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Adaptive beamforming method for aviation communication

An adaptive beam, aeronautical communication technology, applied in the field of adaptive beam forming, can solve the problem of not using UE location information

Active Publication Date: 2020-09-29
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned common channel beam design method is mainly proposed for the land mobile communication system, and does not use the location information of the UE

Method used

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  • Adaptive beamforming method for aviation communication
  • Adaptive beamforming method for aviation communication
  • Adaptive beamforming method for aviation communication

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Experimental program
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Effect test

Embodiment 1

[0105] Such as figure 1 As shown, the adaptive beamforming method for aviation communication includes the following steps:

[0106] S1: Construct an aeronautical communication system with base stations equipped with multiple antennas, and each cell in the system is sectorized;

[0107] S2: Calculate the beam gain in the sector, and obtain the beam pattern of the ideal common channel beam as the reference beam pattern;

[0108] S3: Construct an optimization model of adaptive beamforming, that is, an optimization model of PBAB;

[0109] S4: Solve the optimization model of PBAB, obtain the beamforming vector, and complete the adaptive beamforming method for aviation communication.

[0110] In the specific implementation process, the adaptive beamforming method for aeronautical communication provided by the present invention has the following advantages: since the serving cell switching usually occurs when the UE is at the edge of the cell, the PBAB scheme can provide the UE in ...

Embodiment 2

[0112] More specifically, on the basis of Embodiment 1, the present invention is specifically as follows: Consider an aeronautical communication system in which a BS is configured with multiple antennas, each cell is sectorized, and the angular interval of the sector is S=[θ min ,θ max ], θ min and θ max represent the minimum and maximum values ​​of the sector angles, respectively. For example, for a 3-sector cell, For a 6-sector cell, In each sector, the BS uses a uniform linear array (Uniform Linear Array, ULA) with M antennas to serve UEs in the sector. Define the normalized antenna spacing as in is the actual antenna spacing, and λ is the carrier wavelength. figure 2 A schematic diagram of the ULA is drawn.

[0113] in the picture Indicates the angle of departure (Angle of Departure, AOD) of the signal. The steering vector of the ULA pointing to the θ direction is:

[0114] v(θ)=[1 e j2πdsinθ e j2π2dsinθ …e j2π(M-1)dsinθ ] T ∈C M (1)

[0115] Defi...

Embodiment 3

[0189] More specifically, in order to more fully illustrate the beneficial effects of the present invention, the effectiveness and advancement of the present invention will be further described below in conjunction with the simulation analysis and results of specific embodiments. We will select the actual number of BS antennas, the number of UE-HO and other parameters, calculate the beamforming vector according to Algorithm 2, and evaluate the performance of the PBAB scheme proposed by the present invention through simulation. The main simulation parameters are given in Table 1.

[0190] Table 1 Simulation parameter table

[0191] Number of BS antennas, M 64 Normalized antenna spacing, d 0.5 Gain adjustment factor, η 0.95 The discretization number of θ, Q 256

[0192] A. Beam pattern

[0193] First, we will demonstrate the applicability of the PBAB scheme proposed in this patent to sectors of different sizes. We consider three sector ranges,...

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Abstract

An adaptive beamforming method for aeronautical communication provided by the invention comprises the following steps: constructing an aeronautical communication system in which a base station is configured with a plurality of antennas, and sectorizing each cell in the system; calculating the beam gain in the sector to obtain an ideal beam pattern of the common channel beam as a reference beam pattern; constructing an optimization model of adaptive beamforming, namely an optimization model of PBAB; and solving the optimization model of the PBAB to obtain a beamforming vector, and completing the adaptive beamforming method for aviation communication. According to the adaptive beamforming method for aeronautical communication provided by the invention, the switching of the serving cell usually occurs when the UE is located at the edge of the cell, so that the PBAB scheme can provide higher beam gain for the UE in a switching state, and the performance of common signal transmission is further improved; the PBAB scheme can be used for sectors with different sizes, and has enough beam gain in each direction within the range of the sectors, so that reliable receiving of common signals bynon-switching UE is ensured.

Description

technical field [0001] The present invention is oriented to the technical field of aeronautical communication, and more specifically, relates to an adaptive beamforming method oriented to aeronautical communication. Background technique [0002] In recent years, with the increase in the number of domestic and foreign flights and the development of UAV technology, aviation communication technology has attracted the attention of academia and industry [1] N.Tadayon, G.Kaddoum and R.Noumeir, "Inflightbroadband connectivity using cellular networks," IEEE Access, vol. 4, pp. 1595-1606, Mar. 2016. In order to improve system capacity, some researchers have proposed to apply beamforming technology to aviation communication [2] E.Dinc, M.Vondra, and C.Cavdar, "Multi-user beamforming and ground stationdeployment for 5G direct air-to- -ground communication,” in Proc. IEEE GLOBECOM, pp.4-8, Dec.2017. Using multiple antennas at the transmitting end for beamforming can improve signal qua...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04W16/28
CPCH04B7/0617H04W16/28
Inventor 赵磊黄颂康江明
Owner SUN YAT SEN UNIV
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