CN101335552A - Strip type covered intelligent antenna implementing method and apparatus - Google Patents
Strip type covered intelligent antenna implementing method and apparatus Download PDFInfo
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- CN101335552A CN101335552A CNA2007101179729A CN200710117972A CN101335552A CN 101335552 A CN101335552 A CN 101335552A CN A2007101179729 A CNA2007101179729 A CN A2007101179729A CN 200710117972 A CN200710117972 A CN 200710117972A CN 101335552 A CN101335552 A CN 101335552A
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Abstract
The invention discloses an implementation method for a band-shaped covering smart antenna which adopts a dual-radiation surface linear array, including the following steps: according to the requirements of band-shaped covering, beam steering and beam width corresponding to any radiation surface of the dual-radiation surface linear array are determined; a beam-forming weight vector is generated according to the beam steering and beam width; transmitted data from the dual-radiation surfaces of the dual-radiation surface linear array is carried out the downlink beam-forming according to the beam-forming weight vector, the forming direction diagram of the data meets the symmetrical or approximately symmetrical relation. Accordingly, the invention also provides an implementation device of the band-shaped covering smart antenna. The invention reduces the number of base stations, network construction cost and switching frequency to a certain extent, thus improving the band-shaped covered network performance of a smart antenna system.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of banded smart antenna implementation method and device that covers that be applicable to.
Background technology
In the antenna system, antenna for base station is generally array antenna, this communication system adopts wave beam forming (also claiming wave beam to form) technology, promptly according to the spatial character of signal transmission, by the space Digital Signal Processing, weight vector estimation of realization figuration or down beam shaping, thus reach the purpose that reduces interference, increase capacity, expansion covering, improves communication quality, reduction transmitting power and raising wireless data transmission rate.
In actual applications, consider the influence of factors such as distribution of communication system traffic load space and base station construction cost, may there be certain particularity in the coverage of some base station.Cover for band shape, be generally suitable for the marginal network traffic and cover along the line, promptly antenna for base station is erected at the traffic next door along the line of the ranges of linearity such as highway, railway, navigation channel, and the telephone traffic in the banded area of coverage is lower, and the user terminal translational speed is higher, switches frequent.In most cases, the array antenna radiating surface of antenna system has certain directive property, can be described as single radiating surface, and at linear antenna arrays (abbreviation linear array), because the sensing of each single antenna directional diagram is basic consistent with the normal direction of linear array radiating surface, therefore the coverage of linear array can be thought a side of radiating surface normal direction, a rightabout side is then realized covering by corresponding another base station, base station number is increased, cause network construction cost to rise, switching times in the time of simultaneously user terminal being moved increases, and causes speech quality and reliability decrease.
Chinese patent application CN200510076683 (publication number: CN1882157, open day: on December 20th, 2006) disclose a kind of intelligent antenna beam shaping method that the group covers that is used for, preliminary election was also stored multiple different beams; Arrival bearing according to the user that multicasts calculates the user distribution scope that multicasts; According to the wave beam of the user distribution scope selection storage that multicasts, realize wave beam forming.Simultaneously, this patent application also provides a kind of intelligent antenna beam shaping device that the group covers that is used for, comprise: the wave beam memory cell, the user distribution that multicasts scope acquiring unit, the wave beam forming unit, can make each wave beam cover all users that multicasts, save code channel resource, reduce the interference between the different user.But this patent application technology is not improved the banded network performance that covers of antenna system.
In summary, the existing banded intelligent antenna technology that covers obviously exists inconvenience and defective, so be necessary to be improved on reality is used.
Summary of the invention
At above-mentioned defective, the object of the present invention is to provide a kind of banded smart antenna implementation method and device that covers, it can reduce base station number, network construction cost and switch the frequency, thereby improves the banded network performance that covers of antenna system.
To achieve these goals, the invention provides a kind of banded smart antenna implementation method that covers, described smart antenna adopts biradial upper thread battle array, and this method comprises the steps:
A, according to the requirement that band shape covers, determine corresponding beam position and beamwidth at arbitrary radiating surface of biradial upper thread battle array;
B, generate the wave beam forming weight vector according to described beam position and beamwidth;
C, according to described wave beam forming weight vector the emission data of the biradial face of biradial upper thread battle array are carried out down beam shaping, its figuration directional diagram satisfies symmetry or near symmetrical relation.
The method according to this invention, described beamwidth equal the business beam width of array antenna, and the wave beam forming weight vector is a steering vector among the described step B, and the computing formula of this wave beam forming weight vector w is
γ
k(θ)＝j2π(k-1)Dsinθ/λ，k＝1，2，…，M (2)
In formula (1) and (2), []
TThe computing of expression transposition, a (θ) is a steering vector, and D represents antenna distance, and λ represents carrier wavelength, and M is an antenna number.
The method according to this invention, described beamwidth be greater than the business beam width of array antenna, and generate the wave beam forming weight vector that meets the demands according to beam position and beamwidth among the described step B.
The method according to this invention adopts window function weighting, the design of airspace filter device, global optimum's search or local quasi-optimal searching method to generate the wave beam forming weight vector that meets the demands among the described step B.
The method according to this invention is carried out down beam shaping according to the wave beam forming weight vector to the downlink base band data among the described step C and is handled, and the computing formula of down beam shaping output y is:
y＝w
H·x (3)
In the formula (3), []
HThe computing of expression conjugate transpose, w is the wave beam forming vector, x is a downlink base band data vector.
The method according to this invention, the figuration directional diagram of wave beam forming output and the direction that transmits are axis with aerial array stream shape direction among the described step C, meeting geometric symmetry or near symmetrical relation.
The method according to this invention further comprises after the described step C:
D, downlink base band figuration data are carried out signal processing, be met the radio frequency signal of launch requirements;
E, described radio frequency signal is launched by biradial upper thread battle array.
The method according to this invention is carried out digital to analog conversion, up-conversion, filtering and/or power amplification to downlink base band figuration data among the described step D and is handled, to be met the radio frequency signal of launch requirements.
The present invention also provides a kind of banded smart antenna implement device that covers, and described smart antenna adopts biradial upper thread battle array, and this device comprises:
Figuration weight vector generation unit is used for the requirement according to the band shape covering, determines beam position and beamwidth at arbitrary radiating surface of biradial upper thread battle array, to generate corresponding wave beam forming weight vector;
The wave beam forming unit is used for according to described wave beam forming weight vector the emission data of the biradial face of biradial upper thread battle array being carried out down beam shaping, and its figuration directional diagram satisfies symmetry or near symmetrical relation.
Device of the present invention further comprises:
Multichannel amplifies and transceiver unit, is used for downlink base band figuration data are carried out signal processing, is met the radio frequency signal of launch requirements;
Described biradial upper thread battle array is launched this radio frequency signal.
Smart antenna of the present invention adopts biradial upper thread battle array, requirement according to the band shape covering, determine beam position and beamwidth at arbitrary radiating surface, and then generate the down beam shaping that the wave beam forming weight vector is realized the emission data of biradial face, and the figuration directional diagram satisfies symmetry or near symmetrical relation.Whereby, the present invention can reduce base station number, network construction cost to a certain extent and switch the frequency, thereby improves the banded network performance that covers of antenna system.
Description of drawings
Fig. 1 is the structural representation of biradial upper thread battle array in one embodiment of the invention;
Fig. 2 is the single antenna array element directional diagram of biradial upper thread battle array in one embodiment of the invention;
Fig. 3 is the structural representation of the banded smart antenna implement device that covers provided by the invention;
Fig. 4 is the flow chart of the banded smart antenna implementation method that covers provided by the invention;
Fig. 5 is the wave beam forming directional diagram of eight antenna biradial upper thread battle arrays in one embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Antenna system of the present invention adopts biradial upper thread battle array, i.e. biradial upper thread aerial array, and Fig. 1 shows a kind of structure of biradial upper thread battle array, comprises linearly aligned antenna 1～antenna M, and it generally is arranged at the place, base station.Line direction between definition antenna 1 and the antenna M is the array manifold direction, points to 0 ° of normal direction with 180 ° of sensings and is defined as positive direction and opposite direction respectively, and corresponding radiating surface is called positive radiation face and antiradiation face.
Fig. 2 is a kind of single antenna array element directional diagram of biradial upper thread battle array, this single antenna array element directional diagram points to the positive direction of 0 ° of normal direction and the opposite direction of 180 ° of normal directions respectively, and satisfied symmetry or near symmetrical relation, there are positive and negative two radiating surfaces in the array antenna of Gou Chenging like this, with a radiating surface is that benchmark is realized wave beam forming, then inevitable two wave beam forming directional diagrams that generate geometry symmetry or near symmetrical on positive and negative both direction simultaneously.
Based on above-mentioned understanding, the invention provides a kind of banded smart antenna implement device that covers, as shown in Figure 3, mainly include figuration weight vector generation unit 310, wave beam forming unit 320, multichannel amplification and transceiver unit 330, biradial upper thread battle array 340, wherein:
Figuration weight vector generation unit 310, be used for requirement according to the band shape covering, for example, determine beam position and beamwidth at arbitrary radiating surface of biradial upper thread battle array 340, to generate corresponding wave beam forming weight vector according to the direction of band shape covering and the characteristics of angular range.So-called beamwidth has another name called half-power beam width, because antenna has strong directivity, its directional diagram all has two or more lobes usually, and wherein the lobe of radiation intensity maximum is called main lobe, and remaining lobe is called secondary lobe.In main lobe greatest irradiation direction both sides, the angle that radiation intensity reduces the point-to-point transmission of 3dB (power density reduces half) is defined as beamwidth.The narrow more directivity of then representing of beamwidth is good more, and operating distance is far away more, and antijamming capability is strong more.
Wave beam forming unit 320, be used for the emission data of the biradial face of biradial upper thread battle array 340 being carried out down beam shaping according to the wave beam forming weight vector, just the figuration weight vector of determining based on figuration weight vector generation unit 310 carries out beam forming processing, its wave beam forming directional diagram meeting geometric symmetry or near symmetrical relation to the downlink base band data of each user terminal.
Multichannel amplifies and transceiver unit 330, is used for downlink base band figuration data are carried out signal processing, is met the radio frequency signal of launch requirements.Described signal processing is meant carries out being met after the processing such as digital to analog conversion, up-conversion, filtering, power amplification the radio frequency signal of launch requirements to making base band figuration data that down beam shaping handles.
Biradial upper thread battle array 340 is used for described radio frequency signal is launched.
Smart antenna of the present invention is owing to adopt biradial upper thread battle array, make that the coverage of base station can be the normal direction of both sides radiating surface, avoided the opposite side of normal in the prior art to need to realize covering by other base stations, it has reduced base station number and network construction cost to a certain extent, switching times when reducing user terminal simultaneously and moving, guarantee speech quality and reliability, thereby improve the banded network performance that covers of antenna system.
The present invention also provides a kind of banded smart antenna implementation method that covers, and described smart antenna adopts biradial upper thread battle array, and as shown in Figure 4, it is as follows that the method comprising the steps of:
Step S410, according to the requirement that band shape covers, determine corresponding beam position and beamwidth at arbitrary radiating surface of biradial upper thread battle array.
Be benchmark with positive radiation face in one embodiment of the invention, requirement according to the band shape covering, determine that beam position is θ, half-power beam width is Ω, here half-power beam width Ω is not less than the business beam width of array antenna, and promptly half-power beam width Ω is more than or equal to the business beam width of array antenna.
Step S420, generate the wave beam forming weight vector according to beam position and beamwidth.
The generation method of described wave beam forming weight vector comprises multiple:
If half-power beam width Ω equals the business beam width of array antenna, then the wave beam forming weight vector is a steering vector, and for linear array, the computing formula of this wave beam forming weight vector w is:
γ
k(θ)＝j2π(k-1)Dsinθ/λ，k＝1，2，…，M (2)
In formula (1) and (2), []
TThe computing of expression transposition, a (θ) is a steering vector, and D represents antenna distance, and λ represents carrier wavelength, and M is an antenna number.
If half-power beam width Ω is greater than the business beam width of array antenna, then need be based on beam position θ and half-power beam width Ω, adopt methods such as window function weighting, the design of airspace filter device, global optimum's search, local quasi-optimal search to generate the wave beam forming weight vector w that meets the demands, the searching method based on genetic algorithm is one of local quasi-optimal searching method commonly used at present.
Step S430, according to the wave beam forming weight vector emission data of the biradial face of biradial upper thread battle array are carried out down beam shaping, its wave beam forming directional diagram satisfies symmetry or near symmetrical relation.
According to wave beam forming weight vector w the downlink base band data is carried out down beam shaping in this step and handle, and the computing formula of down beam shaping output y is:
y＝w
H·x (3)
In the formula (3), []
HThe computing of expression conjugate transpose, x is a downlink base band data vector.
The figuration directional diagram of described wave beam forming output y and the direction that transmits are axis with aerial array stream shape direction, with reference to shown in Figure 1, and meeting geometric symmetry or near symmetrical relation.
As the preferred embodiment of above-mentioned smart antenna implementation method, can further comprise:
Step S440, downlink base band figuration data are carried out signal processing, be met the radio frequency signal of launch requirements.Described signal processing is meant the radio frequency signal that base band figuration data is carried out being met after the processing such as digital to analog conversion, up-conversion, filtering, power amplification launch requirements.
Step S450, radio frequency signal is launched by biradial upper thread battle array.
Figure 5 shows that the wave beam forming directional diagram of 8 antenna biradial upper thread battle arrays in one embodiment of the invention, the beam position of its biradial face is respectively 20 ° and 160 °, half-power beam width is 21 °, adopts peaceful (Hanning) window function weighting of the Chinese, and the window function expression formula is:
Obviously the wave beam forming directional diagram and the direction that transmits are axis meeting geometric symmetry or near symmetrical relation with the array manifold direction.
In sum, smart antenna of the present invention adopts biradial upper thread battle array, requirement according to the band shape covering, determine beam position and beamwidth at arbitrary radiating surface, and then generate the down beam shaping that the wave beam forming weight vector is realized the emission data of biradial face, and the figuration directional diagram satisfies symmetry or near symmetrical relation.Whereby, the present invention can reduce base station number, network construction cost to a certain extent and switch the frequency, thereby improves the banded network performance that covers of antenna system.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1, a kind of banded smart antenna implementation method that covers, described smart antenna adopts biradial upper thread battle array, it is characterized in that this method comprises the steps:
A, according to the requirement that band shape covers, determine corresponding beam position and beamwidth at arbitrary radiating surface of biradial upper thread battle array;
B, generate the wave beam forming weight vector according to described beam position and beamwidth;
C, according to described wave beam forming weight vector the emission data of the biradial face of biradial upper thread battle array are carried out down beam shaping, its figuration directional diagram satisfies symmetry or near symmetrical relation.
2, method according to claim 1 is characterized in that, described beamwidth equals the business beam width of array antenna, and the wave beam forming weight vector is a steering vector among the described step B, and the computing formula of this wave beam forming weight vector w is
γ
k(θ)＝j2π(k-1)Dsinθ/λ，k＝1，2，...，M (2)
In formula (1) and (2), []
TThe computing of expression transposition, a (θ) is a steering vector, and D represents antenna distance, and λ represents carrier wavelength, and M is an antenna number.
3, method according to claim 1 is characterized in that, described beamwidth is greater than the business beam width of array antenna, and generates the wave beam forming weight vector that meets the demands according to beam position and beamwidth among the described step B.
4, method according to claim 3 is characterized in that, adopts window function weighting, the design of airspace filter device, global optimum's search or local quasi-optimal searching method to generate the wave beam forming weight vector that meets the demands among the described step B.
5, method according to claim 1 is characterized in that, according to the wave beam forming weight vector downlink base band data is carried out down beam shaping among the described step C and handle, and the computing formula of down beam shaping output y is:
y＝w
H·x (3)
In the formula (3), []
HThe computing of expression conjugate transpose, w is the wave beam forming vector, x is a downlink base band data vector.
6, method according to claim 5 is characterized in that, the figuration directional diagram of wave beam forming output and the direction that transmits are axis with aerial array stream shape direction among the described step C, meeting geometric symmetry or near symmetrical relation.
7, method according to claim 1 is characterized in that, further comprises after the described step C:
D, downlink base band figuration data are carried out signal processing, be met the radio frequency signal of launch requirements;
E, described radio frequency signal is launched by biradial upper thread battle array.
8, method according to claim 7 is characterized in that, among the described step D downlink base band figuration data is carried out digital to analog conversion, up-conversion, filtering and/or power amplification and handles, to be met the radio frequency signal of launch requirements.
9, a kind of smart antenna implement device of realizing as each method of claim 1～8, described smart antenna adopt biradial upper thread battle array, it is characterized in that this device comprises:
Figuration weight vector generation unit is used for the requirement according to the band shape covering, determines beam position and beamwidth at arbitrary radiating surface of biradial upper thread battle array, to generate corresponding wave beam forming weight vector;
The wave beam forming unit is used for according to described wave beam forming weight vector the emission data of the biradial face of biradial upper thread battle array being carried out down beam shaping, and its figuration directional diagram satisfies symmetry or near symmetrical relation.
10, device according to claim 9 is characterized in that, this device further comprises:
Multichannel amplifies and transceiver unit, is used for downlink base band figuration data are carried out signal processing, is met the radio frequency signal of launch requirements;
Described biradial upper thread battle array is launched this radio frequency signal.
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| CN 200710117972 CN101335552B (en) | 2007-06-26 | 2007-06-26 | Strip type covered intelligent antenna implementing method and apparatus |
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| CN 200710117972 CN101335552B (en) | 2007-06-26 | 2007-06-26 | Strip type covered intelligent antenna implementing method and apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011150790A1 (en) * | 2010-08-31 | 2011-12-08 | 华为技术有限公司 | Micro cell creating method, micro base station and communication system |
| WO2013071490A1 (en) * | 2011-11-15 | 2013-05-23 | 中兴通讯股份有限公司 | System and method for achieving wireless mobile communication network coverage |
| CN105722101A (en) * | 2016-02-01 | 2016-06-29 | 桂林电子科技大学 | Energy-saving band-shaped coverage relay station deployment method |
| CN107493125A (en) * | 2017-09-21 | 2017-12-19 | 北京航空航天大学 | A kind of analog beam shaping method of any beam angle |
| CN111638511A (en) * | 2020-06-16 | 2020-09-08 | 北京邮电大学 | Signal fusion-based multi-radar space registration cooperative detection method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246988C (en) * | 2001-04-11 | 2006-03-22 | 白桦 | Base station equipment with adaptive array and its transmitting and receiving method |
| CN100372261C (en) * | 2004-09-24 | 2008-02-27 | 华为技术有限公司 | Antenna allocation method used for highway radio covering |
-
2007
- 2007-06-26 CN CN 200710117972 patent/CN101335552B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011150790A1 (en) * | 2010-08-31 | 2011-12-08 | 华为技术有限公司 | Micro cell creating method, micro base station and communication system |
| WO2013071490A1 (en) * | 2011-11-15 | 2013-05-23 | 中兴通讯股份有限公司 | System and method for achieving wireless mobile communication network coverage |
| CN105722101A (en) * | 2016-02-01 | 2016-06-29 | 桂林电子科技大学 | Energy-saving band-shaped coverage relay station deployment method |
| CN105722101B (en) * | 2016-02-01 | 2019-08-09 | 桂林电子科技大学 | A kind of energy-efficient band-like covering relay station dispositions method |
| CN107493125A (en) * | 2017-09-21 | 2017-12-19 | 北京航空航天大学 | A kind of analog beam shaping method of any beam angle |
| CN107493125B (en) * | 2017-09-21 | 2020-08-18 | 北京航空航天大学 | Analog beam forming method with any beam width |
| CN111638511A (en) * | 2020-06-16 | 2020-09-08 | 北京邮电大学 | Signal fusion-based multi-radar space registration cooperative detection method and device |
| CN111638511B (en) * | 2020-06-16 | 2022-11-22 | 北京邮电大学 | Signal fusion-based multi-radar space registration cooperative detection method and device |
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