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3D massive MIMO wide coverage precoding transmission method

A transmission method and large-scale technology, applied in the field of communications, can solve the problems of inter-cell interference in power patterns, and the path loss of user terminals without considering the cell shape, and achieve the effects of suppressing inter-cell interference, flexible search methods, and high power efficiency

Active Publication Date: 2020-12-25
SOUTHEAST UNIV
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Problems solved by technology

However, this scheme does not consider the shape of the cell and the path loss of different user terminals
If the scheme fails to match the shape of the cell coverage, the corresponding power pattern will cause inter-cell interference
In addition, different user terminals have different path losses relative to the base station

Method used

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  • 3D massive MIMO wide coverage precoding transmission method
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  • 3D massive MIMO wide coverage precoding transmission method

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Embodiment Construction

[0042] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0043] The method of the invention is mainly applicable to the 3D massive MIMO system in which the base station side is equipped with a large-scale antenna array to serve multiple users simultaneously. Such as figure 1 As shown, in the 3D massive MIMO wide-coverage precoding transmission method disclosed in the embodiment of the present invention, the first choice is to set the required wide-coverage power pattern according to the height of the base station antenna array, the downtilt angle, and the corresponding transmission angle of the user terminal within the coverage of the cell. The value of the power pattern requiring wide coverage on the sample point is p...

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Abstract

The invention discloses a 3D large-scale MIMO wide-coverage precoding transmission method, which uses precoding to generate a wide-coverage power pattern, and can solve the power coverage problem of 3D large-scale MIMO common signal transmission. The method comprises the following steps: firstly, calculating an angle range covered by a power pattern based on a sphere center projection theory by utilizing information such as antenna array height and a downward inclination angle, and setting a target power pattern; constructing an optimization problem by taking a minimum distance between a powerpattern generated by the precoding matrix and a target pattern as a target and taking the precoding matrix belonging to oblique manifold as a constraint; and solving a pre-coding matrix based on a manifold optimization theory. The coverage angle range of a wide-coverage power pattern generated by the precoding matrix can be freely adjusted. The radiation power pattern generated by the invention can suppress inter-cell interference and can ensure fairness among users at different positions. In addition, the precoding provided by the invention is beneficial to fully utilizing the power amplifier capacity of the base station end so as to obtain high power efficiency.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a 3D massive MIMO wide-coverage precoding transmission method. Background technique [0002] In order to improve user experience and cope with the challenges brought about by the rapid growth of wireless data service demands and new service demands, the next-generation mobile network in the future needs to support scenarios such as high quality, high transmission rate, high mobility, high user density, and low latency. The Massive Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) technology, which greatly improves the system capacity by installing a large-scale antenna array in the base station, is one of the key technologies for the future generation of wireless networks, and it is also a research topic in recent years. hotspot. [0003] One of the challenges of massive MIMO is designing the signal transmission process for common channels. Unlike dedica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04J11/00
CPCH04B7/0456H04J11/0053Y02D30/70
Inventor 高西奇郭伟然卢安安
Owner SOUTHEAST UNIV
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