The Free On-line Dictionary of Computing (30 December 2018):

Code Division Multiple Access
CDMA
code division multiplexing

    (CDMA) (Or "spread spectrum") A form of
   multiplexing where the transmitter encodes the signal using
   a pseudorandom sequence which the receiver also knows and
   can use to decode the received signal.  Each different random
   sequence corresponds to a different communication channel.

   Motorola uses CDMA for digital mobile phones.  Qualcomm
   pioneered the introduction of CDMA into wireless telephone
   services.

   (2001-03-28)