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Wednesday, September 16, 2009

ppt on CELLULAR MOBILE COMMUNICATIONS .pdf download

Abstract:
GSM stands for Global System for
Mobile communications, and CDMA
stands for Code Division Multiple
Access. The GSM is built around the
TDMA, or the Time Division Multiple
Access concept. Basically, the two
technologies address differently the
same fundamental problem of mobile
communication, how to divide the finite
frequency of airwaves between multiple
users at the same time, or, how to make
more than one person to carry on a
conversation on the same frequency
without causing mutual interference..


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