Radio communications

radio broadcasting using frequency modulation

Ultra-wideband (UWB, ultra wideband, ultra-wide band and ultraband) is a radio technology that can use a very low energy level for short-range, high-bandwidth communications over a large portion of the radio spectrum. UWB has traditional applications in non-cooperative radar imaging. Most recent applications target sensor data collection, precise locating, and tracking. UWB support first appeared in high-end smartphones in 2019. For a detailed list of Ultra-wideband supported mobile devices, see List of UWB-enabled mobile devices.

radio broadcasting using amplitude modulation

a radio that can do both transmit and receive a signal (a transceiver), unlike a broadcast receiver which only receives content; allows the operator to have a conversation with other similar radios operating on the same radio frequency (channel)

telecommunications status

measurement of the power present in a received radio signal

classification of a radio signal

cellular network infrastructure

formal written message transmitted by radio

straying of waves in the radio and electromagnetic spectrums outside their allocations that cause problems for some activities, of particular concern to radio astronomers

radio frequency designated for emergency communication

push to talk over cellular radio

Codan Limited is a manufacturer and supplier of communications, metal detection, and mining technology, headquartered in Adelaide, South Australia with revenue of A$348.0 million (2020).

class of large multielement directional wire radio transmitting antennas

operating signal for "request to communicate"

In communications, a system is wideband when the message bandwidth significantly exceeds the coherence bandwidth of the channel. Some communication links have such a high data rate that they are forced to use a wide bandwidth; other links may have relatively low data rates, but deliberately use a wider bandwidth than "necessary" for that data rate in order to gain other advantages; see spread spectrum.