CDMA

What is CDMA ?

 Code Division Multiple Access. This is a communication technology use in 2G and 3G wireless  communication.  As name implies this technology use multiplexing .It use Ultra High Frequency  Band (UHF) 800 MHz to 1.9 GHz .

figure shows different users data is first converted into code and that code is multiply with a uniqe number and than it will be transmitted to receiver , on that side by using that code which we use in transmitter side again multiply so we get our original data on receiver side .
This is a basic multiplying technique.

This figure shows how data is multiply with a unique code on transmitter side and again same process is done on reverse direction.

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