Ad Hoc network capacity utilizing MIMO-tehniques

Multiple-Input Multiple-Output (MIMO) antenna systems is a promising technique for achieving substantially increased capacities and robustness in future tactical wireless networks. The purpose of this work has been to investigate the maximum network capacity gains that can be achieved by employing MIMO-techniques in wireless ad hoc networks. We study these gains from a theoretical viewpoint and derive a close formed expression of the network capacity. Furthermore, the network capacity is also examined in urban environments, using two different channel models. The results show that, the MIMO link capacity gains for links carrying traffic translate into similar network capacity gains. The network topology impacts the achievable network capacity gains, since for the examined dense networks the MIMO link capacity gains are on average significantly smaller than for sparse networks.