A spectrum-efficient interference-free frequency allocation scheme for a cellular radio system

A large volume of work has been devoted to searching for a better frequency assignment scheme to handle varying traffic loads in a cellular radio system. However, very little has been accomplished in designing a spectrum-efficient interference-free frequency allocation scheme for this type of system. It is attempted to describe a novel spectrum-efficient frequency allocation scheme that provides an operation which is free from co-channel interference as well as intracell adjacent channel and two-signal third-order intermodulation interference. The proposed scheme is fundamentally different from the existing cellular frequency assignment schemes in which traffic loading is considered without taking interference into account. In the design, we assume that the traffic is uniform in all the cells of the cellular system and there are the same number of channels in each cell.