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April 18, 2017

What is CDMA?

Nearly one billion people around the world use such system, but few know what it really is.

By Joao Lima

Code-division multiple access (CDMA) is a radio system used in mobile phones. CDMA, together with GSM (global system for mobiles) are the technologies that ‘lock’ a phone to a given network.

CDMA is mostly used in UHF cellular telephone systems in the range of 800-MHz to 1.9-GHz. It is also used as an access method in mobile phone standards.

The system uses a spread-spectrum multiple access technique to spread data bandwidth uniformly.

What’s the history of the technology?

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