Frequency Coordination is a technical and regulatory process that removes or mitigates
radio-frequency
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around . This is roughly between the upp ...
interference
Interference is the act of interfering, invading, or poaching. Interference may also refer to:
Communications
* Interference (communication), anything which alters, modifies, or disrupts a message
* Adjacent-channel interference, caused by extr ...
between different radio systems that operate on the same
frequency
Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as ''temporal frequency'' for clarity, and is distinct from ''angular frequency''. Frequency is measured in hertz (Hz) which is eq ...
.
Normally frequency coordination is a function of an administration, such as a governmental spectrum regulator, as part of a formal regulatory process under the procedures of the
Radio Regulations
Radio regulation refers to the regulation and licensing of radio in international law, by individual governments, and by municipalities.
International regulation
The International Telecommunication Union (ITU) is a specialized agency of the Unit ...
(an intergovernmental treaty text that regulates the
radio frequency spectrum
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around . This is roughly between the upper ...
).
Before an administrations lets an operator operate a new radio communications network, it must undergo coordination in the following steps:
* Inform other operators about the plans
* Receive comments if appropriate
* Conduct technical discussions with priority networks
* Agree on technical and operational parameters
* Gain international recognition and protection on the
Master International Frequency Register The Master International Frequency Register (MIFR) is the formal database of satellite and terrestrial frequency assignments maintained by the International Telecommunication Union (ITU). Recording in the MIFR is the final stage of the frequency coo ...
* Bring the network into use
This coordination ensures that:
* All administrations know the technical plans of other administrations.
* All operators (satellite and terrestrial) can determine if unacceptable interference to existing and planned “priority” networks is likely, and have an opportunity to:
** Object
** Discuss and review
** Reach technical and operational sharing agreements
Coordination is thus closely bound to ''date of protection'' or ''priority'', defined by the date when the International Telecommunication Union receives complete coordination data. 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 does not last 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:
*Assist in developing and managing spectrum
*Recommend appropriate frequencies (designated under Part 90).
List of Coordinators
For Public Safety frequency coordination -
*
AASHTO
*APCO
*FCCA
*IMSA
For Business and special emergency -
*
AAA
AAA, Triple A, or Triple-A is a three-letter initialism or abbreviation which may refer to:
Airports
* Anaa Airport in French Polynesia (IATA airport code AAA)
* Logan County Airport (Illinois) (FAA airport code AAA)
Arts, entertainment, and me ...
*AAR
*EWA
*FIT
*
PCIA
*UTC
*Micronet Communications, Inc. - Since 1983
[https://www.micronetcom.com/ Frequency Coordinator]
References
{{reflist
Radio technology