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Monday, November 3, 2014

Definition CDMA

Stands for "Code Division Multiple Access." CDMA is a wireless transmission technology that was developed during World War II by English allies to avoid having their scrambled transmissions. After the war, Qualcomm patented technology and commercially available as a digital cellular technology. Now CDMA is a popular method of communication used by many cell phone companies.

Unlike GSM and TDMA, CDMA transmits on all available frequencies. It does not affect an individual user's communication network frequency. This method, called multiplexing, which is difficult to jam transmissions during World War II. Because CDMA does not limit the frequency range of each user, it is more bandwidth available. This allows multiple users to communicate over the same network at the same time so that each user is assigned a specific frequency interval.

Because CDMA is a digital technology, the analog audio signals must be digitized before being transmitted over the network. CDMA is used by the 2G and 3G wireless communications and typically present in the frequency range from 800 MHz to 1.9 GHz wireless.
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