What is uplink in communication?

For cellular devices such as smartphones & tablets, uplink and downlink pertain to the data speed and coverage we know as 3G, 4G LTE, and newer radio frequencies such as 5G. Signal coming to your phone from the cell tower is known as the downlink. Signal leaving your phone back to the cell tower is known as the uplink .

Definition of uplink 1 : a communications channel for transmissions to a spacecraft or satellite also : the transmissions themselves. 2 : a facility on earth for transmitting to a spacecraft or satellite. Other Words from uplink Example Sentences Learn More About uplink.

An uplink is that part of the communication link where signals from an earth terminal are sent to a satellite or some other type of airborne platform , hence the “up” portion of the term.

In satellite telecommunication, a downlink is the link from a satellite down to one or more ground stations or receivers, and an uplink is the link from a ground station up to a satellite . Some companies sell uplink and downlink services to television stations, corporations, and to other telecommunication carriers.

In satellite communication, the uplink frequency is higher than the downlink frequency because the attenuation level increase with an increase in frequency . The power at the ground station (Base Station) is more than compared to the power available at the satellite.