FDMA (frequency division multiple access)
FDMA (frequency division multiple access) is the division of the frequency band allocated for wireless
cellular
telephone communication into 30 channels, each of which can carry a voice conversation or, with
digital service, carry digital data. FDMA is a basic technology in the analog
Advanced Mobile Phone Service (AMPS),
the most widely-installed cellular phone system installed in North America. With FDMA, each channel
can be assigned to only one user at a time. FDMA is also used in the Total Access Communication
System (TACS).
The Digital-Advanced Mobile Phone Service (D-AMPS)
also uses FDMA but adds time division multiple access (TDMA) to
get three channels for each FDMA channel, tripling the number of calls that can be handled on a
channel.
Contributor(s): Washington Rodriguez Sanchez
This was last updated in August 2000
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