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Third Generation Mobile Telecommunication Systems - UMTS and IMT-2000 (Paperback, Softcover reprint of the original 1st ed. 2001)
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Third Generation Mobile Telecommunication Systems - UMTS and IMT-2000 (Paperback, Softcover reprint of the original 1st ed. 2001)
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One hundred years ago, the notion of transmitting information
without the use of wires must have seemed like magic. In 1896, the
first patent for wireless communication was granted to Marchese
Guglielmo Marconi. Since then the field of wireless communications
which includes cellular systems has taken various forms of
development. It basically evolved through three Eras. The Pioneer
Era over the period of 1860-1921, the Precellular Era over
1921-1980 and the Cellular Era after 1980 and beyond. The first
generation cellular era started with the Analog Systems and evolved
in the digital domain utilizing Time Division Multiple Access
(TDMA) and Code Division Multiple Access (CDMA), thus comprising
the Second Generation Mobile Systems. The first generation RF
cellular communications systems deployed in the early to mid 1980's
had air interfaces comprised of analog technology. Among them were
AMPS (Advanced Mobile Phone System), NMT (Nordic Mobile Telephone),
and TACS (Total Access Communications System). These were designed
for use in a specific geographic area and not intended to be
deployed in other areas. There was not much commonality beyond
using the same air interface technology and same modulation. The
air interface technology was Frequency Division Multiple Access
(FDMA) and the modulation was analog FM, but with different
deviations and channel spacings. The frequency bands, air interface
protocols, number of channels, and data rates were different. In
general, these systems provided local and national coverage.
General
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