SATELLITE NETWORKS
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سٹیللیٹ نیٹ ورکس |
Cellular telephony provides
communication between two devices. One or both may
be mobile.
A cellular service area is divided
into cells.
Advanced Mobile Phone System (AMPS)
is a first-generation cellular phone system.
Digital AMPS CD-AMPS) is a
second-generation cellular phone system that is a digital version of AMPS.
Global System for Mobile
Communication CGSM) is a second-generation cellular
phone system used in Europe.
Interim Standard 95 CIS-95) is a
second-generation cellular phone system based on
The third-generation cellular phone
system will provide universal personal communication.
A satellite network uses satellites
to provide communication between any points on Earth.
A geostationary Earth orbit CGEO) is
at the equatorial plane and revolves in phase with Earth.
Global Positioning System CGPS)
satellites are medium-Earth-orbit (MEO) satellites that provide time and
location information for vehicles and ships.
Iridium satellites are
low-Earth-orbit (LEO) satellites that provide direct universal voice and data
communications for handheld terminals.
Teledesic satellites are
low-Earth-orbit satellites that will provide universal broadband Internet
access.
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