TECHNOLOGY FOCUS

Satellite communication systems are playing a significant role in the exchange and delivery of many types of information, from voice communications to high definition television and Internet services . Satellites are particularly appealing whenever large coverage is desired, and when either collect or broadcasting applications are considered. High reliability and flexibility for setting up links make satellites unique for specific applications.

There are also used to complement terrestrial networks. However, satellites communications are faced with links impairments, limited bandwidth and power, and should allow access from multiple users with limited amount of interference.

From system designer to service provider, one should understand the specific constraints and opportunities of satellite communications.

Satellite Communication
Satellite Communication

COURSE CONTENT

This course presents the techniques that are used and points out the limitations and performance that can be expected from geostationary satellite systems. Emphasis is placed on the trade-offs that can be exercised within the constraints of technology and regulations.

The course is as practical as possible, underlying those techniques that are, or soon will be in use, with emphasis on performance trade-offs.

The course is designed to provide the attendees with the relevant knowledge on satellite link design and communications techniques, including those used for broadcasting and multimedia communications (DVB-S, DVB-S2). Networking aspects are introduced, focussing on physical and access layers and satellite network architectures. Specific issues in connection with the operation of multibeam satellites and on-board regeneration are dealt with.

A detailed overview on satellite communication payload, repeater and antennas, and earth station technology is given. Satellite communications engineering requires a combination of know-how in many various fields such as propagation, RF systems, antennas, signal processing, communications techniques, etc.

Several practical exercises are to be solved during the course to allow the attendees to practice the acquired knowledge.

It includes a project on the design of a European multibeam satellite communications system. The design considers performance and technology trade-off and aims at a cost efficient design of the earth segment.

WHO SHOULD ATTEND

  • Engineers, scientists and technical managers involved in the planning, design and operation of satellite communications systems
  • Designers and technical salesmen concerned with the manufacturing of satellite communication systems equipment
  • Technicians involved in the operation and maintenance of earth station or in the control of the satellite
Satellite Communication Systems

Due to Covid-19, and the uncertain travel recommendations for Autumn 2020, it is decided that this course is planned to run Online only. The daily schedule will be adjusted to fit remote training, with less hours per day divided into extra days. Make a preliminary booking and we will keep you updated.

Adapted Online Agenda as follows

Day 1


9:00 Opening: Presentation of course content and organisation

Morning session: Satellite Communications Systems

9:15 - 10:15

  • Introduction to Space Missions
  • Satellite Communication System Architectures

10:15 - 10:30 : break

10:30 - 11:30

  • Orbits of interest for satellite communications
  • Q&A

11:30 - 11:45 : break

11:45 - 12:45

  • Basics of Radio Regulations 
  • Applications

 

Afternoon session: Link Analysis (part 1)

14:00 - 15:00

  • Link Performance Evaluation and Objectives 
  • Carrier Power Budget

15:00 - 15:15 : break

15:15 - 16:15

  • Rain attenuation calculation as a function of percentage of time
  • Exercises on carrier power budget and Q&A

16:15 - 16:30 : break

16:30 - 17:30

  • Noise power spectral density budget
  • Link carrier power to noise power density ratio

17:30 - Q&A and suggested reading



Day 2
Morning session: Link Analysis (part 2) – Digital Communications

9:00 - 10:00

  • Overall Carrier to Noise Power Ratio linear case
  • Overall link budget with intermodulation and interference

10:00 - 10:15 : break

10:15 - 11:15

  • Link availability and static margin
  • Exercises on calculation of static margin as a function of link availability

11:15 - 11:30 : break

11:30 - 12:30

  • Digital communications system model
  • Basics of digital modulations: BPSK, QPSK

12:30 - Q&A

Afternoon session: Digital Communications (Part 2) – Project Work

14:00 - 15:00

  • Higher order modulations: MPSK, APSK
  • Spectral efficiency and roll-off concepts

15:00 - 15:15 : break

15:15 - 16:15

  • BER vs E/No performances
  • Channel Coding and Decoding,

16:15 - 16:30 : break

16:30 - 18:00 : Multibeam Satellite Communications System Project (Step 1)

  • Definition of networking architecture
  • Calculation or required C/No

 


Day 3
Morning session: Digital Communications (part 3) – Satellite Networking

9:00 - 10:00

  • Coding with variable RF bandwidth (review) and Coding with constant RF bandwidth
  • Exercises on Power-bandwidth trade-offs

10:00 - 10:15 : break

10:15 - 11:15

  • Concatenated Coding DVB-S2, DVB-SX, Adaptive Systems
  • Fade Mitigation Techniques

11:15 - 11:30 : break

11:30 - 12:30

  • Satellite Network Architectures : mesh, star; connectivity requirements
  • Multiple Access Techniques : FDMA

12:30 - Q&A

Afternoon session: Satellite Networking (Part 2) – Multibeam Systems

14:00 - 15:00

  • Multiple Access Techniques : Random access, TDMA
  • Multiple Access Techniques : CDMA

15:00 - 15:15 : break

15:15 - 16:15

  • Frequency reuse, Multibeam access systems architecture
  • DVB-S2-SX/RCS2 Systems

16:15 - 16:30 : break

16:30 - 18:00 : Multibeam Satellite Communications System Project (Step 2)

  • Link budgets definition
  • Overall C/No as a function of input back-off



Day 4
Morning session: Multibeam and High Throughput Systems

9:00 - 10:00

  • Interference and connectivity issues
  • Transparent and on-board processing

10:00 - 10:15 : break

10:15 - 11:15

  • Way forward to HTS and VHTS
  • Exercises on frequency reuse factor

11:15 - 11:30 : break

11:30 - 12:30

  • Communication payload functions and performance objectives
  • Communication payload architectures

12:30 - Q&A

Afternoon session: Communication Payload

14:00 - 15:00

  • Repeater components technology : LNA, IMUX, OMUX
  • Repeater components technology : HPA

15:00 - 15:15 : break

15:15 - 16:15

  • Antenna coverage concepts
  • Antenna technologies

16:15 - 16:30 : break

16:30 - 18:00 : Multibeam Satellite Communications System Project (Step 3)

  • Overall C/No as a function of input back-off
  • Station EIRP vs G/T requirements

 

Day 5
Morning session: Earth Station technology (Part 1)

9:00 - 10:00

  • Earth station and user terminal architecture
  • Antenna subsystem

10:00 - 10:15 : break

10:15 - 11:15

  • Exercise on Solar interference issues
  • Pointing and tracking

11:15 - 11:30 : break

11:30 - 12:30

  • RF Equipment: Low Noise amplifiers
  • RF Equipment: High Power Amplifiers

12:30 - Q&A

Afternoon session: Earth Station technology (Part 2) – Project Work

14:00 - 15:00

  • Ground Communications Equipment  
  • Up and down conversion, selection of intermediate frequency

15:00 - 15:15 : break

15:15 – 17:00 Multibeam Satellite Communications System Project (Step 4)

  • Selection of antenna diameter and type of tracking
  • G/T and EIRP calculations
  • Synthesis and Q&A

Said about the course from previous participants:

"Very skilled instructor!"

"Parallel exercise to compare theory and real life problems."

"General scope, practical exercises. Completeness, interactivity."

"The professionalism of the lecturer, way of explaining things."

"Ability to make us understand without too much maths, technical insight."

"Good overview, simple explanations of complex matters."

"Gave a good overview of "all" aspects of Satellite Communications."