What Does Frequency Division Multiple Access (FDMA) Mean?

Frequency Division Multiple Access (FDMA) is a channel access technique found in multiple-access protocols as a channelization protocol.

Techopedia Explains Frequency Division Multiple Access (FDMA)

FDMA is different from frequency division duplexing (FDD). While FDMA permits multiple users to simultaneously access a transmission system, FDD describes the way the radio channel is shared between the downlink and uplink.