1、 ETSI TS 101 851-3-1 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 1: G-family (S-UMTS-G 25.213)ETSI ETSI TS 101 851-3-1 V2.1.1 (2008-01) 2 Reference RTS/SES-00298-3-1 Keywords interfa
2、ce, MES, MSS, radio, 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
3、 copies of the present 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 For
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6、xcept as authorized 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 regi
7、stered for the benefit 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 101 851-3-1 V2.1.1 (2008-01) 3 Contents Intellectual Property Rights4 Foreword.4 Introduction 4 1 Scope 6 2 References 6 2.1 Normative
8、 references .6 3 Symbols and abbreviations.7 3.1 Symbols7 3.2 Abbreviations .7 4 Uplink spreading and modulation 7 4.1 Overview 7 4.2 Spreading8 4.2.1 DPCCH/DPDCH 8 4.2.2 PRACH.9 4.2.2.1 PRACH preamble part 9 4.2.2.2 PRACH message part9 4.3 Code generation and allocation 10 4.3.1 Channelization code
9、s 10 4.3.1.1 Code definition10 4.3.1.2 Code allocation for DPCCH/DPDCH .11 4.3.1.3 Code allocation for PRACH message part 11 4.3.2 Scrambling codes11 4.3.2.1 General11 4.3.2.2 Long scrambling sequence11 4.3.2.3 Short scrambling sequence13 4.3.2.4 DPCCH/DPDCH scrambling code14 4.3.2.5 PRACH message p
10、art scrambling code.14 4.3.3 PRACH preamble codes .15 4.3.3.1 Preamble code construction 15 4.3.3.2 Preamble scrambling code 15 4.3.3.3 Preamble signature15 4.4 Modulation .16 4.4.1 Modulating chip rate.16 4.4.2 Modulation16 5 Downlink spreading and modulation .17 5.1 Spreading17 5.2 Code generation
11、 and allocation 18 5.2.1 Channelization codes 18 5.2.2 Scrambling code .18 5.2.3 Synchronization codes 20 5.2.3.1 Code generation 20 5.2.3.2 Code allocation of SSC .21 5.3 Modulation .22 5.3.1 Modulating chip rate.22 5.3.2 Modulation22 Annex A (informative): Generalized Hierarchical Golay Sequences.
12、23 A.1 Alternative generation 23 History 24 ETSI ETSI TS 101 851-3-1 V2.1.1 (2008-01) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for E
13、TSI 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 available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/w
14、ebapp.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 referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may be
15、come, 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 specifying the Satellite Radio Interface referenced as SRI Family G at ITU-R, in the frame of the modi
16、fication of ITU-R Recommendation M.1457 4. This modification has been approved at SG8 meeting in November 2005. The present document is part 3, sub-part 1 of a multi-part deliverable covering Satellite Earth Stations and Systems (SES); Satellite Component of UMTS/IMT-2000; G-family, as identified be
17、low: 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“; Part 5: “
18、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-work wit
19、h 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 specifications and
20、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-UMTS) s
21、tandards 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 101 851-3-1 V2.1.1 (2008-01) 5 Since S
22、-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 allocated a un
23、ique 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, etc.) 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, as fol
24、lows: 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 to t
25、his precedence rule. 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 specifications sha
26、ll be defined at a later stage. ETSI ETSI TS 101 851-3-1 V2.1.1 (2008-01) 6 1 Scope The present document describes spreading and modulation for the Physical Layer for family G of the satellite component of UMTS (S-UMTS-G). It is based on the FDD mode of UTRA defined by TS 101 851-1-1 1, TS 101 851-2
27、-1 2, TS 101 851-4-1 3 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-specific reference m
28、ay 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 documents which are not fou
29、nd 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 cited, in order to
30、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 and lower case let
31、ters. 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 references, only the edi
32、tion cited applies. For non-specific references, the latest edition of the referenced document (including any amendments) applies. 1 ETSI TS 101 851-1-1: “Satellite Earth Stations and Systems (SES); Satellite Component of UMTS/IMT-2000; Part 1: Physical channels and mapping of transport channels int
33、o physical channels; Sub-part 1: G-family (S-UMTS-G 25.211)“. 2 ETSI TS 101 851-2-1: “Satellite Earth Stations and Systems (SES); Satellite Component of UMTS/IMT-2000; Part 2: Multiplexing and channel coding; Sub-part 1: G-family (S-UMTS-G 25.212)“. 3 ETSI TS 101 851-4-1: “Satellite Earth Stations a
34、nd Systems (SES); Satellite Component of UMTS/IMT-2000; Part 4: Physical layer procedures; Sub-part 1: G-family (S-UMTS-G 25.214)“. 4 ITU-R Recommendation M.1457 (2006): “Detailed specifications of the radio interfaces of International Mobile Telecommunications-2000 (IMT-2000)“. ETSI ETSI TS 101 851
35、-3-1 V2.1.1 (2008-01) 7 3 Symbols and abbreviations 3.1 Symbols For the purposes of the present document, the following symbols apply: Cch,SF,nn:th channelization code with spreading factor SF Cpre,n,sPRACH preamble code for n:th preamble scrambling code and signature s Csig,sPRACH/PCPCH signature c
36、ode 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 3.2 Abbreviations For the purposes of the present document, the following abbreviations a
37、pply: AICH Acquisition Indicator CHannel CCPCH Common Control Physical CHannel CPICH Common PIlot CHannel DCH Dedicated CHannel DPCCH Dedicated Physical Control CHannel DPCH Dedicated Physical CHannel DPDCH Dedicated Physical Data CHannel DTX Discontinuous Transmission FDD Frequency Division Duplex
38、GEO Geostationary Earth Orbit LEO Low Earth Orbit Mcps Mega chip per second MEO Medium Earth Orbit MICH MBMS Indication CHannel MSS Mobile Satellite Services OVSF Orthogonal Variable Spreading Factor (codes) PICH Page Indication CHannel PRACH Physical Random Access CHannel PSC Primary Synchronizatio
39、n Code QPSK Quaternary Phase Shift Keying SCH Synchronization CHannel SF Spreading Factor SSC Secondary Synchronization Code USRAN UMTS Satellite Radio Access Network UTRA UMTS Terrestrial Radio Access 4 Uplink spreading and modulation 4.1 Overview Spreading is applied to the physical channels. It c
40、onsists of two operations. The first is the channelization operation, which transforms every 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, whe
41、re a scrambling code is applied to the spread signal. ETSI ETSI TS 101 851-3-1 V2.1.1 (2008-01) 8 With the channelization, data symbols 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 fur
42、ther multiplied by complex-valued scrambling code, where I and Q denote real and imaginary parts, respectively. 4.2 Spreading 4.2.1 DPCCH/DPDCH 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 sequ
43、ences, i.e. the binary value “0“ is mapped to the real value +1, and the binary value “1“ is mapped to the real value -1. The DPCCH is spread to the chip rate by the channelization code cc. The n:th DPDCH called DPDCHnis spread to the chip rate by the channelization code cd,n. One DPCCH, up to six p
44、arallel DPDCHs, i.e. 1 n 6. Ijcd,1dSdpch,nI+jQDPDCH1Qcd,3dDPDCH3cd,5dDPDCH5cd,2dDPDCH2cd,4dcc cDPCCHSDPDCH4cd,6dDPDCH6Figure 1: Spreading for uplink DPCCH and DPDCHs After channelization, the real-valued spread signals are weighted by gain factors, cfor DPCCH, and dfor all DPDCHs. The cand dvalues a
45、re signalled by higher layers or calculated as described in TS 101 851-4-1 3. At every instant in time, at least one of the values cand dhas the amplitude 1,0. The cand dvalues are quantized into 4 bit words. The quantization steps are given in table 1. ETSI ETSI TS 101 851-3-1 V2.1.1 (2008-01) 9 Ta
46、ble 1: The quantization of the gain parameters Signalling values for cand dQuantized amplitude ratios cand d15 1,0 14 14/15 13 13/15 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- a
47、nd 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 rad
48、io frame. 4.2.2 PRACH 4.2.2.1 PRACH preamble part The PRACH preamble part consists of a complex-valued code, described in clause 4.3.3. 4.2.2.2 PRACH message part Figure 2 illustrates the principle of the spreading and scrambling of the PRACH message part, consisting of data and control parts. The b
49、inary control and data parts 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“ is mapped to the real value -1. The control part is spread to the chip rate by the channelization code cc, while the data part is spread to the chip rate by the channelization code cd. jccccddSr-msg,nI+jQPRACH messagecontrol partPRACH messagedata partQISFigure 2: Spreading of PRACH message part After channelization, the real-valued spread signals are weigh
