Satellite-ground combined space-ground integrated large-scale access method
An access method and large-scale technology, applied in radio transmission systems, electrical components, transmission systems, etc., to solve problems such as limited coverage of terrestrial communication networks
Active Publication Date: 2021-02-05
ZHEJIANG UNIV
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[0006] The purpose of the present invention is to solve the problem of limited coverage of the ground communication network in the prior art, and design a kind of space-ground integrated network to provide an efficient access method for future wireless communication, and then propose a satellite-ground combination Space-ground integration large-scale access method
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[0050]The present invention will be further elaborated and illustrated below in conjunction with the drawings and specific embodiments. The technical features of the various embodiments of the present invention can be combined accordingly without conflict with each other.
[0051]The system block diagram of a space-ground integrated large-scale access method proposed by the present invention is as followsfigure 1 As shown, the satellite has Ksat Antenna, ground base station has KBS One antenna, each satellite user and base station user are equipped with one antenna. Users in different beam regions share one beam, so that serial interference cancellation is performed within their respective regions, thereby reducing the complexity of serial interference cancellation. The satellite earth station receives the training sequence from the user to estimate part of the channel state information, and the base station estimates part of the channel state information through the long-term channel ...
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The invention discloses a satellite-ground combined space-ground integrated large-scale access method, and relates to the field of wireless communication. A low-orbit satellite and a ground base station adopt a multi-beam technology at the same time, and the overall system capacity is increased. The satellite covers a plurality of areas, satellite users in each area share the same beam, a base station may exist in each area, the base station users are divided into a plurality of clusters according to the orientation, and each cluster shares one beam. The satellite and the base station obtain channel state information of respective users by using channel estimation, then carry out superposition coding on a transmitting signal of each wave beam according to the channel information, and finally transmit the signals after superposition coding through a wave beam forming network. After receiving the signals, the users firstly decode the user signals with weaker channel gain in the beam area, remove the signals of the users, and finally decode the own signals. The invention provides an effective wireless access method for realizing a space-ground integrated large-scale information network.
Description
Technical field[0001]The present invention relates to the field of wireless communication, in particular to a space-ground integrated large-scale access method of satellite-ground integration.Background technique[0002]The past few decades have witnessed a surge in demand in the communications industry and the rise of new applications. A large number of technological innovations and theoretical breakthroughs have built generations of reliable wireless communication networks. This year, the fifth-generation (5G) communication network has been gradually implemented. Compared with the fourth-generation (4G) long-term evolution advanced (LTEA) system, the fifth-generation (5G) network has massive device connection capabilities and higher service flow capabilities. And customized user service experience. However, although decades of development have produced a wealth of technologies to enhance terrestrial networks, there are still some challenges that terrestrial networks cannot solve, su...
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Login to View More IPC IPC(8): H04B7/185
CPCH04B7/1851H04B7/18519H04B7/18558
Inventor 褚建杭陈晓明
Owner ZHEJIANG UNIV