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System for demodulating downlink data of detector using CCSDS-like (Consultative Committee for Space Data Systems) standard

A technology for downlink data and detectors, applied in the field of downlink data processing of space probes, can solve problems such as the inability to meet the requirements of CE-1 data reception, and achieve the effect of good compatibility and strong compatibility

Active Publication Date: 2013-08-07
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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Problems solved by technology

If the demodulation and processing equipment designed according to the CCSDS standard data format is used in the past, it will obviously not be able to meet the requirements of CE-1 data reception

Method used

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  • System for demodulating downlink data of detector using CCSDS-like (Consultative Committee for Space Data Systems) standard
  • System for demodulating downlink data of detector using CCSDS-like (Consultative Committee for Space Data Systems) standard
  • System for demodulating downlink data of detector using CCSDS-like (Consultative Committee for Space Data Systems) standard

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Embodiment Construction

[0071] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0072] Without loss of generality, it is considered that the downlink data of the detector is amplified and down-converted by the antenna feed, polarizer, and RF front-end, and then sent to the system provided by the present invention for demodulating the downlink data of the detector similar to the CCSDS standard. like figure 1 As shown, the system for demodulating the downlink data of the CCSDS-like detector provided by the present invention is composed of two parts: a demodulator and a CCSDS processor. Among them, the demodulator is used to perform intermediate frequency channel, diversity synthesis, carrier demodulation and code synchronization processing on the two intermediate frequency analog signals received from ...

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Abstract

The invention discloses a system for demodulating downlink data of a detector using a CCSDS-like (Consultative Committee for Space Data Systems) standard. The system comprises a demodulator and a CCSDS processor, wherein, the demodulator respectively carries out intermediate-frequency channel processing, diversity synthesis, carrier demodulation and code synchronization on two intermediate-frequency analog signals received from a front end to obtain serial data I and serial data Q, and transfers the serial data I and the serial data Q and clock signals to the CCSDS processor at the same time;and the CCSDS processor carries out frame synchronization, derandomization, RS (Reed-Solomon) decoding and VCDU (virtual channel data unit) extraction on the serial data I and the serial data Q and the clock signals received from the demodulator, provides decoding quality information, and then saves and distributes the information. Aiming at the special format of the downlink data of the CE-1 detector, the system meets the requirement for receiving the downlink data of the CE-1 detector and combines demodulation on the CCSDS standard data format, thus achieving good compatibility.

Description

technical field [0001] The invention relates to the technical field of downlink data processing of aerospace probes, in particular to a system for demodulating and processing the downlink data of probes similar to the CCSDS standard. Background technique [0002] Founded in 1982, the Consultative Committee for Space Data Systems (CCSDS) is an international standardization organization composed of multinational space organizations. Tasks can be exchanged and processed in a standardized way, so as to more economically and effectively meet the business needs of various users, and also accelerate the development of spatial data systems. [0003] At present, the CCSDS standard has been widely adopted by the international aerospace community, and has become the basic document for the participating countries and institutions to formulate and implement their own application standards. In my country, the CCSDS standard has also been gradually applied to the missions of the Shenzhou s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 苏彦张洪波郑磊李俊铎朱新颖孔德庆李春来
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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