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3d-mimo downlink multi-user scheduling and adaptive transmission method

A 1.3D-MIMO, multi-user scheduling technology, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve problems such as neglect and inaccuracy

Active Publication Date: 2021-05-04
SOUTHEAST UNIV
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Problems solved by technology

For example, in mmWave communication systems, due to the highly directional and quasi-optical properties of mmWave transmission, the direct path will dominate, which makes simple modeling as a Rayleigh fading channel inaccurate
In addition, in actual communication, due to the limitation of user space, the influence of antenna configuration and Doppler effect, the existence of channel correlation array needs to be considered, but the existing research has ignored this

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  • 3d-mimo downlink multi-user scheduling and adaptive transmission method
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  • 3d-mimo downlink multi-user scheduling and adaptive transmission method

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Embodiment Construction

[0044] 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.

[0045] Consider a multi-user downlink. The base station uses a uniform planar antenna array. The antenna array has M rows in the vertical direction and N array elements in each row in the horizontal direction. The distance between adjacent antenna elements is the carrier wavelength in both the horizontal and vertical directions. Half of , there are L users configured with a single receiving antenna, and the base station can serve U users at most at the same time. The base station knows the statistical channel information of user k, where k=1,...,L, the statistical channel information includes: the channel Rice factor of user k channel horizontal line-of-sight co...

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Abstract

The present invention provides a 3D-MIMO downlink multi-user scheduling and adaptive transmission method. The base station adopts a uniform planar antenna array. The method includes the following steps: in the initial state, calculate the horizontal and vertical beamforming index of each user by using statistical channel information; The minimum similarity method is used for multi-user scheduling, and the service user with the smallest similarity is selected to calculate the precoding vector and perform precoding transmission. This method can effectively reduce interference between users, and can obtain higher system throughput with lower computational complexity, can obtain higher sum rate, has high robustness, and is easy to implement; since only statistical information of the channel is required , the amount of channel information required is small, and it is suitable for various typical wireless communication systems; because the influence of channel direct path and correlation matrix is ​​considered at the same time, the channel is more general.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a multi-user downlink system user scheduling and adaptive transmission technology in which a base station is configured with a uniform planar antenna array, and more specifically relates to a similarity-based 3D-MIMO downlink multi-user scheduling and self-adaptive transmission technology. Adapt to the transfer method. Background technique [0002] Massive Multiple-Input Multiple-Output (MIMO), as an effective method to improve network transmission rate and coverage, will become one of the key technologies of the new generation wireless communication network. Compared with the traditional single-user multi-antenna system, large-scale MIMO can make full use of space resources, realize multiple transmission and multiple reception through multiple antennas, and can double the transmission power without increasing spectrum resources and antenna transmission power. Syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0452H04B7/0408H04B7/0456H04B7/06
CPCH04B7/0408H04B7/0452H04B7/0456H04B7/0617
Inventor 李潇孙婷婷高西奇
Owner SOUTHEAST UNIV
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