cellular phone technology
that (unlike Global System
For Mobile Communication
or GSM) does not partition
the available bandwidth
a separate frequency
to each call. Instead, it assigns the entire bandwidth to one call and encodes each call in
a manner that only the intended receiver
can decode it. Since encoding filters out the background noise
and a wide bandwidth allows more data
to be sent in the same period
, it promises clear, fast, and interference-free communication. Out of its several versions, version
1X provides a 1.25 megahertz (MHz) bandwidth, and version 3X a 5 MHz bandwidth.
Invented during World War 2 to evade jamming of Allied forces signals by Germany, it was developed
for cellular use by the US company
Qualcomm which owns most of its patents and all licensing rights. See also TDMA.