CDMA abbr Code Division Multiple Access

July 21, 2012

See also: LTE, GSM, Spread Spectrum

CIMM DEFINITION: A communication channel access principle that employs spread-spectrum technology and a special coding scheme (where each transmitter is assigned a code).

2 : CDMA also refers to digital cellular telephony systems that use this multiple access scheme, as pioneered by QUALCOMM, and W-CDMA by the International Telecommunication Union (ITU), which is used in GSM’s UMTS.

3 : A digital cellular technology that uses spread-spectrum techniques. Unlike competing systems, such as GSM, that use TDMA, CDMA does not assign a specific frequency to each user. Instead, every channel uses the full available spectrum. Individual conversations are encoded with a pseudo-random digital sequence. CDMA consistently provides better capacity for voice and data communications than other commercial mobile technologies, allowing more subscribers to connect at any given time, and it is the common platform on which 3G technologies are built. (Source: