Satellite communication system
Abstract:
This paper mainly focuses on satellite through each & every Human. Satellite is the wireless medium. Satellite that oribit the earth do so as a result of the balance between centrifugal and gravitational forces.
A communication satellite is a spacecrafy that carries aboard communication equipment ,enabling a communication page link to be established between distant points .The need to carry fuel imposes one of the major must limit ....etc

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Abstract
Satellite communication systems consist of Earth-orbiting communications platforms that receive and retransmit signals from earth-based stations. A typical television satellite receives a signal from a base station and broadcasts it to a large number of terrestrial receivers. Signals to satellites are called uplinks, and signals from satellites are called downlinks. Uplinks have also been called shooting the bird. The downlink covers an area called the footprint, which may be very large or co ....etc

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Abstract
LEO is Low Earth Orbit satellite.It circulates on a lower orbit in a shorter period . Additionally LEO systems try to ensure a high elevation for every spot of the earth to provide a highquality communication page link . The networks will play an important role in the evolving information infrastructure . It provides communication with shorter endto- end delays and e_ciency frequency usages . Some problems need to be solved before LEO satellite system can be successfully deployed . One of these problems is handover management . Even ....etc

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Global satellite system communication



INTRODUCTION

To make a satellite phone call today from a location that does not offer terrestrial wireline or wireless coverage requires the use of a large, costly terminal, and entails very high per minute charges. Further, the quality of service is relatively poor because of annoying echoes, large transmission delays, overtalk associated with satellite communications using geostationary satellites. The next generati ....etc

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Definition

The European Space Agency (ESA) has programmes underway to place Satellites carrying optical terminals in GEO orbit within the next decade. The first is the ARTEMIS technology demonstration satellite which carries both microwave and SILEX (Semiconductor Laser Intro satellite Link Experiment) optical interorbit communications terminal. SILEX employs direct detection and GaAIAs diode laser technology; the optical antenna is a 25cm diameter reflecting telescope.

The SILEX GEO terminal is capable of receiving data modulated on to ....etc

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