CN101848021A - Method and device for generating broadcast beam weight of intelligent antenna array - Google Patents
Method and device for generating broadcast beam weight of intelligent antenna array Download PDFInfo
- Publication number
- CN101848021A CN101848021A CN200910080152A CN200910080152A CN101848021A CN 101848021 A CN101848021 A CN 101848021A CN 200910080152 A CN200910080152 A CN 200910080152A CN 200910080152 A CN200910080152 A CN 200910080152A CN 101848021 A CN101848021 A CN 101848021A
- Authority
- CN
- China
- Prior art keywords
- antenna array
- array
- determining
- intelligent antenna
- angle
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 50
- 230000004044 response Effects 0.000 claims description 64
- 238000004364 calculation method Methods 0.000 claims description 47
- 238000012545 processing Methods 0.000 claims description 27
- 238000009825 accumulation Methods 0.000 claims description 15
- 125000004122 cyclic group Chemical group 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 description 23
- 238000010586 diagram Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 10
- 238000010295 mobile communication Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 238000013500 data storage Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
The embodiment of the invention discloses a method and a device for generating broadcast beam weight of an intelligent antenna array. The method mainly comprises the following steps of: determining a calculation formula of an array response vector of the intelligent antenna array according to the form of the intelligent antenna array; determining the array response vector of each angle in the preset angle sequence through the calculation formula of the array response vector; and generating the broadcast beam weight of the intelligent antenna array through the array response vector of each angle in the angle sequence. Due to the application of the technical scheme, the method and the device have the advantages of simplifying and unifying the generating process of the broadcast beam weight of the intelligent antenna array, not needing storing the weight data of a plurality of manufacturers largely in the manufacturing and configuring processes of the intelligent antenna, reducing occupied data storage space, reducing the complexity of data design and calculation in the realizing process of the system and improving the efficiency of generating the broadcast beam weight by the system.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for generating a broadcast beam weight of an intelligent antenna array.
Background
With the continuous development of wireless communication technology, limited wireless frequency resources face increasing communication demands, and Smart Antennas (Smart Antennas) can mitigate this contradiction to some extent. The intelligent antenna system can utilize the combination of a plurality of antenna array elements to process signals and automatically adjust a transmitting or receiving directional diagram so as to achieve the best performance aiming at different signal environments. The intelligent antenna array thus produced is a key technology in TD-SCDMA (Time Division-Synchronous Code Division multiple access) system.
The smart antenna is a two-way antenna installed at the site of the base station, acquires directivity through a set of fixed antenna elements with programmable electronic phase relationship, and can simultaneously acquire the directional characteristics of each link between the base station and the mobile station. The initial smart antenna technology is mainly used for radar, sonar, military anti-interference communication, and is used for completing spatial filtering, positioning and the like. In recent years, with the development of mobile communication and the gradual and deep research on aspects of mobile communication radio wave propagation, networking technology, antenna theory and the like, the modern digital signal processing technology is rapidly developed, the processing capacity of a digital signal processing chip is continuously improved, the formation of an antenna beam at a baseband by using the digital technology becomes possible, and the reliability and flexibility of an antenna system are improved. Smart antenna technology is therefore used for mobile communications with complex radio wave propagation environments. In addition, as the number of mobile communication subscribers increases rapidly and the demand for quality of speech increases, mobile communication networks are required to have high voice quality even at high capacity. Therefore, the development of smart antenna technology is also attracting more and more attention.
The principle of the intelligent antenna is to guide the radio signal to a specific direction to generate a space directional beam, so that the main beam of the antenna is aligned with the arrival direction of the user signal DOA (direction of arrival), and the side lobe or null is aligned with the arrival direction of the interference signal, thereby achieving the purposes of fully and efficiently utilizing the mobile user signal and deleting or inhibiting the interference signal. Fig. 1 is a schematic diagram of beam coverage of a smart antenna. Meanwhile, the smart antenna technology utilizes the difference of signal space characteristics among mobile users, and receives and transmits signals of a plurality of mobile users on the same channel through the array antenna technology without mutual interference, so that the utilization of radio frequency spectrum and the transmission of signals are more effective. Under the condition of not increasing the complexity of the system, the intelligent antenna can meet the requirements of service quality and network capacity expansion.
Among them, the estimation of DOA is the basis of smart antenna operation, and is one of the important applications of array signal processing. When a plurality of electromagnetic waves arrive at the antenna array from different directions, each array element is provided with a plurality of signals generated by the electromagnetic waves, and the signals have different phase delay distribution on each array element because of different incidence directions. I.e. at the output of the array is the total superposition of the multiple signals received by each array element. And obtaining corresponding DOA estimation data through matrix operation.
After obtaining an estimate of the DOA, beamforming is an important content of smart antenna operation. The task of beamforming is to form as high a gain as possible in the direction of arrival of the received signal and to suppress the interference signal to the maximum. That is, an optimal combination and allocation of baseband signals are formed according to the system performance index, the main beam is directed to the desired user direction, and the beam null is directed to the interference direction.
For the beam forming of the transmitting antenna, on one hand, the direction information of the received signal is relied on, and on the other hand, the error brought by the difference of the receiving and transmitting frequencies to the direction estimation is considered. Therefore, the forming weight of the beam plays a crucial role as an important parameter for beam forming, and has a great influence on the performance of the smart antenna.
Furthermore, the formed directional diagram of the smart antenna array is classified according to practical application, and can be further divided into three types, namely unit beam, broadcast beam and service beam. The broadcast beam is mainly used for a common channel to perform system broadcast, for example: a primary common control channel (PCCPCH), a secondary common control channel (SCCPCH), a Paging Indicator Channel (PICH), a fast physical random access channel (FPACH), etc. At present, antenna manufacturers respectively provide forming weights of broadcast beams of own intelligent antenna products, and system manufacturers need to respectively store the forming weights of different beam types and different antenna types provided by the manufacturers when equipment is implemented, and meanwhile, the fault-tolerant weights of antennas of different manufacturers when a radio frequency channel fails are also considered. Thus occupying a large amount of memory space and adding significantly to the complexity of the device implementation.
At present, the broadcasting wave beam of the intelligent antenna array is mainly used for a public channel to be used as system broadcasting, most system manufacturers do not produce the intelligent antenna, but the system manufacturers provide the technical specification of the intelligent antenna and then provide the technical specification by the manufacturers of the intelligent antenna. Each manufacturer provides the broadcast beam weight of the manufacturer's smart antenna product when selling the smart antenna product. When implementing the device, system manufacturers need to store the broadcast beam weights of different antenna types and different beam types provided by the manufacturers respectively, and also need to consider the broadcast beam fault-tolerant weights of antennas of different manufacturers when a radio frequency channel fails. Therefore, a large amount of storage space is occupied, complexity brought to equipment implementation is greatly increased, meanwhile, the performance of the intelligent antenna broadcast beam is reduced due to the capacity difference of different manufacturers in the aspect of intelligent antenna algorithm optimization, and the intelligent antenna broadcast beam weight is not further optimized by system equipment manufacturers when the equipment is implemented.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
at present, antenna manufacturers respectively provide forming weights of broadcast beams of own intelligent antenna products, and system manufacturers need to respectively store the forming weights of different beam types and different antenna types provided by the manufacturers when equipment is implemented, and meanwhile, the fault-tolerant weights of antennas of different manufacturers when a radio frequency channel fails are also considered. Thus occupying a large amount of memory space and adding significantly to the complexity of the device implementation.
Disclosure of Invention
The embodiment of the invention provides a method and a device for generating a broadcast beam weight of an intelligent antenna array, which can flexibly configure a broadcast beam according to the external field coverage requirement of the intelligent antenna array.
In order to achieve the above object, an aspect of the embodiments of the present invention provides a method for generating a broadcast beam weight of an intelligent antenna array, which specifically includes the following steps:
determining a calculation formula of an array response vector of the intelligent antenna array according to the array form of the intelligent antenna array;
determining the array response vector of each angle in a preset angle sequence through a calculation formula of the array response vector;
and generating a broadcast beam weight of the intelligent antenna array through the array response vector of each angle in the angle sequence.
Wherein, the calculation formula for determining the array response vector of the intelligent antenna array according to the array form of the intelligent antenna array specifically comprises:
according to the number of antenna array elements in the intelligent antenna array, determining a calculation formula of an array response vector of the intelligent antenna array in a specific direction as follows:
a(θ)＝[a1(θ)a2(θ)…aKa(θ)]，
wherein Ka represents the total number of antenna elements in the intelligent antenna array, theta represents the corresponding angle value of the specific direction in a reference coordinate system where the intelligent antenna array is located, and ai(θ) (i ═ 1, … …, Ka) represents array response parameter values for the ith antenna element in the smart antenna array in a particular direction θ.
Before determining a calculation formula of an array response vector of the smart antenna array according to an array form of the smart antenna array, the method further comprises the following steps:
determining an array response parameter value a of an ith antenna element in the intelligent antenna array in a specific direction thetaiThe formula for the calculation of (θ) is:
further, in the above-mentioned case, <math><mrow><mi>λ</mi><mo>=</mo><mfrac><mi>c</mi><mi>f</mi></mfrac><mo>,</mo></mrow></math>
wherein i represents the serial number of the antenna array elements in the intelligent antenna array, e represents a mathematical constant, j represents an imaginary unit, λ represents a signal wavelength, d represents a physical distance between two adjacent antenna array elements in the intelligent antenna array, c represents a light speed, and f represents a signal frequency.
After determining a calculation formula of an array response vector of the intelligent antenna array according to an array form of the intelligent antenna array, the method further comprises the following steps:
according to the calculation formula of the array response vector of the intelligent antenna array, the calculation formula for determining the shaped weight of the intelligent antenna array in the specific direction theta is as follows:
w(θ)＝aH(θ)＝[a1(θ)a2(θ)…aKa(θ)]H。
the preset angle sequence is generated by the following steps:
and determining the coverage angle range of the broadcast beam of the intelligent antenna array according to the type and the network structure of the intelligent antenna array.
Determining the angle sequence required by the formation of the target beam width according to the coverage angle range of the broadcast beam of the intelligent antenna array:
generating a broadcast beam weight of the intelligent antenna array through the array response vector of each angle in the angle sequence, specifically:
initializing the forming weight value to be wint(θ)＝[0 0 … 0]H；
Determining each angle in the angle sequence according to the array response vector of each angle in the angle sequence
The above corresponding forming weight
According to the formula
(i 1.. N), and the initialized forming weight is respectively compared with the angleAngles in the sequence of degrees
The above corresponding forming weight
Performing N times of cyclic accumulation;
determining the forming weight value generated after the N times of cyclic accumulation is completed, and the forming weight value is the broadcast beam weight value w of the intelligent antenna arrayBCH。
On the other hand, an embodiment of the present invention further provides a device for generating a broadcast beam weight of an intelligent antenna array, which specifically includes:
the first determining module is used for determining a calculation formula of an array response vector of the intelligent antenna array according to the array form of the intelligent antenna array;
the processing module is connected with the first determining module and used for determining the array response vector of each angle in a preset angle sequence through the calculation formula of the array response vector determined by the first determining module;
and the generating module is connected with the processing module, connected with the first determining module and used for generating the broadcast beam weight of the intelligent antenna array through the array response vector of each angle in the angle sequence determined by the processing module.
The first determining module specifically includes:
the quantity obtaining submodule is used for obtaining the quantity of the antenna elements in the intelligent antenna array;
and the determining submodule is connected with the quantity obtaining submodule and used for determining a calculation formula of array response parameter values of the antenna array elements in the intelligent antenna array in a specific direction according to the quantity of the antenna array elements obtained by the quantity obtaining submodule.
Wherein the apparatus further comprises:
and the second determining module is used for determining an angle sequence for generating the broadcast beam weight of the intelligent antenna array.
The second determining module specifically includes:
the information acquisition submodule is used for acquiring the information of the type and the network structure of the intelligent antenna array;
the first determining submodule is connected with the information obtaining submodule and used for determining the coverage angle range of the broadcast beam of the intelligent antenna array according to the type and the network structure of the intelligent antenna array obtained by the information obtaining submodule;
and the second determining submodule is connected with the first determining submodule and is used for determining the angle sequence required by the formation of the target beam width according to the coverage angle range of the broadcast beam of the intelligent antenna array determined by the first determining submodule.
Wherein the apparatus further comprises:
and the third determining module is used for determining a calculation formula of the forming weight of the intelligent antenna array in the specific direction according to the calculation formula of the array response vector of the intelligent antenna array determined by the first determining module.
The generating module specifically includes:
the initialization submodule is used for initializing the forming weight of the intelligent antenna array;
the processing submodule is used for determining a forming weight value corresponding to each angle in the angle sequence according to the array response vector of each angle in the angle sequence determined by the second determining module;
the accumulation submodule is connected with the initial submodule and the processing submodule and is used for circularly accumulating the forming weight initialized by the initial submodule and the corresponding forming weight at each angle in the angle sequence determined by the processing submodule;
and the generation submodule is connected with the accumulation submodule and used for determining a forming weight value generated after all the cyclic accumulation performed by the accumulation submodule is completed as a broadcast beam weight value of the intelligent antenna array.
The technical scheme of the embodiment of the invention has the following advantages that the method and the device for generating the broadcast beam weight of the intelligent antenna array are adopted, so that the generation process of the broadcast beam weight of the intelligent antenna array is simplified and unified, and the weight data of a plurality of manufacturers which cannot be compatible due to non-uniform standards are not required to be stored in a large quantity in the manufacturing and configuration process of the intelligent antenna, thereby achieving the effects of reducing the occupation of data storage space, reducing the data design and operation complexity in the system implementation process and improving the generation efficiency of the broadcast beam weight of the system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of beam coverage of a smart antenna in the prior art;
fig. 2 is a schematic flowchart of a method for generating a broadcast beam weight of an intelligent antenna array according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a six-element intelligent antenna array with antenna elements arranged in a straight line at equal intervals in the embodiment of the invention;
fig. 4 is a schematic structural diagram of an eight-element intelligent antenna array with equally spaced antenna elements arranged on the circumference of the antenna array element in the embodiment of the present invention;
fig. 5 is a schematic flowchart of a method for generating a broadcast beam weight of an intelligent antenna array according to a second embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an eight-element directional intelligent antenna array according to an embodiment of the present invention;
fig. 7 is a broadcast beam forming directional diagram obtained after the forming weight processing in the embodiment of the present invention;
fig. 8 is a schematic structural diagram of an apparatus for generating a broadcast beam weight of an intelligent antenna array according to an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, a schematic flow chart of a method for generating a broadcast beam weight of an intelligent antenna array according to an embodiment of the present invention specifically includes the following steps:
step S201, determining a calculation formula of an array response vector of the intelligent antenna array according to the array form of the intelligent antenna array.
And the method further comprises a calculation formula for determining the array response vector of each antenna element in the intelligent antenna array in a specific direction.
Further, after the calculation formula of the array response vector is determined in the step, a calculation formula of a shaped weight of the smart antenna array in the specific direction is also determined.
Step S202, determining the array response vector of each angle in the preset angle sequence through a calculation formula of the array response vector.
Specifically, each angle value in the angle sequence is respectively substituted into the calculation formula of the array response vector to obtain an array response vector value corresponding to each angle.
Further, the preset angle sequence is a specific parameter set for determining a broadcast beam weight for generating the smart antenna array, and is generated by the following steps:
determining the coverage angle range of the broadcast wave beam of the intelligent antenna array according to the type and the network structure of the intelligent antenna array;
after the coverage angle range is determined, a plurality of directional angles required for forming different beam widths are selected to form a corresponding angle sequence within the angle range according to the requirements of the network topology structure.
In a specific physical implementation process, the number of specifically selected angles in the angle sequence and the size of each angle may be adjusted according to specific network structure requirements, and such changes do not affect the protection scope of the present invention.
It should be further noted that there is no necessary sequence between the determining process of the calculation formula of the array response vector of the smart antenna array described in step S201 and the above-mentioned process of generating the preset angle sequence, and the two processes respectively provide information of the operation rule and the parameter for the subsequent step S203, so that the sequence described in the above-mentioned two processes and the numbers corresponding to the two processes are only identifiers for convenience of description, and do not represent the sequence, and which process is preferentially executed has no influence on the protection scope of the present invention.
And step S203, generating the broadcast beam weight of the intelligent antenna array through the array response vector of each angle in the angle sequence.
Initializing the numerical value of the shaped weight, determining the corresponding shaped weight through the array response vector of each angle, circularly accumulating the shaped weight of each angle on the initialized shaped weight in sequence, and determining all the accumulated shaped weights as the broadcast beam weight of the intelligent antenna array.
The technical scheme of the embodiment of the invention has the following advantages that the generation process of the broadcast beam weight in the intelligent antenna array is simplified and unified due to the adoption of the method for generating the broadcast beam weight of the intelligent antenna array, and the weight data of a plurality of manufacturers which cannot be compatible due to non-uniform standards are not required to be stored in a large quantity in the manufacturing and configuration processes of the intelligent antenna, so that the effects of reducing the occupation of data storage space, reducing the data design and operation complexity in the system implementation process and improving the efficiency of generating the broadcast beam weight by the system are achieved.
In order to further explain the technical solution of the method for generating the broadcast beam weight of the smart antenna array according to the embodiment of the present invention, the following embodiments of the present invention describe the above technical solution with reference to specific implementation scenarios.
The intelligent antenna is an adaptive array antenna, and the basic principle is that the spatial characteristics of signal transmission are utilized, and the weight of a transmitted signal on each array element is adjusted to strengthen the wave beam in the effective signal direction, so that the purposes of suppressing interference and improving the signal-to-interference ratio are achieved. The intelligent antenna technology has the advantages of improving system capacity and frequency spectrum efficiency, reducing system interference, expanding the coverage range of the system and the like.
The smart antenna may be classified into an omni-directional smart antenna array and a directional smart antenna array according to types. The omnidirectional intelligent antenna array has low gain and indiscriminate reception of various signals, so that the communication quality is greatly reduced. The fixed-point wireless communication adopts the directional intelligent antenna array, thereby greatly improving the communication quality. In the public communication network base station and the private mobile communication network facing a plurality of mobile users, the antenna (intelligent antenna) with variable antenna pointing directions (namely wave beams) is adopted, so that the communication quality of mobile communication can be greatly improved.
In the embodiment of the present invention, a directional smart antenna array is mainly used as an example for description, but after the specific value range of the relevant parameter is adjusted, the omnidirectional smart antenna array is also applicable to the method proposed in the embodiment of the present invention, and such a change does not affect the protection scope of the present invention.
On the other hand, the basic working principle of the smart antenna is to arrange antenna elements with the same polarization characteristic, isotropy and gain in a certain way to form an antenna array, i.e. a smart antenna array. The array elements forming the array may be arranged in any manner, typically linearly equidistant, circumferentially equidistant or planar equidistant, at a pitch typically half the operating wavelength and in the same orientation.
As shown in fig. 3 and 4, the antenna array elements are a six-element smart antenna array with straight lines and equidistant arrangement and an eight-element smart antenna array with circumferential antenna elements and equidistant arrangement, respectively, in the two figures, each dot represents an antenna element. Thus, the spatial arrangement mode of the antenna array elements is changed, and the protection scope of the invention is not influenced.
The second embodiment of the invention provides a method for generating a broadcast beam weight of an intelligent antenna array, which can flexibly configure a broadcast beam according to the requirement of external field coverage. As shown in fig. 5, a schematic flow chart of a method for generating a broadcast beam weight of an intelligent antenna array according to a second embodiment of the present invention specifically includes the following steps:
step S501, a determination formula of the response vector a (θ) is determined.
For a smart antenna array with the number of antennas Ka, the array response vector corresponding to a particular direction θ is calculated by the following response vector determination equation (1):
a(θ)＝[a1(θ)a2(θ)…aKa(θ)] (1)
wherein Ka represents the total number of antenna elements in the current intelligent antenna array;
theta represents the corresponding angle value of the specific direction in the reference coordinate system where the current intelligent antenna array is located;
ai(θ) (i ═ 1, … …, Ka) represents the array response parameter value for the ith antenna element in a particular direction θ in current smart antenna arrays.
Specifically, for the directional smart antenna array shown in fig. 6, each matrix element in the response vector determination formula (1) is specifically calculated by the following formula:
wherein e is a mathematical constant, and the specific numerical value is 2.71828182.;
j is an imaginary unit;
λ is the signal wavelength;
d is a physical distance between two adjacent array elements, and in a specific physical practical process, the physical distance d is generally set to be a half wavelength of a signal, but other numerical values also belong to the protection range of the invention;
c is the speed of light;
f is the signal frequency.
And step s502, determining a calculation formula of the forming weight w (theta) in the specific direction.
According to the formula (1) and the formula (2), the weight value shaped for the specific direction θ can be further calculated by the following formula:
w(θ)＝aH(θ)＝[a1(θ)a2(θ)…aKa(θ)]H (3)
as can be seen from the above formula (3), the shaped weight w (θ) in the specific direction θ is specifically a conjugate matrix of the response vector a (θ), and is identified by the corner mark H.
It should be further noted that w (θ) calculated by the above formula (3) is a forming weight of a beam in a specific direction θ, that is, a forming weight of a service beam in the specific direction θ of the smart antenna array currently.
The service beam parameters are different under the conditions of a directional intelligent antenna array and an omnidirectional intelligent antenna array, wherein the former covers 120-degree airspace, and the latter covers 360-degree airspace.
Step S503, determining the coverage angle range theta of the current intelligent antenna arrayBCH。
Determining the coverage range of the intelligent antenna array according to the type (such as omnidirectional intelligent antenna array and directional intelligent antenna array) and the network structure of the intelligent antenna array, namely determining the coverage angle theta of the intelligent antenna arrayBCHThe value range of (a).
Wherein, the specific angle theta in the formula (1), the formula (2) and the formula (3) and the coverage angle theta of the smart antenna arrayBCHThe relationship between them is as follows:
θ∈θBCH
in a specific implementation scenario, if the current smart antenna array is an omnidirectional smart antenna array, the coverage angle θ isBCHThe value range is as follows:
θBCH＝[-π，π]；
if the antenna array is a three-sector intelligent antenna array and the current intelligent antenna array is an omnidirectional intelligent antenna array, the coverage angle theta is largerBCHThe value range is as follows:
step S504, determining an angle sequence thetaorder。
Planning the directional angle sequence theta needed for forming different beam widths according to the requirements of the network topologyorder。
Specifically, the angle sequence is calculated in the manner of
Wherein, thetaorderThe sequence has N angles, and the specific value of the parameter N can be set according to the requirement of the network topology structure.
Further, the angular sequence θorderEach matrix element θ in (b)orderTheta with respect to the aboveBCHThe relationship that exists between:
wherein,
(i-1, … …, N) represents the angle sequence θorderMatrix element with sequence number i in (1).
From this, the angular sequence θorderThe number of angle elements contained in (a) is at θBCHThe value range of the present invention is determined according to the specific network topology and the calculation accuracy requirement, and the specific value of the N value does not affect the protection range of the present invention.
It should be further noted that, steps S501 and S502 describe the flow of determining the calculation formula of the array response vector of the smart antenna array and the calculation formula of the shaped weight in the specific direction, and steps S503 and S504 are the flow of generating the preset angle sequence, and the two flows do not have a necessary sequence, but only provide the information of the operation rule and the parameter for the subsequent step S505, so that the sequence described in the above two flows and the numbers corresponding to the two flows are only marks for convenience of description, and do not represent the sequence, and which flow is preferentially executed has no influence on the protection scope of the present invention.
Step S505, a forming weight w (θ) is initialized.
That is, the value w (theta) corresponding to the broadcast beam forming weight of the intelligent antenna array is initialized to wint(θ)＝[0 0…0]H。
Step S506, calculating an angle sequence thetaorderAngle ofThe corresponding weight value
The specific operation process is based on the aboveThe calculation formula of the forming weight w (θ) in the specific direction determined in step S502 is performed, wherein the value of θ is determined according to the angle sequence θ determined in step S504orderTo make the selection.
That is, θ is calculated according to the calculation formula of the shaped weight w (θ) in the specific directionorderAngle of
And the forming weight value w (theta) in the corresponding direction.
Step S507, figuration weight result obtained by calculation
With the current forming weight wintAnd (theta) accumulating.
Step S508, judging the currently calculated angle
In the angular sequence thetaorderWhether the serial number i in (1) is equal to thetaorderThe total number of angles N.
When in use
Is not equal to thetaorderIf the total number of angles N is less than N, step S506 is executed to calculate a weight corresponding to the next angle value;
when in use
Is equal to thetaorderWhen the total number N of angles is smaller than the predetermined value, step S509 is executed, and the loop ends.
Step S509, determining the current weight calculation result as the broadcast beam weight.
The weight of the obtained required broadcast beam is: w is aBCH＝wint。
It should be further noted that, in the above description of the embodiments of the present invention, the letter identifiers or parameters used are selected based on the existing writing habits or common rules of those skilled in the art, and each of the letter identifiers or parameters represents a specific technical meaning, and on this basis, other changes made based on the technical ideas proposed by the embodiments of the present invention and other changes made by replacing the letter identifiers or parameters based on the same technical meaning also belong to the protection scope of the present invention.
The technical scheme of the embodiment of the invention has the following advantages that the generation process of the broadcast beam weight in the intelligent antenna array is simplified and unified due to the adoption of the method for generating the broadcast beam weight of the intelligent antenna array, and the weight data of a plurality of manufacturers which cannot be compatible due to non-uniform standards are not required to be stored in a large quantity in the manufacturing and configuration processes of the intelligent antenna, so that the effects of reducing the occupation of data storage space, reducing the data design and operation complexity in the system implementation process and improving the efficiency of generating the broadcast beam weight by the system are achieved.
For further convenience of explanation, on the basis of the above technical solutions, the embodiments of the present invention further provide an angle sequence θorderSince the smart antenna array in many cases has high efficiency based on the symmetry of the radio paths of the uplink and downlink (the radio environment and the transmission conditions are the same), the angle selection in this selection example is also based on the symmetry principle, as shown below, the angle sequence in the three-sector smart antenna array (i.e. the directional smart antenna array)And selecting an example, wherein the angle values are symmetrical relative to the angle 0 according to a symmetrical selection principle.
Angular sequence thetaorderThe specific values are as follows:
θorder＝[-60 -46.5 -33 -28.875 -24.75 -20.625 -16.5 -12.375-8.25 -4.125 0 4.125 8.25 12.375 16.5 20.625 24.75 28.875 3346.5 60]。
further, based on the selection of the angle sequence, a corresponding broadcast beam forming directional diagram obtained after the forming weight obtained by the technical scheme provided by the embodiment of the invention is processed is shown in fig. 7. After the broadcast beam is shaped, the broadcast beam strength in the range from +60 degrees to-60 degrees is obviously improved, a main beam is formed, and the other angles are correspondingly weakened, so that the interference of signals in the other angles on the main beam is avoided, and the signal receiving function of the intelligent antenna array can be better realized.
It should be noted that the broadcast beam parameters are different between the directional smart antenna array and the omnidirectional smart antenna array: the directional intelligent antenna array is divided into horizontal plane half-power beam width, broadcast beam gain and power level reduction of the beam at the +/-60-degree edge; the omnidirectional intelligent antenna array is divided into average gain of broadcast beams and roundness index of a horizontal plane directional diagram.
Correspondingly, the broadcast Beam forming directional diagram shown in fig. 7 is specifically a schematic diagram of horizontal Half Power Beam Width (HPBW) in a directional smart antenna array state.
It should be further noted that the above-mentioned angle sequence value is only a preferred embodiment of the present invention, and in the case of different wireless environments and transmission conditions, or special design requirements for network structure, the above-mentioned angle sequence θ is used for determining the transmission power of the wireless communication systemorderIt is also possible to choose an asymmetrical angle value, and such an adjustment is also within the scope of the invention.
Corresponding to the method for generating a broadcast beam weight of an intelligent antenna array proposed by the embodiment of the present invention, the embodiment of the present invention further provides a device for generating a broadcast beam weight of an intelligent antenna array, a schematic structural diagram of which is shown in fig. 8, and the method specifically includes:
the first determining module 81 is configured to determine a calculation formula of an array response vector of the smart antenna array according to an array format of the smart antenna array, and specifically includes:
the quantity obtaining submodule 811 is used for obtaining the quantity of antenna elements in the intelligent antenna array;
the determining submodule 812 is connected to the number obtaining submodule 811, and is configured to determine a calculation formula of array response parameter values of the antenna elements in the smart antenna array in a specific direction according to the number of the antenna elements obtained by the number obtaining submodule 811.
The processing module 82 is connected to the first determining module 81, and is configured to determine an array response vector of each angle in the preset angle sequence through a calculation formula of the array response vector determined by the first determining module 81;
the generating module 83, connected to the processing module 82, is configured to generate a broadcast beam weight of the smart antenna array through the array response vector of each angle in the angle sequence determined by the processing module 82, and specifically includes:
an initial sub-module 831, configured to initialize a forming weight of the smart antenna array;
the processing submodule 832 is configured to determine a shaped weight corresponding to each angle in the angle sequence according to the array response vector of each angle in the preset angle sequence;
an accumulation submodule 833, connected to the initial submodule 831 and the processing submodule 832, for performing cyclic accumulation on the forming weight initialized by the initial submodule 831 and the forming weight corresponding to each angle in the angle sequence determined by the processing submodule 832;
the generating sub-module 834 is connected to the accumulating sub-module 833 and configured to determine a forming weight generated after all the cyclic accumulation performed by the accumulating sub-module 833 is completed, where the forming weight is a broadcast beam weight of the smart antenna array.
Further, the above apparatus further comprises:
a second determining module 84, connected to the processing module 82, configured to generate the preset angle sequence, that is, an angle sequence for determining a broadcast beam weight of the smart antenna array, where the module specifically includes:
the information acquisition submodule 841 is used for acquiring the information of the type and the network structure of the intelligent antenna array;
the first determining submodule 842, connected to the information obtaining submodule 841, is configured to determine, according to the type and network structure of the smart antenna array obtained by the information obtaining submodule 841, a coverage angle range of a broadcast beam of the smart antenna array;
the second determining submodule 843 is connected to the first determining submodule 842, and is configured to determine an angle sequence required for forming a target beam width according to the coverage angle range of the broadcast beam of the smart antenna array determined by the first determining submodule 842.
Further, the above apparatus further comprises:
the third determining module 85 is connected to the first determining module 81, and is configured to determine a calculation formula of a forming weight of the smart antenna array in a specific direction according to the calculation formula of the array response vector of the smart antenna array determined by the first determining module 81, and then provide the calculation formula to the processing module 82 for subsequent processing.
The modules may be distributed in one device or may be distributed in a plurality of devices.
The modules can be combined into one module, and can also be further split into a plurality of sub-modules.
The technical scheme of the embodiment of the invention has the following advantages that the generation device of the broadcast beam weight of the intelligent antenna array is adopted, so that the generation process of the broadcast beam weight in the intelligent antenna array is simplified and unified, and in the manufacturing and configuration process of the intelligent antenna, a large amount of weight data of a plurality of manufacturers which cannot be compatible due to non-uniform standards is not required to be stored, thereby achieving the effects of reducing the occupation of data storage space, reducing the complexity of data design and operation in the system implementation process and improving the efficiency of generating the broadcast beam weight by the system.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by hardware, or by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred embodiment and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, and may be correspondingly changed in one or more devices different from the embodiments. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
Claims (12)
1. A method for generating a broadcast beam weight of an intelligent antenna array is characterized by comprising the following steps:
determining a calculation formula of an array response vector of the intelligent antenna array according to the array form of the intelligent antenna array;
determining the array response vector of each angle in a preset angle sequence through a calculation formula of the array response vector;
and generating a broadcast beam weight of the intelligent antenna array through the array response vector of each angle in the angle sequence.
2. The method of claim 1, wherein the determining a calculation formula of an array response vector of the smart antenna array according to an array form of the smart antenna array is specifically:
according to the number of antenna array elements in the intelligent antenna array, determining a calculation formula of an array response vector of the intelligent antenna array in a specific direction as follows:
a(θ)＝[a1(θ)a2(θ)…aKa(θ)]，
wherein Ka represents the total number of antenna elements in the intelligent antenna array, theta represents the corresponding angle value of the specific direction in a reference coordinate system where the intelligent antenna array is located, and ai(θ) (i ═ 1, … …, Ka) represents array response parameter values for the ith antenna element in the smart antenna array in a particular direction θ.
3. The method of claim 2, wherein before determining the formula for calculating the array response vector of the smart antenna array based on the array form of the smart antenna array, further comprising:
determining an array response parameter value a of an ith antenna element in the intelligent antenna array in a specific direction thetaiThe formula for the calculation of (θ) is:
further, in the above-mentioned case, <math><mrow><mi>λ</mi><mo>=</mo><mfrac><mi>c</mi><mi>f</mi></mfrac><mo>,</mo></mrow></math>
wherein i represents the serial number of the antenna array elements in the intelligent antenna array, e represents a mathematical constant, j represents an imaginary unit, λ represents a signal wavelength, d represents a physical distance between two adjacent antenna array elements in the intelligent antenna array, c represents a light speed, and f represents a signal frequency.
4. The method of claim 2, wherein after determining the formula for calculating the array response vector of the smart antenna array based on the array format of the smart antenna array, further comprising:
according to the calculation formula of the array response vector of the intelligent antenna array, the calculation formula for determining the shaped weight of the intelligent antenna array in the specific direction theta is as follows:
w(θ)＝aH(θ)＝[a1(θ)a2(θ)…aKa(θ)]H。
5. the method of claim 1, wherein the predetermined sequence of angles is generated by:
determining the coverage angle range of the broadcast wave beam of the intelligent antenna array according to the type and the network structure of the intelligent antenna array;
determining the angle sequence required by the formation of the target beam width according to the coverage angle range of the broadcast beam of the intelligent antenna array:
6. the method according to claim 1, 4 or 5, wherein the generating of the broadcast beam weight of the smart antenna array through the array response vector of each angle in the angle sequence specifically comprises:
initializing the forming weight value to be wint(θ)＝[0 0…0]H；
Determining each angle in the angle sequence according to the array response vector of each angle in the angle sequence
The above corresponding forming weight
According to the formula
(i 1.. N), and the initialized forming weight is respectively matched with each angle in the angle sequence
The above corresponding forming weight
Performing N times of cyclic accumulation;
determining the forming weight value generated after the N times of cyclic accumulation is completed, and the forming weight value is the broadcast beam weight value w of the intelligent antenna arrayBCH。
7. A generating device of broadcast beam weight of an intelligent antenna array is characterized by comprising:
the first determining module is used for determining a calculation formula of an array response vector of the intelligent antenna array according to the array form of the intelligent antenna array;
the processing module is connected with the first determining module and used for determining the array response vector of each angle in a preset angle sequence through the calculation formula of the array response vector determined by the first determining module;
and the generating module is connected with the processing module and used for generating the broadcast beam weight of the intelligent antenna array through the array response vector of each angle in the angle sequence determined by the processing module.
8. The apparatus of claim 7, wherein the first determining module specifically comprises:
the quantity obtaining submodule is used for obtaining the quantity of the antenna elements in the intelligent antenna array;
and the determining submodule is connected with the quantity obtaining submodule and used for determining a calculation formula of array response parameter values of the antenna array elements in the intelligent antenna array in a specific direction according to the quantity of the antenna array elements obtained by the quantity obtaining submodule.
9. The apparatus of claim 7, further comprising:
and the second determining module is connected with the processing determining module and is used for determining an angle sequence for generating the broadcast beam weight of the intelligent antenna array.
10. The apparatus of claim 9, wherein the second determining module specifically comprises:
the information acquisition submodule is used for acquiring the information of the type and the network structure of the intelligent antenna array;
the first determining submodule is connected with the information obtaining submodule and used for determining the coverage angle range of the broadcast beam of the intelligent antenna array according to the type and the network structure of the intelligent antenna array obtained by the information obtaining submodule;
and the second determining submodule is connected with the first determining submodule and is used for determining the angle sequence required by the formation of the target beam width according to the coverage angle range of the broadcast beam of the intelligent antenna array determined by the first determining submodule.
11. The apparatus of claim 7, further comprising:
and the third determining module is connected with the first determining module and used for determining a calculation formula of the shaped weight of the intelligent antenna array in the specific direction according to the calculation formula of the array response vector of the intelligent antenna array determined by the first determining module.
12. The apparatus according to any one of claims 7 to 11, wherein the generating module specifically includes:
the initialization submodule is used for initializing the forming weight of the intelligent antenna array;
the processing submodule is used for determining a forming weight value corresponding to each angle in the angle sequence according to the array response vector of each angle in the angle sequence determined by the second determining module;
the accumulation submodule is connected with the initial submodule and the processing submodule and is used for circularly accumulating the forming weight initialized by the initial submodule and the corresponding forming weight at each angle in the angle sequence determined by the processing submodule;
and the generation submodule is connected with the accumulation submodule and used for determining a forming weight value generated after all the cyclic accumulation performed by the accumulation submodule is completed as a broadcast beam weight value of the intelligent antenna array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910080152 CN101848021B (en) | 2009-03-24 | 2009-03-24 | Method and device for generating broadcast beam weight of intelligent antenna array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910080152 CN101848021B (en) | 2009-03-24 | 2009-03-24 | Method and device for generating broadcast beam weight of intelligent antenna array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101848021A true CN101848021A (en) | 2010-09-29 |
| CN101848021B CN101848021B (en) | 2013-02-20 |
Family
ID=42772496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910080152 Active CN101848021B (en) | 2009-03-24 | 2009-03-24 | Method and device for generating broadcast beam weight of intelligent antenna array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101848021B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051365A (en) * | 2012-12-21 | 2013-04-17 | 大唐移动通信设备有限公司 | Beam shaping method and device |
| CN103326765A (en) * | 2012-03-20 | 2013-09-25 | 电信科学技术研究院 | Method and device for double-current wave beam shaping |
| CN103809042A (en) * | 2012-11-07 | 2014-05-21 | 中国移动通信集团湖北有限公司 | Intelligent antenna outfield test method and system thereof |
| CN103840872A (en) * | 2014-03-07 | 2014-06-04 | 华为技术有限公司 | Device and method for generating weight of antenna and maintenance management device |
| CN105099534A (en) * | 2015-08-22 | 2015-11-25 | 西安电子科技大学 | Positioning information assistance-based massive multi-input multi-output beamforming method |
| CN105812044A (en) * | 2014-12-31 | 2016-07-27 | 电信科学技术研究院 | Double current beamforming method and device |
| CN106372387A (en) * | 2016-08-24 | 2017-02-01 | 重庆大学 | Method and apparatus for obtaining antenna signal |
| WO2018205252A1 (en) * | 2017-05-12 | 2018-11-15 | 华为技术有限公司 | Method and apparatus for determining broadcast beam weight in wireless communication system |
| WO2019052420A1 (en) * | 2017-09-13 | 2019-03-21 | 索尼公司 | Electronic device and communication method |
| WO2019100244A1 (en) * | 2017-11-22 | 2019-05-31 | 华为技术有限公司 | Beam allocation method and apparatus |
| WO2020015379A1 (en) * | 2018-07-16 | 2020-01-23 | 中兴通讯股份有限公司 | Broadcast beam weight determination method and device, network element, and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT1571730E (en) * | 2002-10-30 | 2012-05-22 | Zte Corp | Conversion method of transmitting and receiving weighting value in the intelligent antenna system |
| CN101072066B (en) * | 2006-05-08 | 2011-05-11 | 中兴通讯股份有限公司 | Intelligent antenna realizing method for CDMA communication system |
| CN101145818A (en) * | 2006-09-12 | 2008-03-19 | 中兴通讯股份有限公司 | A broadcast wave bundle shaping method for smart antenna system |
| CN101170338A (en) * | 2006-10-26 | 2008-04-30 | 中兴通讯股份有限公司 | Implementation device for dynamic section broadcast bundle forming |
| CN101267236B (en) * | 2007-03-16 | 2013-02-27 | 中兴通讯股份有限公司 | A smart antenna downlink wave bundle shaping method and its device |
-
2009
- 2009-03-24 CN CN 200910080152 patent/CN101848021B/en active Active
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326765A (en) * | 2012-03-20 | 2013-09-25 | 电信科学技术研究院 | Method and device for double-current wave beam shaping |
| WO2013139163A1 (en) * | 2012-03-20 | 2013-09-26 | 电信科学技术研究院 | Double-stream beamforming method and device |
| US9197295B2 (en) | 2012-03-20 | 2015-11-24 | China Academy Of Telecommunications Technology | Double-stream beamforming method and device |
| CN103809042A (en) * | 2012-11-07 | 2014-05-21 | 中国移动通信集团湖北有限公司 | Intelligent antenna outfield test method and system thereof |
| CN103809042B (en) * | 2012-11-07 | 2016-12-21 | 中国移动通信集团湖北有限公司 | A kind of smart antenna field testing method and system |
| CN103051365B (en) * | 2012-12-21 | 2015-07-15 | 大唐移动通信设备有限公司 | Beam shaping method and device |
| CN103051365A (en) * | 2012-12-21 | 2013-04-17 | 大唐移动通信设备有限公司 | Beam shaping method and device |
| CN103840872A (en) * | 2014-03-07 | 2014-06-04 | 华为技术有限公司 | Device and method for generating weight of antenna and maintenance management device |
| CN103840872B (en) * | 2014-03-07 | 2017-06-06 | 华为技术有限公司 | Generate device, method and the maintenance management equipment of the weights of antenna |
| CN105812044B (en) * | 2014-12-31 | 2019-01-08 | 电信科学技术研究院 | A kind of dual-stream beamforming method and device |
| CN105812044A (en) * | 2014-12-31 | 2016-07-27 | 电信科学技术研究院 | Double current beamforming method and device |
| CN105099534A (en) * | 2015-08-22 | 2015-11-25 | 西安电子科技大学 | Positioning information assistance-based massive multi-input multi-output beamforming method |
| CN106372387A (en) * | 2016-08-24 | 2017-02-01 | 重庆大学 | Method and apparatus for obtaining antenna signal |
| CN106372387B (en) * | 2016-08-24 | 2019-04-02 | 重庆大学 | A kind of acquisition methods and device of aerial signal |
| WO2018205252A1 (en) * | 2017-05-12 | 2018-11-15 | 华为技术有限公司 | Method and apparatus for determining broadcast beam weight in wireless communication system |
| US11108477B2 (en) | 2017-05-12 | 2021-08-31 | Huawei Technologies Co., Ltd. | Method and apparatus for determining broadcast beam weighted value in wireless communications system |
| WO2019052420A1 (en) * | 2017-09-13 | 2019-03-21 | 索尼公司 | Electronic device and communication method |
| US11290159B2 (en) | 2017-09-13 | 2022-03-29 | Sony Corporation | Electronic device and communication method |
| WO2019100244A1 (en) * | 2017-11-22 | 2019-05-31 | 华为技术有限公司 | Beam allocation method and apparatus |
| US11349540B2 (en) | 2017-11-22 | 2022-05-31 | Huawei Technologies Co., Ltd. | Beam allocation method and apparatus |
| WO2020015379A1 (en) * | 2018-07-16 | 2020-01-23 | 中兴通讯股份有限公司 | Broadcast beam weight determination method and device, network element, and storage medium |
| US11804915B2 (en) | 2018-07-16 | 2023-10-31 | Zte Corporation | Broadcast beam weight determination method and device, network element, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101848021B (en) | 2013-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101848021A (en) | Method and device for generating broadcast beam weight of intelligent antenna array | |
| US6795018B2 (en) | Smart antenna arrays | |
| US9270022B2 (en) | Method, apparatus and system of antenna array dynamic configuration | |
| US7079868B2 (en) | Smart antenna arrays | |
| CN100401829C (en) | Sequentially transmitting downlink broadcasts from a communication station with an antenna array | |
| US9629000B2 (en) | Methods and apparatus for antenna elevation design | |
| KR20050004605A (en) | Combined beamforming-diversity wireless fading channel de-modulator using sub-array grouped adaptive array antennas, portable telecommunication receiving system comprising it and method thereof | |
| US11276941B2 (en) | Broadband antenna | |
| US10249961B2 (en) | Transmit device and method thereof | |
| Swales et al. | Multi-beam adaptive base-station antennas for cellular land mobile radio systems | |
| Liu et al. | Performance analysis of IRS-assisted networks with product-distance | |
| CN114499718B (en) | A beamforming method and device | |
| Meng et al. | Co‐Channel Coexistence Analysis between 5G IoT System and Fixed‐Satellite Service at 40 GHz | |
| Choi et al. | Coverage Analysis for Downlink Satellite Networks: Effect of Shadowing | |
| CN100442905C (en) | Smart antenna beamforming method and device for group coverage | |
| US20170237162A1 (en) | Wireless communication device and antenna arrangement method | |
| CN102623802B (en) | Method for optimizing size of four-transmitting two-receiving antenna array to obtain maximum average channel capacity | |
| CN119366158A (en) | Array antenna and method for manufacturing the same | |
| Chau et al. | Directional hub slotted aloha medium access control protocol for wireless sensor networks with directional antennas | |
| CN101340220B (en) | Time slot distribution method and apparatus based on adaptive wave beam shaping | |
| Lian et al. | Green communications and positioning by integration of adaptive and distributed beam-forming technologies in cognitive radio systems | |
| Xu et al. | On the connectivity of wireless networks with multiple directional antennas | |
| Kumar et al. | Design of weighted circular array for 5G applications with fixed beam forming | |
| US20250055523A1 (en) | Array grouping–based communication method and communication apparatus | |
| Ochiai et al. | Collaborative beamforming |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |