GB/T 39348-2020 English PDFUS$989.00 · In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 39348-2020: Space data and information transfer systems - TM (telemetry)synchronization and channel coding Status: Valid
Basic dataStandard ID: GB/T 39348-2020 (GB/T39348-2020)Description (Translated English): Space data and information transfer systems - TM (telemetry)synchronization and channel coding Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: V75 Classification of International Standard: 49.140 Word Count Estimation: 53,540 Date of Issue: 2020-11-19 Date of Implementation: 2021-06-01 Quoted Standard: GB/T 2900.54; GB/T 39345; GB/T 39349; GB/T 39351 Adopted Standard: ISO 22641-2012, MOD 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 convolutional codes, RS codes, Turbo codes, LDPC codes, interleaving and pseudo-randomization involved in telemetry synchronization and channel coding in spatial data and information transmission systems. This standard applies to the interface design of air-to-ground links and channel coding between air-to-air links. It can be used in conjunction with GB/T 39351 or GB/T 39345. GB/T 39348-2020: Space data and information transfer systems - TM (telemetry)synchronization and channel coding---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Space data and information transfer systems - TM (telemetry)synchronization and channel coding ICS 49.140 V75 National Standards of People's Republic of China Spatial data and information transmission system Telemetry 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 contentsPreface Ⅴ 1 Scope 1 2 Normative references 1 3 Terms and definitions, abbreviations 1 3.1 Terms and definitions 1 3.2 Abbreviations 2 4 General 3 4.1 Architecture 3 4.2 Function Introduction 4 4.3 Internal organization of sub-layers 4 5 Convolutional code 6 5.1 Overview 6 5.2 General requirements 6 5.3 Basic convolutional codes 7 5.4 Punctured convolutional codes 8 6 RS code (Reed-Solomon code) 9 6.1 Overview 9 6.2 General requirements 9 6.3 Characteristics of RS code 9 6.4 Symbol interleaving 13 7 Cascade code 13 7.1 The combination of cascade 13 7.2 Inner code and outer code 13 7.3 Block diagram of cascaded channel coding system 13 8 Turbo Code 14 8.1 Overview 14 8.2 General requirements 14 8.3 Features of Standard Turbo Code 14 8.4 Synchronization identification 18 9 LDPC code transmission frame 18 9.1 Overview 18 9.2 General requirements 19 9.3 LDPC code with coding rate of 223/255 19 9.4 LDPC code clusters with coding rates of 1/2, 2/3 and 4/5 22 9.5 Synchronization identification 25 10 Frame synchronization 25 10.1 Overview 25 10.2 Additional Synchronization Mark (ASM) 26 10.3 Bit pattern of ASM 26 10.4 Location of ASM 28 10.5 The relationship between ASM and RS, Turbo and LDPC code blocks and code words 28 10.6 ASM embedded in the data stream 28 11 Pseudo-randomization 28 11.1 Overview 28 11.2 Description of pseudo-randomization 28 11.3 Synchronization and application of pseudo-randomization 29 11.4 Pseudo-random sequence 29 12 Transmission frame length 29 13 Management parameters 30 13.1 Overview 30 13.2 Encoding selection 30 13.3 Parameter setting 31 Appendix A (informative appendix) The structural changes of this standard compared with ISO 22641.2012 32 Appendix B (informative appendix) Technical differences between this standard and ISO 22641.2012 and their reasons 34 Appendix C (Normative Appendix) Service Definition 36 Appendix D (informative appendix) RS code generator polynomial coefficient expansion 38 Appendix E (informative appendix) Conversion between Berlekamp representation and conventional representation 39 Appendix F (informative appendix) 223/255 ratio LDPC code 45 Appendix G (Informative Appendix) Cyclic Redundancy (CRC) Error Detection Code Application 47 Figure 1 The relationship between TM synchronization and channel coding and OSI layer 3 Figure 2 The internal process of the synchronization and coding sublayer at the transmitter 5 Figure 3 The internal flow of synchronization and coding sublayer at the receiving end 6 Figure 4 Schematic diagram of convolutional encoder 7 Figure 5 Principle diagram of punctured encoder 8 Figure 6 RS code block structure 11 Figure 7 Block diagram of RS interleaving coding 13 Figure 8 Block diagram of the cascaded channel coding system 14 Figure 9 Block diagram of Turbo encoder 16 Figure 10 Turbo code word 16 under different coding rate Figure 11 Data arrangement description 17 Figure 12 Turbo code word 18 with additional synchronization identification Figure 13 (8176, 7156) code check matrix 19 Figure 14 (8176, 7154) code generator matrix 21 Figure 15 (8160, 7136) code word diagram 22 Figure 16 ASM bit pattern without coding, convolutional code, RS code, concatenated code and 7/8 rate LDPC code 27 Figure 17 ASM bit pattern of 1/2 rate Turbo code and 1/2, 2/3, 4/5 rate LDPC code (applied to transmission frame) 27 Figure 18 ASM bit pattern of 1/3 rate Turbo code 27 Figure 19 ASM bit pattern of 1/4 rate Turbo code 27 Figure 20 ASM bit pattern of 1/6 rate Turbo code 28 Figure 21 Pseudo random generator configuration 29 Figure 22 Block diagram of pseudo-randomization logic 29 Figure E.1 Equivalent transformation relationship between conventional encoder and Berlekamp encoder 39 Figure G.1 CRC encoder diagram 48 Figure G.2 CRC decoder diagram 48 Table 1 Output sequence of punctured convolutional codes with different coding rate 8 Table 2 Information block length and code word length of different coding rate 15 Table 3 Different information block length parameters k1 and k2 17 Table 4 Circulant Matrix Requirements 20 Table 5 Code length corresponding to different coding rate 22 Table 6 The corresponding sub-matrix size M 22 for different coding rates Table 7 Definition of ϕK(0,M) and ϕK(1,M) 23 Table 8 Definition of ϕK(2,M) and ϕK(3,M) 24 Table 9 Management parameters of RS code Table 26 Table 10 Management parameters of convolutional codes Table 31 Table 11 RS code management parameter table 31 Table 12 Management parameters of Turbo codes Table 31 Table 13 LDPC code management parameter table 31 Table 14 Management parameters of frame synchronization Table 31 Table A.1 The comparison between this standard and ISO 22641.2012 chapter number 32 Table B.1 Technical differences between this standard and ISO 22641.2012 and their reasons 34 Table D.1 Coefficients of generator polynomial of RS code with E=16 38 Table D.2 Coefficients of generator polynomial of RS code with E=8 38 Table E.1 Symbol comparison table of conventional and dual basis 41 Table F.1 The circulant matrix of the generated matrix 45ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard uses the redrafting method to modify and adopt ISO 22641.2012 "Space Data and Information Transmission System Telemetry Synchronization and Channel coding". Compared with ISO 22641.2012, this standard has many structural adjustments. Appendix A lists this standard and ISO 22641.2012 The chapter number comparison list. Compared with ISO 22641.2012, this standard has technical differences, and the clauses related to 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 references to the principle definition document structure in Chapter 1 of ISO 22641.2012; --- Changed Appendix A "Abbreviations" in ISO 22641.2012 to Chapter 4 of the main text; --- Deleted the informative appendix B of ISO 22641.2012 "Security, space allocation numbers and patent factors"; ---The informative appendix E "References" of ISO 22641.2012 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, Beijing University of Aeronautics and Astronautics, Beijing Yao Institute of Measurement Technology, Xi’an Institute of Space Radio Technology, Aerospace Dongfanghong Satellite Co., Ltd. The main drafters of this standard. Zhou Yuxia, Xu Yong, Liu Rongke, Li Jionghui, Xie Tianjiao, Ding Xingwen, Han Mengfei, Liu Dongliang, Kang Dengbang, Wang Weijia and Xu Dongyan. Spatial data and information transmission system Telemetry synchronization and channel coding1 ScopeThis standard specifies convolutional codes, RS codes, Turbo codes, and convolutional codes involved in telemetry synchronization and channel coding in spatial data and information transmission systems. Technical requirements for LDPC codes, interleaving, and pseudo-randomization. This standard applies to the interface design of air-to-ground links and channel coding between air-to-air links. Can be combined with GB/T 39351 or Use with GB/T 39345.2 Normative referencesThe 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 2900.54 Electrotechnical terminology radio communication. transmitter, receiver, network and operation (GB/T 2900.54-2002, IEC 60050-713.1998, IDT) GB/T 39345 Space Data and Information Transmission System Advanced On-orbit System Space Data Link Protocol (GB/T 39345-2020, ISO 22666.2016, MOD) GB/T 39349 Spatial data and information transmission system remote synchronization and channel coding (GB/T 39349-2020, ISO 22642.2015, MOD) GB/T 39351 Spatial Data and Information Transmission System Telemetry Spatial Data Link Protocol (GB/T 39351-2020, ISO 22645.2016, MOD) 3 Terms and definitions, abbreviations 3.1 Terms and definitions The following terms and definitions defined in GB/T 2900.54 apply to this document. 3.1.1 symbol The basic data unit for transformation and processing, and its specific meaning varies depending on the application. a) For standard convolutional codes, a symbol refers to a binary code point; b) For the RS code, the symbol refers to the element in the finite field GF(2J). At this time, each symbol is composed of J bits. 3.1.2 numbers A sequence of n symbols generated by an (n, k) code encoder encoding k input information symbols. Note. This output sequence will be processed as a whole during decoding. 3.1.3 Code block Used for RS codes, a collection of I codewords, where I is the interleaving depth. When I is 1, "code block" and "code word" are equivalent. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 39348-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 39348-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 39348-2020_English with my colleagues?Answer: Yes. 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