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Satellite relay method utilizing time labels to achieve multi-target user support

A multi-target user and time-tagging technology, applied in climate sustainability, sustainable communication technology, radio transmission system, etc., can solve the limitation of satellite relay rate, frequency division multiple access method can not effectively alleviate the resource shortage of relay terminals and other issues to achieve the effect of simplifying hardware requirements, reducing the number of terminals on the star, and saving the number of channels

Active Publication Date: 2015-01-21
SHANGHAI SATELLITE ENG INST
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing relay methods supporting multi-target users are code division multiple access methods, which limit the satellite relay rate
At the same time, the time division multiple access method also has this problem, and the frequency division multiple access method cannot effectively alleviate the problem of resource shortage of relay terminals

Method used

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  • Satellite relay method utilizing time labels to achieve multi-target user support
  • Satellite relay method utilizing time labels to achieve multi-target user support

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Embodiment 1

[0030] In order to make the embodiment of the present invention more readable, the number of target users in this embodiment is defined as 2, the amount of data that the target user needs to transmit is 10 bits, and the time tag is 10101010, totaling 8 bits.

[0031] A satellite relay method using time tags to achieve multi-target user support, specifically including the following steps:

[0032] Step 1: Two target users (target user A and target user B) add the 10 bits of data that each need to be relayed to the header of the time tag: 10101010, a total of 8 bits of data, control the sending time of the two target users, so that After the satellites sequentially staggered 1 / 2 bit cycle time to receive 2 channels of data;

[0033] Among them, 2 channels of 10-bit data are: R A :1101011100 (data sent by target user A to the relay satellite), R B :1011101101 (data sent by target user B to the relay satellite)

[0034] Step 2: The relay satellite directly receives the superimposed 2 elec...

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Abstract

The invention provides a satellite relay method utilizing time labels to achieve multi-target user support. The satellite relay method comprises the steps that (1) N target users add the K-bit time labels into the respective L-bit relay data heads to be transmitted, and the N target users are controlled to sequentially stagger (1 / N)-bit cycle time to sequentially transmit data; (2) a relay satellite receives N electromagnetic wave superimposed signals and forwards the N electromagnetic wave superimposed signals to a ground station; (3) the receiving end of the ground station performs judgment demodulation according to the detection judgment cycle of a (1 / N)-bit cycle, so that (N*L+N*K+N-1)-bit data are obtained through demodulation; (4) according to prior information of the time labels, N channels of data are sequentially figured out based on dislocation subtraction; (5) the data figured out is subjected to N-channel parallel conversion and is output, and then the data transmitted by the N target users respectively are restored. According to the satellite relay method, relay satellite resources are utilized in an optimized mode; besides, the satellite relay method has the advantages that hardware requirements are simplified, the number of terminals is reduced, system weight is reduced, and power consumption is lowered.

Description

Technical field [0001] The invention relates to a satellite relay system in the field of aerospace technology, in particular to a satellite relay method that uses time tags to realize multi-target user support. Background technique [0002] The relay satellite system is a system that provides data relay, continuous tracking and orbital measurement and control services between spacecraft and spacecraft in low orbit or between spacecraft and ground stations. [0003] With the continuous development of technologies such as earth observation, military reconnaissance, and deep space exploration in the aerospace field, relay satellite data transmission has shown the characteristics of large-capacity, high-speed and diversified relay tasks, and on-board relay resources have become Especially precious, how to efficiently use the on-board relay resources to serve more target users with limited terminal configuration has become an urgent problem to be solved. [0004] The existing relay metho...

Claims

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Application Information

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IPC IPC(8): H04B7/185
CPCH04B7/18515H04B7/18528H04B7/18534Y02D30/70
Inventor 陈荷许域菲
Owner SHANGHAI SATELLITE ENG INST
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