32nd Satellite Communications Systems Course
25 - 28 September 2017 | IET London: Savoy Place
Session 1 - Satellite principles and applications
This session introduces different satellite communication systems architectures and the resulting impacts on the satellite user. This sets the scene for more detailed lectures later in the week. Built on historical, current day and future developments, various simulations will be used to illustrate the different types of satellite coverage, and the relative merits of different constellation types.
This session also focuses on the goals of differing Satcom applications leading to an appreciation of the component parts, in both hardware and software, of a Satcom terminal.
The design goals of a Satcoms application engineer will be explored, preparing students to begin linking subsequent lectures to specific elements of a Satcom application.
Session 2 - Link budget primer
This session introduces the decibel notation and how it is used to represent system gain and loss.
The dB notation is then applied to signal power, and transmit EIRP, and the principles of a basic satellite link are developed. Noise is introduced, and it is shown how a simple link budget is derived.
Session 3 - Modulation and coding
The session gives an overview of the modulation schemes and error correction codes used in satellite systems, focussing first on the main performance parameters of these schemes, to assist with specifying the requirements for a particular system, and secondly on the fundamental principles behind them.
It will be illustrated with case studies drawn from the DVB-S2 and DVB-SH standards.
Session 4 - Satellite access techniques
This session commences with basic Satcom network architectures (Hub, Mesh), and multiplexing concepts. FDMA and TDMA are described as multiple access techniques, along with the principles of DAMA schemes.
Contention-based schemes are introduced (e.g. ALOHA). Spread spectrum techniques and CDMA are described, and schemes compared.
Session 5 - Antennas
This session will describe the basics of various types of antennas and define their respective performance parameters.
It will cover reflector geometries and proceed to describe satellite missions detailing the design drivers and constraints.
Examples will be taken from recent Airbus DS spacecraft but will be fairly generic, to avoid going into commercially sensitive areas.
Session 6 - Satcoms on the move
Today's mobile phone generation expects connectivity at all times and all places - easy if you're standing on a street corner in a town but more difficult on a plane at 30,000 feet or on a ship in the middle of the Ocean or on a train in a tunnel.
Whilst Satcom provides the best means of covering a large area at a low cost there are challenges. This session will explore the problems and solutions for Satcom on the move in the air, at sea and on land.
Session 7 - Spacecraft engineering and operations
This session first identifies the technical difficulties that a satellite engineer faces when designing a geostationary communications satellite. For example there are issues of remoteness, the impossibility of repair, the radiation environment and difficulties caused by working in a vacuum.
The standard ways in which the engineer overcomes these challenges are outlined in a generally jargon-free manner. The session aims to give a delegate an overview of the basics – and this complements other sessions on payload and antenna engineering.
Session 8 - Payload engineering
In this session we identify the main components of the communications payload and explain how designs are impacted by the changing needs of the user.
Session 9 - Earth station RF engineering
This session describes the procedure through which a hub earth station is planned, designed and implemented. The session concentrates on the RF aspects (up / down conversion, amplification and antenna).
Session 10 - Satellite systems planning – Power link budgeting
The power and noise link budgets are developed for complete outbound and inbound links. Calculation of C/N, C/I, G/T, EIRP and the noise performance of earth stations and satellite payloads is given.
You will learn how to assess the channel performance for fixed and mobile satellite links and its relationship with availability is given as well as how to include the effects of intermodulation in the link budgets.
Session 11 - Propagation
This session explains how propagation affects the link budget as an EM field is reflected, refracted, attenuated, depolarised and scattered as it passes through various medium comprising the satellite link.
Session 12 - QoS design using link budgets
This session links the QoS desired by users to the power link budgets. The role of modulation and coding and links to carrier bandwidth will is given as well as the error rate performance linked to the required C/N.
The overall design starting from the desired QoS and ending with the satellite system dimensioning is given and examples discussed.
Session 13 - VSAT network architectures
This session describes how commercially available networking platforms use different combinations of TDM, TDMA and SCPC to achieve the flexibility required for multiple applications.
Session 14A - Commercial aspects of Satcoms
The purpose of this session is to show how the technical aspects described in the other sessions of this course can be used to generate revenue and provide value for money through the implementation of various different satellite services, and how we manage some of the key risks along the way.
Session 14B - Military Satcoms
This session will commence with a study of the evolution and growth of military Satcoms and then proceed to explain the unique requirements of the space and ground segments and their associated threats and countermeasures.
We complete the session with some thoughts about the future.
Session 15 - TCP/IP over satellite
This talk discusses the issue of satellite access using Internet Protocols, in particular the problems caused by the comparatively long round-trip times of geostationary satellite systems, and describes the advantages and drawbacks of the most common techniques used to address these issues: compression, proxies and protocol enhancement.
Session 16 - Inmarsat 4, BGAN, GX and Ka-Band services
The Mobile Satellite Service (MSS) is an essential commodity for all remote users whether on foot or in a moving vehicle (Truck, Boat, Plane etc.). Whilst Inmarsat has for many years provided Internet access through their BGAN service, the new “Global Xpress” Ka-Band satellites will provide very high speed internet access to the worldwide mobility market.
This session will show how technological development has implemented the evolution of each new service.
Session 17 - The future of Satcoms
This session will summarise the state-of-the-art, and explore how the current and planned investments in new satellite constellations and emerging mobile terminal technologies will impact the future of MSS applications.
A range of future scenarios are envisioned in which satellite and terrestrial systems are provided seamless connectivity for a range of emerging applications.
Programme is correct at time of publication. Topics, speakers and/or sessions are subject to change.
Member - £1700
Non-member - from £1850
Student / retired- £1250
Government / military - £1000