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Method for designing three-dimensional beam forming in multi-user 3D-MIMO system

A 3D-MIMO and three-dimensional beam technology, applied in the field of three-dimensional beamforming design in multi-user 3D-MIMO systems, can solve problems such as ignoring three-dimensional distribution characteristics, and achieve the effect of improving overall performance

Inactive Publication Date: 2015-01-28
XI AN JIAOTONG UNIV
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Problems solved by technology

However, most of the previous studies have studied 3D beamforming under the traditional 2D channel model, and the antenna model used is only the antenna pattern and the antenna port has been fixed, rather than the planar antenna array composed of the actual active antenna system.
Ignoring the three-dimensional distribution characteristics of users in space, the effect of improving system throughput by only adjusting the downtilt angle of base station antennas is not ideal in three-dimensional scenes

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  • Method for designing three-dimensional beam forming in multi-user 3D-MIMO system
  • Method for designing three-dimensional beam forming in multi-user 3D-MIMO system
  • Method for designing three-dimensional beam forming in multi-user 3D-MIMO system

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[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0044] figure 1 where represents the planar antenna array used by the base station, the specific description is as follows:

[0045] The two-dimensional antenna planar array used by the base station is composed of antenna elements arranged in M ​​rows and N columns, and the distances between rows and columns are d H and d V . Each antenna element is powered independently by a transmitter whose amplitude and phase can be adjusted independently. In LTE, radio resources are allocated in units of antenna ports, and each antenna port is composed of several physical antenna elements, and these elements carry the same information. Different from traditional channels such as WINNER, in the new 3D system model protocol, the pattern of antenna elements instead of antenna ports is given by the protocol. The antenna element pattern is divided into horizontal a...

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Abstract

The invention discloses a method for designing three-dimensional beam forming in a multi-user 3D-MIMO system. The method comprises the following steps that first, the probability density function of the vertex angles from a base station to user direct vision diameters is calculated according to a distribution model of users in a 3D scene, and a multi-user scheduling algorithm in the multi-user 3D-MIMO system is designed according to the probability density function of the vertex angles; second, when the base station sends signals to the users, each antenna port in a configured planar antenna array serves one individual user, precodes applied to all the antenna ports are precodes suggested in the 3GPP standard, and the served users are selected from all the users through the multi-user scheduling algorithm; third, configuration of the planar antenna array of the base station is decided by the designed multi-user scheduling algorithm, an electronic downward inclination angle used in each precode applied to the corresponding antenna port is decided by the adopted configuration of the planar antenna array, and the throughput of the system is maximized finally. The method greatly improves the overall performance of the 3D-MIMO system.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a three-dimensional beamforming design method in a multi-user 3D-MIMO system. Background technique [0002] In recent years, the amount of data required by smart mobile devices is far greater than before, so 3GPP (3rd Generation Partnership Project) is committed to researching cutting-edge technologies in its standards to improve spectrum efficiency and user experience. Three dimensional Multiple-Input Multiple-Output (3D-MIMO) is one of the key technologies currently being researched by 3GPP in the next generation Long Term Evolution (LTE) wireless communication system. Compared with other technologies, 3D-MIMO does not require large-capacity backhaul links and more spectrum resources. It uses a large number of antennas arranged in a spatial antenna array for three-dimensional beamforming signal transmission, which greatly improves system performance. . Howeve...

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Application Information

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IPC IPC(8): H04B7/04H04B7/06H04B17/391
CPCH04B7/04H04B7/0617H04B7/0452
Inventor 任品毅张逸炎孙黎
Owner XI AN JIAOTONG UNIV
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