Frequency planning for broadcast services in Europe

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Abstract
The regular lattice theory is a powerful tool to achieve an efficient use of the frequency spectrum when assigning frequencies or channels to broadcast transmitters. In this paper the basis of the theory is explained, and it is shown how it can be implemented in planning broadcasting transmitter networks for AM or FM sound and television. Physical laws and local considerations will, of course, influence the design of networks and some practical examples are given to make clear how they have been taken into account. The theory will be useful not only in building or remodeling actual transmitter networks, but also with the aim of optimizing technical parameters such as channel spacing, transmitter characteristics, etc. In this later case computerized method will be efficient. Regular lattices have been of some help in former ITU planning conferences, and will certainly be of assistance to experts in charge of achieving good plans in the future conferences of the years to come.

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