1. Telecommunication by modulation and radiation of electromagnetic waves.
2. A transmitter, receiver, or transceiver used for communication via electromagnetic waves.
3. A general term applied to the use of radio waves. [NTIA] [RR]

A controller that supports the wireless mobility management and wireless access call control functions. It serves one or more subtending radio port controllers and may be associated with one or more PCS switching centers. [After T
1. Rpt34-1994]

Radionavigation equipment, on board an aircraft or spacecraft, used to determine the height of the aircraft or the spacecraft above the Earth's surface or another surface. [NTIA] [RR]

The combining of wire circuits with radio facilities. [JP 1-02]

See baseband.

A radiation pattern from a directional antenna, such that the energy of the transmitted electromagnetic wave is confined to a small angle in at least one dimension.

An assigned band of frequencies sufficient for radio communication.
Note 1: The bandwidth of a radio channel depends upon the type of transmission and the frequency tolerance.
Note 2: A channel is usually assigned for a specified radio service to be provided by a specified transmitter.

An encryption treatment applied to signaling or user data, which treatment is intended to prevent an unauthorized detector of the data from extracting information. [T
1. Rpt34-1994]

A telecommunications common carrier that provides radio communications services but is not engaged in the business of providing landline local exchange telephone service. [47CFR]

The remote control of an apparatus by signals conveyed by electromagnetic waves.
Note: Radio control may be used to control the movement of an aircraft, vehicle, missile, or other mobile unit, either manned or unmanned, from a radio station on the ground or in another mobile unit. [From Weik '89]