TM 2582
Satellite - Mobile Broadcasting
44th Meeting of the Technical Module
of the DVB Project
Geneva, 21st of November 2001
Satellite - Mobile Broadcasting
Overview

Operational & Planned Systems Worldwide :
WorldSpace : 1st Satellite Digital Sound Broadcasting (S-DSB)
operator, with 2 operational L band (1.4 GHz) satellites (AfriStar &
AsiaStar) and a 3rd (AmeriStar) planned for launch in 2002
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Digital Systems DH and DS defined in Recommendation ITU-R BO.1130-4
XM Satellite Radio and Sirius Satellite Radio : each offers seamless
mobile services (SDARS1) throughout the USA in S band (2.3 GHz)
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Time magazine named XM a « 2001 Invention of the Year »
XM ’s technology is from WorldSpace
Mobile Broadcasting Corp. : recently announced plans to launch
satellite mobile broadcasting services in Japan in S band (2.6 GHz)
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Alcatel & WorldSpace, with Fraunhofer IIS as technology partner,
forming a consortium of industrial & multimedia players to provide L
band mobile broadcasting services to Europe starting in 2004
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1
SDARS :Satellite Digital Audio Radio Service, US/FCC term for
Satellite - Mobile Broadcasting
Markets and Services

Market Goals :
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Direct digital delivery of audio and multimedia content via satellite and
terrestrial means to consumers in a mobile environment
Seamless coverage solutions for national & international broadcasters
 Large number of channels
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Enhanced Broadcasting Services Will Include :
Real-time broadcasts and « push & store » services offering radio « on
demand » by local interactivity
 Unique, new formats to address niche markets
 Pan-European coverage with multilingual programs
 Multimedia services (telematics applications, video clips, weather, alert
messages, push IP solutions, news, traffic information...)
 Interactivity through cellular links
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Satellite - Mobile Broadcasting
Markets and Services (continued)

S-DSB is a Mass Market Application :
8 car & truck makers and 17 receiver makers currently factory-install
and/or manufacture S-DSB receivers for the US market
 Major surveys in the U.S.A. and Europe validate market for seamless
satellite/terrestrial radio services
 ASMS-TF (Advanced Satellite Mobile Systems - Task Force), backed
by ESA & the EC, has identified a significant market opportunity for
seamless European mobile multimedia & broadcasting services
 Interoperability is possible with DVB, DAB and Mobile Communication
Networks
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S-DSB Business Model :
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Multiple revenue streams including leasing, advertisements, and
subscription sales for new services
S-DSB System Concept

Introduction to Hybrid Concept

Comparison With Other Systems

Key Features
Hybrid System Approach
Spatial diversity (2 active) satellites for
better service availability
rural
area
urban
center
sub-urban
Terrestrial repeaters for
areas with low satellite
signal availability
Diversity combining of satellite
and (weak) terrestrial signal
Satellite offers large coverage areas
("European coverage")
High link margin to cope with tree
shadowing
S-DSB Hybrid Approach
Versus Other Systems
Spectrum
efficiency
DVB-T
(64-QAM)
High power efficiency
for Satellite waveform
Mobile reception for
terrestrial single
frequency networks
Allowed
delay
spread
DVB-T
EU147
S-DSBTERR
S-DSBTERR
DVB-T
(QPSK)
EU147
S-DSBSAT
DVB-S
Mobile reception of
satellite signals
DVB-S1
S-DSBSAT
Total power efficiency
(including power amplifier
efficiency)
Allowed vehicle
speed (L-Band)
1) Note: high vehicle speed is possible for
DVB-S in case of LOS reception
S-DSB System Features
Time Space Codes

The Information is Spread in Space and Time by:
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High Satellite Power
Efficiency
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Power Efficient Satellite Waveform / QPSK TDM
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Multipath Resistant
Terrestrial Waveform
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Good Eb/N0 performance (2.4dB for AWGN channel)
Low crest factor -> Efficient use of satellite power
Full Mobile Reception / OFDM
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High System Capacity
Long time interleaver
Spatial diversity using 2 satellites at different orbit
positions (optionally, system can use 1 Satellite only)
Efficient diversity combining technology
High Doppler spread
High delay spread
Efficient Source Coding

US SDARS systems: More than 200 audio programs
in 25MHz bandwidth
Interworking Between S-DSB
and DVB Standard
European Market is
Different from US Market

SDARS Systems Need Adaptation for European
Market
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Packetized Data Stream

Data Packets Concept is Already Used

MPEG 4 Based
DVB-S, DVB-C, DVB-T

Different marketing requirements (to be discussed
with DVB-CM)
Better synergy/interoperability with other systems
Compatibility with frequency planning (e.g. CEPT,
Wiesbaden conference) is a key requirement
Packet size can be adapted to MPEG transport
stream characteristics to make systems
compatible at multiplex layer
 High reuse of technology possible
 Short time-to-market
Streaming of Audio and Data is the Main
Application
S-DSB = DVB-“Satellite Mobile Broadcasting" ?
Satellite Mobile Broadcasting
Conclusion
Satellite Mobile Broadcasting Concept is Consistent
With the New DVB Vision (DVB v2)
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It Will Serve the Following Key Objectives:
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Enhanced mobile broadcasting services
National and pan European coverage
Mass market
Short time-to-market

It Will Benefit From Field Proven Technology Under Development Worldwide

Opportunity for DVB Project to initiate a Satellite Mobile Broadcasting Ad
Hoc Group

For Further Information Please Contact:
Christian Combe
Christian.Combe@space.alcatel.fr
Phone: +33 5 3435 5083
 Hugues Salord
hsalord@worldspace.com
Phone: +33 1 4284 3898
 Albert Heuberger
heb@iis.fhg.de
Phone: +49 9131 776 6300
Ernst Eberlein
ebl@iis.fhg.de
Phone: +49 9131 776 6320
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