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1、 Reference number ISO 22641:2005(E) ISO 2005 INTERNATIONAL STANDARD ISO 22641 First edition 2005-07-15 Space data and information transfer systems TM (telemetry) synchronization and channel coding Systmes de transfert des donnes et informations spatiales Synchronisation TM (tlmesure) et codage de ca
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5、ss given below. ISO 2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs
6、member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reserved ISO 22641:2005(E) ISO 2005 All rights reserved iii Forewor
7、d ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technica
8、l committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of ele
9、ctrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to th
10、e member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for ide
11、ntifying any or all such patent rights. ISO 22641 was prepared by the Consultative Committee for Space Data Systems (CCSDS) (as CCSDS 131.0-B-1, September 2003) and was adopted (without modifications except those stated in Clause 2 of this International Standard) by Technical Committee ISO/TC 20, Ai
12、rcraft and space vehicles, Subcommittee SC 13, Space data and information transfer systems. INTERNATIONAL STANDARD ISO 22641:2005(E) ISO 2005 All rights reserved 1 Space data and information transfer systems TM (telemetry) synchronization and channel coding 1 Scope This International Standard specif
13、ies synchronization and channel coding schemes used in conjunction with the telemetry (TM) space data link protocol as defined by ISO 22645 or the advanced orbiting systems (AOS) space data link protocol defined by ISO 22666. These schemes are to be used over space-to-ground or space-to-space commun
14、ications links by space missions. The scope and field of application are furthermore detailed in subclauses 1.1 and 1.2 of the enclosed CCSDS publication. 2 Requirements Requirements are the technical recommendations made in the following publication (reproduced on the following pages), which is ado
15、pted as an International Standard: CCSDS 131.0-B-1, September 2003, TM synchronization and channel coding. For the purposes of international standardization, the modifications outlined below shall apply to the specific clauses and paragraphs of publication CCSDS 131.0-B-1. Pages i to v This part is
16、information which is relevant to the CCSDS publication only. Page 1-5 Add the following information to the references indicated: 1 Document CCSDS 132.0-B-1, September 2003, is equivalent to ISO 22645:2005. 2 Document CCSDS 732.0-B-1, September 2003, is equivalent to ISO 22666:2005. Page B-1 Add the
17、following information to the references indicated: B2 Document CCSDS 101.0-B-6, October 2002, is equivalent to ISO 11754:1). It has been agreed with the Consultative Committee for Space Data Systems that Subcommittee ISO/TC 20/SC 13 will be consulted in the event of any revision or amendment of publ
18、ication CCSDS 131.0-B-1. To this end, NASA will act as a liaison body between CCSDS and ISO. 1) To be published. (Revision of ISO 11754:2003) ISO 22641:2005(E) 2 ISO 2005 All rights reserved (blank page) ISO 22641:2005(E) ISO 2005 All rights reserved 3 ? ? ? ? ? ? RECOMMENDATION FOR SPACE DATA SYSTE
19、M STANDARDS TM SYNCHRONIZATION AND CHANNEL CODING CCSDS 131.0-B-1 BLUE BOOK September 2003 ISO 22641:2005(E) 4 ISO 2005 All rights reserved (blank page) ISO 22641:2005(E) ISO 2005 All rights reserved 5 CCSDS RECOMMENDATION FOR TM SYNCHRONIZATION AND CHANNEL CODING CCSDS 131.0-B-1 Page i September 20
20、03 AUTHORITY Issue: Blue Book, Issue 1 Date: September 2003 Location: Not Applicable This document has been approved for publication by the Management Council of the Consultative Committee for Space Data Systems (CCSDS) and represents the consensus technical agreement of the participating CCSDS Memb
21、er Agencies. The procedure for review and authorization of CCSDS Recommendations is detailed in the Procedures Manual for the Consultative Committee for Space Data Systems (reference B1), and the record of Agency participation in the authorization of this document can be obtained from the CCSDS Secr
22、etariat at the address below. This Recommendation is published and maintained by: CCSDS Secretariat Office of Space Communication (Code M-3) National Aeronautics and Space Administration Washington, DC 20546, USA ISO 22641:2005(E) 6 ISO 2005 All rights reserved CCSDS RECOMMENDATION FOR TM SYNCHRONIZ
23、ATION AND CHANNEL CODING CCSDS 131.0-B-1 Page ii September 2003 STATEMENT OF INTENT The Consultative Committee for Space Data Systems (CCSDS) is an organization officially established by the management of member space Agencies. The Committee meets periodically to address data systems problems that a
24、re common to all participants, and to formulate sound technical solutions to these problems. Inasmuch as participation in the CCSDS is completely voluntary, the results of Committee actions are termed Recommendations and are not considered binding on any Agency. This Recommendation is issued by, and
25、 represents the consensus of, the CCSDS Plenary body. Agency endorsement of this Recommendation is entirely voluntary. Endorsement, however, indicates the following understandings: Whenever an Agency establishes a CCSDS-related standard, this standard will be in accord with the relevant Recommendati
26、on. Establishing such a standard does not preclude other provisions which an Agency may develop. Whenever an Agency establishes a CCSDS-related standard, the Agency will provide other CCSDS member Agencies with the following information: The standard itself. The anticipated date of initial operation
27、al capability. The anticipated duration of operational service. Specific service arrangements are made via memoranda of agreement. Neither this Recommendation nor any ensuing standard is a substitute for a memorandum of agreement. No later than five years from its date of issuance, this Recommendati
28、on will be reviewed by the CCSDS to determine whether it should: (1) remain in effect without change; (2) be changed to reflect the impact of new technologies, new requirements, or new directions; or, (3) be retired or canceled. In those instances when a new version of a Recommendation is issued, ex
29、isting CCSDS- related Agency standards and implementations are not negated or deemed to be non-CCSDS compatible. It is the responsibility of each Agency to determine when such standards or implementations are to be modified. Each Agency is, however, strongly encouraged to direct planning for its new
30、 standards and implementations towards the later version of the Recommendation. ISO 22641:2005(E) ISO 2005 All rights reserved 7 CCSDS RECOMMENDATION FOR TM SYNCHRONIZATION AND CHANNEL CODING CCSDS 131.0-B-1 Page iii September 2003 FOREWORD This document is a technical Recommendation for use in deve
31、loping synchronization and channel coding systems and has been prepared by the Consultative Committee for Space Data Systems (CCSDS). The synchronization and channel coding concept described herein is intended for missions that are cross-supported between Agencies of the CCSDS. This Recommendation e
32、stablishes a common framework and provides a common basis for the synchronization and channel coding schemes to be used by space missions with the TM or AOS Space Data Link Protocol (references 1 or 2) over space-to-ground and space-to-space communications links. This Recommendation was developed by
33、 consolidating the specifications regarding synchronization and channel coding in older CCSDS Recommendations B2 and B3. This Recommendation does not change the major technical contents defined in B2 and B3, but the presentation of the specification has been changed so that: a) these schemes can be
34、used to transfer any data over any space link in either direction; b) all CCSDS space link protocols are specified in a unified manner; c) the layered model matches the Open Systems Interconnection (OSI) Basic Reference Model (reference 3). Together with the change in presentation, a few technical s
35、pecifications in B2 and B3 have been changed in order to define all Space Data Link Protocols in a unified way. Also, some technical terms in references B2 and B3 have been changed in order to unify the terminology used in all the CCSDS Recommendations that define space link protocols and to define
36、these schemes as general communications schemes. These changes are listed in annex E of this Recommendation. Through the process of normal evolution, it is expected that expansion, deletion or modification to this document may occur. This Recommendation is therefore subject to CCSDS document managem
37、ent and change control procedures, as defined in the Procedures Manual for the Consultative Committee for Space Data Systems. Current versions of CCSDS documents are maintained at the CCSDS Web site: http:/www.ccsds.org/ Questions relating to the contents or status of this document should be address
38、ed to the CCSDS Secretariat at the address indicated on page i. ISO 22641:2005(E) 8 ISO 2005 All rights reserved CCSDS RECOMMENDATION FOR TM SYNCHRONIZATION AND CHANNEL CODING CCSDS 131.0-B-1 Page iv September 2003 At time of publication, the active Member and Observer Agencies of the CCSDS were: Me
39、mber Agencies Agenzia Spaziale Italiana (ASI)/Italy. British National Space Centre (BNSC)/United Kingdom. Canadian Space Agency (CSA)/Canada. Centre National dEtudes Spatiales (CNES)/France. Deutsches Zentrum fr Luft- und Raumfahrt e.V. (DLR)/Germany. European Space Agency (ESA)/Europe. Instituto Na
40、cional de Pesquisas Espaciais (INPE)/Brazil. National Aeronautics and Space Administration (NASA)/USA. National Space Development Agency of Japan (NASDA)/Japan. Russian Space Agency (RSA)/Russian Federation. Observer Agencies Austrian Space Agency (ASA)/Austria. Central Research Institute of Machine
41、 Building (TsNIIMash)/Russian Federation. Centro Tecnico Aeroespacial (CTA)/Brazil. Chinese Academy of Space Technology (CAST)/China. Commonwealth Scientific and Industrial Research Organization (CSIRO)/Australia. Communications Research Laboratory (CRL)/Japan. Danish Space Research Institute (DSRI)
42、/Denmark. European Organization for the Exploitation of Meteorological Satellites (EUMETSAT)/Europe. European Telecommunications Satellite Organization (EUTELSAT)/Europe. Federal Service of Scientific, Technical b) data formats; and c) the procedures performed to generate and process the data format
43、s. It does not specify: a) individual implementations or products; b) the methods or technologies required to perform the procedures; or c) the management activities required to configure and control the system. 1.3 APPLICABILITY This Recommendation applies to the creation of Agency standards and to
44、 the future data communications over space links between CCSDS Agencies in cross-support situations. This Recommendation includes comprehensive specification of the data formats and procedures for inter-Agency cross support. It is neither a specification of, nor a design for, real systems that may b
45、e implemented for existing or future missions. The Recommendation specified in this document is to be invoked through the normal standards programs of each CCSDS Agency, and is applicable to those missions for which cross support based on capabilities described in this Recommendation is anticipated.
46、 Where mandatory capabilities are clearly indicated in sections of this Recommendation, they must be implemented when this document is used as a basis for cross support. Where options are allowed or implied, implementation of these options is subject to specific bilateral cross support agreements be
47、tween the Agencies involved. ISO 22641:2005(E) 14 ISO 2005 All rights reserved CCSDS RECOMMENDATION FOR TM SYNCHRONIZATION AND CHANNEL CODING CCSDS 131.0-B-1 Page 1-2 September 2003 1.4 RATIONALE The CCSDS believes it is important to document the rationale underlying the recommendations chosen, so t
48、hat future evaluations of proposed changes or improvements will not lose sight of previous decisions. 1.5 DOCUMENT STRUCTURE This document is divided into nine numbered sections and six annexes: a) section 1 presents the purpose, scope, applicability and rationale of this Recommendation and lists th
49、e conventions, definitions, and references used throughout the document; b) section 2 provides an overview of synchronization and channel coding; c) section 3 specifies the convolutional coding; d) section 4 specifies the Reed-Solomon coding; e) section 5 specifies the turbo coding; f) section 6 specifies the frame synchronization scheme; g) section 7 specifies the Pseudo-Randomizer; h) section 8 specifie