Statistical characterization of Zero-Forcing Coordinated Base Station Transmission for femtocell environments

In this work we consider the interference between femtocells in a high density scenario which is characterized by a low signal to interference plus noise ratio. Therefore, it is necessary to use novel interference schemes like Zero-Forcing Coordinated Base Station Transmission (ZF-CBST). This paper presents a statistical analysis of ZF-CBST parameters and rates achieved per user if the power is assigned to maximize the sum rate. Finally we propose a semi-analytical method to build up the probability density function (pdf) of these parameters, which provide optimal results if the number of users is less than the number of femtocells.