SATELLITE NETWORKS

SATELLITE NETWORKS

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

CDMA and DSSS.

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.