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AMPS:

Spectral allocations are in the 800-900 MHz region.

CDMA:

CDMA is a "spread spectrum" technology, which means that it spreads the information contained in a particular signal of interest over a much greater bandwidth than the original signal.

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Posted by waqqas1

plz visit the following link
http://www.apms.com.au/papers/cdma.html

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Posted by Hash007

AMPS is used for analog and CDMA is used for digitally but cdma uses code

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Posted by HamidAliKhan

* CDMA handoffs do not normally require frequency tuning.
* CDMA requires change of the code channel in the forward CDMA channel.
* No tuning, either frequency or code channel is required in the reverse CDMA channel at any time.

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Posted by rohit

AMPS:

Spectral allocations are in the 800-900 MHz region.

Several hundred channels are available within the spectrum allocation. One channel of one base station is used for each conversation. Upon handoff, the subscriber station is directed via messaging to discontinue use of the old channel and tune to the new one, on which it will find the new cell.

CDMA:

CDMA is a "spread spectrum" technology, which means that it spreads the information contained in a particular signal of interest over a much greater bandwidth than the original signal.

A CDMA call starts with a standard rate of 9600 bits per second (9.6 kilobits per second). This is then spread to a transmitted rate of about 1.23 Megabits per second. Spreading means that digital codes are applied to the data bits associated with users in a cell. These data bits are transmitted along with the signals of all the other users in that cell. When the signal is received, the codes are removed from the desired signal, separating the users and returning the call to a rate of 9600 bps.

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Posted by sagitraz