Note for Satellite Communication System - SCS By Amity Kumar

Topics ( 6 )

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INDEX SHEET SL.NO I 2 3 4 5 6 UNITS UNIT – 1 Over view of Satellite Systems Unit – 2 Orbits Unit – 3 Propagation impairments and space link Unit – 4 Space Segment Unit - 5 & 6 Earth Segment Unit - 7 & 8 DBS, Satellite mobile and specialized services PAGE NO. 4-6 7-15 16-24 25-31 32-43 44-50 Page 3

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Unit – 1 Over view of Satellite Systems Introduction, frequency allocation, INTEL Sat. 3 Hours Text Book: 1. Satellite Communications, Dennis Roddy, 4th Edition, McGraw-Hill International edition, 2006. References books: 1. Satellite Communications, Timothy Pratt, Charles Bostian and Jeremy Allnutt, 2nd Edition, John Wiley & Sons, 2003. 2. Satellite Communication Systems Engineering, W. L. Pitchand, H. L. Suyderhoud, R. A. Nelson, 2nd Ed., Pearson Education., 2007. Page 4

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1.1 Introduction Features offered by satellite communications Large areas of the earth are visible from the satellite, thus the satellite can form the star point of a communications net linking together many users simultaneously, users who may be widely separated geographically. Provide communications links to remote communities. Remote sensing detection of pollution, weather conditions, search and rescue operations. 1.2 Frequency allocations International Telecommunication Union (ITU) coordination and planning World divided into three regions: Region 1: Europe, Africa, formerly Soviet Union, Mongolia Region 2: North and South America, Greenland Region 3: Asia (excluding region 1), Australia, south west Pacific Within regions, frequency bands are allocated to various satellite services: Fixed satellite service (FSS) Telephone networks, television signals to cable Broadcasting satellite service (BSS) Direct broadcast to home Astro is a subscription-based direct broadcast satellite (DBS) or direct-to-home satellite television and radio service in Malaysia and Brunei Mobile satellite service Land mobile, maritime mobile, aeronautical mobile Navigational satellite service Global positioning system Meteorological satellite service Page 5

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Frequency band designations in common use for satellite service 1.3 Intelsat International Telecommunications Satellite Created in 1964, now has 140 member countries, >40 investing entities Geostationary orbit ----orbits earth`s equitorial plane. Atlantic ocean Region (AOR), Indian Ocean Region (IOR), Pacific Ocean Region. education, interactive video and multimedia Latest INTELSAT IX satellites wider range of service such as internet, Direct to home TV, telemedicine, tele- education, interactive video and multimedia Recommended Questions: 1. Explain briefly various services provided by a satellite . 2. What is the frequency bands allocated to various satellite services? Page 6