breif on CDMA & GSM Tech.

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CDMA
GSM
Hello sir!! sir plz tell me what is the difference between CDMA & GSM Tech.?why it required?Is these oly tech. used in mobile or some other tech. are using. I want to know each and everything about cdma & gsm radio tech. Thanks.
ASKED: August 23, 2009  6:12 PM
UPDATED: March 17, 2010  8:32 PM

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In CDMA only 1 frequency is distributed to more than 1 call(or connections) unlike GSM where seperate
frequency is assigned to each call.
That means in CDMA we are using less spectrum and dividing it to multiple calls at a time whereas in GSM
each call is made in seperate frequency.

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