A low-orbit satellite Internet of Things access method with priority on energy efficiency
A low-orbit satellite and access method technology, applied in the field of satellite communication, can solve problems such as few users, low energy efficiency, and limited coverage of the Internet of Things, and achieve the effect of suppressing interference and high energy efficiency
Active Publication Date: 2022-02-11
ZHEJIANG UNIV
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[0005] The purpose of the present invention is to solve the problems of limited coverage of the Internet of Things, fewer users that can be accommodated by satellite communications, and low energy efficiency in existing beam design schemes, and proposes a low-orbit satellite Internet of Things access method with priority in energy efficiency. And put forward an effective method for the design of the satellite launch beam and the distribution of power
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[0027] The present invention will be further elaborated and illustrated below in conjunction with the accompanying drawings and specific embodiments.
[0028] The system block diagram of the low-orbit satellite Internet of Things access method with energy efficiency priority in the present invention is as follows figure 1 As shown, the satellite has N t One antenna is configured for each user, and users in different beam areas share one beam, so that serial interference cancellation is performed in their respective areas, thereby reducing the complexity of serial interference cancellation. The ground gateway station receives the training sequence from the user to estimate part of the channel state information, and then sends the channel state information to the satellite through the feeder loop. The satellite designs the transmit beam and power for the user signal in each area according to the received channel state information. distribution factor. After receiving the signa...
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The invention discloses a low-orbit satellite internet of things access method with energy efficiency priority. The low-orbit satellite adopts a multi-beam technology with multiple feed sources per beam, which enhances the access capacity of the satellite internet of things. Satellites cover multiple areas, and users within each area share the same beam. The ground gateway station receives the channel state information from the user, and then sends the channel state information to the satellite through a high-capacity feeder circuit. The satellite performs superposition coding on the transmitted signal of each area according to the received channel state information, and then superimposes the coding The final signal is broadcast to each user through the beamforming network. 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 present invention provides an effective wireless access method for the low-orbit satellite internet of things with energy efficiency priority for realizing global seamless connection.
Description
technical field [0001] The invention relates to the field of satellite communication, in particular to a low-orbit satellite Internet of Things access method with priority given to energy efficiency. Background technique [0002] With the application of the Internet of Things in various fields of the economy and society, in some fields of data collection such as large-scale, cross-regional, and harsh environments, due to space and environmental constraints, the terrestrial Internet of Things is helpless, and a mismatch between service capabilities and needs has emerged. The reason is mainly that for the Internet of Things that relies on wireless access, in addition to the Internet of Things terminals, there must also be a communication network composed of enough base stations. However, there are many restrictions on the deployment of base stations on the ground and the communication network connecting base stations: it is impossible to establish base stations in areas such a...
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IPC IPC(8): H04B7/185H04W72/04
CPCH04B7/18513H04W72/046H04W72/0473Y02D30/70
Inventor 郭涔峰陈晓明
Owner ZHEJIANG UNIV