Compatibility, reliability and adaptivity

It is shown how problems in spectrum economy and management can be solved by adaptive systems. The concepts of compatibility, reliability, and adaptivity are defined and applied to the analysis of EM communication systems. The degree of electromagnetic pollution of a system is shown to be a function of space and frequency and an EMC measure is defined with reference to a normal receiver with an isotropic antenna, for the case of radio communication systems with disturbing transmitters or noise sources. Special attention is given to the electromagnetic pollution in a system with co-channel transmitters. The use of adaptive antenna systems is considered, with particular reference to VHF/UHF broadcasting networks in Europe.