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Massive MIMO user selection method assisted by positioning information

A technology for locating information and users, applied in the field of communication, can solve problems such as high complexity of pilot overhead algorithm, large equivalent dimension between base station and user, and achieve the effect of reducing resource overhead, reducing complexity, and reducing interference

Active Publication Date: 2021-08-17
西安电子科技大学昆山创新研究院
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Most of the existing BDMA user selection schemes are still based on the user's statistical CSI, but with the rapid increase in the number of antennas and users configured in the system, the equivalent dimension between the base station and the user is huge, which will inevitably lead to Frequency overhead and algorithm complexity are too high

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  • Massive MIMO user selection method assisted by positioning information
  • Massive MIMO user selection method assisted by positioning information
  • Massive MIMO user selection method assisted by positioning information

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Embodiment Construction

[0038] The basic idea of ​​the present invention is to consider a 5G micro-cell multi-user Massive MIMO communication system. All users obtain their own positioning information through the positioning system and feed it back to the base station in real time. The positioning system can use Beidou second-generation satellite navigation and positioning system, GPS, wireless positioning system, etc. The base station distinguishes users by collecting their location information, and uses beamforming technology to realize directional transmission for all user communications. The downlink data transmission is mainly considered, and it is assumed that all users are within the line of sight (LOS) path. When a large number of users request services from the base station at the same time, a reasonable user selection algorithm is adopted to select a part of users with the least inter-beam interference for multiplexing transmission. In a MIMO system using large-scale antennas, the number o...

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Abstract

The invention discloses a Massive MIMO user selection method assisted by positioning information. The method uses the positioning information of users and base stations to design a user selection scheme, does not use channel state information, and uses pilot frequency and feedback complex channel correlation matrix in the prior art. Compared with information, it reduces the additional resource overhead, reduces the complexity of calculation, and effectively reduces the delay of information processing. Since the positioning information of each user terminal is unique, the positioning information fed back to the base station by multiple users There will be no interference between them, so compared with the interference among the multi-user feedback information obtained by the base station in the existing method, the method of the present invention reduces the interference between users and improves the capacity of the system. In addition, due to the With the assistance of positioning technology, the algorithm process of the method of the present invention is simple, easy to implement, and applicable to actual Massive MIMO communication systems.

Description

technical field [0001] The invention relates to a Massive MIMO user selection method, in particular to a positioning information-assisted Massive MIMO user selection method, and belongs to the technical field of communication. Background technique [0002] The fifth-generation mobile communication system (5G, also known as IMT-2020) has ultra-high spectral efficiency and transmission rate. As the leading technology of 5G, the Massive MIMO (Massive Multiple-Input Multiple-Output, MIMO) system has adopted a large number of The antenna array can greatly improve the system capacity and energy efficiency, and has received extensive attention from the industry. [0003] In the future 5G system, the coexistence and simultaneous service of a large number of end users will become inevitable, and the distribution of users will be more dense, and the interference between multiple users will increase, which will seriously limit the performance of the system. [0004] A reasonable user ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/06H04J11/00H04W64/00
CPCH04B7/0413H04B7/0617H04J11/0026H04W64/00
Inventor 李文刚朱宏宇刘猛刘欢孙珑心
Owner 西安电子科技大学昆山创新研究院