20-01-2012, 02:43 PM
CDMA technology
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INTRODUCTION :-
Code division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA employs spread-spectrum technology and a special coding scheme (where each transmitter is assigned a code) to allow multiple users to be multiplexed over the same physical channel. By contrast, time division multiple access (TDMA) divides access by time, while frequency-division multiple access (FDMA) divides it by frequency
Advantages of GSM
GSM is already used worldwide with over 450 million subscribers.
International roaming permits subscribers to use one phone throughout Western Europe. CDMA will work in Asia, but not France, Germany, the U.K. and other popular European destinations.
GSM is mature, having started in the mid-80s. This maturity means a more stable network with robust features. CDMA is still building its network.
