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Method for calculating interruption probability of MIMO (Multiple Input Multiple Output) relay channel for unmanned aerial vehicle (UAV) communication

A technology of relay channel and probability calculation, applied in radio transmission system, transmission monitoring, electrical components, etc.

Active Publication Date: 2017-01-25
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

In addition to the above-mentioned disadvantages, the pdf of the eigenvalues ​​of different channel models (such as Gaussian channel and Rice channel) will be very different, so different channel models will have different outage probability calculation methods , therefore, a unified method cannot be used to find outage probabilities of different channel models

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  • Method for calculating interruption probability of MIMO (Multiple Input Multiple Output) relay channel for unmanned aerial vehicle (UAV) communication
  • Method for calculating interruption probability of MIMO (Multiple Input Multiple Output) relay channel for unmanned aerial vehicle (UAV) communication
  • Method for calculating interruption probability of MIMO (Multiple Input Multiple Output) relay channel for unmanned aerial vehicle (UAV) communication

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[0034] specific implementation plan

[0035] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0036] Traditional analysis of UAV relay systems, either by establishing figure 1 single-link model shown, either with an attached figure 2 Single drone relay model shown. attached figure 1 The shortcoming of the medium model is that it does not consider the height difference between the ground station and the UAV, which does not match the actual UAV relay system; figure 2 The disadvantage of the medium model is that there is only one UAV between the source node S and the destination node D. When the UAV communication radius is small and the distance between the source node S and the destination node D is large, one UAV usually cannot meet the communication requirements. . For the above problems, the model built by the present invention is as attached image 3 , this model not only consi...

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Abstract

The invention discloses a complete UAV (unmanned aerial vehicle) relay model which comprises two types of links, wherein one type of the links is a ground-air link from a ground station to a UAV, and a channel under the link is regarded as a Rician channel; and the other type of the links is an air-air link from a UAV to a UAV, and a channel under the link is regarded as a Rayleigh channel. Although the analysis is complicated, the relay model and a channel model can well conform to actual situations. Based on the channel model, the invention also provides a method for solving the interruption probability, and the method cannot be influenced by the channel model and is suitable for any channel model with a precondition that a channel matrix of the channel model must be known. By virtue of MATLAB (matrix laboratory) simulation, a curve of characteristic values of a channel matrix H can be obtained, then by virtue of curve fitting, a mathematical expression of the characteristic values can be obtained, and then a cumulative distribution function of the characteristic values is obtained, which is much simpler. By use of the method provided by the invention, the overall interruption probability of the two sections of the links is obtained, and the interruption probability under an actual situation is well reflected.

Description

technical field [0001] The invention relates to the technical field of unmanned aerial vehicle relay communication, in particular to a method for calculating the interruption probability of a MIMO relay channel for unmanned aerial vehicle communication. Background technique [0002] Applying MIMO technology to the UAV communication system can greatly improve the communication quality, especially for UAVs used in desert search and rescue, or battlefield surveys, etc. UAVs need to transmit a large number of videos and pictures in real time. There are high requirements on channel capacity and transmission rate. At present, the existing channel models mainly include Rice channel, Rayleigh channel, Gaussian channel, and Nakagami-m channel. For the convenience of analysis, the existing methods basically introduce the above channel models into UAV communication. In the system, the UAV Rice channel, the UAV Rayleigh channel and the UAV Gaussian channel are formed. [0003] The spe...

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Application Information

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IPC IPC(8): H04B7/0413H04B7/185H04B17/391
CPCH04B7/0413H04B7/18504H04B7/18506H04B17/391
Inventor 杨志华邵红宇金豪杰杨忆
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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