 2007
• Where: JSAC
• Authors: Aitor del Coso, Umberto Spagnolini, Christian Ibars
• Keywords: Cooperative, Energy Constraint, Intercluster Slots, JSAC 2007