1. LARCAN for DVB-T/H SOLUTION
LARCAN INC.
CANADA-2006
Home
Introduction
Set-up of a DVB-T/
H Network
DVB-T/H SOLUTION FOR FUTURE
Testing and
proofing the DVB-
H capability Catalin Popescu - 2006
Network
optimization and
quality control
Conclusion
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2. LARCAN for DVB-T/H SOLUTION
LARCAN INC.
CANADA-2006
The New Standard DVB-H
Home
Introduction • DVB-H is a new extension of the earlier standard DVB-T, which is used for
terrestrial digital TV broadcasting;
Set-up of a DVB-T/ • The new extension brings features that make it possible to receive digital video
H Network broadcast type services in a handheld, mobile terminal;
• DVB-H represent the convergence of the Mobile Radio (bidirectional
connections, point-to-point, using relatively low data rates) and Broadcasting
Testing and (unidirectional connection, point-to-multipoint, of identical content to a large
proofing the DVB- number of subscribers at relative high data rates);
H capability • The DVB-H solution purpose is to offer advantages of both systems (Mobile
Radio and Broadcasting);
• Both systems DVB-T and DVB-H can coexist and are strongly related on the
Network main core of the DVB transmission;
optimization and • The DVB-H networks architecture could look like a “sharing with DVB-T” or as
quality control a “dedicated DVB-H network”;
Conclusion
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3. LARCAN for DVB-T/H SOLUTION
LARCAN INC.
CANADA-2006
Introduction
Home • DVB-T System parameters include:
a) Fast Fourier Transform (FFT) length: 2K=1705 carriers; 8K=6817
Introduction carriers;
b) Carrier modulation (QPSK=2bit per carrier; 16-QAM=4bit per carrier;
Set-up of a DVB-T/ 64-QAM=6bit per carrier);
H Network c) Code Rate of Inner Error Protection (1/2, 2/3,3/4, 5/6, 7/8);
d) Guard Interval: (1/4, 1/8, 1/6, 1/32);
e) Non-hierarchical or hierarchical modulation and modulation parameter
Testing and ά;
proofing the DVB- • DVB-H System = DVB for handheld mobile terminals:
H capability a) New: 4K mode=3049 carriers with in de-depth time interleaving;
b) New: Time Slicing in the MPEG-2 transport stream;
Network c) New: IP packet transmission with FEC;
optimization and d) Cell ID;
quality control FOR MORE INFO...
Mr. Catalin Popescu, P. Eng. – Application Engineering, Manager
Phone: 905 564-9222 Fax: 905 564-9224
Conclusion
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4. LARCAN for DVB-T/H SOLUTION
LARCAN INC.
CANADA-2006
Set-up of DVB-T/H networks
Home •
–
Planning the DVB-T/H Networks can be done in few different ways:
In the same way as analog networks, using an individual set of radio frequencies
for each transmitter site. This approach is referred as a MFN;
–
Introduction Due to the fact of a delayed signals arriving within the Guard Interval can be
beneficial to a COFDM receiver, rather than interfering as with analogue signals, it
is possible, if a suitable frequency is available and a sufficient long guard interval is
Set-up of a DVB-T/ chosen for all transmitters in the region or in the country, to use the same frequency
in a SFN.
H Network – SFN techniques can be use on a smaller scale to fill gaps in coverage, or even
within a house where a domestic gap-filler could give portable reception;
• Setting-up DVB-T/H transmitters :
Testing and – The digital Transmitters can re-use the same site as existing analog TV transmitters
proofing the DVB- so large part of the existing infrastructure can re-used. In some cases new antenna
H capability systems will be needed; if the existing antenna it has to be used, than the digital
signals has to combine at high power, with the existing analog signals; Different
filtering and non-linearity problems arise in each of these cases;
Network • Setting-up DVB-T/H Distribution Networks:
optimization and – In general a digital primary distribution network will be necessary to distribute
quality control MPEG-2-TS from TV studios/Media centers to re-multiplexing sites if the network
has regional variations and to the transmitters;
– Possible choices are: optical fiber; PDH or SDH networks, ATM and satellite
distribution;
– Timing of the primary distribution has to be controlled (no induced jitter in
MPEG-2 decoders) and to ensure stable synchronization of the MPEG-2
Conclusion multiplexers and COFDM modulators;
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5. LARCAN for DVB-T/H SOLUTION
LARCAN INC.
CANADA-2006
Set-up of DVB-T/H networks
Home – Each piece of equipment in the programme chain will have a control input to
change modes, bit-rates, etc. All sites, therefore, will need to be linked by a Control
and Monitoring Network.
• SFN Operation:
Introduction – All transmitters in a SFN have to be synchronized so that their emitted signals are
frequency identically and bit identical; SFN requires a special equipment in the
Set-up of a DVB-T/ primary distribution network to ensure a synchronization using an universal
time and frequency reference such as the one available from the GPS satellite
H Network system;
• Field Network tests and optimization:
– Digital service coverage is characterized by the as called” cliff effect” = a very
Testing and rapid transition from a perfect reception to no reception at all.
proofing the DVB- – For defining and improving the coverage area for each reception condition:
H capability • Fixed outdoor/indoor reception;
• Portable indoor (low Doppler values,<10Hz);
• Portable Outdoor reception;
Network • Mobile Outdoor (High Doppler values, >10Hz);
optimization and Minimum field strength considerations and different theoretical model channel
quality control profiles (propagation channel profiles) are considered.
– Frequency Handover simulation and test in a MFN is that component that will
allow receivers to discover the DVB-H service on a alternative frequencies in a
adjacent transmission cells.
Conclusion
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6. LARCAN for DVB-T/H SOLUTION
LARCAN INC.
CANADA-2006
Testing and Proofing the
DVB-H capability
Home •
1.
Overview DVB-H Measurements:
Base units addressing the “broadcast performance” are:
• Power level;
Introduction • Frequency channel;
• Display of spectrum and channel mask measurements;
•
Set-up of a DVB-T/ •
MER, BER and EVM ;
C/N level;
H Network Analyze and display of the TPS information:
• Constellation Diagram;
• Bandwidth;
Testing and • FFT mode;
proofing the DVB- • Code Rate;
H capability • Guard Interval;
• Alpha parameter;
• Cell ID;
Network 2. Data Broadcast Analysis:
optimization and • INT table analysis;
•
quality control Time slicing (correctness, relation between Burst Size, Off Time and the use
of bandwidth ) and PID distribution;
• MPE analyze;
• Data rate measurements;
• FEC evaluation and error detection;
• Timing Measurements;
Conclusion
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7. LARCAN for DVB-T/H SOLUTION
LARCAN INC.
CANADA-2006
Network optimization and
Quality control
Home • DVB-H is using the DVB-T technology in order to provide cost-effective broadcast
orientated data services. But, the DVB-H is also offering services based on subscriptions
and fees. Therefore further monitoring, testing and quality control functions are
Introduction reasonable to develop:
1. Analysis and checks of the subscriber management;
Set-up of a DVB-T/ 2. Analysis of the behavior of DVB-H networks in terms of a very high dynamic
allocation, service requests, activations and release of data connections and services
H Network (service orientated statistics and information);
3. Collection of information for billing and accounting for a valid and fair charging of
service providers and users;
Testing and 4. Creation of monitoring and reference reception sites for online analysis of the
proofing the DVB- transmission quality, problems, also with the capability to control processes and
H capability parameters on the transmission side;
5. Extended Field measurements of the coverage area and mobile reception using
parameters like: MPE-FEC error correction, time slicing, 4K and in-depth
Network interleaver, speed of movement, hand-over, etc;
optimization and
quality control
Conclusion
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8. LARCAN for DVB-T/H SOLUTION
LARCAN INC.
CANADA-2006
Conclusion
Home
• Secured investment:
Introduction – Design and realize DVB-H solutions;
– Complete portfolio for a DVB-H solution;
Set-up of a DVB-T/
H Network
• Competence is our strength and the key for your success:
– We are leader in the market of digital transmitters solution
Testing and providers;
proofing the DVB- – We drive the DVB-H implementation technology;
H capability
Network
optimization and LARCAN:
quality control
THE SOLUTION FOR YOUR MOBILE
ENTERTAIMENT REQUIREMENTS
Conclusion
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