CN104469803B - A kind of vertical beam method of adjustment and device - Google Patents
A kind of vertical beam method of adjustment and device Download PDFInfo
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- CN104469803B CN104469803B CN201310453199.9A CN201310453199A CN104469803B CN 104469803 B CN104469803 B CN 104469803B CN 201310453199 A CN201310453199 A CN 201310453199A CN 104469803 B CN104469803 B CN 104469803B
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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
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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Abstract
The present invention provides a kind of vertical beam method of adjustment and device, including：According to the upward signal of user equipment, the angle of arrival of the user equipment in vertical direction is determined using the steering vector of the affiliated antenna in base station；First forming vectors are determined according to the angle of arrival, and by the antenna belonging to base station under specific electrical down-tilting angle corresponding forming vectors, as the second forming vectors；Vertical beam forming vectors using the product of first forming vectors and second forming vectors as the user equipment, are adjusted using the vertical beam forming vectors to the vertical beam of the user equipment.The present invention is modified by using the second forming vectors to the first forming vectors, the vertical beam of user equipment is adjusted by using revised forming vectors, so as to alleviate the problem of secondary lobe is excessive, it is suppressed that the interference of minizone.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of vertical beam method of adjustment and device.
Background technology
With the development of wireless communication technology, 3D-MIMO（Multiple-Input Multiple-Out-put, enter more more
Go out）Technology strengthens technology as a physical layer, has obtained more and more extensive attention.Wherein, the standardization body such as 3GPP has been
Through carrying out preliminary research to the technology, and detail discussion is done in application scenarios of the technology etc..3D-MIMO technologies
Core be just the increase in the figuration of vertical direction, so as to for UE（User Experience, Consumer's Experience）It is dynamic to adjust
Whole tilt angled down, to strengthen UE received signal strength, and terminate to be combined with interference coordination, reduce adjacent area interference.
At present, the vertical beam of user is adjusted by the use of UE steering vector as forming vectors.However, utilize mesh
Preceding method of adjustment is adjusted to the vertical beam of user, when the problem of secondary lobe is excessive being present when tilt angled down is larger, from
And cause the interference of minizone.
The content of the invention
（One）The technical problem of solution
Present invention solves the technical problem that it is：How a kind of vertical beam method of adjustment and device are provided, solves secondary lobe mistake
It is high and the problem of cause inter-cell interference.
（Two）Technical scheme
The embodiments of the invention provide a kind of vertical beam method of adjustment, including：
According to the upward signal of user equipment, determine that the user equipment is hanging down using the steering vector of the affiliated antenna in base station
The upward angle of arrival of Nogata；
First forming vectors are determined according to the angle of arrival；
By the affiliated antenna in base station under specific electrical down-tilting angle corresponding forming vectors, as the second forming vectors；
Vertical beam using the product of first forming vectors and second forming vectors as the user equipment
Forming vectors, the vertical beam of the user equipment is adjusted using the vertical beam forming vectors.
Preferably, it is described that first forming vectors are determined according to the angle of arrival, specifically include：
By the angle of arrival compared with predetermined angle；
When the angle of arrival is more than the predetermined angle, then using steering vector corresponding to the predetermined angle as
One forming vectors；
When the angle of arrival is less than the predetermined angle, then using steering vector corresponding to the angle of arrival as
One forming vectors.
Preferably, the predetermined angle is 20 degree.
Preferably, the angle of arrival is -30~30 degree of degree.
Preferably, the tilt angled down is 0 degree.
Preferably, the upward signal according to user equipment, using described in the steering vector determination of the affiliated antenna in base station
The angle of arrival of user equipment in vertical direction, is specifically included：
According to the steering vector of the affiliated antenna in the base station, the up channel estimation in frequency domain of user equipment is carried out；
The up channel estimation in frequency domain is averaging in frequency domain direction, obtains average channel estimation；
User equipment is calculated in Vertical Square according to the steering vector of the affiliated antenna in the base station and the average channel estimation
The performance number of each angle upwards；
Corresponding angle when selection makes the performance number maximum, obtains angle of arrival.
Example in real time of the invention additionally provides a kind of vertical beam adjusting apparatus, including：
Computing module, institute is determined for the upward signal according to user equipment and using the steering vector of the affiliated antenna in base station
The angle of arrival of user equipment in vertical direction is stated, the angle of arrival is transferred to the first forming vectors module；
First forming vectors module, for determining the first forming vectors according to the angle of arrival, by first figuration
Vector transmission is to adjusting module；
Second forming vectors module, for using the affiliated antenna in base station under electrical down-tilting angle corresponding forming vectors as
Two forming vectors, second forming vectors are transferred to the adjusting module；
The adjusting module, for first forming vectors for obtaining the first forming vectors module and described
Vertical beam forming vectors of the product for second forming vectors that two forming vectors modules obtain as the user equipment,
The user equipment is adjusted using the vertical beam forming vectors.
Preferably, described device also includes：Comparison module, wherein,
Angle of arrival is further transferred to comparison module by the computing module；
The comparison module, for compared with predetermined angle, the angle of arrival to be transferred into by comparative result
One forming vectors module；
First forming vectors module, for when the angle of arrival is more than the predetermined angle, then by the preset angle
Steering vector corresponding to degree is as the first forming vectors；When the angle of arrival is less than the predetermined angle, then arrived by described in
Up to steering vector corresponding to angle as the first forming vectors.
Preferably,
The second forming vectors module, be additionally operable to by the affiliated antenna in the base station electrical down-tilting angle be 0 when it is corresponding
Forming vectors are as the second forming vectors.
Preferably, described device also includes：
Estimation module, for the steering vector according to the affiliated antenna in the base station, the up frequency domain for carrying out user equipment is believed
Road is estimated, and up channel estimation in frequency domain is sent into computing module；
The computing module, for the up channel estimation in frequency domain to be averaging in frequency domain direction, obtain average channel
Estimation, and for calculating user equipment vertical according to the steering vector of the affiliated antenna in the base station and the average channel estimation
The performance number of each angle on direction, and by the user equipment being calculated in vertical direction each angle performance number send
To selecting module；
The selecting module, corresponding angle when making the performance number maximum for selection, obtains angle of arrival.
（Three）Beneficial effect
The embodiment of the present invention is by providing a kind of vertical beam method of adjustment and device, by using the guiding of user equipment
The user equipment angle of arrival in vertical direction that vector determines determines the first forming vectors, and utilizes the day belonging to base station
Line corresponding forming vectors under specific electrical down-tilting angle as the second forming vectors, are assigned using second forming vectors to first
Shape vector is modified, and the vertical beam of user equipment is adjusted by using revised forming vectors, so as to mitigate
The problem of secondary lobe is too high, it is suppressed that the interference of minizone.
Brief description of the drawings
Fig. 1 is the method flow diagram that the embodiment of the present invention 1 provides；
Fig. 2 is the method flow diagram that the embodiment of the present invention 2 provides；
Fig. 3 is that being compareed when angle of arrival is 16 degree with the radianting capacity of prior art for the offer of the embodiment of the present invention 2 is shown
It is intended to；
Fig. 4 is the apparatus structure schematic diagram that the embodiment of the present invention 3 provides.
Embodiment
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Embodiment 1：
In order to solve the problems, such as to propose in the prior art, the embodiments of the invention provide a kind of vertical beam method of adjustment,
The flow chart of this method is as shown in figure 1, this method includes：
Step S1：According to the upward signal of user equipment, the user is determined using the steering vector of the affiliated antenna in base station
The angle of arrival of equipment in vertical direction；
Step S2：First forming vectors are determined according to the angle of arrival；
Step S3：By the affiliated antenna in base station under specific electrical down-tilting angle corresponding forming vectors, as the second figuration swear
Amount；
Step S4：Using the product of first forming vectors and second forming vectors hanging down as the user equipment
Straight beamforming vector, the vertical beam of the user equipment is adjusted using the vertical beam forming vectors.
The embodiment of the present invention by using the affiliated antenna in base station steering vector determine user equipment in vertical direction
Angle of arrival determine the first forming vectors, and using the antenna belonging to base station under specific electrical down-tilting angle corresponding figuration
Vector is modified, after amendment as the second forming vectors using second forming vectors to the first forming vectors
Forming vectors the vertical beam of user equipment is adjusted, so as to alleviate the problem of secondary lobe is too high, it is suppressed that minizone
Interference.
After the angle of arrival of the user equipment in vertical direction is obtained, if directly by corresponding to the angle of arrival
Steering vector is as forming vectors, then when main lobe is aligned, may at the symmetric position of tilt angled down corresponding to the main lobe
Secondary lobe is too high in appearance, by the way that angle of arrival compared with predetermined angle, is sweared so as to be oriented to corresponding to less angle
Amount is used as the first forming vectors, it is suppressed that the problem of secondary lobe is too high on occurring at symmetric position.
By the summary of experience of history obtain predetermined angle for 20 degree, so as to inhibit at the symmetric position occur on it is other
The problem of valve is too high.
Due to when when tilt angled down is 60 degree the main lobe it is normal, and at the symmetric position of the main lobe it is possible that upper side
Valve is too high, thus will determine obtained angle of arrival for~30 degree of -30 degree when main lobe or secondary lobe it is normal, therefore only follow-up
In polling procedure, a poll -30 spends~30 degree of scope, so as to inhibit the too high problem of secondary lobe, and reduces calculating
Complexity.
When the tilt angled down of the affiliated antenna of user equipment is 0, then only the steering vector of user equipment need to be determined what is obtained
Angle of arrival determines the first forming vectors, reduces computation complexity.
Embodiment 2：
According to foregoing description, the embodiment of the present invention additionally provides a kind of vertical beam method of adjustment, is above-described embodiment 1
Method detailed, as shown in Fig. 2 this method includes：
Step 101：eNoedB（Evolved Node B）According to the upward signal of user equipment, the affiliated antenna in base station is utilized
Steering vector determines the angle of arrival of the user equipment in vertical direction；
Wherein, when the angle difference of user equipment and antenna, then steering vector corresponding to the user equipment is different, therefore
Each angle of arrival（AOA, Angle of Arrival）A corresponding steering vector.
In embodiments of the present invention, the user equipment is determined in vertical direction using the steering vector of the affiliated antenna in base station
Angle of arrival method, including two ways, wherein,
Mode 1：
A1, assume that up channel response is Hl, then spatial correlation matrix is designated as：
Wherein, l represents l-th of user, Hl' representing matrix HlConjugate transposition；
A2, definition steering vector are：α(θ)=exp[j*k*d*(N-1)*cos(θ)]；
Wherein θ is angle, and k is wave number, and k=2 π f/c, d are array element spacing, and N is antenna element number；
A3, the performance number for calculating each angle, θ：
A4, selection P (θ) maximum corresponding to θ values, the as AOA of user equipment value.
Mode 2：
B1, eNodeB calculate the up channel estimation in frequency domain H of user equipmentk×N；
Wherein, k represents number of sub carrier wave, and N represents antenna element number；
B2, by the H in 4 resource blocksk×mIt is averaging in frequency domain direction, obtains average channel estimation H1×m；
B3, user equipment calculated vertical according to the steering vector of the affiliated antenna in the base station and the average channel estimation
The performance number of each angle on direction,
Corresponding angle when B4, selection make the performance number maximum, obtains angle of arrival.
Step 102：One predetermined angle is set according to historical experience；
Wherein, the predetermined angle radiates to antenna element and antenna extension is high related, show that this is default according to historical experience
Angle, θ is 20 degree.
In embodiments of the present invention, due to when main lobe is aligned, corresponding to the main lobe at the symmetric position of tilt angled down
It is possible that upper secondary lobe is too high, therefore, the predetermined angle is set as 20 degree, on inhibiting at the symmetric position and occurring
The problem of secondary lobe is too high.
Step 103：By the angle of arrival obtained in step 101 compared with the predetermined angle in step 102, when described
When angle of arrival is more than the predetermined angle, then using steering vector corresponding to the predetermined angle as the first forming vectors w1；
When the angle of arrival is less than the predetermined angle, then steering vector corresponding to the angle of arrival is sweared as the first figuration
Amount；
Wherein, due to using steering vector corresponding to angle of arrival as forming vectors, then can directly occur when main lobe is aligned
When, corresponding to the main lobe at the symmetric position of tilt angled down it is possible that the too high problem of upper secondary lobe, in the embodiment of the present invention
In, by by angle of arrival compared with predetermined angle, so as to using steering vector corresponding to less angle as first assign
Shape vector, it is suppressed that the problem of secondary lobe is too high on occurring at symmetric position.
Step 104：By the affiliated antenna in base station under specific electrical down-tilting angle corresponding forming vectors, as the second figuration swear
Measure w2；
Wherein, the scope of the affiliated antenna in the base station corresponding forming vectors under electrical down-tilting angle is 0 degree~9 degree, under this
Corresponding steering vector when degree of tilt is generally 0 degree, 3 degree, 6 degree and 9 degree, the antenna manufacturer is when providing the parameter, it is contemplated that
The requirement of upper secondary lobe and null-fill, then only need to be true by the steering vector of the affiliated antenna in base station when the tilt angled down is 0 degree
Surely the angle of arrival obtained determines the first forming vectors, reduces computation complexity, and pass through second forming vectors
It ensure that the requirement of secondary lobe and null-fill.
In embodiments of the present invention, the order of above-mentioned steps 103 and step 104 can be upset.
Step 105：Using the product of first forming vectors and second forming vectors as the user equipment
Vertical beam forming vectors, the vertical beam of the user equipment is adjusted using the vertical beam forming vectors.
In embodiments of the present invention, the first forming vectors are modified using the second forming vectors, by using amendment
Forming vectors afterwards are adjusted to the vertical beam of user equipment, so as to alleviate the problem of secondary lobe is excessive, it is suppressed that cell
Between interference.
Wherein, because the angle vertically included of user equipment and antenna is -180 degree~180 degree, therefore profit is set
The angle of arrival of the user equipment for determining to obtain with the steering vector of user equipment in vertical direction is -180 degree~180 degree,
It ensure that the integrality of angle of arrival.
For example, when tilt angled down be 60 degree when the main lobe it is normal, and at the symmetric position of the main lobe it is possible that on
Secondary lobe is too high, thus will determine obtained angle of arrival for~30 degree of -30 degree when main lobe or secondary lobe it is normal, therefore only follow-up
Polling procedure in, poll -30 spends~30 degree of scope, so as to inhibit the too high problem of secondary lobe, and reduces meter
Calculate complexity.
After being adjusted by the above method to the vertical beam of user equipment, obtained radianting capacity and prior art
Radianting capacity compares schematic diagram, as shown in figure 3, so that tilt angled down is 16 degree as an example, and the figure is that angle of arrival is -180~180
Schematic diagram is spent, the upper side of the radianting capacity curve obtained by method provided in an embodiment of the present invention is can be seen that by the figure
The upper secondary lobe for the curve that valve substantially obtains than prior art is low.
The embodiment of the present invention by using the affiliated antenna in base station steering vector determine user equipment in vertical direction
Angle of arrival to determine the first forming vectors, and be oriented to arrow using the antenna belonging to base station is corresponding when tilt angled down is 0
Amount is used as the second forming vectors, the first forming vectors is modified using second forming vectors, by using revised
Forming vectors are adjusted to the vertical beam of user equipment, so as to alleviate the problem of secondary lobe is excessive, it is suppressed that minizone
Interference.
Embodiment:3：
The embodiments of the invention provide a kind of vertical beam adjusting apparatus, as shown in figure 4, the device includes：
Computing module 201, it is for the upward signal according to user equipment and true using the steering vector of the affiliated antenna in base station
The fixed angle of arrival of the user equipment in vertical direction, the first forming vectors module is transferred to by the angle of arrival；
First forming vectors module 202, for determining the first forming vectors according to the angle of arrival, described first is assigned
Shape vector transmission is to adjusting module；
Second forming vectors module 203, for by the affiliated antenna in base station electrical down-tilting angle be 0 when corresponding forming vectors
As the second forming vectors, second forming vectors are transferred to the adjusting module；
Adjusting module 204, for first forming vectors for obtaining the first forming vectors module and described
Vertical beam forming vectors of the product for second forming vectors that two forming vectors modules obtain as the user equipment,
The user equipment is adjusted using the vertical beam forming vectors.
Further, described device also includes：Comparison module, wherein,
Comparison module, for by the angle of arrival compared with predetermined angle；
First forming vectors module, for when the angle of arrival is more than the predetermined angle, then by the preset angle
Steering vector corresponding to degree is as the first forming vectors；When the angle of arrival is less than the predetermined angle, then arrived by described in
Up to steering vector corresponding to angle as the first forming vectors.
Further, the second forming vectors module, it is 0 in electrical down-tilting angle to be additionally operable to the affiliated antenna in the base station
When corresponding forming vectors as the second forming vectors.
Further, described device also includes：
Estimation module, for the steering vector according to the affiliated antenna in the base station, the up frequency domain for carrying out user equipment is believed
Road is estimated, and up channel estimation in frequency domain is sent into computing module；
The computing module, for the up channel estimation in frequency domain to be averaging in frequency domain direction, obtain average channel
Estimation, and for calculating user equipment in vertical direction according to the steering vector of the user equipment and the average channel estimation
The performance number of upper each angle, and the performance number of the user equipment being calculated each angle in vertical direction is sent to choosing
Select module；
The selecting module, corresponding angle when making the performance number maximum for selection, obtains angle of arrival.
The embodiment of the present invention is by providing by a kind of vertical beam adjusting apparatus, by computing module using belonging to base station
The angle of arrival of the user equipment that the steering vector of antenna determines in vertical direction determines the first forming vectors, the second figuration
Antenna belonging to vector module by the use of the affiliated antenna in base station under tilt angled down corresponding steering vector as the second forming vectors,
The first forming vectors are modified using second forming vectors, by adjusting module using revised forming vectors to
The vertical beam of family equipment is adjusted, so as to alleviate the problem of secondary lobe is excessive, it is suppressed that the interference of minizone.
For above-mentioned vertical beam adjusting apparatus, the device is arranged in base station.
Embodiment of above is merely to illustrate the present invention, and not limitation of the present invention, about the common of technical field
Technical staff, without departing from the spirit and scope of the present invention, it can also make a variety of changes and modification, thus it is all
Equivalent technical scheme falls within scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (8)
- A kind of 1. vertical beam method of adjustment, it is characterised in that including：According to the upward signal of user equipment, determine the user equipment in Vertical Square using the steering vector of the affiliated antenna in base station Upward angle of arrival；First forming vectors are determined according to the angle of arrival；By the affiliated antenna in base station under specific electrical down-tilting angle corresponding forming vectors, it is described specific as the second forming vectors The span of lower decline angle is 0 degree~9 degree；Vertical beam figuration using the product of first forming vectors and second forming vectors as the user equipment Vector, the vertical beam of the user equipment is adjusted using the vertical beam forming vectors；Wherein, the upward signal according to user equipment, determine that the user sets using the steering vector of the affiliated antenna in base station Standby angle of arrival in vertical direction, specifically include：According to the steering vector of the affiliated antenna in the base station, the up channel estimation in frequency domain of user equipment is carried out；The up channel estimation in frequency domain is averaging in frequency domain direction, obtains average channel estimation；User equipment is calculated in vertical direction according to the steering vector of the affiliated antenna in the base station and the average channel estimation The performance number of each angle；Corresponding angle when selection makes the performance number maximum, obtains angle of arrival.
- 2. the method as described in claim 1, it is characterised in that it is described that first forming vectors are determined according to the angle of arrival, Specifically include：By the angle of arrival compared with predetermined angle；When the angle of arrival is more than the predetermined angle, then assigned steering vector corresponding to the predetermined angle as first Shape vector；When the angle of arrival is less than the predetermined angle, then assigned steering vector corresponding to the angle of arrival as first Shape vector.
- 3. method as claimed in claim 2, it is characterised in that the predetermined angle is 20 degree.
- 4. the method as described in claim 1, it is characterised in that the angle of arrival is -30~30 degree of degree.
- 5. the method as described in claim 1, it is characterised in that the tilt angled down is 0 degree.
- A kind of 6. vertical beam adjusting apparatus, it is characterised in that including：Computing module, the use is determined for the upward signal according to user equipment and using the steering vector of the affiliated antenna in base station The angle of arrival of family equipment in vertical direction, the angle of arrival is transferred to the first forming vectors module；First forming vectors module, for determining the first forming vectors according to the angle of arrival, by first forming vectors It is transferred to adjusting module；Second forming vectors module, for corresponding forming vectors to be assigned as second under electrical down-tilting angle using the affiliated antenna in base station Shape vector, second forming vectors are transferred to the adjusting module；The adjusting module, assigned for first forming vectors for obtaining the first forming vectors module and described second Vertical beam forming vectors of the product for second forming vectors that shape vector module obtains as the user equipment, utilize The vertical beam forming vectors are adjusted to the user equipment；Wherein, the computing module is specifically used for the steering vector according to the affiliated antenna in the base station, carries out the upper of user equipment Row channel estimation in frequency domain；The up channel estimation in frequency domain is averaging in frequency domain direction, obtains average channel estimation；And it is used for It is each in vertical direction that user equipment is calculated according to the steering vector of the affiliated antenna in the base station and the average channel estimation The performance number of angle；Corresponding angle when selection makes the performance number maximum, obtains angle of arrival.
- 7. device as claimed in claim 6, it is characterised in that described device also includes：Comparison module, wherein,Angle of arrival is further transferred to comparison module by the computing module；The comparison module, for compared with predetermined angle, the angle of arrival to be transferred into the first tax by comparative result Shape vector module；First forming vectors module, for when the angle of arrival is more than the predetermined angle, then by the predetermined angle pair The steering vector answered is as the first forming vectors；When the angle of arrival is less than the predetermined angle, then by the angle of arrival Steering vector corresponding to degree is as the first forming vectors.
- 8. device as claimed in claim 6, it is characterised in thatThe second forming vectors module, be additionally operable to by the affiliated antenna in the base station electrical down-tilting angle be 0 when corresponding figuration Vector is as the second forming vectors.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310453199.9A CN104469803B (en) | 2013-09-25 | 2013-09-25 | A kind of vertical beam method of adjustment and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310453199.9A CN104469803B (en) | 2013-09-25 | 2013-09-25 | A kind of vertical beam method of adjustment and device |
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| CN104469803A CN104469803A (en) | 2015-03-25 |
| CN104469803B true CN104469803B (en) | 2017-12-19 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107017931B (en) * | 2017-03-08 | 2019-11-15 | 京信通信系统（中国）有限公司 | A kind of method and device that beam side lobe inhibits |
| CN109120321B (en) * | 2017-06-22 | 2021-05-11 | 中兴通讯股份有限公司 | Beam forming method, device, base station and computer readable storage medium |
| CN109995411B (en) * | 2019-04-18 | 2022-02-15 | 中国联合网络通信集团有限公司 | Antenna adjusting method and device |
| CN113452426B (en) * | 2020-03-27 | 2023-03-31 | 中国移动通信有限公司研究院 | Signal transmission method, device, network equipment and storage medium |
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| CN102412885A (en) * | 2011-11-25 | 2012-04-11 | 西安电子科技大学 | Three-dimensional beam forming method in LTE |
| CN103141130A (en) * | 2011-01-26 | 2013-06-05 | 阿尔卡特朗讯 | Base station and method of operating a base station |
| CN103152085A (en) * | 2011-12-06 | 2013-06-12 | 中兴通讯股份有限公司 | Weight obtaining method and weight obtaining device of three-dimensional beam forming |
| CN103152093A (en) * | 2011-12-06 | 2013-06-12 | 中兴通讯股份有限公司 | Obtaining method and device of two-dimension arrival angle |
| CN103178886A (en) * | 2011-12-21 | 2013-06-26 | 中兴通讯股份有限公司 | Beam forming method, communication stations and mobile stations |
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- 2013-09-25 CN CN201310453199.9A patent/CN104469803B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103141130A (en) * | 2011-01-26 | 2013-06-05 | 阿尔卡特朗讯 | Base station and method of operating a base station |
| CN102412885A (en) * | 2011-11-25 | 2012-04-11 | 西安电子科技大学 | Three-dimensional beam forming method in LTE |
| CN103152085A (en) * | 2011-12-06 | 2013-06-12 | 中兴通讯股份有限公司 | Weight obtaining method and weight obtaining device of three-dimensional beam forming |
| CN103152093A (en) * | 2011-12-06 | 2013-06-12 | 中兴通讯股份有限公司 | Obtaining method and device of two-dimension arrival angle |
| CN103178886A (en) * | 2011-12-21 | 2013-06-26 | 中兴通讯股份有限公司 | Beam forming method, communication stations and mobile stations |
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