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A Geometric Stochastic Modeling Method for Unstationary Air-Ground Mimo Channels of UAVs

A stochastic modeling, UAV technology, applied in the field of UAV communication, can solve the problem that the communication channel can no longer be accurately described

Active Publication Date: 2022-07-08
SOUTHEAST UNIV +1
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Problems solved by technology

And in an environment where the distribution of scatterers is relatively concentrated, if only the scatterers on the ground station side are considered, that is, assuming that there is no scattering around the UAV, this type of model will no longer be able to accurately describe the communication channel in the urban environment

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  • A Geometric Stochastic Modeling Method for Unstationary Air-Ground Mimo Channels of UAVs

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[0079] 1. Channel model

[0080] The model proposed by the present invention is as follows figure 1 As shown, the modeling methods include:

[0081] (1) In a single-user communication system with densely distributed scatterers, the UAV is used as the transmitter, the ground station is used as the receiver, and the UAV and the ground station are equipped with multi-antenna arrays, that is, the communication channel is multi-input. Multiple output (Multiple-Input Multiple-Output, MIMO). The drone end is equipped with M T Root antenna with M on the ground station end R root antenna. Without loss of generality, suppose M T =M R = 2.

[0082] (2) The UAV and the ground station are separated by v T and v R moving at a constant speed. v T can be decomposed into a horizontal component v T,xy and a vertical component v T,z . Then you can define T,xy ,v T >=ξ, T,xy ,+x>=γ T , where represents the included angle. Angle pair ξ and γ T Can be used to describe the movemen...

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Abstract

The present invention proposes a geometric random modeling method for a non-stationary air-ground MIMO channel of an unmanned aerial vehicle. The model proposed by this modeling method is a three-dimensional geometric random model. The modeling method includes two cylinder models, which are located on the side of the UAV and the ground station respectively. There is scattering on both the aircraft side and the ground station side. The received signal includes the line-of-sight component, the primary scattering component and the secondary scattering component. Considering the mobility of the UAV and the ground station, the time-varying delay, time-varying angle of arrival and Leaving the angle, a non-stationary channel model is established. This model can establish a reliable and efficient air-ground channel model in the actual communication scenario of UAVs, and provide theoretical support for researchers to design and test UAV communication systems and promote the application of UAVs in all aspects of life.

Description

technical field [0001] The invention relates to the field of unmanned aerial vehicle communication, in particular to a geometric stochastic modeling method of the unsteady air-ground channel of the unmanned aerial vehicle. Background technique [0002] With the progress of aerospace, materials, wireless communication and other related fields, especially the proposal and development of 5G technology, UAVs have been widely used in military and civilian fields, and they play an extremely important role in today's social life. development prospects. [0003] With the wide application of UAVs, people have higher requirements for the channel capacity of UAV communication links. Using MIMO technology can improve the channel capacity of air-ground channels and ensure the reliability of communication. However, there are few existing researches on UAV air-to-ground MIMO channels, and most of them are modeled by deterministic methods. Although the accuracy is high, the modeling proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/391H04B7/0413
CPCH04B17/391H04B7/0413Y02T10/40
Inventor 燕锋周天香李昊丁凯唐琪夏玮玮沈连丰
Owner SOUTHEAST UNIV