Interference in a dense radio network

Radio systems operating at frequencies above 10 GHz are limited to short hops by rain attenuation. A severe interference problem arises from the fact that in a given area many repeaters may mutually interfere through through the back and side lobe responses of their antennas. Introducing the concept of frequency spectrum conservation by maximizing the communication flow through an area, a model of a dense network of radio systems has been studied to determine the effect of antenna discrimination and bandwidth expanding modulation methods upon the total communication capacity in a given frequency band. We conclude that for efficient performance, bandwidth expansion is required; we also conclude that communication capacity can be considerably increased by improving the near side lobe performance of antennas.