1、 ETSI EN 301 926 V1.3.1 (2017-10) Satellite Earth Stations and Systems (SES); Radio Frequency and Modulation Standard for Telemetry, Command and Ranging (TCR) of Communications Satellites EUROPEAN STANDARD ETSI ETSI EN 301 926 V1.3.1 (2017-10) 2 Reference REN/SES-00401 Keywords coding, modulation, s
2、atellite, telemetry 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 The present document can be
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7、t the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. ETSI 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are trademarks of ETSI r
8、egistered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSM and the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI EN 301 926 V1.3.1 (2017-10) 3 Contents Intellectual Property Rights 5g
9、3Foreword . 5g3Modal verbs terminology 5g31 Scope 6g32 References 7g32.1 Normative references . 7g32.2 Informative references 8g33 Definitions and abbreviations . 8g33.1 Definitions 8g33.2 Abbreviations . 11g34 Modulation Requirements 12g34.1 General . 12g34.2 Frequency and Phase Modulations . 13g34
10、.2.1 Modulating waveforms . 13g34.2.2 PCM waveforms and data rates 14g34.2.3 Use of subcarriers . 15g34.2.4 Choice of Subcarrier Frequencies . 15g34.2.5 Uplink Carrier Frequency Deviation (Frequency Modulation) . 16g34.2.6 Uplink PM Modulation Index . 16g34.2.7 Downlink PM Modulation Index 16g34.2.8
11、 Sense of Modulation . 16g34.2.9 Data Transition Density 16g34.2.10 Modulation Linearity 16g34.2.11 Residual Amplitude Modulation . 17g34.2.12 Residual Carrier, Out-of-band Emission and Discrete Spectral Lines 17g34.3 Spread Spectrum Modulation . 18g34.3.1 General 18g34.3.2 Chip Shaping 20g34.3.3 Ou
12、t-of-Band Emission and Discrete Spectral Lines . 20g34.4 Coherency Properties . 20g35 Requirements on Transmitted Signals 21g35.1 Frequency Stability. 21g35.1.1 Uplink . 21g35.1.2 Downlink 21g35.2 Turnaround Frequency Ratio 21g35.3 Polarization. 21g35.4 Phase Noise 21g35.4.1 Ground Transmitter. 21g3
13、5.4.2 On-board Transmitter . 22g36 Link Acquisition Requirements 22g36.1 Link Acquisition Performance . 22g36.2 Phyical Layer Operations Procedures . 22g37 Coding and Interleaving . 23g37.1 Uplink . 23g37.2 Downlink 23g3Annex A (informative): Operational Configuration 24g3A.1 Introduction 24g3A.2 Co
14、nfiguration Baseline: on board spread spectrum transponder 25g3A.3 Configuration Alternative 1: on board dual mode receiver and on board dual mode transmitter 26g3A.4 Configuration Alternative 2: on board dual mode receiver and phase modulation transmitter 27g3ETSI ETSI EN 301 926 V1.3.1 (2017-10) 4
15、 A.5 Configuration Alternative 3: on board dual mode receiver, phase modulation transmitter and dedicated RG SS transmitter 29g3A.6 Configuration Alternative 4: on board dual mode multi-channel receiver and on board dual mode transmitter (for hosted payload management) 30g3Annex B (informative): Hyb
16、rid Ranging process description 32g3B.1 Introduction 32g3B.2 Presentation 32g3B.3 Distance ambiguity resolution 33g3Annex C (informative): Modulator imperfections . 34g3C.1 Phase imbalance . 34g3C.2 BPSK phase imbalance 34g3C.3 QPSK phase imbalance 34g3C.4 Amplitude imbalance . 34g3C.5 Data asymmetr
17、y 35g3C.6 Data bit jitter . 35g3C.7 PN code asymmetry 35g3C.8 PN code chip jitter 35g3C.9 Chip transition time 35g3C.10 I/Q data bit skew 36g3C.11 I/Q PN code chip skew . 36g3Annex D (informative): SRRC chip filtering . 37g3Annex E (normative): PN code assignment, generation and set specification 39
18、g3E.1 PN codes . 39g3E.2 PN code assignment . 39g3E.3 PN code generation 39g3E.3.1 PN code generator types . 39g3E.3.1a Telecommand uplink or in-phase channel (Mode MTC2, MTC3 Acquisition) . 42g3E.3.2 Ranging uplink or quadrature channel (Mode MTC2) . 42g3E.3.3 Telecommand and ranging uplink (Mode M
19、TC3 Tracking) 43g3E.4 Telemetry Downlink. 43g3E.4.1 Coherent ranging mode (Mode MTM2) . 43g3E.4.2 Non coherent mode (Mode MTM3) . 43g3E.5 Baseline PN code set specification . 43g3E.6 Extended PN code library. 45g3E.7 Code Examples . 46g3E.8 PN CODE REQUEST FORM 49g3E.8.1 Form . 49g3E.8.2 Description
20、 and Instructions . 49g3Annex F (informative): Performance computations . 51g3Annex G (informative): Bandwidth considerations and assumptions . 52g3History 53g3ETSI ETSI EN 301 926 V1.3.1 (2017-10) 5 Intellectual Property Rights Essential patents IPRs essential or potentially essential to the presen
21、t 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); Essential, or potentially Essential, IPRs notified to ETSI in resp
22、ect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). 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
23、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. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no o
24、wnership of these except for any which are indicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associate
25、d with those trademarks. Foreword This European Standard (EN) has been produced by ETSI Technical Committee Satellite Earth Stations and Systems (SES). National transposition dates Date of adoption of this EN: 20 September 2017 Date of latest announcement of this EN (doa): 31 December 2017 Date of l
26、atest publication of new National Standard or endorsement of this EN (dop/e): 30 June 2018 Date of withdrawal of any conflicting National Standard (dow): 30 June 2018 Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“,
27、“can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI EN 301 926 V1.3.1 (2017-10) 6 1 Scope The present
28、document applies to the Telemetry, Command and Ranging (TCR) system of Communication Satellites (geosynchronous or not), operating in the following frequency bands: 5 725 MHz to 7 025 MHz uplink, 3 400 MHz to 4 200 MHz and 4 500 MHz to 4 800 MHz downlink (“C-band“); 12 750 MHz to 13 250 MHz, 13 750
29、MHz to 14 800 MHz and 17 300 MHz to 18 400 MHz uplink, 10 700 MHz to 12 750 MHz and 13 400 MHz to 13 650 MHz downlink (“Ku-band“); 27 500 MHz to 30 000 MHz uplink, 17 700 MHz to 20 200 MHz downlink (“Commercial Ka-band“). Although not explicitly addressed in the present document, possible usage in o
30、ther bands allocated to FSS/MSS/BSS/SOS between 1 GHz to 51,4 GHz may be envisaged. The TCR receiver and transmitter can have a frequency flexibility capability over a given RF band, Typical frequency step is 100 kHz. The present document sets out the minimum performance requirements and technical c
31、haracteristics of the ground/satellite Radio Frequency (RF) interface based on Frequency Modulation (FM), Phase Modulation (PM) and Code Division Multiple Access (CDMA). With the growing number of satellites, the co-location constraints and the maximization of bandwidth for Communications Missions,
32、real and potential interference cases have motivated the elaboration of the present document for geostationary satellites based on CDMA techniques. The present document addresses the following applications: Telemetry. Command (Telecommand). Ranging. Hosted Payload Management. The aim of the present
33、document is to replace and enhance the prior document ETSI EN 301 926 i.2 (V1.2.1). The present documents provisions also apply for use cases of autonomous control of hosted payloads. It is recognized that hosted payloads may require only a subset of the functionality. The present document applies t
34、o the typical TCR scenario shown on figure 1. The scenario includes multiple satellites, which may be located in the same orbital location (GSO), or that can be in common view of a given TCR station during NGSO phases (such as transfer phase to GEO, or during NGSO operations). These satellites may b
35、e controlled by m different TCR ground stations. The TCR links defined in the present document have also to coexist with the communication ground terminals also shown on figure 1. Some of the satellites to be controlled may use FM/PM waveforms, and some may use a CDMA waveform, as defined later in t
36、he present document. The scenario may also include, for some of the satellites, hosted payloads, which can be controlled independently of the satellite platform and of the main payload. The present document defines the modulation and coding on the TCR and HPM links. Modulation formats are specified
37、in clause 4 and coding in clause 7. ETSI ETSI EN 301 926 V1.3.1 (2017-10) 7 Figure 1: Communications satellites scenario 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific refe
38、rences, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at https:/docbox.etsi.org/Reference/. NOTE:
39、 While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are necessary for the application of the present document. 1 CCSDS 231.0-B-x: “TC Synchronization and Channel Coding“. 2 CCSDS 131.0
40、-B-x: “TM Synchronization and Channel Coding“. NOTE: CCSDS standards always include the issue number on their numbering system; the parameter x on references 1 and 2 is understood as the highest published number and therefore latest issue of the standard. ETSI ETSI EN 301 926 V1.3.1 (2017-10) 8 2.2
41、Informative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendm
42、ents) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particul
43、ar subject area. i.1 ETSI TR 101 956: “Satellite Earth Stations and Systems (SES); Technical analysis of Spread Spectrum Solutions for Telemetry Command and Ranging (TCR) of Geostationary Communications Satellites“. i.2 ETSI EN 301 926 (V1.2.1) (06-2002): “Satellite Earth Stations and Systems (SES);
44、 Radio Frequency and Modulation Standard for Telemetry, Command and Ranging (TCR) of Geostationary Communications Satellites“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: binary channel: binary communications ch
45、annel (BPSK has 1 channel, QPSK has 2 channels) channel symbol rate: rate of binary elements, considered on a single wire, after FEC coding and channel allocation NOTE: See figures 3, 4 and 5. This applies only to multi-channel modulations, thus to spread spectrum QPSK modes and not to PM/FM modes.
46、Co-located Equivalent Capacity (CEC): number of collocated satellites that can be controlled with a perfect power balanced link between the ground and the satellite Code Division Multiple Access (CDMA): technique for spread-spectrum multiple-access digital communications that creates channels throug
47、h the use of unique code sequences Command Link Transmission Unit (CLTU): telecommand protocol data structure providing synchronization for the codeblock and delimiting the beginning of user data NOTE: See 1, section 4 for further details. data rate: total number of uncoded data bits per second afte
48、r packet and frame encoding NOTE: See figures 2, 3, 4 and 5. This is the Data Rate used in Link Budgets in ETSI TR 101 956 i.1. Direct Sequence Spread Spectrum (DSSS): form of modulation where a combination of data to be transmitted and a known code sequence (chip sequence) is used to directly modul
49、ate a carrier, e.g. by phase shift keying symbol rate: rate of binary elements, considered on a single wire, after FEC coding NOTE: See figures 2 to 5. ETSI ETSI EN 301 926 V1.3.1 (2017-10) 9 Data SourceChannel CodingWaveformFormatingBPSK ModulationRangingTonesPM or FM ModulationRFCarrierSymbol RateScope of this DocumentSubcarrierMTC1 / MTM1Block Code (optional)BCH, R-S, LDPCPseudo-Randomizer(optional)Start SequenceASMDifferentialCoder(optional)ConvolutionalCoder(optional)Bit RateChannel CodingFigure 2: Functional stages of transmit chain fo
