September 2001
Beginner
528 pages
14h 14m
English
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Mobile Telephone Service—Technologies
The first generation of cellular services introduced in the 1980s was analog. These were later upgraded to digital. The most important advantage of digital cellular is its improvement in capacity. Second generation digital cellular used in existing digital networks supports three to ten times the capacity of analog cellular.
Advanced Mobile Phone Services (AMPS)
Advanced mobile phone service (AMPS) is the analog cellular telephone service provided in the United States. (All two-way wireless handsets are in reality radios with transmitters and receivers. Radios transmit energy into the air.) Cellular service increased capacity of mobile technology because it reuses frequencies in hexagonal-shaped cells, as ...
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