Intersystem interference modelling for land mobile systems

This paper presents a set of detailed analytical models which are applicable to several types of radio transceivers, and discusses their application in the computations of interference as a function of the frequency displacement between the interfering transmitter and the victim receiver. The subject of this paper is motivated by the necessity of sharing the limited radio spectrum resources by a growing number of radio services, and an ever increasing number of users within each service. For example, the recent North American decision regarding spectral allocations for PCS services call for the deployment of new PCS services in frequency bands that are currently occupied by fixed microwave services. The steadily increased demand on the radio spectrum is bound to create other scenarios similar to the PCS/fixed microwave example, and will eventually lead to an intense interference environment within which old and new services must co-exist. An accurate modelling and computation of interference levels in such an environment is important.