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Three-dimensional Massive MIMO channel modelling method based on random scattering cluster

A channel modeling and three-dimensional technology, applied in transmission monitoring, radio transmission systems, electrical components, etc., can solve problems such as the inability to accurately describe the 3D scattering propagation environment, the lack of consideration of near-field effects, and the complexity of spherical wave calculations

Active Publication Date: 2018-08-03
HARBIN ENG UNIV
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Problems solved by technology

The existing two types of modeling methods have shortcomings: the modeling method based on the birth and death process needs to model the appearance and disappearance of scattering clusters at the same time, and each channel update needs to traverse the entire array axis antenna to determine the value of each antenna. Scattering clusters of array elements, and spherical wavefront calculation is also relatively complex, so the overall complexity is relatively high; while the channel model based on the visible area of ​​scattering clusters only considers the definition of the visible area on the 2D plane, and cannot accurately describe the 3D scattering propagation environment, and the near-field effect is not considered in the model

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  • Three-dimensional Massive MIMO channel modelling method based on random scattering cluster
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  • Three-dimensional Massive MIMO channel modelling method based on random scattering cluster

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Embodiment Construction

[0068] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0069] A three-dimensional Massive MIMO channel modeling method based on random scattering clusters, comprising the following steps:

[0070] Step 1: Taking the center of the large-scale antenna array of the base station as the origin, establish a 3D coordinate system, in which each parameter is defined as follows: the distances from the base station and the mobile station to the scattering cluster n are respectively and The pitch departure angle and azimuth departure angle from the base station to the scattering cluster n are θ n,ZOD and φ n,AOD ; The pitch departure angle and azimuth departure angle of the scattering sub-path m in the base station through the scattering cluster n are respectively θ n,m,ZOD and φ n,m,AOD ; The pitch arrival angle and azimuth arrival angle of the scattering cluster n to the mobile terminal are θ n,ZOA and φ...

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Abstract

The invention discloses a three-dimensional Massive MIMO channel modelling method based on a random scattering cluster, and belongs to the technical field of the wireless communication. Second-order approximation of spherical wave-front is imported into a 3D Massive MIMO channel model due to the computing complexity of the spherical wave-front, namely, parabolic wave-front modelling near field effect, the theoretical and computing complexity are reduced in comparison with the spherical wave-front; a scattering cluster distribution situation in the 3D space is used as a research object for thenon-stable feature presented by the Massive MIMO channel, and a relatively simple modelling method based on scattering cluster space location information is provided by importing two physical conceptions of effective probability of the scattering cluster and the effective scattering cluster, and the propagation feature of the 3D scattering environment is simply and flexibly described by modeling the appearance and disappearance of the effective scattering cluster in an array axis by using the random process. Compared with the operation of directly applying the spherical wave-front, the theoretical and computing complexity are reduced, and a method with low computing complexity is provided for modelling channel near field effect.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a three-dimensional Massive MIMO channel modeling method based on random scattering clusters. Background technique [0002] Multiple-Input-Multiple-Output (MIMO: Multiple-Input-Multiple-Output) technology is of great significance in improving spectrum efficiency and system capacity of wireless communication systems. With the rapid popularization of high-end smart mobile terminals and the increasing number of mobile users, the demand for data transmission rates in future communications will increase exponentially. As a new generation of enhanced MIMO technology, Massive MIMO increases by more than an order of magnitude compared with the 4 (or 8) antenna configuration in the traditional MIMO system. Theoretically, the more antennas there are, the higher the spectral efficiency and transmission reliability of the system will be. Massive MIMO technology c...

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Application Information

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IPC IPC(8): H04B17/391H04B7/0413
CPCH04B7/0413H04B17/391H04B17/3912
Inventor 张薇段京京沃文杰陈敬尧窦峥
Owner HARBIN ENG UNIV
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