WO2012129850A1 - Procédé de reconstruction d'un champ de mode extérieur de canaux d'une antenne multi-entrée multi-sortie - Google Patents

Procédé de reconstruction d'un champ de mode extérieur de canaux d'une antenne multi-entrée multi-sortie Download PDF

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Publication number
WO2012129850A1
WO2012129850A1 PCT/CN2011/075996 CN2011075996W WO2012129850A1 WO 2012129850 A1 WO2012129850 A1 WO 2012129850A1 CN 2011075996 W CN2011075996 W CN 2011075996W WO 2012129850 A1 WO2012129850 A1 WO 2012129850A1
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WO
WIPO (PCT)
Prior art keywords
mode field
excitation point
spherical
wave function
mimo antenna
Prior art date
Application number
PCT/CN2011/075996
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English (en)
Chinese (zh)
Inventor
彭宏利
黄旭
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201110078871.1A external-priority patent/CN102723973B/zh
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012129850A1 publication Critical patent/WO2012129850A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/10—Radiation diagrams of antennas
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/391—Modelling the propagation channel
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/10—Numerical modelling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems

Definitions

  • the present invention relates to a multiple input multiple output (MIMO) antenna technology, and more particularly to a MIMO antenna channel out-of-field mode field reconstruction method and apparatus.
  • MIMO multiple input multiple output
  • the spatial channel models used by the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) and Winner (Wireless World Initiative New Radio) are SCM ( Spatial Channel Model ) and SCME ( Spatial Channel Model Extenion ), respectively.
  • the parameters are obtained by statistically processing the transmission at both ends of the transceiver and its near-field scattered signal.
  • this statistical processing method can theoretically support antenna elements and arrays of arbitrary topologies, due to the diversity of antenna channels and the complexity of interaction between antennas and near-field environments, transmission based on both ends of transmission and reception and its near field
  • the SCM and SCME channel models obtained by the scatter signal statistics cannot accurately reflect the characteristics of the antenna and its near-field channel.
  • the main object of the present invention is to provide a method and apparatus for OFDM antenna out-of-channel mode field reconstruction, which can accurately and quickly determine the radiated electromagnetic field information of the MIMO antenna out-of-plane space.
  • the present invention provides a method for OFDM antenna out-of-channel mode field reconstruction, the method comprising: determining a spherical surface surrounding a MIMO antenna and a terminal to be tested, acquiring a number of truncated terms of a spherical vector wave function of the determined spherical surface, and in the spherical surface An excitation point source is placed on the mesh point of the segmentation;
  • the spherical vector wave function mode fields of all excitation point sources are superimposed to construct an equivalent mode field of the excitation point source array
  • the equivalent mode field is reconstructed by matching the radiation field of the actual MIMO antenna with the equivalent mode field.
  • the determining a spherical surface surrounding the MIMO antenna and the terminal to be tested is: determining that the spherical surface surrounding the MIMO antenna and the terminal to be tested is a spherical surface with a radius of R; wherein, R ⁇ max(D 2 / A, 3D, 10A ), D is the minimum spherical diameter surrounding the MIMO antenna and the terminal to be tested, and ⁇ is the wavelength at which the MIMO antenna radiates electromagnetic waves.
  • the source of the excitation point is placed on the spherical mesh point of the spherical surface: the spherical surface is divided into a uniform spherical mesh, and three vertical vertical positions are placed at each mesh dot position.
  • the three electrical fundamental oscillators and the three magnetic fundamental oscillators form a source of excitation points.
  • the ball vector wave function mode field of all excitation point sources is superimposed by using the number of truncation items, and an equivalent mode field of the excitation point source array is constructed, which is: combining the spherical vector wave function translation transformation theory, and using the ball
  • the vector wave function expands the required number of truncated items N, and the electric and magnetic radiation fields of the excitation point source are equivalently transformed from the grid local Cartesian coordinate system to the mode field of the global Cartesian coordinate system, then the ball vector of the i-th excitation point source
  • the wave function mode field is: ( ) + ' y A f + « z + , ' z A , f)F j (F)
  • the electrical fundamental oscillator and the magnetic fundamental oscillator are equivalently transformed from the grid local Cartesian coordinate system to the translation and rotation transformation matrix of the global Cartesian coordinate system;
  • the equivalent mode field is reconstructed by matching the radiation field of the actual MIMO antenna with the equivalent mode field, and the radiation field ( ) of the actual MIMO antenna and the equivalent mode field m are : d ( ) is matched to obtain the reconstruction mode field expansion coefficient model Q; according to the reconstruction mode field expansion coefficient model Q, the amplitude X of all excitation point sources is obtained; and the equivalent mode field is reconstructed according to the amplitude X of all excitation point sources. d ( ).
  • the invention provides a device for reconstructing a MIMO antenna out-of-channel mode field, the device comprising: a spherical surface determining module, a truncated item number acquiring module, an excitation point source placing module, an equivalent mode field building module, and a reconstructed equivalent mode field module; among them,
  • a spherical determining module configured to determine a spherical surface surrounding the MIMO antenna and the terminal to be tested
  • a truncating item obtaining module configured to obtain a number of truncated items of a spherical vector wave function of the spherical surface determined by the spherical determining module
  • An excitation point source placement module configured to place an excitation point source on a mesh point of the spherical surface determined by the spherical determination module;
  • An equivalent mode field construction module is configured to superimpose a ball vector wave function mode field of all excitation point sources by using a number of truncated items to construct an equivalent mode field of the excitation point source array;
  • the reconstructed equivalent mode field module is used to reconstruct the equivalent mode field by matching the radiation field of the actual MIMO antenna with the equivalent mode field.
  • the spherical determining module is specifically configured to determine that the spherical surface surrounding the MIMO antenna and the terminal to be tested is a spherical surface with a radius of R; wherein, R ⁇ max(D 2 1 A, 3D, ⁇ ), D is The minimum spherical diameter surrounding the MIMO antenna and the terminal to be tested, and ⁇ is the wavelength at which the ⁇ antenna radiates electromagnetic waves.
  • the excitation point source placement module is specifically configured to divide the spherical surface determined by the spherical surface determining module into a uniform hook spherical surface grid, and place three mutually perpendicular electric basic vibrators at each of the obtained mesh dot positions.
  • the equivalent mode field construction module is specifically used to combine the spherical vector wave function translation transformation theory, and uses the spherical vector wave function to expand the required number of truncated items N, and the electric and magnetic radiation fields of the excitation point source are
  • the net pattern domain Cartesian coordinate system is equivalently transformed to the mode field of the global Cartesian coordinate system, then the spherical vector wave function mode field of the i-th excitation point source is: ( ) + ' y A f + « z + , ' z A , f) F j (F)
  • L is the number of excitation point sources
  • the reconstructed equivalent mode field module is specifically used to compare the radiation field ( ) of the actual MIMO antenna with the equivalent mode field.
  • d ( ) is matched to obtain the reconstruction mode field expansion coefficient model
  • the present invention provides a method and apparatus for OFDM antenna out-of-channel mode field reconstruction, determining a spherical surface surrounding a MIMO antenna and a terminal to be tested (DUT), and acquiring a number of truncated items of a spherical vector wave function of the determined spherical surface, and The excitation point source is placed on the spherical mesh point of the spherical surface; the spherical vector wave function mode field of all the excitation point sources is superimposed by using the number of truncated items, and the equivalent mode field of the excitation point source array is constructed; by using the actual MIMO antenna The radiation field is matched with the equivalent mode field to reconstruct the equivalent mode field; thus, the radiation electromagnetic field information of the outer space of the MIMO antenna can
  • FIG. 1 is a schematic flow chart of a method for implementing a MIMO antenna out-of-channel mode field reconstruction according to the present invention
  • FIG. 2 is a schematic structural diagram of an apparatus for implementing a MIMO antenna out-of-channel mode field reconstruction according to the present invention. detailed description
  • the basic idea of the present invention is: determining a spherical surface surrounding the MIMO antenna and the terminal to be tested, acquiring a number of truncated terms of the spherical vector wave function of the determined spherical surface, and placing the excitation point source on the spherical mesh point of the spherically divided mesh; Using the number of truncated terms, the spherical vector wave function mode fields of all excitation point sources are superimposed to construct the equivalent mode field of the excitation point source array. The equivalent mode is reconstructed by matching the radiation field of the actual MIMO antenna with the equivalent mode field. field.
  • the present invention implements a method for OFDM antenna out-of-channel mode field reconstruction. As shown in FIG. 1, the method includes the following steps:
  • Step 101 Determine a spherical surface surrounding the MIMO antenna and the terminal to be tested.
  • R should satisfy the formula (1):
  • the spherical surface surrounding the MIMO antenna and the terminal to be tested is a spherical surface having a radius of R.
  • Step 102 Acquire a number N of truncation items required for expansion of a spherical vector wave function of the determined spherical surface. Specifically, determine the number of truncated items N and N required for expansion of the spherical vector wave function according to R in the formula (1). Shown
  • Step 103 placing an excitation point source on the spherical mesh point segmented by the spherical surface
  • the excitation point source is composed of three mutually perpendicular electric fundamental oscillators and three mutually perpendicular
  • the magnetic fundamental oscillator is configured, and the current and the magnetic current direction of the electric basic vibrator and the magnetic basic vibrator are consistent with the coordinate axis direction of the grid local rectangular coordinate system;
  • the spherical surface is divided into a uniform spherical mesh, and three mutually perpendicular electrical fundamental oscillators and three mutually perpendicular magnetic fundamental oscillators are placed at the position of each mesh dot obtained, and the electrical fundamental oscillator and The current and magnetic current directions of the magnetic fundamental oscillator respectively correspond to the x, y, and z coordinate axes of the grid local rectangular coordinate system.
  • the above six basic oscillators constitute an excitation point source, and the amplitude of the first excitation point source can be expressed as ⁇ ' ⁇ , ⁇ ' ⁇ , if ) and ( , i y , /TM' ⁇ ), wherein the superscripts 6 and m represent the electric fundamental oscillator and the magnetic fundamental oscillator, respectively, and the superscript x, y, z represents the basic vibrator
  • the spatial polarization direction that is, the coordinate axis direction of the grid local Cartesian coordinate system.
  • Step 104 Using the number of truncated items, superimposing the spherical vector wave function mode fields of all excitation point sources to construct an equivalent mode field of the excitation point source array;
  • X ( ) represents the electric radiation field generated by the first excitation point source in the x-axis direction
  • ⁇ ( ⁇ ) represents the magnetic radiation field generated by the first excitation point source in the axial direction
  • y( ) represents the first excitation point
  • Source The electric radiation field generated in the y-axis direction
  • m 'y( ) indicates the magnetic radiation field generated by the first excitation point source in the axial direction
  • ' Z ( ) indicates the electric radiation field generated by the first excitation point source in the z-axis direction
  • z ( ) represents the magnetic radiation field generated by the first excitation point source in the z-axis direction
  • >i?, the superscript e and m respectively represent the electric fundamental oscillator and the magnetic fundamental oscillator, and the superscript X and jz represent the basic vibrator
  • the af' x ' y ' z , a '' x a '' y ' z can be expressed as a formula
  • Step 105 the radiation field of the actual MIMO antenna and the equivalent mode field.
  • d ( ) is matched to obtain a reconstruction mode field expansion coefficient model Q;
  • Q dish, the reconstruction mode field expansion coefficient model Q is obtained.
  • Step 106 Obtain the amplitude of all the excitation point sources according to the reconstruction mode field expansion coefficient model Q.
  • equation (6a) the linear equations of equation (6a) can be obtained to obtain the amplitude X of all excitation point sources, as shown in equation (6b).
  • Step 107 reconstruct an equivalent mode field according to the amplitude X of all excitation point sources. d (F);
  • the present invention further provides an apparatus for OFDM antenna out-of-channel mode field reconstruction.
  • the apparatus includes: a spherical surface determining module 21, a truncated item number obtaining module 22, and an excitation point source placing module. 23, an equivalent mode field building module 24, a reconstructed equivalent mode field module 25; wherein
  • a spherical determining module 21 configured to determine a spherical surface surrounding the MIMO antenna and the terminal to be tested;
  • a truncated item number obtaining module 22 configured to obtain a number of truncated items of a spherical vector wave function of the spherical surface determined by the spherical determining module 21;
  • the excitation point source placement module 23 is configured to be split by the spherical surface determined by the spherical surface determining module 21 Place the excitation point source on the grid point;
  • the equivalent mode field construction module 24 is configured to superimpose the spherical wave function mode field of all the excitation point sources by using the number of truncated items, and construct an equivalent mode field of the excitation point source array;
  • the spherical determining module 21 is specifically configured to determine a radius R of a spherical surface surrounding the MIMO antenna and the terminal to be tested according to the formula (1);
  • the truncated item number obtaining module 22 is specifically configured to determine the number of truncated items required for the expansion of the spherical vector wave function according to R, N, as shown in formula (2);
  • the excitation point source placing module 23 is specifically configured to divide the spherical surface determined by the spherical surface determining module 21 into a uniform hook spherical surface grid, and place three mutually perpendicular electric basic vibrators and three at each mesh mesh point position.
  • a mutually perpendicular magnetic fundamental oscillator, and the current and magnetic current directions of the electric basic oscillator and the magnetic fundamental oscillator respectively correspond to the x, y, and z coordinate axes of the mesh station i or the Cartesian coordinate system, and the above six basic oscillators constitute
  • the amplitude of the source of the first excitation point can be expressed as
  • the equivalent mode field construction module 24 is specifically configured to combine the ball vector wave function translation transformation theory, and utilize the spherical vector wave function to expand the required number of truncated items N, and the electric and magnetic radiation fields of the excitation point source are from the grid local area.
  • the Cartesian coordinate system is equivalently transformed to the mode field of the global Cartesian coordinate system, then the spherical vector wave function mode field of the first excitation point source ( ) is shown in formula (4a); the spherical vector wave function mode field of all excitation point sources is obtained.
  • the equivalent mode field of the excitation point source array is superimposed as shown in equation (4c).
  • the reconstructed equivalent mode field module 25 is specifically configured to use a radiation field of an actual MIMO antenna and an equivalent mode field.
  • d ( ) is matched to obtain the reconstruction mode field expansion coefficient model Q; According to the reconstruction mode field expansion coefficient model Q, the amplitude ⁇ of all excitation point sources is obtained; the equivalent mode field is reconstructed according to the amplitude X of all excitation point sources. d ( ).
  • the radiation field and equivalent mode field of the MIMO antenna. d ( ) is matched to solve the amplitude X of all excitation point sources. After the amplitude X of all excitation point sources is substituted into the formula (4d ), the equivalent mode field E mod (r) is reconstructed from the original actual MIMO antenna. Radiation field ⁇ ( ).
  • the radiation field ⁇ ( ) of the actual MIMO antenna is passed through with the equivalent mode field m .
  • the radiant electromagnetic field information of the outer space of the MIMO antenna can be accurately and quickly determined, and the MIMO antenna is regarded as a "black box", and the specific implementation and structure of the MIMO antenna are not involved, for any complex MIMO
  • the antenna has the same equivalent efficiency, small root mean square error, and strong versatility, which can meet the efficiency requirements and standardization requirements of the fine simulation of the communication system.

Abstract

L'invention concerne un procédé de reconstruction d'un champ de mode extérieur de canaux d'une antenne multi-entrée multi-sortie (MIMO). Le procédé comprend les étapes consistant à : établir une sphère entourant un terminal à mesurer et l'antenne MIMO ; obtenir le nombre de termes tronqués d'une fonction d'onde vectorielle sphérique de la sphère établie, et placer des sources ponctuelles d'énergie sur des nœuds de grilles formées par subdivision de la sphère ; superposer des champs de mode de la fonction d'onde vectorielle sphérique de toutes les sources ponctuelles d'énergie en utilisant le nombre de termes tronqués, puis construire un champ de mode équivalent du réseau de sources ponctuelles d'énergie ; et obtenir un champ de mode équivalent reconstruit en faisant correspondre un champ de rayonnement effectif de l'antenne MIMO au champ de mode équivalent. L'invention concerne également un dispositif de reconstruction d'un champ de mode extérieur de canaux d'une antenne MIMO. L'invention permet d'établir de manière rapide et précise des informations relatives à un champ électromagnétique de rayonnement extérieur de la sphère de l'antenne MIMO, et d'obtenir un même rendement équivalent pour une antenne MIMO complexe quelconque et une erreur quadratique moyenne réduite en offrant ainsi une réelle universalité.
PCT/CN2011/075996 2011-03-30 2011-06-20 Procédé de reconstruction d'un champ de mode extérieur de canaux d'une antenne multi-entrée multi-sortie WO2012129850A1 (fr)

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CN201110078871.1 2011-03-30
CN201110078871.1A CN102723973B (zh) 2011-03-30 一种多输入多输出天线信道外模式场重构方法及装置

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN108319777A (zh) * 2018-01-31 2018-07-24 北京卫星环境工程研究所 降低辐射环境模型不确定性对材料性能评价影响的方法
CN109861776A (zh) * 2019-01-23 2019-06-07 河海大学 一种模拟多天线室外空间耦合衰落传播特性的方法
CN112737653A (zh) * 2020-12-28 2021-04-30 重庆邮电大学 一种利用球面波模型的非均匀天线阵列系统设计方法

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CN101789812A (zh) * 2010-01-15 2010-07-28 重庆邮电大学 基于双极化天线的lte mimo通信传播信道建模方法
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CN1405675A (zh) * 2002-10-31 2003-03-26 西安海天天线科技股份有限公司 基站天线分析方法
US20070061123A1 (en) * 2005-09-09 2007-03-15 Fujitsu Limited Electromagnetic field simulator and electromagnetic field simulation program storage medium
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108319777A (zh) * 2018-01-31 2018-07-24 北京卫星环境工程研究所 降低辐射环境模型不确定性对材料性能评价影响的方法
CN108319777B (zh) * 2018-01-31 2021-04-23 北京卫星环境工程研究所 降低辐射环境模型不确定性对材料性能评价影响的方法
CN109861776A (zh) * 2019-01-23 2019-06-07 河海大学 一种模拟多天线室外空间耦合衰落传播特性的方法
CN112737653A (zh) * 2020-12-28 2021-04-30 重庆邮电大学 一种利用球面波模型的非均匀天线阵列系统设计方法

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