1. SATELLITE
COMMUNICATION
Muhammad Riyan (2012-cs-157)
Saleem Ahmed Tauseef (2012-cs-092)
Asim Farid (2012-cs-190)
Sameer Rind Baloch (2012-cs-164)
Submitted to : MISS AYESHA UROOJ
WIRELESS NETWORKING

2. CONTENT
 What is Satellite ?
 What is SatelliteCommunication ?
 How do Satellite works ?
 Types of Satellite
 Orbits
 Elements of SatelliteCommunication System
 SatelliteCommunication services
 Advantages / Disadvantages
 Application of SatelliteCommunication

3. SATELLITE
An artificial body placed in orbit around the
earth to collect information or for
communication.

4. SATELLITE COMMUNICATION
 A communication satellite is a radio relay station
in orbit above the earth.
 It receives, amplifies and redirects analog and
digital signals carried on a specific radio
frequency.
 SatelliteCommunication plays a vital role in the
global telecommunication system.

5. HOW DO SATELLITE WORKS
 Two stations on earth want to communicate
through radio broadcast but are too far away to
use conventional means.
 The two stations can use satellite as a relay
station for their communication.
 One Earth Station sends a transmission to the
satellite.This is called Uplink.
 The satellite Transponder converts the signal
and sends it down to the second earth station.
This is called a Downlink

7. TYPES OF SATELLITE
 Active satellite
It is one in which the signal is amplified and its
frequency changed by transponder, before it sent back
to earth.
Example:Communication,Broadcasting Satellites

8.  Passive satellite
These type of satellites simply reflects or
scatters the micro wave signal back to another
station.
Example:Military and non profitable
servieces

9. ORBITS

10. ELEMENTS OF SATELLITE COMMUNICATION
SYSTEM
Two major elements of Satellite Communications Systems are:
 Space Segment
 Ground Segment
The Space Segment includes:
 Means for launching satellite
 Satellite(Transponders)
 Power supply system
The ground segment consists of:
 Earth Stations
 RearWard Communication links
DVB-S(2)
DVB-RCS
Outbound subscriber
(target of interest)
Gateway station
Central Hub
Forward
link
Reverse
link
Forw
ard
link
R
everse
link
SatMon station

11. SATELLITE COMMUNICATION SERVICES
Different Satellite Communications services are
classified as
 One way link
 Two way link.

12. ONE-WAY SETELLITE SERVICES
 Broadcast Satellite Service: Radio,TV, Data broadcasting.
 Safety services : Search & Rescue, Disaster Warning
 Radio Determination Satellite Service(Position location)
 Standard frequency and time signal satellite service
 Space Research Service.
 Space operations service.
 Earth Exploration Satellite Service.

13. TWO-WAY SATELLITE SERVICES
 Fixed Satellite Service: Telephone, fax, high bit rate data etc.
 Mobile Satellite Service: Land mobile, Marine time mobile,
Aero-mobile, personal communications.
 Satellite News Gathering.
 Inter Satellite Service.

14. ADVANTAGES OF SATELLITE COMMUNICATION
 Universal:Satellite communications are available virtually everywhere.
 Versatile: Satellites can support all of today's communications needs.
 Reliable: Satellite is a proven medium for supporting a company's
communicationsneeds.
 Seamless: Satellite's inherent strength as a broadcast medium makes it
perfect.
 Fast: Sincesatellitenetworkscanbesetupquickly,companiescanbefast-
to-marketwithnewservices.

15. cont…
 Flexible
 Expandable
 High Quality
 Mobile and Emergency Communication
 Suitable for both Digital and AnalogTransmission

16. DISADVANTAGES OF SATELLITE
COMMUNICATION
 Launching satellites into orbit is costly.
 Satellite bandwidth is gradually
becoming used up.
 There is a larger propagation delay in
satellite communication than in
terrestrial communication.

17. APPLICATIONS OF SATELLITE COMMUNICATION
 Telephone
 Television
 Digital cinema
 Radio
 Internet access
 Military

18. THANK YOU