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SCMA codebook scheduling method based on beam domain channel

A scheduling method and beam domain technology, applied in channel estimation, wireless communication, baseband system components, etc., can solve problems such as limited number of codewords, interference between users, inability to support large-scale user access, etc., and achieve simplified reception , Improve system capacity and reduce interference between users

Active Publication Date: 2020-10-27
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

Since the number of codewords in the SCMA codebook is determined by the dimension of the extended matrix and the column weight of the extended matrix, the number of codewords in a system is limited
With the increase of the number of system access users, the existing SCMA codebook cannot support large-scale user access
Codeword multiplexing caused by too many access users will cause serious inter-user interference

Method used

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  • SCMA codebook scheduling method based on beam domain channel
  • SCMA codebook scheduling method based on beam domain channel
  • SCMA codebook scheduling method based on beam domain channel

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Embodiment Construction

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings and specific embodiments.

[0045] like figure 1 As shown, the SCMA codebook scheduling method based on the beam domain channel disclosed in the embodiment of the present invention mainly includes the following steps:

[0046] (1) The base station pre-generates a set of SCMA codebooks adapted to the number of different access users according to the number of resource blocks allocated for each user; when the SCMA codebook is determined, the SCMA codebooks used by different groups of users are also determined accordingly. When a large-scale uniform linear array is configured on the base station side, and the distance between antenna elements is on the order of half a wavelength, the unitary transformation matrix that transforms the channel in t...

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Abstract

The invention provides a sparse code multiple access (SCMA) codebook scheduling method based on a beam domain channel. In the method, a base station pre-generates a group of SCMA codebooks adapting todifferent numbers of accessed users according to the number of resource blocks allocated to each user, and groups the users by considering the correlation of beam domain channels among different users, divides the users with strong correlation of the beam domain channels into the same group, and schedules the codebooks for the users by utilizing the sparse characteristic of the beam domain channels so as to reduce the interference of the users among the groups. According to the method, the codebook scheduling problem when the number of system access users is far greater than the number of system codewords is solved, and the system performance is improved on the premise of lower implementation complexity.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a sparse code multiple access codebook scheduling method based on a beam domain channel under a massive MIMO system. Background technique [0002] In recent years, with the continuous development of mobile Internet and Internet of Things application requirements, the demand for wireless communication speed and the number of terminal connections have shown a blowout growth. In order to meet the development needs of future wireless communication systems such as higher data transmission rate, larger system capacity, and higher spectral efficiency, and to realize the needs of different application scenarios of future wireless networks, academia and industry have launched new technologies that are highly efficient and achievable. Long-term research and exploration, including large-scale multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) technology and non-ortho...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/08H04L25/02H04W72/54
CPCH04W72/0466H04L25/0202H04W72/541H04W72/542
Inventor 王闻今陈玲鹏杨长蓉方家琪尤力高西奇
Owner SOUTHEAST UNIV