Performance of small-scale multiple site diversity scheme evaluated through a 3D rain model

The dual-site diversity technique has proven to be quite useful in counteracting rain attenuation; this technique can be extended adopting a multiple-site configuration, where N stations are located on a circle. Simulations for small-scale multiple-site diversity systems have shown significant improvements in terms of diversity advantage and site separation reduction, with respect to the corresponding dual-site configuration. We have also found that the performance of these systems can be conveniently predicted using the ExCell model. This model can be very easily adjusted to the local environment through the use of the cumulative distribution function of point rain rate.