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Self-adaptive communication method and system for links among micro-nano satellite groups

A technology of link self-adaptation and communication method, which is applied in the field of self-adaptive communication method and system between micro-nano constellations, which can solve the problems of inability to dynamically adjust the communication rate, low communication efficiency, data loss, etc., and achieve both reliability and reliability Sexuality, high efficiency and reliability transmission, and the effect of improving transmission efficiency

Active Publication Date: 2021-07-20
HARBIN INST OF TECH AT WEIHAI
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  • Application Information

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Problems solved by technology

[0003] In view of the above problems, the present invention proposes a self-adaptive communication method and system for inter-satellite links of micro-nano constellations to solve the problem of low communication efficiency or data loss caused by the inability to dynamically adjust the communication rate in existing inter-satellite link communication methods question

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  • Self-adaptive communication method and system for links among micro-nano satellite groups
  • Self-adaptive communication method and system for links among micro-nano satellite groups
  • Self-adaptive communication method and system for links among micro-nano satellite groups

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specific Embodiment 1

[0080] figure 2 A flow chart of a micro-nano-satellite inter-satellite link adaptive communication method according to an embodiment of the present invention is shown. Such as figure 2 As shown, the flow of the adaptive communication method is:

[0081] Step 1: It is known that the micro-nano constellation communication system has 8 micro-nano satellites, and the 8 micro-nano satellites in the constellation system need to communicate with each other. In order to ensure reliable communication, the bit error rate of the micro-nano constellation inter-satellite link communication is required 10^(-6);

[0082] Step 2: Through the prior knowledge of communication or a large number of communication experiments in the early stage, obtain the corresponding signal-to-noise ratio threshold when different coding and modulation schemes are lower than the bit error rate threshold 10^(-6), as shown in Table 1, which lists Different coding and modulation schemes can meet the SNR thresho...

specific Embodiment 2

[0115] Given the inter-satellite distance, calculate its spatial attenuation and the threshold of the corresponding communication performance, obtain the signal-to-noise ratio information, combine with the channel knowledge base, optimize and select the optimal coding and modulation scheme in real time, and maintain a reliable connection of the communication link At the same time, maximum data traffic is achieved.

[0116] Evaluate typical communication distance values ​​including {0.01 0.3 0.4 0.5 0.6 0.7 0.8 1 1.1 1.2 1.6 1.8 2 2.4 2.6 2.8 3 3.5 4 4.2 4.5 5 6 7 8 9 10 11 12 13 14 15 16 17 02 18 2 19 2 26 27 28 29 30 31 32 33 34 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190 200 201...} Kilometers for their typical distance values, and Correspond to the effective communication rates corresponding to various coding and modulation schemes, sort them, and optimize and select the best coding and modulation scheme. For the combination of Turbo ...

specific Embodiment 3

[0133] This embodiment proposes a micro-nano-satellite inter-satellite link adaptive communication system, such as Figure 9 As shown, the system includes:

[0134] The channel knowledge base building module 110 is used to obtain multiple signal-to-noise ratio thresholds corresponding to multiple encoding and modulation schemes according to the communication bit error rate of the micro-nano-constellation inter-satellite link less than the communication bit error rate threshold; and according to the multiple signal-to-noise ratio thresholds Establishing an inter-satellite link communication channel knowledge base; wherein, the inter-satellite link communication channel knowledge base establishes multiple sets of correspondence between preset micro-nano-satellite communication distances, coding and modulation schemes, and communication rate values;

[0135] The inter-satellite communication distance acquisition module 120 is used to obtain the communication distance between two ...

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Abstract

The invention discloses a self-adaptive communication method and system for links among micro-nano satellite groups, belongs to the technical field of communication among micro-nano satellite groups, and aims to solve the problem of low communication efficiency or data loss caused by the fact that the communication rate cannot be dynamically adjusted in the conventional inter-satellite link communication method. The method is technically characterized by comprising the following steps of: establishing an inter-satellite link communication channel knowledge base according to an inter-satellite link communication error rate threshold value requirement of a micro-nano satellite group; according to the real-time communication distance between the two micro-nano satellites, selecting the maximum communication rate value as the optimal communication rate value, and selecting the corresponding coding modulation scheme as the optimal coding modulation scheme; and carrying out coding and modulation processing on inter-satellite communication data according to the optimal coding modulation scheme, and carrying out inter-satellite link communication according to the optimal communication rate value. According to the method, high-efficiency and reliable transmission of telemetry data is realized, and the method is of great significance in improving self-adaptive signal processing of inter-satellite links of a micro-nano satellite group system.

Description

technical field [0001] The invention relates to the technical field of micro-nano-satellite inter-satellite communication, in particular to a micro-nano-satellite inter-satellite link adaptive communication method and system. Background technique [0002] During the inter-satellite communication process of the micro-nano constellation, the inter-satellite distance continues to change. If the inter-satellite link communication communicates at a single communication rate, it will cause low communication efficiency or data loss. Then, how to make the inter-satellite communication reliable and effective for different inter-satellite communication distances, so as to realize the reliable high-speed communication of the micro-nano constellation system, is an urgent problem to be studied and solved. Contents of the invention [0003] In view of the above problems, the present invention proposes a self-adaptive communication method and system for inter-satellite links of micro-nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B17/336H04L1/00
CPCH04B7/18521H04B17/336H04L1/0003
Inventor 罗清华焉晓贞周志权王晨旭李琪石雷
Owner HARBIN INST OF TECH AT WEIHAI
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