On the Capacity of Slotted Aloha Based Multi-Hop Virtual MIMO Systems

Date Added: Sep 2010
Format: PDF

The performance of multi-hop Virtual Multiple-Input-Multiple-Output (V-MIMO) systems, when Slotted Aloha is used to select the radio resource at each hop, is investigated. Source, destination and relaying nodes, cooperate with neighboring devices (distributed according to a Poisson Point Process) to exploit spatial diversity by means of the concept of Virtual Antenna Array (VAA). Performance is evaluated in terms of outage probability, defined as the probability that the capacity between source and destination is smaller than a given threshold. It is computed as a function of the density of cooperating nodes, and the number of relaying VAAs.