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Massive MIMO user selection method based on position information

A location information and user technology, applied in the direction of space transmit diversity, radio transmission system, electrical components, etc., can solve the problems that the system capacity cannot be fully reflected, and the selection method is complicated, so as to reduce feedback overhead, save time slot resources, and reduce effect of complexity

Active Publication Date: 2020-09-25
XIDIAN UNIV
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  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art, and propose a Massive MIMO user selection method based on location information, which is used to solve the problem of large feedback overhead and selection of the best user channel matrix in the prior art. The parameters based on the optimal user cannot fully reflect the system capacity and the high complexity of the selection method

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  • Massive MIMO user selection method based on position information
  • Massive MIMO user selection method based on position information
  • Massive MIMO user selection method based on position information

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] refer to figure 1 , to further describe the specific implementation steps of the present invention.

[0030] Step 1, construct user channel matrix according to location information.

[0031] refer to figure 2 , to further describe the application scenarios of the embodiments of the present invention. The Massive MIMO-based multi-user application scenario provided by the embodiment of the present invention includes: multiple users and a base station with a large-scale antenna array. Among them, in the downlink, the base station sends data to multiple users at the same time. Due to problems such as inter-user interference and hardware overhead, the base station cannot serve all users at the same time, and needs to obtain a group of preferred users.

[0032] In the first step, according to the following formula, in the finite scatterer channel model, using the...

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Abstract

The invention discloses a Massive MIMO user selection method based on position information. According to the method, channel matrixes of users are calculated by utilizing position information of a base station and the users, and then geometric angles among the channel matrixes of the users and approximate signal to interference plus noise ratios of the users are calculated. The base station selects an optimal user each time according to the approximate signal to interference plus noise ratio of the user; and reduces a to-be-selected user set according to the geometric angle between a to-be-selected user and the optimal user. According to the user selection method, the correlation and energy of the channel are considered at the same time, the calculation complexity is reduced, the structureis simple, and the processing efficiency is high.

Description

technical field [0001] The present invention relates to the technical field of communication, and further relates to a Massive MIMO user selection method based on location information in the technical field of wireless communication. This method can be used in the application scenario of the Massive MIMO technology where the base station is configured with a large-scale antenna, and realizes user scheduling when the base station serves multiple users at the same time. Background technique [0002] With the advent of the 5G communication era, the Massive MIMO multi-user technology with large-scale antennas at the base station has begun to be widely used due to the data transmission rate and spectral efficiency far higher than traditional communication systems. In this system, a large number of end users coexist and need to serve simultaneously, and the interference between users is aggravated, so it is difficult for the base station to support all users at the same time. Use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0413H04B7/0456H04B7/06
CPCH04B7/0413H04B7/0456H04B7/0626
Inventor 李文刚杨柳颜杨旺方德翔徐雅琴张晨萌
Owner XIDIAN UNIV
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