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GB/T 39354-2020Space data and information transfer systems. Proximity space link protocol. Physical layer (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

November 19, 2020

Implementation date

June 1, 2021

Scope

GB/T 39354-2020 (Space data and information transfer systems. Proximity space link protocol. Physical layer) is available as an English-translated PDF.

GB/T 39354-2020 is the Chinese standard "Space data and information transfer systems. Proximity space link protocol. Physical layer".

Its scope clause reads: This standard specifies the general rules, basic functions, and radio frequency settings of the physical layer in the adjacent space link protocol of the spatial data and information transmission system.

Controlled characteristics and performance requirements of communication channels, etc. This standard applies to communications between adjacent spacecraft. It is recommended to be used together with GB/T 39352 and GB/T 39353. Its clauses include terms and definitions.

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Document preview — GB/T 39354-2020

National Standard of the People's Republic of China

ICS: 49.140
Classification: V 75

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviations
5 General
5.1 Information rate agreement
5.2 Adjacent space link model
6 Basic functions of the physical layer
6.1 Overview
6.2 Transmitter
6.3 Receiver
7 Radio frequency equipment
7.1 Overview
7.2 Coherence requirements
8 Communication channel controlled characteristics
8.1 Application background
8.2 UHF frequency
8.3 Other frequency bands
8.4 Polarization requirements
8.5 Modulation requirements
8.6 Adjacent space link rate
9 Performance requirements
9.1 Carrier frequency stability requirements
9.2 Residual AM
9.3 Incoherent carrier phase noise
9.4 Spectral spurs
9.5 Doppler tracking and acquisition requirements
Appendix A (informative appendix) Structural changes of this standard compared with ISO 21460.2015
Appendix B (informative appendix) The technical differences between this standard and ISO 21460.2015 and the reasons

1 Scope

This standard specifies the general rules, basic functions, and radio frequency settings of the physical layer in the adjacent space link protocol of the spatial data and information transmission system.

Controlled characteristics and performance requirements of communication channels, etc.

This standard applies to communications between adjacent spacecraft. It is recommended to be used together with GB/T 39352 and GB/T 39353.

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 article

Pieces. For undated references, the latest version (including all amendments) applies to this document.

GB/T 39352 Space Data and Information Transmission System Adjacent Space Link Protocol Data Link Layer (GB/T 39352-2020,

ISO 22663.2015, MOD)

GB/T 39353 Space Data and Information Transmission System Adjacent Space Link Protocol Synchronization and Coding Sublayer (GB/T 39353-

2020, ISO 21459.2015, MOD)

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Conversation

A conversation between two (or more) adjacent link transceivers.

Note. A complete session includes three typical working phases. session establishment, data service (may include resynchronization, reconnection sub-phases), and session termination.

Session termination can be determined by negotiation (for example, sending no-more-data-to-send command), or when communication is interrupted (cannot resynchronize or reconnect)

The time is determined by the transceiver itself.

3.2 Space link

Communication links between spacecraft and between spacecraft and the ground.

Note. A space link includes one or more one-way or two-way physical channels.

3.3 Adjacent space link

Adjacent link

It is a communication link for direct communication between spacecraft in the distance range of 1m to 100,000km.

Used for the communication link between the main spacecraft and the auxiliary spacecraft.

Note. Short-distance, two-way, fixed or mobile radio frequency links are mainly used to carry out between detectors, landers, patrol devices, orbital constellations, and orbital repeaters.

Communication has the characteristics of small delay, medium signal energy (not weak signal), independent conversation and short time.

3.4 Caller

The initiator of the adjacent space link establishment process and the management subject of the session negotiation process. […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 27 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 22663.2015 · ISO 21459.2015

Cited by

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