The processing of a mutual interference matrix by a digital computer

This paper is concerned with the assignment of frequencies to a simple communication system consisting of a communication center and several distant distinct sites. The mode of operation is assumed to be full duplex. A procedure is presented for determining sets of frequencies which can be assigned to such a communication system. Each set of frequencies is free of interference due to spurious emissions, and spurious responses at each site, and furthermore is free of interference due to transmitter intermodulation, i.e., the intermodulation products of two co-site transmitters does not interfere with a co-site receiver, and the intermodulation products of a transmitter at one site and a distant transmitter does not cause interference with a receiver at the given site. The assignment procedure is mechanized for the Burroughs 220 digital computer and an example is given.