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GB/T 39349-2020: Space data and information transfer systems. TC (telecommand) synchronization and channel coding
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Space data and information transfer systems. TC (telecommand) synchronization and channel coding
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GB/T 39349-2020
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Basic data | Standard ID | GB/T 39349-2020 (GB/T39349-2020) | | Description (Translated English) | Space data and information transfer systems. TC (telecommand) synchronization and channel coding | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | V75 | | Classification of International Standard | 49.140 | | Word Count Estimation | 22,216 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-06-01 | | Quoted Standard | GB/T 39350; GB/T 39344 | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the technical requirements for BCH coding, LDPC coding, Communication Link Transmission Unit (CLTU), and pseudo-randomization involved in remote synchronization and channel coding in spatial data and information transmission systems. This standard is used in conjunction with GB/T 39350 and is suitable for remote control synchronization and channel coding design between air-to-ground links and air-to-air links. | GB/T 39349-2020: Space data and information transfer systems. TC (telecommand) synchronization and channel coding
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(Spatial data and information transmission system, remote control synchronization and channel coding)
ICS 49.140
V75
National Standards of People's Republic of China
Spatial data and information transmission system
Remote control synchronization and channel coding
2020-11-19 released
2021-06-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Preface Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions, abbreviations 1
3.1 Terms and definitions 1
3.2 Abbreviations 2
4 Overview 2
4.1 Architecture 2
4.2 Bit number convention 2
4.3 Function Introduction 3
4.4 Internal structure of sub-layer 3
5 BCH code 4
5.1 Overview 4
5.2 BCH code word format 5
5.3 Coding method 5
5.4 Data filling 5
5.5 Decoding process 5
6 LDPC coding 5
6.1 Overview 5
6.2 Check matrix 6
6.3 Coding method 6
6.4 Data filling 7
6.5 Decoding method 7
7 Communication Link Transfer Unit (CLTU) 7
7.1 Overview 7
7.2 CLTU unit format 7
7.3 CLTU receiving logic 8
8 Pseudo-randomization 9
8.1 Overview 9
8.2 Pseudo-randomization method 9
8.3 Applications of pseudo-randomization 10
9 Physical layer operating procedures 10
9.1 Overview 10
9.2 Data format 10
9.3 Carrier modulation mode 10
9.4 Physical layer operating procedures-1 (PLOP-1) 11
9.5 Physical Layer Operating Procedure-2 (PLOP-2) 11
10 Management parameters 12
10.1 Overview 12
10.2 BCH coding and LDPC coding parameters 12
Appendix A (informative appendix) The structural changes of this standard compared with ISO 22642.2015 14
Appendix B (informative appendix) The technical differences between this standard and ISO 22642.2015 and the reasons 16
Appendix C (Normative Appendix) Service Definition 17
Figure 1 Correspondence between remote control synchronization and channel coding and OSI model 2
Figure 2 Convention of bit number 3
Figure 3 Information flow of the synchronization and channel coding sublayer at the transmitter Figure 4
Figure 4 Information flow of the synchronization and channel coding sublayer at the receiving end Figure 4
Figure 5 BCH code word format 5
Figure 6 (63,56) Improved BCH encoder 5
Figure 7.CLTU structure using BCH coding 7
Figure 8.CLTU structure using LDPC encoding 7
Figure 9 CLTU receiving state machine (receiving end) 8
Figure 10 Block diagram of pseudo-random generator 9
Figure 11 PLOP-1 carrier modulation process 11
Figure 12 PLOP-2 carrier modulation process 12
Table 1 (n=128, k=64) LDPC code production matrix 6
Table 2 (n=512,k=256) LDPC code production matrix 7
Table 3 Definition of CLTU receiving state (receiving end) 9
Table 4 CLTU receiving event definition (receiving end) 9
Table 5 Carrier modulation mode 10
Table 6 Management parameters of BCH coding and LDPC coding Table 12
Table 7 Other management parameters of BCH encoding Table 13
Table 8 Other management parameters of LDPC codes Table 13
Table A.1 The comparison between this standard and ISO 22642.2015 chapter number 14
Table B.1 Technical differences between this standard and ISO 22642.2015 and their reasons 16
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard uses the redrafting method to amend and adopt ISO 22642.2015 "Space Data and Information Transmission System Remote Synchronization and Channel Code
code".
Compared with ISO 22642.2015, this standard has many adjustments in structure. Appendix A lists this standard and ISO 22642.2015
A list of chapter number comparisons.
Compared with ISO 22642.2015, this standard has technical differences, and the clauses involved in these differences have been
The set vertical single line (∣) is marked, and a list of the corresponding technical differences and their reasons is given in Appendix B.
This standard also made the following editorial changes.
---Deleted part of the definition of document structure and references in Chapter 1 of ISO 22642.2015;
--- Changed Appendix C "Abbreviations" in ISO 22642.2015 to 3.2;
--- Deleted the informative appendix B "Security, Space Allocation Numbers and Patent Factors" of ISO 22642.2015;
---The informative appendix D "References" of ISO 22642.2015 is deleted.
This standard was proposed and managed by the National Aerospace Technology and Application Standardization Technical Committee (SAC/TC425).
Drafting organizations of this standard. China Aerospace Standardization Institute, Beijing Space Vehicle General Design Department, Anhui Longyun Intelligent Technology Co., Ltd.
Division, Beijing University of Aeronautics and Astronautics, Xi’an Institute of Space Radio Technology, Nanjing University.
The main drafters of this standard. Xu Dongyan, Li Ke, Liu Rongke, Shen Xiaohu, Zhang Chunxiang, Zhao Kangxi, Liu Dongliang, Yang Keyuan, Zhou Yuxia,
Zhang Chuanxue.
Spatial data and information transmission system
Remote control synchronization and channel coding
1 Scope
This standard specifies the BCH coding, LDPC coding, and communication related to remote control synchronization and channel coding in spatial data and information transmission systems.
Communication link transfer unit (CLTU), pseudo-randomization technical requirements.
This standard is used in conjunction with GB/T 39350 and is suitable for remote control synchronization and channel coding design between air-to-ground links and air-to-air links.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 39350 Spatial Data and Information Transmission System Remote Control Spatial Data Link Protocol (GB/T 39350-2020, ISO 22664.2016, MOD)
GB/T 39344 Spatial data and information transmission system communication operating procedures-1 (GB/T 39344-2020, ISO 22667.2013, MOD)
3 Terms and definitions, abbreviations
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1
Communication link transmission unit
A data structure of the synchronization and channel coding sublayer, consisting of a starting sequence, one or more codewords encoded by the transmission frame, and an ending sequence (optional).
3.1.2
Transmit frame
The variable data length transmission unit specified in the remote control space data link protocol.
3.1.3
Starting sequence
A set of specific binary codes, indicating the beginning of the CLTU frame header.
3.1.4
Ending sequence
A set of specific binary codes, representing the end of the CLTU frame.
3.1.5
Idle sequence
The padding bytes between the remote control frame sequences are filled with alternate codes of "0" and "1", and the length is optional by the user, used when the remote control frame is not sent
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