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A large-scale access method based on low-orbit multi-beam satellites

An access method and multi-beam technology, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve the problems of limited coverage of the Internet of Things and fewer satellite communication users, and achieve interference suppression and high spectrum efficiency , to achieve the effect of low complexity

Active Publication Date: 2021-02-26
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of limited Internet of Things coverage and fewer users that satellite communications can accommodate in the above-mentioned solutions, and proposes a large-scale access method based on low-orbit multi-beam satellites

Method used

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  • A large-scale access method based on low-orbit multi-beam satellites
  • A large-scale access method based on low-orbit multi-beam satellites
  • A large-scale access method based on low-orbit multi-beam satellites

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Embodiment Construction

[0029] The system block diagram based on low-orbit multi-beam satellite large-scale access is as follows: figure 1 As shown, the satellite has N t One antenna is configured for each user. Users in different beam areas share one beam, so that serial interference cancellation is performed within their respective areas, thereby reducing the complexity of serial interference cancellation. Satellite earth stations receive training sequences from users to estimate part of the channel state information, and design robust transmit beams for user signals in each area based on part of the channel state information. After receiving the signal, the user performs serial interference cancellation on the signal in the area to further reduce interference and improve system performance.

[0030] A large-scale access method based on low-orbit multi-beam satellites in the present invention, the steps are as follows:

[0031] 1) All users naturally belong to different M satellite beam coverage...

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Abstract

The invention discloses a large-scale access method based on low-orbit multi-beam satellites. The satellite adopts multi-beam technology with multiple feed sources per beam, which increases the capacity of the satellite communication system. Satellites cover multiple areas, and users within each area share the same beam. The gateway station sends the collected channel information to the satellite through the feeder loop. The satellite then superimposes and encodes the transmitted signals in each area according to the received channel information, and then transmits the superimposed and encoded signal through the beamforming network. Thereby reducing inter-beam interference. After receiving the signal, the user first decodes the signals of users with weak channel gain in the area, removes the signals of these users, and finally decodes its own signal. The invention provides an effective wireless access method for realizing the large-scale internet of things with global seamless connection.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a large-scale access method based on low-orbit multi-beam satellites. Background technique [0002] In recent years, the Internet has driven the rapid development of the Internet of Things, and is changing all walks of life around the world, such as smart medical care, smart agriculture, manufacturing and industry, and so on. Traditional Internet of Things technologies such as WiFi, NB-IoT and LoRa access technologies are only sufficient to meet the communication needs in cities and some ordinary workplaces. However, due to some extreme geographical environments and economic cost considerations, it is difficult to establish traditional IoT networks in places such as oceans and mountains. In this case, the satellite Internet of Things is considered to be an effective technology that can compensate for the terrestrial Internet of Things, and the multi-beam technology on the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0408H04B7/06H04B7/185
CPCH04B7/0408H04B7/0626H04B7/1851H04B7/18539
Inventor 褚建杭陈晓明
Owner ZHEJIANG UNIV