3G Wireless

ALSO CALLED: 3G, 3G Wireless Services, IMT-2000, International Mobile Telecommunications 2000, and Third Generation Wireless
DEFINITION: 3G refers to the third generation of mobile telephony (that is, cellular) technology. The third generation, as the name suggests, follows two earlier generations. The first generation (1G) began in the early 80's with commercial deployment of Advanced Mobile Phone Service (AMPS) cellular networks. Early AMPS networks used Frequency Division Multiplexing Access (FDMA) to carry analog voice over  … 
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3G WIRELESS DEFINITION (continued): …  channels in the 800 MHz frequency band. The second generation (2G) emerged in the 90's when mobile operators deployed two competing digital voice standards. In North America, some operators adopted IS-95, which used Code Division Multiple Access (CDMA) to multiplex up to 64 calls per channel in the 800 MHz band. Across the world, many operators adopted the Global System for Mobile communication (GSM) standard, which used Time Division Multiple Access (TDMA) to multiplex up to 8 calls per channel in the 900 and 1800 MHz bands. The International Telecommunications Union (ITU) defined … 
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