Modeling method and modeling device applicable to three-dimensional propagation channels

A technology of propagation channel and modeling method, which is applied in the field of modeling method and device of three-dimensional propagation channel, can solve the problems of not clearly giving the modeling method of pitch angle, lack of understanding and analysis of random characteristics of pitch dimension angle, etc., and achieve change Small, simple to implement, and good modeling effect

Active Publication Date: 2013-09-11
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] However, in the existing standardized 2D and 3D channel models, there is no clear modeling method for ...

Method used

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  • Modeling method and modeling device applicable to three-dimensional propagation channels
  • Modeling method and modeling device applicable to three-dimensional propagation channels
  • Modeling method and modeling device applicable to three-dimensional propagation channels

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Embodiment 1

[0047] like figure 1 As shown, the present embodiment is applicable to a modeling method of a three-dimensional propagation channel, comprising the following steps:

[0048] Step 1: Obtain the direct connection direction between the base station and the mobile communication terminal, and obtain the line-of-sight propagation angle θ according to the height difference and horizontal distance between the base station and mobile communication terminal antennas LoS ; At the same time, the probability of line-of-sight transmission, path loss, time edge extension, horizontal angle extension value, pitch angle extension value and other related large-scale parameters can be obtained according to the actual measurement and calculation method of large-scale parameters, which are used for subsequent modeling;

[0049] Step 2: Construct the central angle θ between the base station end and the mobile communication end respectively by the following formula mean ;

[0050] ...

Embodiment 2

[0060] On the basis of the previous embodiment, this embodiment further proposes a method for determining the offset angle, wherein the offset angle is a fixed value A or by the following formula θ off =F(d,Δh) construction;

[0061] Wherein, the formula F(d, Δh) is a function of dependent variable Δh and d. Its expression form can refer to the following:

[0062] θ off = A a · exp ( b · d 2 + Δ h 2 ) c ...

Embodiment 3

[0067] This implementation is applicable to the modeling method of the three-dimensional propagation channel. On the basis of the above-mentioned embodiments, an optimal method for calculating the central angle is further proposed, as follows:

[0068] When the three-dimensional propagation channel is a non-line-of-sight transmission channel, the step 3 passes the formula Perform zero-mean pitch power angle spectrum translation;

[0069] When the three-dimensional propagation channel is a line-of-sight transmission channel, the step 3 passes the formula Perform zero-mean pitch power angle spectrum translation;

[0070] Among them, θ n is the non-zero mean pitch power angle spectrum, is the zero-mean pitch power angle spectrum, X n The discrete set {-1,1}n that obeys the uniform distribution represents the nth propagation path, and the arrangement order of the multipath components is arranged according to the magnitude of their corresponding power. Therefore, when n=1, t...

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Abstract

The invention discloses a modeling method and a modeling device applicable to three-dimensional propagation channels. The method and the device are designed in order to solve the problem that angles in the vertical direction are neglected in existing three-dimensional propagation channel modeling. The modeling method includes the steps: firstly, acquiring a collineation connection line direction of a base station end and a mobile communication end, and working out a line-of-sight propagation angle theta<LoS> according to height difference and horizontal distance between the base station end and an antenna at the mobile communication end; secondly, respectively constructing central angles theta<mean> of the base station end and the mobile communication end; and thirdly, translating a randomly-generated zero-mean elevation power angle spectrum of a three-dimensional propagation channel onto the central angles so as to obtain zero-mean elevation power angle spectrums of the base station end and the mobile communication end respectively. The method and the device are simple and feasible to implement, high in practicality and capable of making up deficiencies of modeling at elevation angles in the prior art.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a modeling method and device suitable for three-dimensional propagation channels Background technique [0002] In order to improve the utilization rate of the frequency band and increase the coverage of the communication network, the radius of the original cell is further reduced. When the radius of the cell becomes smaller, the pitch angle in the vertical direction between the mobile communication terminal and the base station in the cell becomes larger, but the pitch angle is ignored in the existing communication, especially in the indoor environment. [0003] At the same time, in order to improve the performance of the existing network, beamforming technology and three-dimensional multiple-input multiple-output (3D-MIMO) technology are introduced. The 3D-MIMO technology is realized by dynamically adjusting the weights of the antenna elements in the pitch and hori...

Claims

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Application Information

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IPC IPC(8): H04W16/22H04B7/04
Inventor 张建华裴峰张平潘淳王强
Owner BEIJING UNIV OF POSTS & TELECOMM
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