(Code Division Multiple Access) has altered the face of cellular
communication ever since it has debuted in 1995. Its arrival heralded
the arrival of highly efficient networks with higher user capacities
and better voice quality, among a host of other features. Today, it is
a key enabling technology for the transition to not only 3G, but even
What is CDMA?
Code Division Multiple Access (or CDMA) is a spread spectrum carrier
access technique in which the original data signal is spread over a
large frequency range, with the help of a pseudo-random spreading
signal. This spreading technique imparts CDMA with a great deal of
resistance to multipath fading, as the signal occupies the entire
bandwidth. This is not the case in TDMA and FDMA technologies, wherein
each user signal is allocated a small fragment of the entire
bandwidth. CDMA manages to allocate each user with the entire channel
bandwidth by using a special code (the pseudo random spreading
signal), due to which, to a receiver locked on to one signal, all
other signals appear as noise.
CDMA based Wireless Embedded design :
Once the CDMA technologies pre-requisites are met, one will be able to
develop Embedded applications on CDMA platform. Be it a TCP/IP
protocol stack or some specific protocol. Virtually all applications
which can be built on the GSM platform can be built on CDMA .
For further details about CDMA please go to