ETSI EN 300 748 V1.1.2 (1997-08)

Digital Video Broadcasting (DVB); Multipoint Video Distribution Systems (MVDS) at 10 GHz and above

REN/JTC-DVB-68

Digitalna videoradiodifuzija (DVB) – Večtočkovni video distribucijski sistem na 10 GHz in nad 10 GHz

General Information

• Status: Published
• Publication Date: 19-Aug-1997
• Technical Committee: BROADCAS - EBU/CENELEC/ETSI on Broadcasting
• Current Stage: 12 - Completion
• Due Date: 29-Aug-1997
• Completion Date: 20-Aug-1997
• Mandate: T-304
• Ref Project: SIST EN 300 748 V1.1.2:2003 - Digital Video Broadcasting (DVB); Multipoint Video Distribution Systems (MVDS) at 10 GHz and above

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital Video Broadcasting (DVB); Multipoint Video Distribution Systems (MVDS) at 10 GHz and above33.170Televizijska in radijska difuzijaTelevision and radio broadcastingICS:Ta slovenski standard je istoveten z:EN 300 748 Version 1.1.2SIST EN 300 748 V1.1.2:2003en01-december-2003SIST EN 300 748 V1.1.2:2003SLOVENSKI
STANDARD



SIST EN 300 748 V1.1.2:2003



European Telecommunications Standards Institute EN 300 748 V1.1.2 (1997-08)European Standard (Telecommunications series)Digital Video Broadcasting (DVB);Multipoint Video Distribution Systems (MVDS)at 10 GHz and aboveEBUUEREuropean Broadcasting UnionUnion Européenne de Radio-TélévisionSIST EN 300 748 V1.1.2:2003



EN 300 748 V1.1.2 (1997-08)2ReferenceREN/JTC-00DVB-68 (6xc00idc.PDF)KeywordsDVB, digital, video, broadcasting, MPEG, TV,multipointETSI SecretariatPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/88X.400c= fr; a=atlas; p=etsi; s=[e-mail]://www.etsi.frCopyright NotificationNo 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 1997.© European Broadcasting Union 1997.All rights reserved.SIST EN 300 748 V1.1.2:2003



EN 300 748 V1.1.2 (1997-08)3ContentsIntellectual Property Rights.4Foreword.41Scope.52Normative references.53Symbols and abbreviations.63.1Symbols.63.2Abbreviations.64Transmission system.74.1System definition.74.2Adaptation to MVDS transmitter characteristics.84.3Interfacing.84.4Channel coding.94.4.1Transport multiplex adaptation and randomization for energy dispersal.94.4.2Outer coding (Reed-Solomon), interleaving and framing.104.4.3Inner coding (convolutional).124.5Baseband shaping and modulation.135Error performance requirements.14Annex A (normative):Signal spectrum at the modulator output.15Annex B (informative):Conceptual system description.17Annex C (informative):Examples of bit rates versus MVDS transmitter bandwidth.19Annex D (informative):Examples of possible use of the System.20Annex E (informative):Bibliography.21History.22SIST EN 300 748 V1.1.2:2003



EN 300 748 V1.1.2 (1997-08)4Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin ETR 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect ofETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSIWeb server (http://www.etsi.fr/ipr).Pursuant to the ETSI Interim 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 ETR 314 (or the updates onhttp://www.etsi.fr/ipr) which are, or may be, or may become, essential to the present document.ForewordThis second edition, previously as an ETS now an EN, contains changes of an entirely editorial nature as follows:1)add the DVB logo to the front page of the deliverable;2)change the title from: "Digital broadcasting systems for television, sound and data services; etc." to"Digital Video Broadcast (DVB); etc.";3)add in the foreword the DVB acknowledgement.This European Standard (Telecommunications series) has been produced by the Joint Technical Committee (JTC) of theEuropean Broadcasting Union (EBU), Comité Européen de Normalisation ELECtrotechnique (CENELEC) and theEuropean Telecommunications Standards Institute (ETSI).NOTE:The EBU/ETSI JTC was established in 1990 to co-ordinate the drafting of standards in the specific fieldof broadcasting and related fields. Since 1995 the JTC became a tripartite body by including in theMemorandum of Understanding also CENELEC, which is responsible for the standardization of radio andtelevision receivers. The EBU is a professional association of broadcasting organizations whose workincludes the co-ordination of its members' activities in the technical, legal, programme-making andprogramme-exchange domains. The EBU has active members in about 60 countries in the Europeanbroadcasting area; its headquarters is in Geneva *.*European Broadcasting UnionCase Postale 67CH-1218 GRAND SACONNEX (Geneva)SwitzerlandTel:[phone]Fax:[phone]Digital Video Broadcasting (DVB) ProjectFounded in September 1993, the DVB Project is a market-led consortium of public and private sector organizations inthe television industry. Its aim is to establish the framework for the introduction of MPEG-2 based digital televisionservices. Now comprising over 200 organizations from more than 25 countries around the world, DVB fosters market-led systems, which meet the real needs, and economic circumstances, of the consumer electronics and the broadcastindustry.Proposed national transposition datesDate of adoption of this EN:18 October 1996Date of latest announcement of this EN (doa):31 January 1997Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 July 1997Date of withdrawal of any conflicting National Standard (dow):31 July 1997SIST EN 300 748 V1.1.2:2003



EN 300 748 V1.1.2 (1997-08)51ScopeThe present document describes the modulation and channel coding system (denoted the "System" for the purposes of thepresent document) for the distribution of digital multi-programme Television (TV) / High Definition Television (HDTV) byMultipoint Video Distribution Systems (MVDS) in the 40 GHz band. The System described in the present document isbased on that described in EN 300 421 for 11/12 GHz satellite services (see annex E, bibliography).It allows the same consumer Integrated Receiver Decoder (IRD) to be used for either service, when used with a Low NoiseBlock (LNB) down-converter for the appropriate frequency band.The frequency band 40,5 to 42,5 GHz has been harmonized within the European Conference of Post andTelecommunications Administrations (CEPT) under Recommendation T/R 52-01.The System however, is applicable to other frequency bands above 10 GHz.The System uses Quaternary Phase Shift Keying (QPSK) modulation and concatenated error protection strategy based on aconvolutional code and shortened Reed-Solomon (RS) code.The System is suitable for use on different MVDS transmitter bandwidths.Compatibility with Moving Pictures Experts Group - 2 (MPEG-2) coded TV services (see ISO/IEC 13818-1 [1]),with a transmission structure synchronous with the packet multiplex, is provided.Exploitation of the multiplex flexibility allows the use of the transmission capacity for a variety of TV serviceconfigurations, including sound and data services.All service components are Time Division Multiplexed (TDM) on a single digital carrier.The present document:-gives a general description of the System for MVDS digital TV transmission;-specifies the digitally modulated signal in order to allow compatibility between pieces of equipment developed bydifferent manufacturers. This is achieved by describing in detail the signal processing principles at the modulatorside, while the processing at the receive side is left open to different implementation solutions. However, it isnecessary in the present document to refer to certain aspects of reception;-identifies the global performance requirements and features of the System, in order to meet the service qualitytargets.2Normative referencesReferences may be made to:a)specific versions of publications (identified by date of publication, edition number, version number, etc.), inwhich case, subsequent revisions to the referenced document do not apply; orb)all versions up to and including the identified version (identified by "up to and including" before the versionidentity); orc)all versions subsequent to and including the identified version (identified by "onwards" following the versionidentity); ord)publications without mention of a specific version, in which case the latest version applies.A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[1]ISO/IEC 13818-1 (November 1994): "Coding of moving pictures and associated audio".[2]Forney, G.D. IEEE Trans. Comm. Tech., COM-19, pp. 772-781, (October 1971): "Burst-correcting codes for the classic bursty channel".[3]Intelsat Earth Station Standards (IESS) No. 308, revision 6 (26 October 1990): "Performancecharacteristics for Intermediate Data Rate (IDR) digital carriers".SIST EN 300 748 V1.1.2:2003



EN 300 748 V1.1.2 (1997-08)63Symbols and abbreviations3.1SymbolsFor the purposes of the present document, the following symbols apply:aroll-off factorC/NSignal-to-Noise ratiodfreeconvolutional code free distanceEb/N0ratio between the energy per useful bit and twice the noise power spectral densityfNNyquist frequencyG1,G2convolutional code generatorsg(x)RS code generator polynomialIInterleaving depth (bytes)I, QIn-phase, Quadrature phase components of the modulated signaljbranch index of the interleaverKconvolutional code constraint lengthMconvolutional interleaver branch depth for j = 1, M = N/INerror protected frame length (bytes)p(x)RS field generator polynomialrmin-band ripple (dB)Rssymbol Rate corresponding to the bilateral Nyquist bandwidth of the modulated signalRuuseful bit Rate after MPEG-2
transport multiplexerRu'bit rate after RS outer coderTnumber of bytes which can be corrected in RS error protected packetTssymbol periodX,Ydi-bit stream after rate 1/2 convolutional coding3.2AbbreviationsFor the purposes of the present document, the following abbreviations apply:AWGNAdditive White Gaussian NoiseBBBaseBandBERBit Error RatioBSSBroadcast Satellite ServiceBWBandWidthCCITTInternational Telegraph and Telephone Consultative Committee (now ITU-T)DTHDirect To HomeFDMFrequency Division MultiplexFECForward Error CorrectionFIFOFirst-In, First-Out shift registerFIRFinite Impulse ResponseFSSFixed Satellite ServiceHDTVHigh Definition TeleVisionHEXHEXadecimal notationIFIntermediate FrequencyIMUXInput MUltipleXer - filterIRDIntegrated Receiver DecoderMPEGMoving Pictures Experts GroupMSBMost Significant BitMUXMUltipleXMVDSMultipoint Video Distribution SystemOBOOutput Back OffOCTOCTal notationOMUXOutput MUltipleXer - filterPPuncturingPDHPlesiochronous Digital HierarchySIST EN 300 748 V1.1.2:2003



EN 300 748 V1.1.2 (1997-08)7PRBSPseudo Random Binary SequencePSKPhase Shift KeyingQEFQuasi-Error-FreeQPSKQuaternary PSKRRandomized sequenceRFRadio FrequencyRSReed-SolomonSMATVSatellite Master Antenna TeleVisionTBDTo Be DefinedTDMTime Division MultiplexTVTeleVisionTWTATravelling Wave Tube Amplifier4Transmission system4.1System definitionThe System is defined as the functional block of equipment performing the adaptation of the baseband TV signals from theoutput of the MPEG-2 transport multiplexer, to the MVDS channel characteristics.The following processes shall be applied to the data stream (see figure 1):-transport multiplex adaptation and randomization for energy dispersal;-outer coding (i.e. Reed-Solomon);-convolutional interleaving;-inner coding (i.e. punctured convolutional code);-baseband shaping for modulation;-modulation.The System functional description is given in annex B.MVDS services at millimetric frequency bands are particularly affected by power limitations, therefore ruggedness againstnoise and interference shall be the main design objective, rather than spectrum efficiency.To achieve a very high power efficiency without excessively penalizing the spectrum efficiency, the System shall use QPSKmodulation and the concatenation of convolutional and RS codes.The convolutional code is able to be configured flexibly, allowing the optimization of the system performance for a givenMVDS transmitter bandwidth (see annex C).The System is suitable for single carrier per MVDS transmitter Time Division Multiplex (TDM) type applications.The System can also be used for multi-carrier Frequency Division Multiplex (FDM) type applications.SIST EN 300 748 V1.1.2:2003



EN 300 748 V1.1.2 (1997-08)8to the RFMVDSChannelQPSKmodulatorMVDS channel adapterService componentsMPEG - 2Source coding and multiplexingServicesVideo coderAudio coderData coder12nMUXadaptation&energydispersalOutercoderConv.inter-leaverInnercoderBasebandshapingRS (204, 188)ConvolutionalcodeProgrammeMUXTransportMUXFigure 1: Functional block diagram of the SystemThe System is directly compatible with MPEG-2 coded TV signals. The modem transmission frame is synchronous withthe MPEG-2 multiplex transport packets.If the received signal is above C/N and C/I threshold, the Forward Error Correction (FEC) technique adopted in theSystem is designed to provide a Quasi Error Free (QEF) quality target. The QEF means less than one uncorrectederror-event per transmission hour, corresponding to Bit Error Ratio (BER) = 10-10 to 10-11 at the input of the MPEG-2demultiplexer.4.2Adaptation to MVDS transmitter characteristicsMVDS transmitters of digital multi-programme TV services will use channels within band plans set according to individualcountries' planning and regulatory criteria and are required to provide compatibility with existing digital cable and satelliteservices. The MVDS transmitter performance specification and, in particular, its operating bandwidth will determine thedata rates available to the service.The symbol rate shall be matched to given MVDS transmitter characteristics. Examples based on computer simulations fora hypothetical MVDS chain, not including interference effects, are given in annex C.4.3InterfacingThe System, as defined in the present document, shall be delimited by the following interfaces given in table 1:Table 1: System interfacesLocationInterfaceInterface typeConnectionTransmit stationInputMPEG-2transport multiplexfrom MPEG-2multiplexerOutput70/140 MHz IFto RF devicesReceive installationOutputMPEG-2transport multiplexto MPEG-2demultiplexerInputTBDfrom RF devices(indoor unit)SIST EN 300 748 V1.1.2:2003



EN 300 748 V1.1.2 (1997-08)94.4Channel coding4.4.1Transport multiplex adaptation and randomization for energydispersalThe System input stream shall be organized in fixed length packets (see figure 3), following the MPEG-2 transportmultiplexer. The total packet length of the MPEG-2 transport Multiplex (MUX) packet is 188 bytes.This includes 1 sync-word byte (i.e. 47HEX). The processing order at the transmitting side shall always start from theMSB (i.e. "0") of the sync word-byte (i.e. 01000111).In order to comply with ITU Radio Regulations and to ensure adequate binary transitions, the data of the input MPEG-2multiplex shall be randomized in acco
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