Introduction

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Из курса от партнера Institut Mines-Télécom

Introduction to Satellite Communications

237 оценки

Institut Mines-Télécom

Introduction to Satellite Communications

237 оценки

How is a satellite built? How do they fly? How do they communicate and how does the network operate? You will get all the answers in this course from teachers and researchers from three schools associated with Institut Mines-Télécom. The course is made of : teaching videos, equipment demonstrations and simulation programs. They will guide you through the discovery of satellite communications. Professionals in the space field will share there vocation for this scientific and technical sector. Have you ever wanted to know more about transponders, the geostationary orbit, QPSK modulation, channel coding, link budget, TCP over large bandwdith x delay product links ? This course is for you! This course is available in English: French-speaking lecturers with English subtitles and fully translated contents (slides, practices). This MOOC is supported by the Patrick and Lina Drahi Foundation.

Из урока

Networking and services

This module explains how services such as voice, television and Internet access are provided by means of communications satellites.

Introduction2:55

Before the Internet4:12

Internet and the notion of network3:51

Interconnection and interoperability: a real issue5:16

The notion of protocol6:17

Going further: Internet Protocol and the hourglass4:18

Познакомьтесь с преподавателями

Laurent Franck
Professor
IMT Atlantique, on leave to Airbus Defence & Space as of September 1st, 2017
Tarik Benaddi
Associate Professor
IMT Atlantique
Julien Fasson
Associate Professor
INPT/ENSEEIHT
Nathalie Thomas
Associate professor
INPT/ENSEEIHT
Marie-Laure Boucheret
Professor
INPT/ENSEEIHT

-Hello. We have now reached the last week of this lecture.

Together, we will talk about satellite systems,

their interconnection and interoperability with other networks,

in particular terrestrial networks.

But let us first put all this aside. Many notions need to be defined,

interoperability, interconnection, where should it be implemented,

with which entity.

Let us first get back to the satellite communication notion,

and more generally, to the communication notion.

It might be slightly philosophical,

but communication is essential for humanity.

Its evolution is linked to communication from the beginning

with speech, then writing, the alphabet, and then books,

the printing press, etc., until today with the Internet

that I am using for this lesson.

Human beings have the will to communicate very remotely

with as many people as possible, from anywhere to anywhere.

For this kind of communication, we always encounter stars

as an essential communication medium.

Of course, at first we only used stars to receive some information

that was not sent by human beings. It could be divinatory interpretations

but above all as navigation to find one's bearings.

Then, thanks to electromagnetic waves, we managed to send waves towards stars

and more precisely towards the Earth's natural satellite, the Moon.

This is called Earth-Moon-Earth, EME. Then came along artificial satellites

that have strong assets.

This is what Laurent called "the strengths of satellites",

such as the satellite's coverage, broadcasting, sturdiness, throughput.

This is what I illustrated here on several slides

so that you can recall these major facts.

First, satellites have an important coverage.

Geostationary satellites can cover a quarter to a third

of the Earth's surface if we do not consider the poles.

They can also cover very isolated zones,

a small island lost in the middle of the Pacific Ocean,

or a plane, a boat in the middle of the ocean, a desert area, anything.

No actual terrestrial infrastructure is required.

Only energy is required.

Finally, they broadcast over this whole coverage.

It can be interesting to broadcast to many people simultaneously.

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