1、 ETSI TS 102 551-2 V2.1.1 (2007-08)Technical Specification Satellite Earth Stations and Systems (SES);Satellite Digital Radio (SDR) Systems;Inner Physical Layer of the Radio Interface;Part 2: Multiple carrier transmissionETSI ETSI TS 102 551-2 V2.1.1 (2007-08) 2 Reference RTS/SES-00287-2 Keywords di
2、gital, layer 1, radio, satellite 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 cop
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5、us of this and 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 excep
6、t as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2007. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONT
7、Mand the TIPHON logo are Trade Marks currently being registered by ETSI 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 102 551-2 V2.1.1 (2007-08) 3 Contents Intellectual Property Rights5 F
8、oreword.5 1 Scope 6 2 References 6 3 Definitions, symbols and abbreviations .6 3.1 Definitions6 3.2 Symbols6 3.3 Abbreviations .6 4 Inner physical layer - Multi Carrier7 4.1 Interfacing to OPL (Outer Physical Layer) 8 4.2 The profile approach - different multi carrier modes .8 4.2.1 Profile definiti
9、on.8 4.2.2 Modes definition.9 4.2.3 Parameters for QPSK subcarrier mapping 9 4.2.4 Parameters for 16QAM subcarrier mapping.10 4.3 Generation of one Phy section11 4.3.1 Overview 11 4.3.1.1 Overview of mode 112 4.3.1.2 Overview of mode 2, 3 and 4 13 4.3.2 Puncturing of capacity units13 4.3.3 RFU secti
10、on insertion .14 4.3.4 Energy dispersal (scrambling) 14 4.3.5 Accumulation of CU into one Phy section14 4.4 Pilot tone insertion and signalling 15 4.4.1 Mode 1: 2k5MHz; identical to DVB-T .15 4.4.1.1 Signal constellation and mapping .15 4.4.1.2 Symbol interleaver 15 4.4.1.3 IPL-MC frame structure16
11、4.4.1.4 Reference signals 17 4.4.1.4.1 Functions and derivation .17 4.4.1.4.2 Definition of reference sequence.17 4.4.1.4.3 Location of scattered pilot cells.18 4.4.1.4.4 Location of continual pilot carriers18 4.4.1.4.5 Amplitudes of all reference information19 4.4.1.5 TPS transmission format .19 4.
12、4.1.5.1 Scope of the TPS .19 4.4.1.5.2 TPS transmission format .20 4.4.1.5.3 TPS modulation.23 4.4.2 Mode 2: 2k5MHz 23 4.4.2.1 Preamble insertion.24 4.4.2.2 Scattered pilots25 4.4.2.3 Continuous pilots 26 4.4.3 Mode 3: 1k1,7MHz .27 4.4.3.1 Preamble insertion.27 4.4.3.2 Scattered pilots28 4.4.3.3 Con
13、tinuous pilots 29 4.4.4 Mode 4: 0,5k1,7MHz 30 4.4.4.1 Preamble insertion.30 4.4.4.2 Scattered pilots31 4.4.4.3 Continuous pilots 32 4.5 Bit mapping to constellation.33 4.5.1 QPSK Modulation 33 4.5.2 16QAM Modulation (non-hierarchical)33 4.5.3 16QAM Modulation (hierarchical) .34 ETSI ETSI TS 102 551-
14、2 V2.1.1 (2007-08) 4 4.5.4 Normalization of power levels35 4.6 Pulse shaping and guard interval insertion .35 Annex A (informative): Bibliography.36 History 37 ETSI ETSI TS 102 551-2 V2.1.1 (2007-08) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may h
15、ave been declared 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 stan
16、dards“, which is 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 ot
17、her IPRs not referenced 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). An SDR syste
18、m enables broadcast to fixed and mobile receivers through satellites and complementary terrestrial transmitters. Functionalities, architecture and technologies of such systems are described in TR 102 525 (see bibliography). The present document is part 2 of a multi-part deliverable covering the Sate
19、llite Digital Radio (SDR) Systems; Inner Physical Layer of the Radio Interface, as identified below: Part 1: “Single carrier transmission“; Part 2: “Multiple carrier transmission“; Part 3: “Multiple carrier transmission Mode 1“. Several existing and planned ETSI standards specify parts of the SDR sy
20、stem, with the aim of interoperable implementations. The physical layer of the radio interface (air interface) is divided up into the outer physical layer, the inner physical layer with a single carrier transmission, and the inner physical layer with multiple carriers transmission. These parts can b
21、e used all together in SDR compliant equipment, or in conjunction with other existing and future specifications. The present document specifies the inner physical layer with multiple carrier transmission. The inner physical layer with single carrier transmission is specified in TS 102 551-1 (see bib
22、liography), and the outer physical layer in TS 102 550 (see bibliography). The present version 2.1.1 supersedes version 1.1.1 and is not compatible with it. Changes from version 1.1.1 are: 1) Notes saying that the “AMSS preamble“ is under study have been removed, since this technical element is no l
23、onger foreseen. 2) The description of the Mode 1 has been changed in order to make the standard easier to use. The current version makes reference to an ETSI DVB standard and lists the differences. In the revised version the relevant part of the ETSI DVB standard EN 301 744 is copied. 3) The Mode 1
24、has been changed in order to increase commonalities with the DVB-SH EN 302 583 standard. 4) The pilot structure for Modes 2 to 4 has been changed. The items 1 and 2 are editorial changes, while 3 and 4 are non-backward compatible technical changes. ETSI ETSI TS 102 551-2 V2.1.1 (2007-08) 6 1 Scope T
25、he present document concerns the radio interface of SDR broadcast receivers. It specifies functionality of the inner physical layer. It allows implementing this part of the system in an interoperable way. The present document specifies the case of multiple carrier transmission, whereas TS 102 551-1
26、(see bibliography) specifies single carrier transmission. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication and/or edition number or version n
27、umber) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any
28、 hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 1 ETSI EN 300 744 (V1.5.1): “Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for digital terrestrial television“. 3 Definitions, symbols and ab
29、breviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: : constellation ratio which determines the QAM constellation for the modulation for hierarchical transmission 3.2 Symbols For the purposes of the present document, the following symbols a
30、pply: 2k5MHz OFDM with 2k (i.e. 2 048 length) IFFT in 5 MHz channel spacing hierarchical constellation scaling factor 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: 16QAM 16 Quadrature Amplitude Modulation AMSS Amplitude Modulated Spreading Sequence C-
31、TS Channel Transport Stream CU Capacity Unit DBPSK Differential Binary Phase Shift Keying DVB Digital Video Broadcasting FFT Fast Fourier Transform IFFT Inverse Fast Fourier Transform IPL Inner Physical Layer ETSI ETSI TS 102 551-2 V2.1.1 (2007-08) 7 IPL-MC Inner Physical Layer, Multiple Carrier IPL
32、-SC Inner Physical Layer, Single Carrier OFDM Orthogonal Frequency Division Multiplex OPL Outer Physical Layer PRBS Pseudo Random Binary Sequence QAM Quadrature Amplitude Modulation QPSK Quaternary Phase Shift Keying RF Radio Frequency RFU Reserved for Future Use TPS Transmission Parameter Signallin
33、g XOR EXclusive OR 4 Inner physical layer - Multi Carrier The functionality of the Inner Physical Layer (Multi Carrier), in the following denoted IPL-MC, is to provide a robust modulation scheme for multi carrier transmission. The multi carrier transmission is applicable either to satellite or terre
34、strial transmission. The IPL-MC is embedded between the OPL (C-TS delivery) and the RF frontend (modulation) as depicted in Figure 1. Figure 1: General block diagram of the ETSI SES SDR system concept with selection of IPL-MC The general block diagram of the IPL-MC functionality for either modes 1 o
35、r modes 2, 3 and 4 are given in figures 2 and 3. Figure 2: Block diagram of the ETSI SES SDR compliant IPL-MC in mode 1 Figure 3: Block diagram of the ETSI SES SDR compliant IPL-MC in mode 2, 3 and 4 To achieve maximum commonalities with existing, wide-spread standards like DVB-T and its successor D
36、VB-H, one profile is based on EN 300 744 1. To increase the robustness in rapidly changing channels or high delay spread scenarios, three modes using a higher pilot density together with a distinct frequency-domain preamble are introduced. ETSI ETSI TS 102 551-2 V2.1.1 (2007-08) 8 4.1 Interfacing to
37、 OPL (Outer Physical Layer) Its interface to the OPL (Outer Physical Layer) is the C-TS (channel transport stream), which is defined in TS 102 550 (see bibliography). For this special IPL-MC, the parameters which are passed to the OPL are derived within TS 102 550 (see bibliography). Two types of IP
38、L-MC exist: One providing a single-input C-TS interface, another providing double-input interface to allow hierarchical modulation. In the latter case, both C-TS need to be aligned in time, framing and throughput. If more than one carrier needs to be supported, multiple instances of the IPL-MC need
39、to be instantiated in parallel. The parameters that are passed to the OPL are as follows: IPL-MC frame length in integer number of CU (capacity units); IPL-MC frame length in number of IPL-MC symbols; number of inputs (to distinguish between normal and hierarchical transmission). For mode 1, the len
40、gth of one IPL-MC frame equals the length of the DVB-T superframe, whereas the length of one Phy sections equals the length of one DVB-T frame. Four Phy sections compose on IPL-MC frame in mode 1. The notations “IPL-MC frame“ and “Phy sections“ will be used throughout the document instead of “DVB-T
41、superframe“ and “DVB-T frame“. For modes 2 to 4, one IPL-MC frame is composed of five Phy sections and preceded by one preamble. Their parameters are defined in clause 4.2.2. With these parameters, the exact throughput of the IPL-MC can be derived in CU per time. The smallest unit to be processed by
42、 the IPL-MC is one CU. To be able to benefit from the gain of hybrid configurations (e.g. using IPL-SC together with IPL-MC), it is mandatory to have equal frame lengths on both IPLs. If modes 2, 3 or 4 of the IPL-MC are used, a joint frame length of 432 ms is chosen. For mode 1 of the IPL-MC, the j
43、oint frame length is 487,424 ms (4 121,856 ms) or 438,68 ms (4 109,67 ms), dependent on the selection of the guard interval. This is achieved by concatenation of an integer number of IPL-MC frames. 4.2 The profile approach - different multi carrier modes 4.2.1 Profile definition To cope with differe
44、nt design constraints that arise from the possible use scenarios of the IPL-MC, it has been decided within SES SDR to define different profiles. The main target frequency bands and channel bandwidths are: Table 1: Definition of different profiles Profile name IPL-MC-A IPL-MC-B IPL-MC-C IPL-MC-D Typi
45、cal use S-Band DVB-T S-Band SDR L-Band SDR S-Band SDR Supported modes 1 2 3 and 4 3 and 4 Carrier frequency 2,0 GHz to 2,3 GHz 2,0 GHz to 2,3 GHz 1,4 GHz to 1,5 GHz 2,0 GHz to 2,3 GHz Channel bandwidth 4,76 MHz 4,76 MHz 1,536 MHz 1,536 MHz Channel spacing 5 MHz 5 MHz 1,712 MHz 1,712 MHz The present
46、document does not restrict its use to the application scenarios as denoted above. Other frequency bands or channel bandwidths may be used but the parameter selection may not be optimal. Due to the definition of a framing adaptation layer towards the IPL of DVB-T, the complete IPL of DVB-T can be reu
47、sed without any changes. However, only the 2k mode of DVB-T is considered here. ETSI ETSI TS 102 551-2 V2.1.1 (2007-08) 9 4.2.2 Modes definition The different modes that are defined are as follows. Table 2: Definition of different modes Mode 1 2k5MHz pilots equal to DVB-T IPL identical to IPL of DVB
48、-T. Parameter set inline with DVB-T 5 MHz mode (4,76 MHz bandwidth, 2k number of sub-carriers) Mode 2 2k5MHz new pilot pattern Mode optimized for requirements of frequency bands using channel spacing of 5 MHz with 2k number of carriers. Parameter set recommended for networks with high delay spread a
49、nd high vehicle speed Mode 3 1k1,7MHz new pilot pattern Mode optimized for requirements of frequency bands using channel spacing of 1,7 MHz. Parameter set recommended for networks with very high delay spread (e.g. SFN network with high power repeater), 1k number of carriers, preamble symbol, continuous and scattered pilots with pilot density of approximately 17 % Mode 4 0,5k1,7MHz new pilot pattern Similar to mode 3. Support of higher vehicle speed (carrier spacing doubled, shorter guard interval), 0,5k number of carriers While mode 1 is identica
