ETSI EN 300 749 V1.1.2 (1997-08)
Digital Video Broadcasting (DVB); Microwave Multipoint Distribution Systems (MMDS) below 10 GHz
Digital Video Broadcasting (DVB); Microwave Multipoint Distribution Systems (MMDS) below 10 GHz
REN/JTC-DVB-69
Digitalna videoradiodifuzija (DVB) – Mikrovalovni večtočkovni distribucijski sistemi (MMDS) pod 10 GHz
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.WULEXFLMVNLDigital Video Broadcasting (DVB); Microwave Multipoint Distribution Systems (MMDS) below 10 GHz33.170Televizijska in radijska difuzijaTelevision and radio broadcastingICS:Ta slovenski standard je istoveten z:EN 300 749 Version 1.1.2SIST EN 300 749 V1.1.2:2003en01-december-2003SIST EN 300 749 V1.1.2:2003SLOVENSKI
STANDARD
SIST EN 300 749 V1.1.2:2003
European Telecommunications Standards Institute EN 300 749 V1.1.2 (1997-08)European Standard (Telecommunications series)Digital Video Broadcasting (DVB);Microwave Multipoint Distribution Systems (MMDS)below 10 GHzEBUUEREuropean Broadcasting UnionUnion Européenne de Radio-TélévisionSIST EN 300 749 V1.1.2:2003
EN 300 749 V1.1.2 (1997-08)2ReferenceREN/JTC-00DVB-69 (6xo00idc.PDF)KeywordsDVB, digital, video, broadcasting, MPEG, TV,multipointETSI SecretariatPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16Siret 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=secretariatInternetsecretariat@etsi.frhttp://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 300 749 V1.1.2:2003
EN 300 749 V1.1.2 (1997-08)3ContentsIntellectual Property Rights.4Foreword.41Scope.52Normative references.53Symbols and abbreviations.53.1Symbols.53.2Abbreviations.64MMDS System concept.64.1Baseband interfacing and sync.84.2Sync 1 inversion and randomization.84.3Reed-Solomon (RS) encoder.84.4Convolutional interleaver.84.5Byte to m-tuple conversion.84.6Differential encoding.84.7Baseband shaping.84.8QAM modulation and physical interface.84.9MMDS receiver.85MPEG-2 transport layer.86Framing structure.97Channel coding.97.1Randomization for spectrum shaping.107.2Reed-Solomon (RS) encoding.117.3Convolutional interleaving.118Byte-to-symbol mapping.129Modulation.13Annex A (normative):Baseband filter characteristics.16Annex B (informative):Transparency of MMDS networks.17Annex C (informative):Bibliography.18History.19SIST EN 300 749 V1.1.2:2003
EN 300 749 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:+41 22 717 21 11Fax:+41 22 717 24 81Digital 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:4 April 1997Date of latest announcement of this EN (doa):31 July 1997Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 January 1998Date of withdrawal of any conflicting National Standard (dow):31 January 1998SIST EN 300 749 V1.1.2:2003
EN 300 749 V1.1.2 (1997-08)51ScopeThe present document describes the framing structure, channel coding and modulation (denoted "the System" for thepurposes of the present document) for a digital multi-program television distribution by Microwave MultipointDistribution Systems (MMDS) operating below 10 GHz.The aim of the present document is to present a harmonized transmission standard for cable, satellite and MMDS, basedon the MPEG-2 System Layer ISO/IEC 13818-1 [1], with the addition of appropriate Forward Error Correction (FEC)technique.This System follows the modulation/channel coding system for digital multi-program television by cable EN 300 429(see annex C, bibliography) and is based on Quadrature Amplitude Modulation (QAM) with 16, 32, and 64 constellationpoints.The System FEC is designed to improve Bit Error Ratio (BER) from 10-4 to a range, 10-10 to 10-11, ensuring"Quasi Error Free" (QEF) operation with approximately one uncorrected error event per transmission hour.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: "Coding of moving pictures and associated audio".[2]IEEE Trans. Comm. Tech., COM-19, pp. 772-781, (October 1971) Forney, G.D.:"Burst-correcting codes for the classic bursty channel".3Symbols and abbreviations3.1SymbolsFor the purposes of the present document, the following symbols apply:aroll-off factorAk, BkMost Significant Bits (MSB) at the output of the byte to m-tuple converterf0channel centre frequencyfNNyquist frequencyg(x)Reed - Solomon (RS) code generator polynomialHEXHEXadecimalIInterleaving depth (bytes)I, QIn-phase, Quadrature phase components of the modulated signaljbranch indexknumber of bytes mapped into n symbolsmpower of 2m-level QAM: 4,5,6 for 16-QAM, 32-QAM, 64-QAM, respectivelySIST EN 300 749 V1.1.2:2003
EN 300 749 V1.1.2 (1997-08)6Mconvolutional interleaver branch depth for j = 1, M = N/Innumber of symbols mapped from k bytesNerror protected frame length (bytes)p(x)RS field generator polynomialrmin-band ripple (dB)RRandomized sequenceRssymbol Rate corresponding to the bilateral Nyquist bandwidth of the modulated signalRuuseful bit Rate after MPEG-2 transport multiplexerRu'bit Rate after RS outer encoderqnumber of differentially uncoded bits: 2,3,4 for 16-QAM, 32-QAM, 64-QAM, respectivelyTnumber of bytes which can be corrected in RS error protected packetTssymbol period3.2AbbreviationsFor the purposes of the present document, the following abbreviations apply:BBBaseBandBERBit Error RatioD/ADigital-to-Analogue conversionFECForward Error CorrectionFIFOFirst In First OutIFIntermediate FrequencyIRDIntegrated Receiver DecoderLSBLeast Significant BitMMDSMicrowave Multipoint Distribution SystemsMPEGMoving Pictures Experts GroupMSBMost Significant BitMUXMUltipleXPDHPlesiochronous Digital HierarchyPRBSPseudo-Random Binary SequenceQAMQuadrature Amplitude ModulationQEFQuasi Error FreeRFRadio FrequencyRSReed-SolomonSMATVSatellite Master Antenna TelevisionTDMTime Division MultiplexTVTeleVision4MMDS System conceptThe MMDS System shall be defined as the functional block of equipment performing the adaptation of the baseband TVsignals to the MMDS channel characteristics (see figure 1).At the transmitter site, the following TV baseband signal sources can be considered:-satellite signal(s);-cable signal(s);-contribution link(s);-local program source(s).The processes in the following subclauses shall be applied as shown in figure 1.SIST EN 300 749 V1.1.2:2003
EN 300 749 V1.1.2 (1997-08)7Figure 1: Conceptual block diagram of elements at the transmitting and receiving sites ofMMDS systems below 10 GHzSIST EN 300 749 V1.1.2:2003
EN 300 749 V1.1.2 (1997-08)84.1Baseband interfacing and syncThis unit shall adapt the data structure to the format of the signal source. The framing structure shall be in accordancewith MPEG-2 transport layer including sync bytes.NOTE:Interfaces are not part of the present document.4.2Sync 1 inversion and randomizationThis unit shall invert the Sync 1 byte according to the MPEG-2 framing structure, and randomizes the data stream forspectrum shaping purposes.4.3Reed-Solomon (RS) encoderThis unit shall apply a shortened RS code to each randomized transport packet to generate an error-protected packet.This code shall also be applied to the Sync byte itself.4.4Convolutional interleaverThis unit shall perform a depth I = 12 convolutional interleaving of the error-protected packets. The periodicity of thesync bytes shall remain unchanged.4.5Byte to m-tuple conversionThis unit shall perform a conversion of the bytes generated by the interleaver into QAM symbols.4.6Differential encodingIn order to get a rotationally-invariant constellation, this unit shall apply a differential encoding to the two MostSignificant Bits (MSBs) of eac
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.