Date Added: Nov 2012
The growing popularity of small cells is driving cellular networks of yesterday towards heterogeneity and randomness. Soon, hundreds of unplanned user deployed femtocells and tens of operator managed picocells will coexist in a typical macrocell. One of the natural ways to model Base Station (BS) locations in such heterogeneous cellular networks, or HetNets, is by using random spatial models. While sufficient progress has been made in modeling single-antenna HetNets, the authors' focus in this paper is on multi-antenna HetNets for which the modeling tools are not well developed.