SIST EN 301 701 V1.1.1:2003

• Abstract:

  Microwave specification based on DVB-T support - DVB project

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.160.25 - Television receivers
• ICS: 33.170 - Television and radio broadcasting
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 301 701 V1.1.1 (2000-08) - Digital Video Broadcasting (DVB); OFDM modulation for microwave digital terrestrial television

SIST EN 301 701 V1.1.1:2003 is the Slovenian adoption of ETSI EN 301 701 V1.1.1, published by SIST. It specifies an OFDM-based microwave digital terrestrial television transport system for DVB use. The standard is meant for broadcasters, manufacturers and network designers who need to carry DVB-T signals over a microwave layer and then recover them for normal UHF/VHF reception.

What does SIST EN 301 701 V1.1.1:2003 specify?

SIST EN 301 701 V1.1.1:2003 specifies an optional downlink or broadcast transmission system for digital microwave TV and data broadcasting using OFDM modulation. It keeps the DVB-T framing, channel coding and modulation approach, and adds the detail needed for multi-programme microwave services.

The standard is organized into:

• Clause 1: Scope
• Clause 2: References
• Clause 3: Symbols and abbreviations
• Clause 4: Terrestrial Baseline and Microwave Transport systems
• Clause 5: Informative Annex, with phase noise and frequency stability guidance
• Bibliography and history

In practice, the standard tells you how to adapt a terrestrial DVB-T signal for microwave transport, how to move it between bands, and what performance points matter when OFDM is used at microwave frequencies.

What are the key requirements of SIST EN 301 701 V1.1.1:2003?

Terrestrial Baseline System

SIST EN 301 701 V1.1.1:2003 defines the Terrestrial Baseline System as the equipment chain that adapts MPEG-2 transport stream signals to the UHF/VHF channel environment. Clause 4.1 lists the processing steps: transport multiplex adaptation and randomization, outer coding, outer interleaving, inner coding, inner interleaving, mapping and modulation, and OFDM transmission.

For users, this matters because the microwave system is not a separate coding scheme - it keeps the DVB-T signal structure. That makes planning, encoding and receiver compatibility much simpler for broadcasters and equipment integrators.

Microwave Transport System and frequency translation

Clause 4.2 says the Microwave DVB-T Transport System uses the same modulation characteristics as the Terrestrial Baseline System, but frequency translates the signal into a microwave transport layer. The signal can then be frequency translated back into VHF/UHF so that Terrestrial Baseline DVB-T demodulators and decoders can work with it.

Clause 4.3 allows channels or blocks of channels to be upconverted to frequencies within the microwave transport layer and later downconverted to an appropriate UHF/VHF channel. The standard recommends keeping the same channel spacing as in EN 300 744 and avoiding frequency inversion.

For readers, this means the microwave link can act as a transport path without changing the DVB-T signal format more than necessary.

Modulation parameters and spectrum

Clause 4.4 states that all coderates, modes and modulation rates specified in EN 300 744 are valid for microwave distribution. Clause 4.5 says that where the microwave band has a similar spectrum occupancy environment, the spectrum masks in EN 300 744 apply.

In practice, this lets system designers reuse DVB-T settings and apply the same spectral control rules they already use for terrestrial broadcasting.

Informative guidance on microwave impairments

Clause 5 gives informative guidance on phase noise and frequency stability. It explains that OFDM at microwave frequencies is more sensitive to phase noise and frequency drift than at UHF or VHF, so oscillator quality and receiver tolerance must be considered carefully.

For engineering work, this means the transmitter, converters and receivers must be checked as a chain. A design that works at lower frequencies may need tighter oscillator control, pilot recovery or receiver compensation at microwave frequencies.

What terms does SIST EN 301 701 V1.1.1:2003 define?

• DVB - Digital Video Broadcasting, the broadcast family that this standard belongs to.
• DVB-T - DVB-Terrestrial, the terrestrial digital television system used as the baseline.
• OFDM - Orthogonal Frequency Division Multiplexing, the modulation method used for transmission.
• MPEG - Moving Picture Experts Group, the source of the coded TV signal formats referenced by the standard.
• AFC - Automatic Frequency Control, a receiver function that helps correct frequency drift.
• SFN - Single Frequency Network, a network type named in the abbreviations list.
• UHF/VHF - Ultra-High Frequency / Very-High Frequency, the terrestrial bands used for baseline reception.

Who uses SIST EN 301 701 V1.1.1:2003?

SIST EN 301 701 V1.1.1:2003 is used by broadcasters, transmission engineers, receiver and converter manufacturers, and system integrators. It is relevant when planning microwave links for digital television or data broadcasting, especially where DVB-T signals must be transported, translated between bands, and then received with standard DVB-T equipment.

Which standards are used with SIST EN 301 701 V1.1.1:2003?

• EN 300 744 - provides the DVB-T framing structure, channel coding and modulation that this standard builds on.
• ISO/IEC 13818-1 - provides the MPEG-2 systems layer used for the transport stream.
• ISO/IEC 13818-2 - provides the video coding part of MPEG-2.
• ISO/IEC 13818-3 - provides the audio coding part of MPEG-2.
• EN 300 748 - is cited as an existing microwave transmission standard for MVDS at 10 GHz and above.
• EN 300 749 - is cited as an existing microwave transmission standard for MMDS below 10 GHz.

What does the SIST EN 301 701 V1.1.1:2003 document contain?

SIST EN 301 701 V1.1.1:2003 contains two functional block diagrams showing the baseline system and the microwave transport path. It also includes an example of frequency translation between UHF and microwave for an off-air fed system.

The standard includes a theoretical DVB OFDM spectrum illustration and notes on spectrum masks. Those items support filter design and spectral planning.

Its informative annex material discusses phase noise and frequency stability at microwave frequencies, which helps in oscillator selection, converter design and receiver planning.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalna videoradiodifuzija (DVB) – Modulacija OFDM za mikrovalovno digitalno prizemno televizijoDigital Video Broadcasting (DVB); OFDM modulation for microwave digital terrestrial television33.170Televizijska in radijska difuzijaTelevision and radio broadcasting33.160.25Televizijski sprejemnikiTelevision receiversICS:Ta slovenski standard je istoveten z:EN 301 701 Version 1.1.1SIST EN 301 701 V1.1.1:2003en01-december-2003SIST EN 301 701 V1.1.1:2003SLOVENSKI
STANDARD
ETSIEN301701V1.1.1(2000-08)EuropeanStandard(Telecommunicationsseries)DigitalVideoBroadcasting(DVB);OFDMmodulationformicrowavedigitalterrestrialtelevisionEBUUEREuropeanBroadcastingUnionUnionEuropéennedeRadio-TélévisionSIST EN 301 701 V1.1.1:2003

ETSIETSIEN301701V1.1.1(2000-08)2ReferenceDEN/JTC-DVB-95KeywordsDVB,digital,video,broadcasting,MPEG,TV,audio,dataETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.©EuropeanBroadcastingUnion2000.Allrightsreserved.SIST EN 301 701 V1.1.1:2003

ETSIETSIEN301701V1.1.1(2000-08)3ContentsIntellectualPropertyRights.4Foreword.41Scope.62References.63Symbolsandabbreviations.73.1Symbols.73.2Abbreviations.74TerrestrialBaseline&MicrowaveTransportsystems.74.1TerrestrialBaselineSystem.74.2MicrowaveTransportSystem.84.3Frequencytranslation.84.4Modulationparameters.94.5Spectrumcharacteristicsandspectrummask.105InformativeAnnex.105.1PhaseNoiseRequirements.105.2Frequencystabilityrequirements.11Bibliography.12History.13SIST EN 301 701 V1.1.1:2003

ETSIETSIEN301701V1.1.1(2000-08)4IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbytheJointTechnicalCommittee(JTC)BroadcastoftheEuropeanBroadcastingUnion(EBU),ComitéEuropéendeNormalisationElectrotechnique(CENELEC)andtheEuropeanTelecommunicationsStandardsInstitute(ETSI).NOTE:TheEBU/ETSIJTCBroadcastwasestablishedin1990toco-ordinatethedraftingofstandardsinthespecificfieldofbroadcastingandrelatedfields.Since1995theJTCBroadcastbecameatripartitebodybyincludingintheMemorandumofUnderstandingalsoCENELEC,whichisresponsibleforthestandardizationofradioandtelevisionreceivers.TheEBUisaprofessionalassociationofbroadcastingorganizationswhoseworkincludestheco-ordinationofitsmembers'activitiesinthetechnical,legal,programme-makingandprogramme-exchangedomains.TheEBUhasactivemembersinabout60countriesintheEuropeanbroadcastingarea;itsheadquartersisinGeneva.EuropeanBroadcastingUnionCH-1218GRANDSACONNEX(Geneva)SwitzerlandTel:[phone]Fax:[phone]DigitalVideoBroadcasting(DVB)ProjectFoundedinSeptember1993,theDVBProjectisamarket-ledconsortiumofpublicandprivatesectororganizationsinthetelevisionindustry.ItsaimistoestablishtheframeworkfortheintroductionofMPEG-2baseddigitaltelevisionservices.Nowcomprisingover200organizationsfrommorethan25countriesaroundtheworld,DVBfostersmarket-ledsystems,whichmeettherealneeds,andeconomiccircumstances,oftheconsumerelectronicsandthebroadcastindustry.ThepresentdocumentpresentsmanufacturersandbroadcasterstheopportunitytoapplyDVB-TstandardstomicrowavetransmissionaswellasterrestrialtransmissionatUHF/VHF.ConsequentlythisstandardreferstotheDVB-TdocumentEN300744[1],fortheframingstructure,channelcodingandmodulation.OnlyissuesthatapplytotheuseofthemicrowavetransportlayerwhicharenotcoveredbyEN300744[1]aredetailedwithinthisspecification.ThepresentdocumentisnotintendedtoreplacetheexistingmicrowavetransmissionstandardsEN300748[5]andEN300749[6],whichuseQPSKandQAMmodulationforfrequenciesgreaterandlessthan10GHzrespectively.ThesestandardsremainvalidbutthereisnowtheoptionofadoptingthebenefitsofOFDMmodulationformicrowavetransmissioninanyfrequencyband.SIST EN 301 701 V1.1.1:2003

ETSIETSIEN301701V1.1.1(2000-08)5NationaltranspositiondatesDateofadoptionofthisEN:26May2000DateoflatestannouncementofthisEN(doa):31August2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):28February2001DateofwithdrawalofanyconflictingNationalStandard(dow):28February2001SIST EN 301 701 V1.1.1:2003

ETSIETSIEN301701V1.1.1(2000-08)61ScopeThepresentdocumentdescribesanoptionaldownlinkorbroadcasttransmissionsystemfordigitalmicrowaveTelevision(TV)anddatabroadcastingusingOFDMmodulation.Itreferstotheframingstructure,channelcodingandmodulationsystemintendedfordigitalterrestrialtelevision(EN300744[1])withadditionaldetailsthatapplytomulti-programmemicrowaveservices.Thescopeisasfollows:-itgivesageneraldescriptionofhowadigitalterrestrialbasedtransmissionschememaybeappliedtoadigitalmicrowavetransportlayer;-itidentifiesthedifferencesinperformancerequirementsandfeaturesofthesystem,comparedtoUHF/VHFbroadcas
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