A Computational-Geometry-Based Tool for the Cellular Design of Millimeterwave Mobile Communications Systems in Urban Environments

Cellular communications systems are formed by a collection of transmitters (base stations), each of which ensures the communication with the mobiles in an associated coverage area designated by cell. In a system with an FDM/TDM transmission structure different cells use different frequencies for their operation. To avoid interference, base stations which are geographically close have to use different radio frequencies. In order to maximize the use of the available spectrum of frequencies and increase the system capacity, base stations which are far enough apart can reuse the same (i.e., cochannel) frequency. The reuse of frequencies is possible only if the corresponding level of interference at the cochannel cells does not exceed a given threshold value, which is determined by the quality of signal associated with the employed digital transmission technology [1].