CDMA

Code-Division Multiple Access.

CDMA is a digital wireless
technology. It is a general type of technology, implemented in many
specific technologies. But the term “CDMA” is also commonly used to
refer to one specific family of technologies (IS-95 and CDMA2000) that
competes with technologies such as GSM.

CDMA is a “spread
spectrum” technology, which means that it spreads the information
contained in a particular signal of interest over a much greater
bandwidth than the original signal.

Unlike many competing
technologies, CDMA has no hard limit for the number of users who may
share one base station (tower). Instead, with CDMA, additional users
can connect until the base station determines that call quality would
suffer beyond a set limit.

CDMA (IS-95) systems have been in
commercial operation since 1995. CDMA networks operate in the 800 and
1900 MHz frequency bands with primary markets in the Americas and Asia.
IS-95 CDMA systems are sometimes referred to as cdmaOne. The next
evolutionary step for CDMA to 3G services is cdma2000.

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