CN107333272B - The main line of communication based on the rotation of power lobe covers optimal glancing angle acquisition methods - Google Patents
The main line of communication based on the rotation of power lobe covers optimal glancing angle acquisition methods Download PDFInfo
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- CN107333272B CN107333272B CN201710435948.3A CN201710435948A CN107333272B CN 107333272 B CN107333272 B CN 107333272B CN 201710435948 A CN201710435948 A CN 201710435948A CN 107333272 B CN107333272 B CN 107333272B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a kind of main lines of communication based on the rotation of power lobe to cover optimal glancing angle acquisition methods, includes the following steps: the vertical range lv for measuring antenna and the main line of communication, the measurement main line of communication and warp angle theta1；Calculate the loss of vertical range spatial and car body penetration loss；It calculates vertical range and covers main lobe power angle θmax, power lobe offset function f (θ+△ θ) and critical glancing angle θGA；It calculates main lobe and meets covering index minimum power angle θminWith optimal glancing angle θGA_OPT.The present invention has the characteristics of improving customer satisfaction, improving rate of return on investment.
Description
Technical field
The present invention relates to the communication overlay technical fields of the main line of communication, are based on antenna and the main line of communication more particularly, to one kind
Vertical range, antenna hang the main line of communication covering based on the rotation of power lobe that high, different incidence angles correspond to car body penetration loss
Optimal glancing angle acquisition methods.
Background technique
With the rapid development that the main lines of communication such as high-speed railway, highway are built, the communication overlay problem of the main line of communication
The hot issue of industry research is also become, but currently without the method that one kind effectively calculates best glancing angle, to solve this
A difficult point, to propose a kind of optimal glancing angle acquisition methods of main line of communication covering based on the rotation of power lobe.Due to day
The power lobe approximate ellipsoidal of line transmitting causes main lobe power maximum value direction to intersect covering nearby preferably with the main line of communication,
But the signal covering of the corresponding overlay area of main lobe power wide-angle point, the especially big situation of glancing angle cannot be effectively ensured
Under, the signal covering on antennas orthogonal main line of communication periphery is difficult to ensure instead, causes black phenomenon under lamp.Different glancing angles pair simultaneously
It answers car body loss also different, how effectively to guarantee that different glancing angles cause different propagation losses and the corresponding main lobe of penetration loss
Whether meet demand also becomes the difficult point for planning glancing angle to the corresponding covering of different angle power points.
Summary of the invention
Goal of the invention of the invention is to overcome the corresponding overlay area of main lobe power wide-angle point in the prior art
Signal covering is poor, especially glancing angle it is big in the case where, the signal on antennas orthogonal main line of communication periphery is covered and is difficult to ensure instead
Deficiency, provide and a kind of the corresponding car body of height, different incidence angles is hung based on antenna and main line of communication vertical range, antenna penetrate damage
The main line of communication based on the rotation of power lobe of consumption covers optimal glancing angle acquisition methods.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of optimal glancing angle acquisition methods of main line of communication covering based on the rotation of power lobe, include the following steps:
The vertical range l of (1-1) measurement antenna and the main line of communicationv, measure the main line of communication and warp angle theta1；
(1-2) calculates the loss of vertical range spatial and car body penetration loss；
(1-3) calculates vertical range and covers main lobe power angle θmax, power lobe rotation function f (θ+Δ θ) and critical graze
Angle θGA；
(1-4) calculates main lobe and meets covering index minimum power angle θminWith optimal glancing angle θGA_OPT。
The present invention is hung high, different incidence angles by founding mathematical models from antenna and main line of communication vertical range, antenna
The factors such as car body penetration loss are set out, and same sector covering signal can be made to meet the continuity of index, to guarantee that user feels
While knowing, optimal glancing angle θ is obtainedGA_OPT。
The resulting main line of communication based on the rotation of power lobe of the present invention covers optimal glancing angle acquisition methods, from power angle
Lobe intensity accounts for, and proposes that completely new optimal glancing angle determines method.
The resulting main line of communication based on the rotation of power lobe of the present invention covers optimal glancing angle acquisition methods, comprehensively considers
The different car body loss of the correspondence of power angle lobe intensity and different glancing angles guarantees while meeting covering level index
The maximum effective coverage distance of single sector, to improve customer satisfaction most possibly, identical construction mode reduces construction website
Number, promotes rate of return on investment to greatest extent.
Preferably, step (1-2) includes the following steps:
(1-2-1) calculates the path loss L of antenna to car body outer surface
L=46.3+33.9log10f-13.82log10hs+(44.9-6.55log10hs)log10lv+M；
Wherein: f is signal frequency, hsHeight is hung for antenna, M is modifying factor；
(1-2-2) calculates the vertical car body penetration loss S of electromagnetic wave signalP1
Wherein: ω is angular frequency, and μ is magnetic conductivity, and σ is conductivity, ρ1、ρ2Respectively air and car body materials density, v1、
v2Respectively propagation rate of the electromagnetic wave in air and car body materials, d are that electromagnetic wave signal penetrates car body by distance.
Preferably, step (1-3) includes the following steps:
(1-3-1) calculates vertical range and covers main lobe power angle
It is established the following equation according to covering level index request, utilizes equation calculation θmax,
Δ θ=θmax-θ1-π/2；
Wherein: the base station E machine top radiant power, G peak antenna gain, CLFor cable and splicing loss, f (θ) normalizes wave
Valve power coefficient, θ lobe power angle,For the maximum θ value for meeting condition in bracket, SP1For the loss of vertical car body, S is to cut
Tape swapping level surplus, K are that covering requires level value index；
(1-3-2) obtains power lobe rotation function
Power lobe rotation function f (θ+Δ θ) is obtained using Δ θ；
(1-3-3) calculates vertical range and covers critical glancing angle θGA
θGA=pi/2-(θmax-θ0), wherein θ0For main lobe radiation angle.
Preferably, step (1-4) includes the following steps:
Utilize formulaCalculate θmin；
Wherein: SP2It is slanted through car body penetration loss for signal,For the minimum θ value for meeting condition in bracket；
Enable θ0'=θ0Δ θ, utilizes θ0' and θminCompare, works as θ0’≥θminWhen, optimal glancing angle θGA_OPT=pi/2-(θmax-
θ0)；Work as θ0' < θminWhen, according to the symmetry of lobe power angle, optimal glancing angle is in θGAOn the basis of must rotation angle be 2
(θmin-θ0'), i.e. θGA_OPT=θGA+2(θmin-θ0'), obtain optimal glancing angle θGA_OPT(such as following formula)
Preferably, calculating S using following formulaP1:
Wherein, n1、n2Respectively refractive index of the electromagnetic wave in air and car body materials.
Preferably, calculating S using following formulaP2:
Wherein, n1、
n2Respectively refractive index of the electromagnetic wave in air and car body materials.
Therefore, while the invention has the following beneficial effects: covering level index is met, guarantee single sector maximal cover
Distance, to improve customer satisfaction most possibly, identical construction mode reduces construction website number, promotes investment to greatest extent
Return rate.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the main line of communication and antenna glancing angle of the invention.
In figure: antenna 1, car body 2.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment as shown in Figure 1 is a kind of optimal glancing angle acquisition side of main line of communication covering based on the rotation of power lobe
Method includes the following steps:
The vertical range l of (1-1) measurement antenna and the main line of communicationv, measure the main line of communication and warp angle theta1；
(1-2) calculates the loss of vertical range spatial and car body penetration loss；
(1-2-1) calculates the path loss L of antenna to car body outer surface
L=46.3+33.9log10f-13.82log10hs+(44.9-6.55log10hs)log10lv+M；
Wherein: f is signal frequency, hsHeight is hung for antenna, M is modifying factor；
(1-2-2) calculates the vertical car body penetration loss S of electromagnetic wave signalP1
Wherein: ω is angular frequency, and μ is magnetic conductivity, and σ is conductivity, ρ1、ρ2Respectively air and car body materials density, v1、
v2Respectively propagation rate of the electromagnetic wave in air and car body materials, d are that electromagnetic wave signal penetrates car body by distance.
(1-3) calculates vertical range and covers main lobe power angle θmax, power lobe rotation function f (θ+Δ θ) and critical graze
Angle θGA；
(1-3-1) calculates vertical range and covers main lobe power angle
It is established the following equation according to covering level index request, utilizes equation calculation θmax,
Δ θ=θmax-θ1-π/2；
Wherein: the base station E machine top radiant power, G peak antenna gain, CLFor cable and splicing loss, f (θ) normalizes wave
Valve power coefficient, θ lobe power angle,For the maximum θ value for meeting condition in bracket, SP1For the loss of vertical car body, S is to cut
Tape swapping level surplus, K are that covering requires level value index；
(1-3-2) obtains power lobe rotation function
Power lobe rotation function f (θ+Δ θ) is obtained using Δ θ；
(1-3-3) calculates vertical range and covers critical glancing angle θGA
θGA=pi/2-(θmax-θ0), wherein θ0For main lobe radiation angle.
(1-4) calculates main lobe and meets covering index minimum power angle θminWith optimal glancing angle θGA_OPT.Utilize formulaCalculate θmin；
Wherein: SP2It is slanted through car body penetration loss for signal,For the minimum θ value for meeting condition in bracket；
Enable θ0'=θ0Δ θ, utilizes θ0' and θminCompare, works as θ0’≥θminWhen, optimal glancing angle θGA_OPT=pi/2-(θmax-
θ0)；Work as θ0' < θminWhen, according to the symmetry of lobe power angle, optimal glancing angle is in θGAOn the basis of must rotation angle be 2
(θmin-θ0'), i.e. θGA_OPT=θGA+2(θmin-θ0'), obtain optimal glancing angle θGA_OPT(such as following formula)
Specific example:
This example include straight distance and angle measurement, vertical range spatial loss and car body penetration loss, vertically away from
, power lobe rotation function determining from covering main lobe power angle and optimal glancing angle, main lobe meet covering index minimum power angle,
The effective overlay length of single sector and etc..
It is specifically described by taking the main line of communication (as shown in Figure 1) as an example below.It include antenna 1 and car body 2 in Fig. 1.
Step 1: antenna and main line of communication vertical range and the main line of communication and warp angle measure
Step 1-1: the vertical range l of measurement antenna and the main line of communicationv=0.2km；
Step 1-2: the angle theta of the measurement main line of communication and warp1=π/6；
Step 2: the loss of vertical range spatial and car body penetration loss
Step 2-1: antenna is calculated to car body outer surface path loss according to propagation model
L=46.3+33.9log10f-13.82log10hs+(44.9-6.55log10hs)log10l+M；
Wherein: f is signal frequency, f=1920MHz；
Hs is that antenna hangs height, hs=35m；
M is the modifying factor after model correction, M=5dB；
L is antenna and car body incidence point distance l=lv=0.2km；
Step 2-2: the vertical car body penetration loss of electromagnetic wave
Electromagnetic wave can generate absorption and reflection loss after car body, and loss is SP1
Wherein: ω is angular frequency, π × 1920 ω=2；
μ is magnetic conductivity, π × 10 μ=4-7(H/m)；
σ is conductivity, σ=57.2 (Sm/mm)；
ρ1、ρ2It is taken as air and glass of vehicle body density of material, ρ respectively1=1.293kg/m3, ρ2=2500kg/m3；
n1、n2Refractive index of the electromagnetic wave in air and glass of vehicle body material, n are taken respectively1=1.0003, n2=1.46；
D is that electromagnetic wave signal penetrates car body by distance, d=0.015m；
Step 3: vertical range covers main lobe power angle, power lobe rotation function and critical glancing angle and determines
Step 3-1: vertical range covers main lobe power angle and determines
Equation is established according to covering level index request, is solved according to equation (being shown below) and obtains θmax,
Wherein: the base station E machine top radiant power, E=43dBm；
G peak antenna gain, G=20dB；
CLFor cable and splicing loss, CL=12dB；
F (θ) normalizes lobe power coefficient；
θ0For main lobe radiation angle, θ0=pi/2；
SP1It is lost for vertical car body,
S is switching band level surplus, S=3dB；
K is that covering requires level value index, K=-100dBm；
Numerical value substitutes into formula and obtains θmax=0.818412684 π
Step 3-2: power lobe rotation function
Calculate Δ θ=θmax-θ1Pi/2=0.818412684 π-π/6- pi/2=0.151746017 π
Power lobe function f (θ+Δ θ) is obtained according to Δ θ,
Step 3-3: vertical range covers critical glancing angle θGAIt is as follows
θGA=pi/2-(θmax-θ0)=pi/2-(0.818412684 π-pi/2)=0.181587316 π
Step 4: main lobe meets covering index minimum power angle θminAnd optimal glancing angle θGA_OPTIt determines
θ value interval (0, π), step-length s=0.001
If | E+G+10log10f(θ+Δθ)-(SP2+L+CL)-K | < eps is corresponding
Wherein: SP2Car body penetration loss is slanted through for signal；
Take eps=0.002
When θ=0.40794556 π,
E+G+10log10f(θ+Δθ)-(SP2+L+CL)-K=0.001665127 < 0.002
Take θmin=0.40794556 π
Enable θ0'=θ0Δ θ, utilizes θ0' and θminCompare, works as θ0’≥θminWhen, optimal glancing angle θGA_OPT=pi/2-(θmax-
θ0)；Work as θ0' < θminWhen, according to the symmetry of lobe power angle, optimal glancing angle is in θGAOn the basis of must rotation angle be 2
(θmin-θ0'), i.e. θGA_OPT=θGA+2(θmin-θ0'), obtain optimal glancing angle θGA_OPT(such as following formula)
θ0'=pi/2-0.151746017 π=0.348253983 π
θmin=0.40794556 π
θ0The π < θ of '=0.348253983min=0.40794556 π
θGA_OPT=θGA+2(θmin-θ0’)
=0.181587316+2 × (0.40794556 π -0.348253983 π) of π
=0.241278894 π
The present invention is accounted for from different power waves valves angle Strength Changes, proposes that the completely new main line of communication covers optimal graze
Angle determines method.
The present invention has comprehensively considered the different car body loss of correspondence of power lobe intensity and different glancing angles, meets covering
While level index, guarantee single sector largest coverage distance, thus improve customer satisfaction most possibly, identical Construction Party
Formula reduces construction website number, promotes rate of return on investment to greatest extent.
It should be understood that this embodiment is only used to illustrate the invention but not to limit the scope of the invention.In addition, it should also be understood that, In
After having read the content of the invention lectured, those skilled in the art can make various modifications or changes to the present invention, these etc.
Valence form is also fallen within the scope of the appended claims of the present application.
Claims (2)
1. a kind of main line of communication based on the rotation of power lobe covers optimal glancing angle acquisition methods, characterized in that including as follows
Step:
The vertical range l of (1-1) measurement antenna and the main line of communicationv, measure the main line of communication and warp angle theta1；
(1-2) calculates the loss of vertical range spatial and car body penetration loss；
(1-3) calculates vertical range and covers main lobe power angle θmax, power lobe rotation function f (θ+Δ θ) and critical glancing angle
θGA；
(1-3-1) calculates vertical range and covers main lobe power angle
It is established the following equation according to covering level index request, utilizes equation calculation θmax,
Δ θ=θmax-θ1-π/2；
Wherein: L is path loss of the antenna to car body outer surface, the base station E machine top radiant power, G peak antenna gain, CLFor line
Cable and splicing loss, f (θ) normalization lobe power coefficient, θ lobe power angle,For the maximum θ for meeting condition in bracket
Value, SP1For the loss of vertical car body, S is switching band level surplus, and K is that covering requires level value index；
(1-3-2) obtains power lobe rotation function
Power lobe rotation function f (θ+Δ θ) is obtained using Δ θ；
(1-3-3) calculates vertical range and covers critical glancing angle θGA
θGA=pi/2-(θmax-θ0), wherein θ0For main lobe radiation angle；
(1-4) calculates main lobe and meets covering index minimum power angle θminWith optimal glancing angle θGA_OPT；
Utilize formulaCalculate θmin；
Wherein: SP2It is slanted through car body penetration loss for signal,For the minimum θ value for meeting condition in bracket；
Wherein, n1、n2Respectively refractive index of the electromagnetic wave in air and car body materials；
Enable θ0'=θ0Δ θ, utilizes θ0' and θminCompare, obtains optimal glancing angle θGA_OPT:
Wherein, ω is angular frequency, and μ is magnetic conductivity, and σ is conductivity, ρ1、ρ2Respectively air and car body materials density, v1、v2Respectively
The propagation rate for being electromagnetic wave in air and car body materials, d are that electromagnetic wave signal penetrates car body by distance.
2. the main line of communication according to claim 1 based on the rotation of power lobe covers optimal glancing angle acquisition methods,
It is characterized in, step (1-2) includes the following steps:
(1-2-1) calculates the path loss L of antenna to car body outer surface
L=46.3+33.9log10f-13.82log10hs+(44.9-6.55log10hs)log10lv+M；
Wherein: f is signal frequency, hsHeight is hung for antenna, M is modifying factor；
(1-2-2) calculates the vertical car body penetration loss S of electromagnetic wave signalP1
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2017
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| CN101431757A (en) * | 2008-09-08 | 2009-05-13 | 中国移动通信集团广东有限公司 | Method for computing station spacing by using signal glancing angle in high-speed moving surroundings |
| CN103118372A (en) * | 2013-01-30 | 2013-05-22 | 江苏省邮电规划设计院有限责任公司 | Setting method of CDMA (code division multiple access) wireless communication network in high-speed rail environment |
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