SIST EN 300 749 V1.1.2:2003
(Main)Digital Video Broadcasting (DVB); Microwave Multipoint Distribution Systems (MMDS) below 10 GHz
- Abstract
This version 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.
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
- Mandate
- T-304
SIST EN 300 749 V1.1.2:2003 is the Slovenian adoption of the ETSI standard for Digital Video Broadcasting (DVB) Microwave Multipoint Distribution Systems (MMDS) below 10 GHz. It specifies the framing structure, channel coding and modulation for digital multi-program television distribution over MMDS links, so engineers and buyers can check how DVB signals are carried in this transmission system.
What does SIST EN 300 749 V1.1.2:2003 specify?
SIST EN 300 749 V1.1.2:2003 specifies the DVB transmission System for MMDS operating below 10 GHz. The document covers how MPEG-2 transport packets are randomized, protected against errors, interleaved and modulated for RF transmission.
The scope also states that the System is harmonized with cable and satellite transmission practice, while using QAM and Forward Error Correction (FEC) adapted to MMDS. In practice, this tells a network designer what processing chain the transmitter and receiver must follow to interoperate with DVB MMDS equipment.
| Annex | What it covers |
|---|---|
| Annex A | Baseband filter characteristics for hardware implementation |
| Annex B | Transparency of MMDS networks, with examples of useful bit rates and bandwidth use |
| Annex C | Bibliography |
What are the key requirements of SIST EN 300 749 V1.1.2:2003?
SIST EN 300 749 V1.1.2:2003 defines a complete transmit and receive chain in Clauses 4 to 9. The main practical point is that every stage, from packet handling to RF modulation, is tied to a specific MPEG-2 based structure.
MPEG-2 packet handling and framing
Clause 5 states that the transport layer uses 188-byte MPEG-2 packets with one sync byte, three header bytes and 184 bytes of payload. Clause 6 bases the framing structure on these packets. For implementers, this means the system is built around the standard MPEG-2 transport format rather than a proprietary frame.
Randomization and sync processing
Clause 7.1 requires PRBS-based randomization with the polynomial 1 + X14 + X15, started every eight transport packets, and inversion of the first sync byte in each group. In practice, this improves spectrum shaping and provides regular timing markers for receiver synchronization.
Reed-Solomon protection
Clause 7.2 requires shortened Reed-Solomon (RS) encoding with T = 8, adding parity to form an RS(204,188) codeword. For users of the standard, this is the main outer error-correction stage and is what gives protection against byte errors on the MMDS channel.
Interleaving against burst errors
Clause 7.3 applies convolutional interleaving with depth I = 12. The standard says this helps against burst errors by spreading adjacent bytes across time, which matters when the radio channel causes short fading or interference bursts.
Byte-to-symbol mapping and differential encoding
Clause 8 maps bytes into m-tuples for 16-QAM, 32-QAM or 64-QAM, and differentially encodes the two most significant bits of each symbol. This reduces sensitivity to constellation rotation, which helps in real radio links where phase reference can drift.
Modulation and receiver support
Clause 9 uses Quadrature Amplitude Modulation (QAM) with 16, 32 or 64 points, and requires receivers to support at least 64-QAM. In practice, this gives implementers a common modulation family while allowing the link to be dimensioned for different capacity and robustness targets.
Baseband filtering and filter limits
Annex A gives the baseband filter template and limits for in-band ripple, out-of-band rejection and group delay ripple, with a roll-off factor of 0,15 in the main text. This matters because transmitter filtering affects occupied bandwidth and signal quality.
What terms does SIST EN 300 749 V1.1.2:2003 define?
- MMDS - Microwave Multipoint Distribution Systems, the radio distribution environment covered by the standard.
- MPEG-2 - the transport layer format used for the input packets.
- FEC - Forward Error Correction, the error-control method used in the channel coding chain.
- RS - Reed-Solomon, the outer error-correcting code used on each packet.
- QAM - Quadrature Amplitude Modulation, the modulation family used for transmission.
- QEF - Quasi Error Free, the target operating condition mentioned in the scope.
- BER - Bit Error Ratio, the error metric improved by the coding chain.
Who uses SIST EN 300 749 V1.1.2:2003?
SIST EN 300 749 V1.1.2:2003 is used by DVB transmission engineers, MMDS system designers, equipment manufacturers, network operators and integration teams. They use it to design transmitters and receivers, check framing and coding compatibility, and assess whether an MMDS network can carry DVB television services in a standard way.
It is also relevant to quality and procurement teams that need to specify the transmission interface for MMDS-based distribution systems.
What changed in SIST EN 300 749 V1.1.2:2003 from the previous edition?
SIST EN 300 749 V1.1.2:2003 is described as the second edition, previously an ETS and now an EN. The changes listed are editorial only: the DVB logo was added to the front page, the title was changed to the DVB form, and the foreword gained the DVB acknowledgement.
Which standards are used with SIST EN 300 749 V1.1.2:2003?
SIST EN 300 749 V1.1.2:2003 names ISO/IEC 13818-1 for the MPEG-2 transport layer. It also refers to EN 300 421 and EN 300 429 as related DVB framing, channel coding and modulation standards for satellite and cable, which help place this MMDS System in the wider DVB family.
What does the SIST EN 300 749 V1.1.2:2003 document contain?
SIST EN 300 749 V1.1.2:2003 contains the system concept, MPEG-2 transport layer description, framing structure, randomization, RS encoding, convolutional interleaving, byte-to-symbol mapping and modulation rules. It also includes a conceptual block diagram of transmitter and receiver processing, a scrambler/descrambler schematic, an interleaver diagram, and constellation diagrams for 16-QAM, 32-QAM and 64-QAM.
Annex A provides the filter characteristic template used for hardware implementation. Annex B gives example bit rates and occupied bandwidths to illustrate transparent retransmission over MMDS networks.
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Frequently Asked Questions
SIST EN 300 749 V1.1.2:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital Video Broadcasting (DVB); Microwave Multipoint Distribution Systems (MMDS) below 10 GHz". This standard covers: This version 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 version 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.
SIST EN 300 749 V1.1.2:2003 is classified under the following ICS (International Classification for Standards) categories: 33.170 - Television and radio broadcasting. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 749 V1.1.2:2003 is associated with the following European legislation: Standardization Mandates: T-304. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 300 749 V1.1.2:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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
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
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