1、 ETSI TS 102 551-1 V1.1.1 (2006-12)Technical Specification Satellite Earth Stations and Systems (SES);Satellite Digital Radio (SDR) Systems;Inner Physical Layer of the Radio Interface;Part 1: Single carrier transmissionETSI ETSI TS 102 551-1 V1.1.1 (2006-12) 2 Reference DTS/SES-00285-1 Keywords digi
2、tal, 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 copie
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6、as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2006. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMa
7、nd 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 102 551-1 V1.1.1 (2006-12) 3 Contents Intellectual Property Rights4 For
8、eword.4 1 Scope 5 2 References 5 3 Definitions, symbols and abbreviations .5 3.1 Definitions5 3.2 Symbols5 3.3 Abbreviations .5 4 Inner physical layer - Single Carrier 6 4.1 Interfacing to OPL (Outer Physical Layer) 6 4.2 The profile approach - different single carrier modes 7 4.3 Generation of one
9、Phy section7 4.3.1 Overview 7 4.3.1.1 Overview of mode 18 4.3.1.2 Overview of mode 29 4.3.2 IPL-SC signalling and padding.9 4.3.3 Energy dispersal (scrambling) 10 4.3.4 Preamble insertion 10 4.3.4.1 Mode 1: Preamble choice11 4.3.4.2 Mode 2: Preamble choice11 4.4 Bit mapping to constellation.12 4.4.1
10、 QPSK Modulation 12 4.4.2 8PSK Modulation .13 4.4.3 16APSK Modulation.13 4.5 Pulse shaping14 5 Parameter selection.14 5.1 Example 1: profile IPL-SC-A: symbol rate of 4,31 Msps 15 5.2 Example 2: profile IPL-SC-A: symbol rate of 4,33 Msps 15 5.3 Example 3: profile IPL-SC-A: symbol rate of 4,33 Msps 16
11、 5.4 Example 4: profile IPL-SC-A: symbol rate of 10,87 Msps 17 5.5 Example 5: profile IPL-SC-B: symbol rate of 1,84 Msps 17 5.6 Example 6: profile IPL-SC-B: symbol rate of 1,49 Msps 18 Annex A (informative): Bibliography.19 History 20 ETSI ETSI TS 102 551-1 V1.1.1 (2006-12) 4 Intellectual Property R
12、ights 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 ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essenti
13、al, 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:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has be
14、en 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 become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI T
15、echnical Committee Satellite Earth Stations and Systems (SES). An SDR system 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). T
16、he present document is part 1 of a multi-part deliverable covering the Satellite Digital Radio (SDR) Systems; Inner Physical Layer of the Radio Interface, as identified below: Part 1: “Single carrier transmission“; Part 2: “Multiple carrier transmission“. Several existing and planned ETSI standards
17、specify parts of the SDR system, 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 tran
18、smission. These parts can be 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 single carrier transmission. The inner physical layer with multiple carrier transmission is specifi
19、ed in TS 102 551-2 (see bibliography), and the outer physical layer in TS 102 550 (see bibliography). ETSI ETSI TS 102 551-1 V1.1.1 (2006-12) 5 1 Scope The present document concerns the radio interface of SDR broadcast receivers. It specifies functionality of the inner physical layer. It allows impl
20、ementing this part of the system in an interoperable way. The present document specifies the case of single carrier transmission, whereas TS 102 551-2 (see bibliography) specifies multiple carrier transmission. 2 References Void. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purpo
21、ses of the present document, the following terms and definitions apply: floor function: function that rounds number down, towards zero, to the nearest integer 3.2 Symbols For the purposes of the present document, the following symbols apply: roll off factor 3.3 Abbreviations For the purposes of the
22、present document, the following abbreviations apply: 16APSK 16 Amplitude and Phase Shift Keying 8PSK 8 Phase Shift Keying BW BandWidth C/N Carrier to Noise ratio C-TS Channel Transport Stream CU Capacity Unit DVB Digital Video Broadcasting I In-phase IPL Inner Physical Layer IPL-MC Inner Physical La
23、yer, Multiple Carrier IPL-SC Inner Physical Layer, Single Carrier ISI Inter Symbol Interference LSB Least Significant Bit MSB Most Significant Bit OPL Outer Physical Layer Q Quadrature QPSK Quaternary Phase Shift Keying RF Radio Frequency RFU Reserved for Future Use S-TS Service Transport Stream TS
24、ETSI Technical SpecificationETSI ETSI TS 102 551-1 V1.1.1 (2006-12) 6 4 Inner physical layer - Single Carrier The functionality of the Inner Physical Layer (Single Carrier), in the following denoted IPL-SC, is to provide a robust modulation scheme for single carrier transmissions. The single carrier
25、 transmission is mainly applicable to satellite signal transmission but may be reused in other transmission environments. However, certain parameters are especially designed and optimized for satellite requirements. The IPL-SC is embedded between the OPL (C-TS delivery) and the RF frontend (modulati
26、on) as depicted in Figure 1. Figure 1: General block diagram of the ETSI SES SDR system concept with selection of IPL-SC The general block diagram of the IPL-SC functionality is given in Figure 2. Please notify that the generation of each Phy section can be handled individually (dashed box), whereas
27、 rolloff filtering is applied to the stream of mapped symbols of many Phy section (due to its dispersive nature). Figure 2: Block diagram of the ETSI SES SDR compliant IPL-SC 4.1 Interfacing to OPL (Outer Physical Layer) Its interface to the OPL (Outer Physical Layer) is the C-TS (channel transport
28、stream), which is defined in TS 102 550 (see bibliography). For this special IPL-SC, the parameters which are passed to the OPL are derived within TS 102 550 (see bibliography). This IPL-SC provides an input for only one single C-TS and generates the signal for one RF carrier. If more than one carri
29、er need to be supported, multiple instances of the IPL-SC need to be instantiated in parallel. The parameters that are passed to the OPL are as follows: frame length in integer number of CU (capacity units) frame length in number of IPL-SC symbols One IPL-SC frame is composed by a number of Phy sect
30、ions. Their parameters are denoted in clause 5. As different modes are distinguished (see clause 4.3), the interfacing to the OPL is also slightly different for the two modes: For mode 1, it is mandatory to have integer numbers of CU which can be divided without remainder by 2 (for QPSK), by 3 (for
31、8PSK) and by 4 (for 16APSK). Other numbers of CU lead to Phy sections that miss some CU, and non-periodic preamble structure would be introduced. ETSI ETSI TS 102 551-1 V1.1.1 (2006-12) 7 For mode 2, it is desirable to have integer numbers of CU which can be divided without remainder by 2 (for QPSK)
32、, by 3 (for 8PSK) and by 4 (for 16APSK). Other numbers of CU lead to non-periodic preamble structure for the different modulation orders. Examples for a reasonable choice of parameters are given in clause 5. With these parameters, the exact throughput of the IPL-SC can be derived in CU per time, exp
33、ressed here in number of IPL-SC symbols. The smallest unit to be processed by the IPL-SC 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 TS 102
34、 551-2, were used, the joint frame length of 432 ms is chosen for the IPL-MC frame length. For mode 1 of the IPL-MC TS 102 551-2, the joint 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. 4.2 The profile approach - different sin
35、gle carrier modes To cope with different design constraints that arise from the possible use scenarios of the IPL-SC, two modes (denoted mode 1 and mode 2) are defined which use a different share of pilots. These modes are associated to profiles that are distinguished by their symbol rate and number
36、 of capacity units per inserted preamble, so that their adaptation to different channel bandwidths is easily possible. Profile IPL-SC-A is related to mode 1, and IPL-SC-B is related to mode 2, respectively. For each profile, two examples are given. To comply with the different profiles, profile IPL-
37、SC-A needs to be capable to work with all symbol rates ranging from 3 Msps up to 12 Msps. If compliance with profile IPL-SC-B is desired, symbol rates ranging from 1 Msps up to 3 Msps need to be supported. The main target frequency bands and channel bandwidths are: Table 1: Different examples for th
38、e two profiles IPL-SC-A and IPL-SC-B S-Band 4,31 Msps S-Band 4,33 Msps S-Band 4,33 Msps L-Band 10,87 Msps L-Band 1,84 Msps L-Band or S-Band 1,49 Msps Profile name IPL-SC-A IPL-SC-A IPL-SC-A IPL-SC-A IPL-SC-B IPL-SC-B Supported modes 1 1 1 1 2 2 Carrier frequency 2,0 GHz to 2,3 GHz 2,0 GHz to 2,3 GHz
39、 2,0 GHz to 2,3 GHz 1,4 GHz to 1,5 GHz 1,4 GHz to 1,5 GHz 1,4 GHz to 1,5 GHz 2,0 GHz to 2,3 GHz Channel bandwidth 4,96 MHz 4,98 MHz 4,98 MHz 12,5 MHz 2,12 MHz 1,71 MHz Symbol rate 4,31 Msps 4,33 Msps 4,33 Msps 10,87 Msps 1,84 Msps 1,49 Msps min/max symbol rate 3 Msps / 12 Msps 3 Msps / 12 Msps 3 Msp
40、s / 12 Msps 3 Msps / 12 Msps 1 Msps / 3 Msps 1 Msps / 3 Msps IPL-SC frame length 432 ms 487,424 ms 438,68 ms 432 ms 432 ms 432 ms The present 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 se
41、lection may not be optimal. 4.3 Generation of one Phy section 4.3.1 Overview One Phy section consists of the following 3 parts: preamble; data payload (capacity units, CU, etc.); signalling bits (RFU: reserved for future use). ETSI ETSI TS 102 551-1 V1.1.1 (2006-12) 8 Insertion of preambles is diffe
42、rent for mode 1 and mode 2, therefore the preamble insertion is distinguished within the following clauses. 4.3.1.1 Overview of mode 1 Figure 3 displays the generation of one Phy section in mode 1. Figure 3: Overview of the generation of one Phy section in mode 1 The length of one Phy section (in bi
43、t) depends on the chosen modulation order. The number of complex baseband symbols after mapping is kept constant in mode 1 to be 2 112 symbols for all three modulation orders. The procedure to generate one Phy section is described below. ETSI ETSI TS 102 551-1 V1.1.1 (2006-12) 9 4.3.1.2 Overview of
44、mode 2 Figure 4 displays the generation of one Phy section in mode 2. Scrambling sequence generator1 CU = 2 048 bit16 bitRFU1 CU = 2 048 bit16 bitRFUPreamble insertion1 CU = 2 048 bit16 bitRFU1 CU = 2 048 bit16 bitRFU1 CU = 2 048 bit16 bitRFU8PSK16APSKQPSK Preamble96 bit8PSK Preamble96 bit16 APSK Pr
45、eamble96 bitPhy section overall length: 2 160 bitQPSK 1 080 QPSK symbols720 8PSK symbols540 16APSK symbolsAfter mapping, the 2160 bitcorrespond to the following number of complex basebandsymbols:+feedback0001110011 1+Figure 4: Overview of the generation of one Phy section in mode 2 The length of the
46、 Phy section is defined as 2 160 bits as depicted in Figure 4. The procedure to generate one Phy section is described in the following clauses. 4.3.2 IPL-SC signalling and padding There is no signalling of transmission parameters of the IPL-SC. All transmission parameters (e.g. modulation order) can
47、 be derived from the preambles. To be able to distinguish different modulation modes, different preambles are selected. Each CU is followed by 16 signalling bits which are currently not used but are reserved for future use. All bits are set to zero. Therefore, the block sizes for one CU after bit pa
48、dding are 2 064 bit. See also Figure 3 and Figure 4. Bit padding at the end of one IPL-SC frame: Bit padding at the end of the IPL-SC frame is not required as the transport capability of one IPL-SC frame is always an integer number of Phy sections. This is ensured by the selection of the symbol rate
49、 and the frame length. CU padding at the end of one C-TS frame: As it is a mandatory requirement of the C-TS multiplexer at the output of the OPL to adapt the number of CU to the transport capability of the IPL-SC, no additional padding of empty CU is necessary; however, padding of empty CU may be foreseen to support such erroneous situations. ETSI ETSI TS 102 551-1 V1.1.1 (2006-12) 104.3.3 Energy dispersal (scrambling) Energy dispersal is applied to the data payload and the 16 RFU bits. The energy dispersal is performed using a length 2 047 (211 - 1) scrambl
