Frequency coordination

Frequency Coordination is a technical and regulatory process which is intended to remove or mitigate radio-frequency interference between different radio systems which utilize the same operational frequency.

Normally frequency coordination is undertaken by "administrations" (i.e. national governmental spectrum regulators) as part of a formal regulatory process under the procedures of the Radio Regulations (an intergovernmental treaty text regulating the use and sharing of the radio frequency spectrum.[1]

Before an “administration” allows an operator to commence operation of a new radiocommunications network it must in principle undergo coordination. This involves the following steps:

Coordination thus ensures:

Coordination is thus closely bound to "date of protection" or "priority", defined by the date on which complete coordination data is received by the International Telecommunication Union. New planned networks must coordinate with all networks with an earlier “date of protection” but are protected against all networks with a later "date of protection". Planned (but not implemented) networks acquire status under this procedure but time limits ensure that protection is not forever if networks are not implemented.

Congress Authorizes FCC

In 1982, the United States Congress provided the FCC with the authority to use frequency coordinators:

List of Coordinators

For Public Safety frequency coordination -

For Business and special emergency -


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