The main difference between GSM and CDMA is: In GSM, the

entire frequency band is not available to the end-user,

while in CDMA the entire frequency band is available to the

end-user. So, the Frequency Re-use factor is 1 in CDMA.

GSM Works as follows:

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The entire frequency band is divided into chunks and

each such chunk is divided into timeslots and each such

portion is made available to a user.

CDMA Works as follows:

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The entire frequency band is available to the user. So,

in order to differentiate, the transmission from each user

is "spread" or coded using an unique code given to

individual user. At the receiving end, the spread

information is decoded.