Moving target DOA (direction of arrival)-based null broadening 3D-MIMO beamforming method

A beamforming method and 3D-MIMO technology, which is applied in the field of zero-notching extended 3D-MIMO beamforming based on moving target DOA, can solve the problems of misalignment, mismatch, and beamforming performance degradation of interference, etc. Achieve high speed requirements and improve spectral efficiency
CN107181519AActive Publication Date: 2017-09-19BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Publication Date
2017-09-19

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Abstract

The present invention discloses a moving target DOA (direction of arrival)-based null broadening 3D-MIMO beamforming method and belongs to the interference suppression field. The method includes the following steps that: on the basis of existing 3D-MIMO beamforming, an antenna array of M*N array elements is constructed on an xy plane for a base station and a certain mobile terminal which communicates with each other; the weight of each of array factors is calculated; DOA information between a target mobile terminal and the base station as well as between an interference mobile terminal and the base station is determined; the weight of each array factor is re-adjusted according to the DOA information; and constraint is applied to angle regions around a desired direction and an undesired direction, null broadening is performed in the undesired direction, and distortion does not appear in the desired direction. With the method adopted, the problem of the decrease of interference suppression capability in the case of small null width under a user mobile condition can be solved, the robustness of a system is improved, and therefore, the interference of position change can be effectively suppressed, and desired signals can be nearly distortion-free, spectral efficiency is effectively increased, and a requirement for higher rates can be satisfied.
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Description

technical field

[0001] The invention belongs to the field of interference suppression, and in particular relates to a zero trap expansion 3D-MIMO beamforming method based on moving target DOA. Background technique

[0002] According to the "5G Vision and Requirements White Paper", the wide-area coverage scenario supported by 5G will provide users with an experience density of up to 10Mbit / s, and support data traffic density in hotspot areas up to 10Gbit / s experience rate and 10Tbit / km2 data density. However, traditional MIMO antennas are not only small in number and poor in control ability, but also have low performance and focused applications of functions such as spatial multiplexing, spatial diversity, and beamforming, which are also unacceptable for 5G.

[0003] 3D-MIMO technology is one of the key technologies of 5G. On the basis of 2D-MIMO technology, the spatial degree of freedom in the vertical direction is increased, which can improve system capacity, increase spect...

Claims

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