CDMA is a form of wireless multiplexing, in which data can be sent over multiple frequencies simultaneously, optimizing the use of available bandwidth. In a CDMA system, data is broken into packets, each of which are given a unique identifier, so that they can be sent out over multiple frequencies and then re-built in the correct order by the receiver.
The technology is used in cellular telephone systems in the 800-MHz and 1.9-GHz bands.
Compare to TDMA.
