1、 ETSI TS 102 992 V1.1.1 (2010-09)Technical Specification Digital Video Broadcasting (DVB);Structure and modulation of optionaltransmitter signatures (T2-TX-SIG) for use withthe DVB-T2 second generation digital terrestrialtelevision broadcasting systemETSI ETSI TS 102 992 V1.1.1 (2010-09)2Reference D
2、TS/JTC-DVB-284 Keywords broadcasting, digital, DVB, terrestrial, TV ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803
3、/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference versi
4、on is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of stat
5、us. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notificat
6、ion No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2010. European Broadcasting Union 2010. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONT
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8、ers and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 102 992 V1.1.1 (2010-09)3Contents Intellectual Property Rights 5g3Foreword . 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative referen
9、ces 6g33 Definitions, symbols and abbreviations . 7g33.1 Definitions 7g33.2 Symbols 8g33.2.1 Symbols relating to auxiliary-stream signature method 8g33.2.2 Symbols relating to FEF-based signature method 8g33.3 Abbreviations . 9g34 General description. 9g34.1 Context . 9g34.2 General principles. 10g3
10、5 Transmitter signature using auxiliary streams 11g35.1 General description. 11g35.2 How the auxiliary streams are formed 12g35.3 Special considerations for MISO 14g35.4 L1 signalling for TX-SIG auxiliary streams . 14g35.4.1 Configurable L1-post signalling . 14g35.4.2 Dynamic L1-post signalling 15g3
11、6 Transmitter signature using FEFs . 15g36.1 General description. 15g36.2 The P1 symbol in the signature FEF part . 17g36.3 The other-use period . 17g36.4 The first and second signature periods . 17g36.5 The set of eight discrete sequences. 18g36.5.1 General 18g36.5.2 The initial perfect sequence 18
12、g36.5.3 The Hadamard sequences . 19g36.5.4 The intermediate set of GO sequences 19g36.5.5 The final set of GO sequences 19g36.6 The band-limited waveforms 20g36.6.1 General 20g36.6.2 The 64K DFT 21g36.6.3 The filtering window and its application 21g36.7 Modulation - the emitted waveform . 21g3Annex
13、A (informative): Examples of the construction of the sequences and waveforms of the signature-FEF. 23g3A.1 Example values of the sequence construction 23g3A.1.1 The Frank perfect sequence 23g3A.1.2 The set of discrete sequences . 23g3A.2 Example code for sequence generation and filtering 25g3A.2.1 C
14、ode written in Mathematica . 25g3A.2.1.1 Preliminary definitions . 25g3A.2.1.2 Use definitions to make the set of sequences 26g3A.2.1.3 Band-limiting to make set of waveforms 26g3A.2.2 Code written in MATLAB . 27g3Annex B (informative): Using the signature-FEF for measurements 28g3ETSI ETSI TS 102 9
15、92 V1.1.1 (2010-09)4B.1 Introduction 28g3B.2 Nature of the FEF-based transmitter signature . 28g3B.3 Measuring the channel impulse response . 29g3B.3.1 Basics . 29g3B.3.1.1 Conventional OFDM pilot-based measurements (e.g. DVB-T2) 29g3B.3.1.2 Using the signature waveform with a single transmitter . 2
16、9g3B.3.2 Using the signature waveforms in a small SFN 30g3B.3.3 Using the signature waveforms in a larger SFN . 30g3History 32g3ETSI ETSI TS 102 992 V1.1.1 (2010-09)5Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The infor
17、mation 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
18、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 0
19、00 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by Joint Technical Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Europen de Normalisation EL
20、ECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to co-ordinate the drafting of standards in the specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body b
21、y including in the Memorandum of Understanding also CENELEC, which is responsible for the standardization of radio and television receivers. The EBU is a professional association of broadcasting organizations whose work includes the co-ordination of its members activities in the technical, legal, pr
22、ogramme-making and programme-exchange domains. The EBU has active members in about 60 countries in the European broadcasting area; its headquarters is in Geneva. European Broadcasting Union CH-1218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 The Digital Video Broa
23、dcasting Project (DVB) is an industry-led consortium of broadcasters, manufacturers, network operators, software developers, regulatory bodies, content owners and others committed to designing global standards for the delivery of digital television and data services. DVB fosters market driven soluti
24、ons that meet the needs and economic circumstances of broadcast industry stakeholders and consumers. DVB standards cover all aspects of digital television from transmission through interfacing, conditional access and interactivity for digital video, audio and data. The consortium came together in 19
25、93 to provide global standardisation, interoperability and future proof specifications. ETSI ETSI TS 102 992 V1.1.1 (2010-09)61 Scope The present document describes an optional extension to the DVB-T2 second-generation transmission system for digital terrestrial television broadcasting, as specified
26、 in 1. This extension takes the form of the addition of transmitter-signature information, and is primarily intended for use in single-frequency networks (SFNs). The extension is made in ways which are fully compatible with the original specification by exploiting some of its explicit provisions for
27、 future expansion. The primary purpose of the addition of transmitter-signature information described herein is to assist network operators with the setting-up, maintenance, monitoring and fault-finding of their networks, by making it possible to identify the individual contributions of different tr
28、ansmitters within a single-frequency network. However, once it is present the transmitter-signature information could also be used for other purposes, e.g. applications requiring location information. The present document specifies the details of the additional signals, and must be read in conjuncti
29、on with the DVB-T2 specification 1 for full understanding. In order to accommodate different purposes, and different scales of networks, various options are provided; network operators can select from them to suit their requirements. 2 References References are either specific (identified by date of
30、 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 availa
31、ble 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 a
32、pplication of the present document. 1 ETSI EN 302 755: “Digital Video Broadcasting (DVB); Frame Structure channel coding and modulation for a second generation digital terrestrial television broadcasting system (DVB-T2)“. 2.2 Informative references The following referenced documents are not necessar
33、y for the application of the present document but they assist the user with regard to a particular subject area. i.1 FAN P. (2004): “Spreading sequence design and theoretical limits for quasisynchronous CDMA systems“. EURASIP Journal on Wireless Communications and Networking2004:1, 19-31. NOTE: Avai
34、lable from: http:/ i.2 ZENG, X., HU, L., and LIU, Q, (2005): “New sequence sets with zero-correlation zone“. NOTE: Available from: http:/arxiv.org/abs/cs/0508115. i.3 The MathWorks, Inc.: “MATLAB“. NOTE: Available at: http:/ i.4 Wolfram Inc.: “Mathematica“. NOTE: Available at: http:/. ETSI ETSI TS 1
35、02 992 V1.1.1 (2010-09)73 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: auxiliary cell: cell in an auxiliary stream auxiliary stream: sequence of cells carrying data of as yet undefined modulation and codin
36、g, which may be used for future extensions or as required by broadcasters or network operators B cell: auxiliary cell in a transmitter-signature auxiliary stream in which energy is radiated in order to keep the mean power of each OFDM symbol at a particular value cyclic prefix: prefix attached to a
37、waveform segment, comprising a copy of part of the waveform segment, such that the whole has cyclic properties NOTE: The guard interval in an OFDM system commonly takes the form of a cyclic prefix. In the context of the present document, cyclic prefixes are added in the construction of signature per
38、iods in signature FEF parts. discrete sequence: sequence of numbers FEF part: part of the super-frame between two T2-frames which contains FEFs NOTE: A FEF part always starts with a P1 symbol. The remaining contents of the FEF part should be ignored by a DVB-T2 receiver. generalised orthogonality: p
39、roperty of a set of discrete sequences whereby they are mutually orthogonal, both directly, and when they are mutually cyclically shifted, provided the cyclic shift is limited to a range known as the zero correlation zone L1-post signalling: signalling carried in the P2 symbol of T2-frames (see 1) c
40、onveying more detailed L1 information about the T2 system and the PLPs perfect sequence: discrete sequence which has a cyclic autocorrelation function which is zero for all (cyclic) offsets except zero signature FEF part: FEF part which is used to carry a transmitter signature of the type defined in
41、 clause 6, comprising a P1 symbol, an optional other-use period and two signature periods signature period: section of a signature FEF part comprising a signature waveform and its cyclic prefix signature waveform: band-limited waveform constructed from one of the GO sequences sh,i, according to clau
42、se 6 T cell: auxiliary cell in a transmitter-signature auxiliary stream in which energy is radiated by a particular transmitter in order to signal its presence transmitter signature: component added to a radiated signal in order to enable identification of the source transmitter NOTE: The present do
43、cument defines two types of transmitter signature for use with DVB-T2 signals. Z cell: auxiliary cell in a transmitter-signature auxiliary stream in which no energy is radiated by a particular transmitter, since the same cell is used as a T cell by a different transmitter zero correlation zone: rang
44、e of possible offsets over which a GO sequence has desirable correlation properties, as described in clause 6.5.1 ETSI ETSI TS 102 992 V1.1.1 (2010-09)83.2 Symbols For the purposes of the present document, the following symbols apply. 3.2.1 Symbols relating to auxiliary-stream signature method bBS ,
45、 jbit value in DVB-T2 BB scrambling sequence having index j j integer index of positions in BB scrambling sequence (bBS , jabove) K total number of cells in the transmitter-signature auxiliary stream L number of T2 frames per TX-SIG frame, within which the cycle of cell positions in the auxiliary st
46、ream repeats M number of transmitters which can be signalled N number of cells in the auxiliary stream per transmitter per frame P integer in range 0 to 1023 inclusive to which K and M are related Q integer in range 0 to 15 inclusive to which N is related xm,l, pcomplex cell modulation value for cel
47、l index p of OFDM symbol l of T2-frame m 3.2.2 Symbols relating to FEF-based signature method cl, k the complex modulation value for carrier k in signature period l cqvalue of element of Frank sequence having index q d parameter of Zengs section-III.C method i.2 the duration of the signature cyclic
48、prefix, =14546T fcthe centre frequency of the emitted RF signal hinteger index of sequence, in range 0 to 7 j 1 KHthe index value 27 264 p1t()the P1 waveform as defined in clause 9.8.2.4 of 1 the waveform emitted during the other-use period, if present rijncyclic cross-correlation between discrete s
49、equences i and j for an offset of n samples (becomes auto-correlation when i = j) S the final set of GO sequences S = s0,s1,Ls7 , each sequence shhaving elements sh, iT elementary time period for the bandwidth in use (as in 1) TFEFduration of FEF part TOUduration of other-use period TSthe total duration of one signature period, TS= TU+=80082T TUthe duration of one signature waveform, TU= 65536T Vh, kvalue of discrete spectrum of sequen
