ETSI TR 101 540 V1.1.1 (2011-03)

Electromagnetic compatibility and Radio spectrum Matters (ERM); System Reference document (SRdoc); DVB-H Small Gap Fillers

DTR/ERM-TG17-009

General Information

• Status: Published
• Publication Date: 10-Mar-2011
• Technical Committee: ERM TG17 - ERM Standards for PMSE and broadcast equipment/services
• Current Stage: 12 - Completion
• Due Date: 16-Mar-2011
• Completion Date: 11-Mar-2011

Standards Content (Sample)

Technical Report
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
System Reference document (SRdoc);
DVB-H Small Gap Fillers
2 ETSI TR 101 540 V1.1.1 (2011-03)

Reference
DTR/ERM-TG17-009
Keywords
amplification, broadcasting, DVB-H, repeater
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© European Telecommunications Standards Institute 2011.
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ETSI
3 ETSI TR 101 540 V1.1.1 (2011-03)
Contents
Intellectual Property Rights . 4
Foreword . 4
Executive summary . 4
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 7
4 Comments on the System Reference Document . 7
4.1 Statements by ETSI Members . 7
5 Presentation of the system or technology . 7
6 Market information. 8
7 Technical information . 8
7.1 Detailed technical description . 8
7.2 Technical parameters and implications on spectrum . 10
7.2.1 Status of technical parameters . 10
7.2.1.1 Current ITU and European Common Allocations . 10
7.2.1.2 Sharing and compatibility studies (if any) already available . 11
7.2.1.3 Sharing and compatibility issues still to be considered . 11
7.2.2 Transmitter parameters . 11
7.2.2.1 Transmitter Output Power/Radiated Power . 11
7.2.2.1a Antenna Characteristics . 11
7.2.2.2 Operating Frequency . 11
7.2.2.3 Bandwidth . 12
7.2.2.4 Unwanted emissions. 12
7.2.2.5 Maximum delay . 14
7.2.3 Receiver parameters . 15
7.3 Information on relevant standard(s) . 15
8 Radio spectrum request and justification . 15
9 Regulations . 15
9.1 Current regulations . 15
9.2 Proposed regulation and justification . 16
Annex A: Bibliography . 17
History . 18

ETSI
4 ETSI TR 101 540 V1.1.1 (2011-03)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Report (TR) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio
spectrum Matters (ERM).
Executive summary
DVB-H Small Gap Fillers are low power on-channel repeaters of a DVB-H multiplex, with the aim of improving
domestic indoor reception in areas where outdoor reception is available.
Consumers of mobile TV services, now familiar with the user experience of 2G/3G, are likely to expect good indoor
coverage also for DVB-H. However, indoor reception of DVB-H services, especially in urban areas, in the lower floors
and if using receivers with integrated antenna, requires high levels of e.m. field strength. To achieve this goal, DVB-H
Small Gap Fillers can be adopted.
These devices are installed by the users in their apartments and are intended to be connected to a roof-top antenna,
e.g. via a direct cable in a single private house, or using the existing in-building cable distribution system (MATV
network) in a multi-apartment building. Each apartment is supposed to use their own device.
A DVB-H Small Gap Filler is essentially a filtered amplifier, whose purpose is to boost a specific DVB-H signal to
improve its field strength in the target coverage area (100 m apartment). It can be modelled as consisting of two
sections:
• A signal processing section (channel filtering and amplification).
• A signal monitoring section, using a built-in DVB-H receiver for quality monitoring of the output signal and
for verification that the input signal is a valid DVB-H signal. This section includes an automatic power control
mechanism based on the measured signal quality, with the task of imposing a proper power reduction (or
switch-off) in case of problems.
A Technical Specification regulating such devices is required, to guarantee that no disturbance can be caused to the
reception of the same DVB-H service or to other services, e.g. traditional TV services (i.e. analogue TV, DVB-T,
CATV) also received in the UHF band. A number of technical parameters are specified, as follows:
• The Maximum Effective Radiated Power is limited to 0 dBm (taking into account the aerial's maximum
nominal gain).
• The frequency response mask allows to selectively amplify a single DVB-H channel so as to provide sufficient
rejection of unwanted adjacent channels, which should not be amplified to a much higher level
• The DVB-H Small Gap Filler receives and transmits on UHF band IV/V (channels 21÷60 MHz,
470÷790 MHz). DVB-H channels with 5 MHz, 6 MHz, 7 MHz or 8 MHz bandwidth can be retransmitted.
• Out-of-band emissions and spurious emissions are according to existing regulations.
• The maximum delay is 2,8 µs, i.e. only a portion of the Guard Interval duration.
ETSI
5 ETSI TR 101 540 V1.1.1 (2011-03)
The signal radiated by a DVB-H Small Gap Filler is identical to the signal received from the main DVB-H transmitter
covering that area, with a delay kept well below the Guard Interval duration, therefore the two COFDM signals radiated
by the main DVB-H transmitter and by the DVB-H Small Gap Filler sum coherently as in an SFN network, without the
risk of interference in any reception condition.
The DVB-H Small Gap Filler implements features to monitor the signal quality according to specific criteria and take
proper actions when needed, by reducing the output power level, and consequently limiting the coverage. This
guarantees that only an error-free DVB-H signal is being retransmitted, avoiding the risk of retransmitting a bad quality
signal, caused i.e. by degradation in the source signal quality, failure in the device electronics, or self-oscillation
conditions due to poor shielding of the home network components,
The automatic output power control mechanism allows the DVB-H Small Gap Filler to transmit at the maximum
achievable output power level, under the constraint of satisfying the signal quality criteria. This mechanism is based on
a signal monitoring section and an output level control section. In normal conditions, the output power level adjustment
takes place only at the switch-on of the device, while after the transient period the output power should stay constant
(and corresponding to the maximum ERP in optimal environments). Anyway, the DVB-H Small Gap Filler
continuously monitors the signal quality in order to activate the power control mechanism as soon as signal impairments
are detected. It is required that, in case of serious quality impairments (e.g. oscillation or loss of a valid input DVB-H
signal), the DVB-H Small Gap Filler is able to take proper actions to avoid radiating an errored signal (i.e. reducing the
output power properly, or switching off if needed) in no more than 5 seconds.
No change in the radio spectrum allocation is required, as only a legitimate DVB-H signal, already broadcast in the
same area by a licensed network operator, is re-radiated by the device on the same frequency in a non-interfering way
(SFN). It is requested that the DVB-H Small Gap Fillers be unlicensed devices so that final users are authorised to
install such low-power devices, re-radiating a legitimate DVB-H signal in the licensed UHF channel. The devices do
not easily fall into an existing category due to their broadcast nature, but the authors would request that these devices
fall into the category of SRD and appear in ERC/REC 70-03 [i.4] in a similar way to the low power FM devices in
annex 13 of ERC/REC 70-03 [i.4]. However, it will be for CEPT and individual Administrations to define their status.
Therefore, a Technical Specification for DVB-H Small Gap Fillers, according to [i.1], is proposed as a new harmonised
EN.
Introduction
The present document has been developed to support the co-operation between ETSI and the Electronic
Communications Committee (ECC) of the European Conference of Post and Telecommunications Administrations
(CEPT).
DVB-H Small Gap Fillers are low power on-channel repeaters of a DVB-H multiplex, with the aim of improving
domestic indoor reception in areas where outdoor reception is available. Target coverage of the device is a 100 m
apartment. The DVB-H Small Gap Filler input is connected to aerials receiving authorised over-air emissions relevant
to that specific usage area: this ensures that only authorised signals can be re-radiated by the device. Moreover, the
radio spectrum characteristics of the device are specified so that no disturbance can be caused to the reception of other
services, e.g. traditional TV services (i.e. analogue TV, DVB-T, CATV) also received in the UHF band.
Status of pre-approval draft
Target version Pre-approval date version
(see note)
V1.1.1 a s m Date Description
0.0.1 February 2010 Initial draft version
NOTE: See clause A.2 of EG 201 788 (V2.1.1) [i.5].

ETSI
6 ETSI TR 101 540 V1.1.1 (2011-03)
1 Scope
The present document describes the DVB-H Small Gap Fillers intended for consumer use. These devices are low-power
on-channel repeaters of a DVB-H multiplex, with the aim of improving indoor reception in areas where outdoor
reception is available.
It includes in particular:
• Market information.
• Technical information.
• Regulatory issues.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
Not applicable.
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EN 301 558: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Digital
Video Broadcasting (DVB); Technical Specifications for DVB-H Small Gap Fillers; Harmonized
EN covering the essential requirements of article 3.2 of the R&TTE Directive".
[i.2] CEPT/ERC/Recommendation 74-01E: "Unwanted Emissions in the Spurious Domain".
[i.3] CELTIC B21C Project: "Validation of DVB-H Small Gap Fillers".
[i.4] CEPT/ERC/Recommendation 70-03: "Relating to the use of Short Range Devices (SRD)".
[i.5] ETSI EG 201 788 (V2.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Guidance for drafting an ETSI System Reference document (SRdoc)".
ETSI
7 ETSI TR 101 540 V1.1.1 (2011-03)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
erroneous second: a particular one-second interval when any of the following two quality criteria fails on the
demodulated output signal:
1) No detected erroneous TS packets during this 1 s interval;
-4
2) Post-Viterbi BER ≤ 2·10 measured over this 1 s interval.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
2G Second Generation
3G Third Generation
BER Bit Error Rate
CATV CAble TV
COFDM Coded Orthogonal Frequency Division Multiplexing
DVB Digital Video Broadcasting
DVB-H DVB Handheld
DVB-T DVB Terrestrial
e.m. Electromagnetic
EN European Norm
ERP Effective Radiated Power
GI Guard Interval
MATV Master Antenna TV
NIT Network Information Table
SFN Single Frequency Network
TS Transport Stream
TV TeleVision
UHF Ultra-High Frequency
4 Comments on the System Reference Document
There were no comments received.
4.1 Statements by ETSI Members
There were no statements received.
5 Presentation of the system or technology
DVB-H Small Gap Fillers are low power on-channel repeaters of a DVB-H multiplex, with the aim of improving
domestic indoor reception in areas where outdoor reception is available.
Consumers of mobile TV services, now familiar with the user experience of 2G/3G, are likely to expect good indoor
coverage also for DVB-H. However, indoor reception of DVB-H services, especially in urban areas, in the lower floors
and if using receivers with integrated antenna, requires high levels of e.m. field strength. To achieve this goal, DVB-H
Small Gap Fillers can be adopted.
ETSI
8 ETSI TR 101 540 V1.1.1 (2011-03)
These devices are installed by the users in their apartments and are intended to be connected to a roof-top antenna,
e.g. via a direct cable in a single private house, or using the existing in-building cable distribution system (MATV
network) in a multi-apartment building. Each apartment is supposed to use their own DVB-H Small Gap Filler.
The signal radiated by a DVB-H Small Gap Filler is identical to the signal received from the main DVB-H transmitter
covering that area, with a delay kept well below the Guard Interval duration, therefore the two COFDM signals radiated
by the main DVB-H transmitter and by the DVB-H Small Gap Filler sum coherently as in an SFN network, without the
risk of interference in any reception condition.
The radio spectrum characteristics of the device are specified in terms of maximum ERP, frequency response,
maximum delay, out-of-band emissions, etc. so that no disturbance can be caused to the reception of the same DVB-H
service or to other services, e.g. traditional TV services (i.e. analogue TV, DVB-T, CATV) also received in the UHF
band.
DVB-H Small Gap Fillers are consumer-grade products, intended to be installed by the final user, without the help of a
professional installer. Therefo
...