handphone: CDMA ( Code Devision Multiple Access )

CDMA ( Code Devision Multiple Access )

CDMA is a third generation (3G), a technology that uses the spread spectrum technique. Unlike the GSM uses Time Division Multiplexing (TDM), CDMA does not provide a specific frequency on the individual user. Each channel uses the available spectrum in full. Conversations in the individual akan encode with the settings of a digital pseudo random.

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Mobile phone HISTORY

Mobile phone is a combination of technology combined with the Radio Communications Telephone technology. Phone the first time found and created by Alexander Graham Bell in 1876. While communication with wireless (wireless) is found by Nikolai Tesla in the year 1880 and introduced by Guglielmo Marconi.
Root of the development of digital wireless and mobile starts since 1940 when the car phone technology is commercially introduced. When compared with the current so rapid, in fact this technology has obstacles in the development of more than 60 years. This is because the development of cheaper technologies such as semi-conductor transistor or not yet well developed. Once found it's possible the development of transistor technology became more rapid.

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CDMA ( Code Devision Multiple Access )

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Mobile phone HISTORY

Development of Cellular TECHNOLOGY