1...The cellular concept was developed and introduced by the Bell
Laboratories
in the early 1970s.
2..One of the most successful initial implementations of the
cellular concept was the advanced mobile phone system (AMPS), which has
been available in the United States since 1983.
MULTIPLE ACCESS TECHNOLOGIES FOR CELLULAR SYSTEMS
• frequency division multiple access (FDMA)
• time division multiple access (TDMA)
• code division multiple access (CDMA)
BASIC BLOCK DIAGRAMS OF 3 CELLULAR SYSTEM
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