ETSI TS 101 851-3-2-2008 Satellite Earth Stations and Systems (SES) Satellite Component of UMTS IMT-2000 Part 3 Spreading and modulation Sub-part 2 A-family (S-UMTS-A 25 213)《卫星地面站_1.pdf

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1、 ETSI TS 101 851-3-2 V2.1.1 (2008-01)Technical Specification Satellite Earth Stations and Systems (SES);Satellite Component of UMTS/IMT-2000;Part 3: Spreading and modulation;Sub-part 2: A-family (S-UMTS-A 25.213)ETSI ETSI TS 101 851-3-2 V2.1.1 (2008-01) 2 Reference RTS/SES-00298-3-2 Keywords MES, MS

2、S, satellite, UMTS 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 7803/88 Important notice Individual copies of the pre

3、sent 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 version is the Portable Document Format (PDF). In case

4、 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 status. Information on the current status of this and

5、 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 Notification No part may be reproduced except as authorize

6、d by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2008. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the ben

7、efit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 101 851-3-2 V2.1.1 (2008-01) 3 Contents Intellectual Property Rights5 Foreword.5 Introduction 5 1 Scope 7 2 References 7 2.1 Normative references .7 2.2

8、 Informative references8 3 Symbols and abbreviations.8 3.1 Symbols8 3.2 Abbreviations .8 4 Uplink spreading and modulation 9 4.1 Overview 9 4.2 Spreading9 4.2.1 Uplink Dedicated Physical Channels (uplink DPDCH/DPCCH) .9 4.2.2 PRACH.10 4.2.2.1 PRACH preamble part 10 4.2.2.2 PRACH message part10 4.2.3

9、 PCPCH11 4.3 Code generation and allocation 11 4.3.1 Channelisation codes 11 4.3.1.1 Code definition11 4.3.1.2 Code allocation for DPCCH/DPDCH .12 4.3.1.3 Code allocation for PRACH message part 12 4.3.1.4 Code allocation for PCPCH message part.12 4.3.1.5 Channelisation code for PCPCH power control p

10、reamble 12 4.3.2 Scrambling codes13 4.3.2.1 General13 4.3.2.2 Long scrambling sequence13 4.3.2.3 Short scrambling sequence14 4.3.2.4 DPCCH/DPDCH scrambling code15 4.3.2.5 PRACH message part scrambling code.16 4.3.2.6 PCPCH message part scrambling code .16 4.3.2.7 PCPCH power control preamble scrambl

11、ing code16 4.3.3 PRACH preamble codes .16 4.3.3.1 Preamble code construction 16 4.3.3.2 Preamble scrambling code 16 4.3.3.3 Preamble signature17 4.4 Modulation .17 4.4.1 Modulating chip rate.17 4.4.2 Modulation17 5 Downlink spreading and modulation .18 5.1 Spreading18 5.2 Code generation and allocat

12、ion 19 5.2.1 Channelisation codes 19 5.2.2 Scrambling code .20 5.2.2.1 Long scrambling code.20 5.2.2.2 Short scrambling code.21 5.2.3 Synchronization codes 23 5.2.3.1 Code Generation .23 5.3 Modulation .23 5.3.1 Modulating rate.23 5.3.2 Modulation23 ETSI ETSI TS 101 851-3-2 V2.1.1 (2008-01) 4 Annex

13、A (informative): Generalized Hierarchical Golay Sequences.24 A.1 Alternative generation 24 Annex B (informative): Bibliography.25 History 26 ETSI ETSI TS 101 851-3-2 V2.1.1 (2008-01) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared

14、 to ETSI. The information 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

15、available from the 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 refe

16、renced in ETSI SR 000 314 (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 ETSI Technical Committee Satellite Earth Stations and Systems (SES). The present document is speci

17、fying the Satellite Radio Interface referenced as SRI Family A at ITU-R, in the frame of ITU-R Recommendation M.1457 8. The present document is part 3, sub-part 2 of a multi-part deliverable covering Satellite Earth Stations and Systems (SES); Satellite Component of UMTS/IMT-2000; A-family, as ident

18、ified below: Part 1: “Physical channels and mapping of transport channels into physical channels“; Part 2: “Multiplexing and channel coding“; Part 3: “Spreading and modulation“; Sub-part 1: “G-family (S-UMTS-G 25.213)“; Sub-part 2: “A-family (S-UMTS-A 25.213)“; Part 4: “Physical layer procedures“; P

19、art 5: “UE Radio Transmission and Reception“; Part 6: “Ground stations and space segment radio transmission and reception“. Introduction S-UMTS stands for the Satellite component of the Universal Mobile Telecommunication System. S-UMTS systems will complement the terrestrial UMTS (T-UMTS) and inter-

20、work with other IMT-2000 family members through the UMTS core network. S-UMTS will be used to deliver 3rdgeneration mobile satellite services (MSS) utilizing either low (LEO) or medium (MEO) earth orbiting, or geostationary (GEO) satellite(s). S-UMTS systems are based on terrestrial 3GPP specificati

21、ons and will support access to GSM/UMTS core networks. NOTE 1: The term T-UMTS will be used in the present document to further differentiate the Terrestrial UMTS component. Due to the differences between terrestrial and satellite channel characteristics, some modifications to the terrestrial UMTS (T

22、-UMTS) standards are necessary. Some specifications are directly applicable, whereas others are applicable with modifications. Similarly, some T-UMTS specifications do not apply, whilst some S-UMTS specifications have no corresponding T-UMTS specification. ETSI ETSI TS 101 851-3-2 V2.1.1 (2008-01) 6

23、 Since S-UMTS is derived from T-UMTS, the organization of the S-UMTS specifications closely follows the original 3rdGeneration Partnership Project (3GPP) structure. The S-UMTS numbers have been designed to correspond to the 3GPP terrestrial UMTS numbering system. All S-UMTS specifications are alloca

24、ted a unique S-UMTS number as follows: S-UMTS-n xx.yyy Where : The numbers xx and yyy correspond to the 3GPP numbering scheme. n (n = A, B, C, ) denotes the family of S-UMTS specifications. An S-UMTS system is defined by the combination of a family of S-UMTS specifications and 3GPP specifications, a

25、s follows: If an S-UMTS specification exists it takes precedence over the corresponding 3GPP specification (if any). This precedence rule applies to any references in the corresponding 3GPP specifications. NOTE 2: Any references to 3GPP specifications within the S-UMTS specifications are not subject

26、 to this precedence rule. For example, an S-UMTS specification may contain specific references to the corresponding 3GPP specification. If an S-UMTS specification does not exist, the corresponding 3GPP specification may or may not apply. The exact applicability of the complete list of 3GPP specifica

27、tions shall be defined at a later stage. ETSI ETSI TS 101 851-3-2 V2.1.1 (2008-01) 7 1 Scope The present document defines the Layer 1 transport channels and physical channels used for family A of the satellite component of UMTS (S-UMTS-A). It is based on the FDD mode of UTRA defined by TS 125 211 2,

28、 TS 125 212 3, TS 125 213 4, TS 125 214 5 and adapted for operation over satellite transponders. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. Non-s

29、pecific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that it will be possible to use all future changes of the referenced document for the purposes of the referring document; - for informative references. Referenced document

30、s which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably, the primary source of the referenced document should be

31、cited, in order to ensure traceability. Furthermore, the reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the method of access to the referenced document and the full network address, with the same punctuation and use of upper case

32、 and lower case letters. 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 indispensable for the application of the present document. For dated refer

33、ences, only the edition cited applies. For non-specific references, the latest edition of the referenced document (including any amendments) applies. 1 ETSI TS 101 851-1-2: “Satellite Earth Stations and Systems (SES); Satellite Component of UMTS/IMT-2000; Part 1: Physical channels and mapping of tra

34、nsport channels into physical channels; Sub-part 2: A-family (S-UMTS-A 25.211)“. 2 ETSI TS 125 211: “Universal Mobile Telecommunications System (UMTS); Physical channels and mapping of transport channels onto physical channels (FDD) (3G TS 25.211 version 3.3.0 Release 1999)“. 3 ETSI TS 125 212: “Uni

35、versal Mobile Telecommunications System (UMTS); Multiplexing and channel coding (FDD) (3G TS 25.212 version 3.3.0 Release 1999)“. 4 ETSI TS 125 213: “Universal Mobile Telecommunications System (UMTS); Spreading and modulation (FDD) (3G TS 25.213 version 3.3.0 Release 1999)“. 5 ETSI TS 125 214: “Univ

36、ersal Mobile Telecommunications System (UMTS); Physical layer procedures (FDD) (3G TS 25.214 version 3.3.0 Release 1999)“. 6 ETSI TS 125 101: “Universal Mobile Telecommunications System (UMTS); UE Radio transmission and Reception (FDD) (3G TS 25.101 version 3.3.0 Release 1999)“. ETSI ETSI TS 101 851

37、-3-2 V2.1.1 (2008-01) 8 7 ETSI TS 125 104: “Universal Mobile Telecommunications System (UMTS); UTRA (BS) FDD; Radio transmission and Reception (3G TS 25.104 version 3.3.0 Release 1999)“. 2.2 Informative references 8 ITU-R Recommendation M.1457 (2006): “Detailed specifications of the radio interfaces

38、 of International Mobile Telecommunications-2000 (IMT-2000)“. 3 Symbols and abbreviations 3.1 Symbols For the purposes of the present document, the following symbols apply: Cch,SF,nn:th channelisation code with spreading factor SF Cpre,n,sPRACH preamble code for n:th preamble scrambling code and sig

39、nature s Csig,sPRACH signature code for signature s Sdpch,nn:th DPCCH/DPDCH uplink scrambling code Sr-pre,nn:th PRACH preamble scrambling code Sr-msg,nn:th PRACH message scrambling code Sdl,nDL scrambling code CpscPSC code Cssc,nn:th SSC code UW Unique Word 3.2 Abbreviations For the purposes of the

40、present document, the following abbreviations apply: AICH Acquisition Indicator Channel CCPCH Common Control Physical Channel CPICH Common Pilot Channel DCH Dedicated Channel DPCH Dedicated Physical Channel DPCCH Dedicated Physical Control Channel DPDCH Dedicated Physical Data Channel FDD Frequency

41、Division Duplex Mcps Mega Chip Per Second OVSF Orthogonal Variable Spreading Factor (codes) PDSCH Physical Dedicated Shared Channel PICH Page Indication Channel PRACH Physical Random Access Channel PSC Primary Synchronization Code QPSK Quadrature Phase Shift Keying SCH Synchronization Channel SF Spr

42、eading Factor SSC Secondary Synchronization Code UE User Equipment ETSI ETSI TS 101 851-3-2 V2.1.1 (2008-01) 9 4 Uplink spreading and modulation 4.1 Overview Spreading is applied to the physical channels. It consists of two operations. The first is the channelisation operation, which transforms ever

43、y data symbol into a number of chips, thus increasing the bandwidth of the signal. The number of chips per data symbol is called the Spreading Factor (SF). The second operation is the scrambling operation, where a scrambling code is applied to the spread signal. With the channelisation, data symbol

44、on so-called I- and Q-branches are independently multiplied with an OVSF code. With the scrambling operation, the resultant signals on the I and Q-branches are further multiplied by complex-valued scrambling code, where I and Q denote real and imaginary parts, respectively. 4.2 Spreading 4.2.1 Uplin

45、k Dedicated Physical Channels (uplink DPDCH/DPCCH) Figure 1 illustrates the principle of the uplink spreading of DPCCH and DPDCHs. The binary DPCCH and DPDCHs to be spread are represented by real-valued sequences, i.e. the binary value “0“ is mapped to the real value +1, while the binary value “1“ i

46、s mapped to the real value -1. The DPCCH is spread to the chip rate by the channelisation code Cch,0, while the n:th DPDCH called DPDCHnis spread to the chip rate by the channelisation code Cch,n. One DPCCH and up to six parallel DPDCHs can be transmitted simultaneously, i.e. 0 n 6. Ijcd,1 dSdpch,nI

47、+jQDPDCH1Qcd,3 dDPDCH3cd,5 dDPDCH5cd,2 dDPDCH2cd,4 dDPDCH4cd,6 dDPDCH6cc cDPCCHSFigure 1: Spreading/modulation for uplink DPCCH and DPDCHs ETSI ETSI TS 101 851-3-2 V2.1.1 (2008-01) 10After channelisation, the real-valued spread signals are weighted by gain factors, cfor DPCCH and dfor all DPDCHs. At

48、 every instant in time, at least one of the values cand dhas the amplitude 1,0. The -values are quantized into 4 bit words. The quantization steps are given in table 1. Table 1: The quantization of the gain parameters Signalling values for cand dQuantized amplitude ratios cand d15 1,0 14 14/15 13 13

49、/15 12 12/15 11 11/15 10 10/15 9 9/15 8 8/15 7 7/15 6 6/15 5 5/15 4 4/15 3 3/15 2 2/15 1 1/15 0 Switch off After the weighting, the stream of real-valued chips on the I and Q-branches are then summed and treated as a complex-valued stream of chips. This complex-valued signal is then scrambled by the complex-valued scrambling codeSdpch,n. The scrambling code is applied aligned with the radio frames, i.e. the first scrambling chip corresponds to the beginning of a radio frame. 4.2.2 PRACH 4.2.2.1 PRACH preamble part The