1、 ETSI TR 101 540 V1.1.1 (2011-03)Technical Report Electromagnetic compatibilityand Radio spectrum Matters (ERM);System Reference document (SRdoc);DVB-H Small Gap FillersETSI ETSI TR 101 540 V1.1.1 (2011-03) 2Reference DTR/ERM-TG17-009 Keywords amplification, broadcasting, DVB-H, repeater ETSI 650 Ro
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8、 Association. ETSI ETSI TR 101 540 V1.1.1 (2011-03) 3Contents Intellectual Property Rights 4g3Foreword . 4g3Executive summary 4g3Introduction 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbrevia
9、tions . 7g34 Comments on the System Reference Document 7g34.1 Statements by ETSI Members 7g35 Presentation of the system or technology . 7g36 Market information. 8g37 Technical information 8g37.1 Detailed technical description 8g37.2 Technical parameters and implications on spectrum 10g37.2.1 Status
10、 of technical parameters 10g37.2.1.1 Current ITU and European Common Allocations . 10g37.2.1.2 Sharing and compatibility studies (if any) already available 11g37.2.1.3 Sharing and compatibility issues still to be considered . 11g37.2.2 Transmitter parameters . 11g37.2.2.1 Transmitter Output Power/Ra
11、diated Power 11g37.2.2.1a Antenna Characteristics 11g37.2.2.2 Operating Frequency . 11g37.2.2.3 Bandwidth . 12g37.2.2.4 Unwanted emissions 12g37.2.2.5 Maximum delay 14g37.2.3 Receiver parameters 15g37.3 Information on relevant standard(s) . 15g38 Radio spectrum request and justification . 15g39 Regu
12、lations . 15g39.1 Current regulations . 15g39.2 Proposed regulation and justification . 16g3Annex A: Bibliography 17g3History 18g3ETSI ETSI TR 101 540 V1.1.1 (2011-03) 4Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The in
13、formation 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 t
14、he 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 S
15、R 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 Ga
16、p 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 DV
17、B-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 thei
18、r 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 Fill
19、er 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 m2apartment). It can be modelled as consisting of two sections: A signal processing section (channel filtering and amplification). A signal monitor
20、ing 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 reduc
21、tion (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 U
22、HF band. A number of technical parameters are specified, as follows: The Maximum Effective Radiated Power is limited to 0 dBm (taking into account the aerials maximum nominal gain). The frequency response mask allows to selectively amplify a single DVB-H channel so as to provide sufficient rejection
23、 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 2160 MHz, 470790 MHz). DVB-H channels with 5 MHz, 6 MHz, 7 MHz or 8 MHz bandwidth can be retransmitted. Out-of-band emissions and spurious
24、 emissions are according to existing regulations. The maximum delay is 2,8 s, i.e. only a portion of the Guard Interval duration. ETSI ETSI TR 101 540 V1.1.1 (2011-03) 5The signal radiated by a DVB-H Small Gap Filler is identical to the signal received from the main DVB-H transmitter covering that a
25、rea, 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 impleme
26、nts 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
27、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 max
28、imum 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, whi
29、le 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.
30、 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
31、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
32、 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 fa
33、ll 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 t
34、o 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
35、 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 m2apartment. The DVB-H Small Gap Filler input is connected to aerials receiving authorised over-air emissions re
36、levant 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. analogu
37、e 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 ETSI TR 101 540 V1.1.1 (2011-03) 61 Scope T
38、he 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. Technic
39、al 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 docume
40、nt (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 lo
41、ng 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 use
42、r 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 Guidance
43、 for drafting an ETSI System Reference document (SRdoc)“. ETSI ETSI TR 101 540 V1.1.1 (2011-03) 73 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 fol
44、lowing two quality criteria fails on the demodulated output signal: 1) No detected erroneous TS packets during this 1 s interval; 2) Post-Viterbi BER 210-4measured over this 1 s interval. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: 2G Second Generat
45、ion 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 NormERP Effective Radiated Power GI Guard Interval MATV Master Antenna TV NIT Netwo
46、rk Information Table SFN Single Frequency NetworkTS Transport StreamTV 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 S
47、mall 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
48、 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 ETSI TR 101 540 V1.1.1 (2011-03) 8Th
49、ese 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 t
