CN113098536A - Communication emission system based on reconfigurable holographic super surface and communication optimization method - Google Patents
Communication emission system based on reconfigurable holographic super surface and communication optimization method Download PDFInfo
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- H—ELECTRICITY
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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Abstract
The invention provides a communication emission system and a communication optimization method based on a reconfigurable holographic super surface. The communication optimization method of the communication transmitting system based on the reconfigurable holographic super surface can enable the communication transmitting system based on the reconfigurable holographic super surface to obtain an optimal digital beam forming scheme and an optimal holographic beam forming scheme which enable the total data rate of all users to reach the maximum value, so that transmitted signals are processed according to the optimal digital beam forming scheme and the optimal holographic beam forming scheme, and the total data rate of all users reaches the maximum value.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a communication transmitting system and a communication optimizing method based on a reconfigurable holographic super surface.
Background
In order to implement ubiquitous intelligent information networks, the upcoming sixth generation (6G) wireless communications put stringent requirements on antenna technology, such as capacity enhancements and low power hardware components. Among the existing antenna technologies, the holographic antenna is a small-sized, low-power-consumption planar antenna, and is receiving increasing attention due to its multi-beam control capability with low manufacturing cost and low hardware cost. Specifically, the holographic antenna uses a metal patch to construct a holographic pattern on the surface, and records the interference between a reference wave and a target wave according to the interference principle. The radiation characteristics of the reference wave can then be varied by means of the holographic pattern to produce the desired radiation direction.
However, as mobile devices have increased explosively, conventional holographic antennas have presented significant challenges because once the holographic pattern is established, the radiation pattern of the conventional holographic antenna is fixed and thus cannot meet the requirements of mobile communications.
In the related art, the design and radiation direction control of the RHS (Reconfigurable holographic super surface) hardware component are mainly focused, and compared with the traditional dish antenna and phased array antenna, the RHS can realize dynamic beam forming without a heavy mechanical movement device and a complex phase shift circuit, so that the manufacturing cost and power loss of the antenna can be greatly saved, and meanwhile, the light and thin structure is very convenient to install. However, most studies only demonstrate the feasibility of RHS to achieve dynamic multi-beam control. At present, no work is done to study the influence of a transmitting device and a holographic beam forming scheme of multi-user communication under the assistance of RHS on the performance of a communication system.
Disclosure of Invention
The embodiment of the invention provides a method for calculating a maximum limit value of the torque of a finished vehicle wheel end, aiming at calculating the maximum limit value of the torque of the finished vehicle wheel end according to a specific mode to obtain a more accurate maximum limit value of the torque of the finished vehicle wheel end.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a communication transmitting system based on a reconfigurable holographic super surface, including:
a beam pointing determination module for determining a direction in which to transmit a beam;
the digital beam forming module is connected with the beam pointing determining module and used for preprocessing the transmitting signals and eliminating the interference between the signals transmitted to different users;
the reconfigurable holographic super surface is connected with the digital beam forming module and is used for carrying out holographic beam forming, specifically, the metamaterial radiation units on the reconfigurable holographic super surface can continuously adjust the radiation amplitude of the electromagnetic waves transmitted to each metamaterial radiation unit by continuously changing the bias voltage of each power supply, so that each radiation unit radiates electromagnetic waves with different energy and finally superposes the electromagnetic waves with continuously adjustable directions;
and the bias voltage control module is connected with the reconfigurable holographic super surface and is used for presetting the adjustment interval of the bias voltage and adjusting the radiation amplitude of the electromagnetic waves radiated on each super surface unit on the reconfigurable holographic super surface according to the preset adjustment interval of the bias voltage.
Optionally, the reconfigurable holographic meta-surface comprises a feed source, a parallel plate waveguide and the metamaterial radiation unit;
the metamaterial radiation unit array is arranged on the surface of the parallel plate waveguide;
the feed sources are multiple and connected among gaps of the metamaterial radiation units on the surfaces of the parallel plate waveguides.
Optionally, the metamaterial radiation unit includes a ground layer, a dielectric layer, a first patch layer, a second patch layer, and a varactor;
the grounding layer is connected to the bottom of the dielectric layer, and the first patch layer and the second patch layer are arranged on the dielectric layer;
the first patch layer and the second patch layer are connected through the variable capacitance diode, the first patch layer is connected with the ground layer, and the second patch layer is connected with electricity.
In a second aspect, an embodiment of the present invention provides a communication optimization method for a reconfigurable holographic super surface-based communication emission system, where the method includes:
initializing the radiation amplitude of each metamaterial radiation unit to obtain an initial holographic beam forming scheme;
obtaining an initial digital beam forming scheme according to the initial holographic beam forming scheme;
obtaining an optimized holographic beam forming scheme according to the initial digital beam forming scheme;
optimizing the initial digital beam forming scheme according to the optimized holographic beam forming scheme to obtain an optimized digital beam forming scheme;
and mutually iterating and optimizing the optimized digital beam forming scheme and the optimized holographic beam forming scheme until the value difference of the user total data rate between two adjacent iterations is smaller than a predefined threshold value, and then iterating and finishing to obtain the optimal digital beam forming scheme and the optimal holographic beam forming scheme so as to process the transmitting signal according to the optimal digital beam forming scheme and the optimal holographic beam forming scheme and enable the total data rate of all users to reach the maximum value.
Optionally, obtaining an initial digital beamforming scheme according to the initial holographic beamforming scheme, includes:
according to the initial holographic beam forming scheme, performing digital beam forming on a transmitting signal by adopting a digital beam forming formula to obtain an initial digital beam forming scheme, wherein the digital beam forming formula is as follows:
wherein the content of the first and second substances,
P＝diag{Pi,P2，...，PLis aA diagonal matrix, optimal
μlIs QH(QQH)-1The first diagonal element of (v) is such that the equation is satisfied
Optionally, obtaining an optimized holographic beamforming scheme according to the initial digital beamforming scheme includes:
according to the initial digital beam forming scheme, and introducing a first auxiliary variable gammalAnd a second auxiliary variable δlObtaining a user rate maximization formula;
obtaining an optimal first auxiliary variable according to the user rate maximization formula
And a second auxiliary variable
By introducing lagrange multiplier lambdam，nLoosely constraining to a holographic beam linear equation set, and solving the holographic beam linear equation set to obtain a first holographic beam forming scheme;
updating lambda by a sub-gradient methodm，nAnd according to the updated lambdam，nSolving a holographic beam linear equation set to obtain an updated holographic beam forming scheme until the holographic beam forming scheme is converged to obtain an optimized holographic beam forming scheme;
wherein the user rate maximization formula is as follows:
wherein the content of the first and second substances,
definition of
Is composed of
The subscript m and the subscript n are vectorized to obtain an MN-dimensional column vector
Can be expressed as
Where etalIs a matrix Re (b)l)[Re(bl)]T+Im(bl)[Im(bl)]TIs determined by the maximum characteristic value of the image,
is corresponding to ηlThe (m-1) N + N-th component of the feature vector of (a);
the holographic beam linear equation set is as follows:
optionally, obtaining an optimal first auxiliary variable according to the user rate maximization formula
And a second auxiliary variable
The method comprises the following steps:
obtaining an optimal first auxiliary variable formula and an optimal second auxiliary variable formula according to the user rate maximization formula;
obtaining an optimal first auxiliary variable according to the optimal first auxiliary variable formula and the optimal second auxiliary variable formula
And an optimum second auxiliary variable
Wherein the optimal first auxiliary variable formula is:
the optimal second auxiliary variable formula is:
the communication emission system based on the reconfigurable holographic super surface comprises a beam direction determining module, a digital beam forming module, the reconfigurable holographic super surface and a bias voltage control module, wherein the bias voltage control module is connected with the reconfigurable holographic super surface and used for controlling the reconfigurable holographic super surface, the reconfigurable holographic super surface can carry out holographic beam forming, and the radiation amplitude of electromagnetic waves transmitted to each metamaterial radiation unit can be continuously adjusted by continuously changing the bias voltage of each power supply through metamaterial radiation units on the reconfigurable holographic super surface, so that the electromagnetic waves with different energies are radiated by each radiation unit and finally superposed into the electromagnetic waves with continuously adjustable directions.
In the communication optimization method of the communication emission system based on the reconfigurable holographic super surface, the radiation amplitude of each metamaterial radiation unit is initialized to obtain an initial holographic beam forming scheme, an initial digital beam forming scheme is obtained according to the initial holographic beam forming scheme, an optimized holographic beam forming scheme is obtained according to the initial digital beam forming scheme, the initial digital beam forming scheme is optimized according to the optimized holographic beam forming scheme to obtain an optimized digital beam forming scheme, the steps are repeated, the optimized digital beam forming scheme and the optimized holographic beam forming scheme are subjected to mutual iterative optimization until the value difference of the user total data rate between two adjacent iterations is smaller than a predefined threshold value, the iteration is completed, and the optimal digital beam forming scheme and the optimal holographic beam forming scheme are obtained, so as to process the transmitted signal according to the optimal digital beam forming scheme and the optimal holographic beam forming scheme, and the total data rate of all users reaches the maximum value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be 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 that other drawings can be obtained based on these drawings without inventive labor.
FIG. 1 is a schematic structural diagram of a reconfigurable holographic super surface of a communication transmitting system based on the reconfigurable holographic super surface in an embodiment of the invention;
FIG. 2 is a partial schematic diagram of transmission of electromagnetic waves on a waveguide of a communication transmission system based on a reconfigurable holographic super surface in the embodiment of the invention;
FIG. 3 is a schematic structural diagram of a metamaterial radiation unit in an embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps of a communication optimization method for a reconfigurable holographic-based super-surface communication launching system according to an embodiment of the present invention.
Description of reference numerals:
the antenna comprises a 1-parallel plate waveguide, a 2-metamaterial radiating unit, a 21-ground layer, a 22-dielectric layer, a 23-varactor, a 24-first patch layer, a 25-second patch layer and a 3-feed source.
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 some, not all, embodiments of the present invention. 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.
In order to implement ubiquitous intelligent information networks, the upcoming sixth generation (6G) wireless communications put stringent requirements on antenna technology, such as capacity enhancements and low power hardware components. Among the existing antenna technologies, the holographic antenna is a small-sized, low-power-consumption planar antenna, and is receiving increasing attention due to its multi-beam control capability with low manufacturing cost and low hardware cost. Specifically, the holographic antenna uses a metal patch to construct a holographic pattern on the surface, and records the interference between a reference wave and a target wave according to the interference principle. The radiation characteristics of the reference wave can then be varied by means of the holographic pattern to produce the desired radiation direction.
However, as mobile devices have increased explosively, conventional holographic antennas have presented significant challenges because once the holographic pattern is established, the radiation pattern of the conventional holographic antenna is fixed and thus cannot meet the requirements of mobile communications.
In the related art, the design and radiation direction control of the RHS (Reconfigurable holographic super surface) hardware component are mainly focused, and compared with the traditional dish antenna and phased array antenna, the RHS can realize dynamic beam forming without a heavy mechanical movement device and a complex phase shift circuit, so that the manufacturing cost and power loss of the antenna can be greatly saved, and meanwhile, the light and thin structure is very convenient to install. However, most studies only demonstrate the feasibility of RHS to achieve dynamic multi-beam control. At present, no work is done to study the influence of a transmitting device and a holographic beam forming scheme of multi-user communication under the assistance of RHS on the performance of a communication system.
In order to overcome the problems, the application provides a communication transmitting system and a communication optimization method based on a reconfigurable holographic super surface, wherein the communication transmitting system based on the reconfigurable holographic super surface can continuously adjust electromagnetic waves so as to realize that the total data rate of a user reaches the maximum under the scene of multi-user communication.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a reconfigurable holographic super surface of a communication transmission system based on the reconfigurable holographic super surface in an embodiment of the present invention, and fig. 2 is a partial schematic diagram of a communication transmission system based on the reconfigurable holographic super surface in an embodiment of the present invention, where electromagnetic waves are transmitted on a waveguide, and as shown in fig. 1 and fig. 2, the communication transmission system based on the reconfigurable holographic super surface includes: a beam pointing determination module for determining a direction in which to transmit a beam;
the digital beam forming module is connected with the beam pointing determining module and used for preprocessing the transmitting signals and eliminating the interference between the signals transmitted to different users;
the reconfigurable holographic super surface is connected with the digital beam forming module and is used for carrying out holographic beam forming, specifically, the metamaterial radiation units 2 on the reconfigurable holographic super surface can continuously adjust the radiation amplitude of the electromagnetic waves transmitted to each metamaterial radiation unit 2 by continuously changing the bias voltage of each power supply, so that each radiation unit radiates electromagnetic waves with different energy and finally superposes the electromagnetic waves with continuously adjustable directions;
and the bias voltage control module is connected with the reconfigurable holographic super surface and is used for presetting the adjustment interval of the bias voltage and adjusting the radiation amplitude of the electromagnetic waves radiated on each super surface unit on the reconfigurable holographic super surface according to the preset adjustment interval of the bias voltage.
In this embodiment, the beam direction determining module is configured to determine a direction of a transmission beam, and the digital beam forming module is connected to the beam direction determining module and configured to pre-process the transmission signal and eliminate interference between signals transmitted to different users. The reconfigurable holographic super surface is connected with the digital beam forming module and is used for continuously adjusting the radiation amplitude of the electromagnetic waves transmitted to each metamaterial radiation unit 2, so that the electromagnetic waves with different energy are radiated by each radiation unit and finally overlapped into the electromagnetic waves with continuously adjustable directions. And the bias voltage control module is connected with the reconfigurable holographic super surface and is used for presetting the adjustment interval of the bias voltage and adjusting the radiation amplitude of the electromagnetic waves radiated on each super surface unit on the reconfigurable holographic super surface according to the preset adjustment interval of the bias voltage.
In one possible implementation, the reconfigurable holographic super surface comprises a feed source 3, a parallel plate waveguide 1 and a metamaterial radiation unit 2;
the metamaterial radiation unit 2 is arrayed on the surface of the parallel plate waveguide 1;
the feed sources 3 are connected among the gaps of the metamaterial radiation units 2 on the surface of the parallel plate waveguide 1.
In the embodiment, the reconfigurable holographic super surface comprises a feed source 3, a parallel plate waveguide 1 and a metamaterial radiation unit 2, wherein the metamaterial radiation unit 2 is arrayed on the surface of the parallel plate waveguide 1, the feed source 3 is provided with a plurality of feed sources, and the feed sources are connected between gaps of the metamaterial radiation unit 2 on the surface of the parallel plate waveguide 1, wherein the feed source 3 emits electromagnetic waves, the electromagnetic waves propagate on the parallel plate waveguide 1 in a surface wave mode, during the propagation process, the metamaterial radiation unit 2 can realize the radiation amplitude adjustment of the electromagnetic waves propagating to the metamaterial radiation unit 2 by adjusting the bias voltage of a power supply in the metamaterial radiation unit 2, the bias voltage value has a one-to-one correspondence relation with the amplitude value of the electromagnetic waves radiated on the metamaterial radiation unit 2, so that the bias voltage of the power supply in the metamaterial radiation unit is adjusted to be a target bias voltage, the electromagnetic wave amplitude value radiated on the metamaterial radiation unit 2 is a target amplitude value so as to optimize the communication effect.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a metamaterial radiating element in an embodiment of the present invention, and in a possible implementation, the metamaterial radiating element 2 includes a ground layer 21, a dielectric layer 22, a first patch layer 24, a second patch layer 25, and a varactor 23;
the grounding layer 21 is connected to the bottom of the dielectric layer 22, and the first patch layer 24 and the second patch layer 25 are disposed on the dielectric layer 22;
the first patch layer 24 and the second patch layer 25 are connected through the varactor diode 23, the first patch layer 24 is connected to the ground layer 21, and the second patch layer 25 is connected to the power supply.
In this embodiment, the metamaterial radiation unit 2 includes a ground layer 21, a dielectric layer 22, a first patch layer 24, a second patch layer 25, and a varactor 23, where the first patch layer 24 and the second patch layer 25 are connected through the varactor 23, one of the patch layers is grounded, and the other patch layer leads out a pad through a pad on the back surface to electrically control the voltage across the varactor 23. By adjusting the voltage across the varactor diode 23, the amplitude of the radiation of the electromagnetic wave from the cell into free space can be controlled.
Referring to fig. 4, fig. 4 is a flowchart illustrating steps of a communication optimization method of a communication transmitting system based on a reconfigurable holographic super surface in an embodiment of the present invention, and as shown in fig. 4, the present invention further provides a communication optimization method of a communication transmitting system based on a reconfigurable holographic super surface, including:
step S401: initializing the radiation amplitude of each metamaterial radiation unit to obtain an initial holographic beam forming scheme;
in this embodiment, a base station (transmitting device) equipped with a Reconfigurable Holographic Surface (RHS) with K feed sources is considered to communicate with L mobile users, and the positions of the L mobile users relative to the transmitting device are the directions of the transmission beams required by the transmitting device. Assuming that the RHS is formed by MxN metamaterial radiation units, the radiation amplitude M of each metamaterial radiation unitm，n(namely the proportion of the energy radiation of the reference wave transmitted to each metamaterial radiation unit to the free space) carrying out initialization between 0 and 1 to obtain an initial holographic beam forming scheme; transmission channel between each radiating element and each user of RHS
The total channel matrix between the base station and each user l is represented by HlTo representThe dimension is 1 × MN; suppose that the signal sent by the base station to the user is s, where s is an L-dimensional column vector and s islRepresenting the signal sent to user/.
When a base station sends signals to a user, the base station firstly carries out digital beam forming on the signals sent to the user, then the coded signals are input into a feed source of an RHS (radio frequency signal receiver), and the feed source sends out a holographic beam forming that a reference wave carrying the sent signals passes through the RHS (namely, each radiation unit forms a holographic beam according to M)m，nRadiating reference wave energy into the free space to form a beam in a fixed direction) to the respective users, the received signal of each user can be expressed as:
yl＝HlMVlsl+HlM∑l′≠lVl′sl′+zl，
where V is a digital beamforming matrix of size K L, VlIs the l-th column of V, M is an element
Forming a matrix of size MN × K, KsIs the propagation vector of the reference wave propagating on the surface of the RHS,
is the distance vector, z, from the kth feed to the (m, n) th radiation elementlIs white gaussian noise in the channel.
The problem of maximizing the total transmission rate of the user is as follows:
wherein σ2Is zlThe variance of (c).
Step S402: obtaining an initial digital beam forming scheme according to the initial holographic beam forming scheme;
in this embodiment, an initial digital beamforming scheme is obtained according to an initial holographic beamforming scheme, in particular, according to the initial holographic beamforming schemeSimulating the radiation amplitude M of the initial metamaterial radiation element obtained in the initial holographic beam forming schemem，nChannel matrix HlPerforming digital beamforming on a transmitting signal by using a digital beamforming formula to obtain an initial digital beamforming scheme, wherein the digital beamforming formula is a formula for enabling total data rates of all users to reach a maximum value, and the digital beamforming formula is as follows:
wherein the content of the first and second substances,
P＝diag{p1，p2，...，pLis a diagonal matrix, optimal
μlIs QH(QQH)-1The first diagonal element of (v) is such that the equation is satisfied
Step S403: obtaining an optimized holographic beam forming scheme according to the initial digital beam forming scheme;
in the present embodiment, an optimized holographic beamforming scheme is obtained according to an initial digital beamforming scheme, and specifically, a first auxiliary variable γ is introduced according to the initial digital beamforming schemelAnd a second auxiliary variable δlObtaining a user rate maximization formula;
wherein the user rate maximization formula is as follows:
wherein the content of the first and second substances,
definition of
Is composed of
The subscript m and the subscript n are vectorized to obtain an MN-dimensional column vector
Can be expressed as
Where etalIs a matrix Re (b)l)[Re(bl)]T+Im(bl)[Im(bl)]TIs determined by the maximum characteristic value of the image,
is corresponding to ηlThe (m-1) N + N-th component of the feature vector of (1).
Obtaining an optimal first auxiliary variable according to the user rate maximization formula
And a second auxiliary variable
Obtaining an optimal first auxiliary variable according to the user rate maximization formula
And a second auxiliary variable
The method comprises the following steps:
obtaining an optimal first auxiliary variable formula and an optimal second auxiliary variable formula according to the user rate maximization formula;
obtaining an optimal first auxiliary variable according to the optimal first auxiliary variable formula and the optimal second auxiliary variable formula
And an optimum second auxiliary variable
Wherein by
Can obtain the optimal gammal，δlThe optimal first auxiliary variable formula is as follows:
the optimal second auxiliary variable formula is:
by introducing lagrange multiplier lambdam，nLoosely constraining to a holographic beam linear equation set, and solving the holographic beam linear equation set to obtain a first holographic beam forming scheme;
updating lambda by a sub-gradient methodm，nAnd according to the updated lambdam，nSolving the holographic beam linear equation set to obtain an updated holographic beam forming scheme, and if the holographic beam forming scheme is not converged, repeating the steps of: updating lambdam，nAnd according to the updated lambdam，nAnd solving the holographic beam linear equation set to obtain an updated holographic beam forming scheme, and iterating until the holographic beam forming scheme is converged to obtain an optimized holographic beam forming scheme.
The holographic beam linear equation set is as follows:
step S404: optimizing the initial digital beam forming scheme according to the optimized holographic beam forming scheme to obtain an optimized digital beam forming scheme;
step S405: and performing mutual iterative optimization on the optimized digital beam forming scheme and the optimized holographic beam forming scheme until the value difference of the user total data rate between two adjacent iterations is smaller than a predefined threshold value, and then completing the iterations to obtain the optimal digital beam forming scheme and the optimal holographic beam forming scheme.
In particular, in maintaining the holographic beamforming scheme { M }m，nObtaining a digital beam forming scheme V through a digital beam forming formula under the condition of fixing, and then adopting the optimization method to carry out the holographic beam forming scheme { M } according to the digital beam forming scheme Vm，nAnd repeating the steps, taking the optimized digital beam forming scheme and the optimized holographic beam forming scheme as initial solutions, and performing mutual iterative optimization on the optimized digital beam forming scheme and the optimized holographic beam forming scheme, wherein at least two iterations are performed until the value difference of the user total data rate between two adjacent iterations is smaller than a predefined threshold value, and then the iteration is completed to obtain the optimal digital beam forming scheme and the optimal holographic beam forming scheme, so that the transmitting signal is processed according to the optimal digital beam forming scheme and the optimal holographic beam forming scheme, and the total data rate of all users reaches the maximum value.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The communication transmitting system and the communication optimization method based on the reconfigurable holographic super surface provided by the invention are described in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (7)
1. A reconfigurable holographic meta-surface based communication launching system, comprising:
a beam pointing determination module for determining a direction in which to transmit a beam;
the digital beam forming module is connected with the beam pointing determining module and used for preprocessing the transmitting signals and eliminating the interference between the signals transmitted to different users;
the reconfigurable holographic super surface is connected with the digital beam forming module and is used for carrying out holographic beam forming, specifically, the metamaterial radiation units (2) on the reconfigurable holographic super surface can continuously adjust the radiation amplitude of electromagnetic waves transmitted to the metamaterial radiation units (2) by continuously changing the bias voltage of each power supply, so that the radiation units radiate electromagnetic waves with different energies and are finally superposed into the electromagnetic waves with continuously adjustable directions;
and the bias voltage control module is connected with the reconfigurable holographic super surface and is used for presetting the adjustment interval of the bias voltage and adjusting the radiation amplitude of the electromagnetic waves radiated on each super surface unit on the reconfigurable holographic super surface according to the preset adjustment interval of the bias voltage.
2. The reconfigurable holographic-based communication launching system of claim 1,
the reconfigurable holographic super surface comprises a feed source (3), a parallel plate waveguide (1) and the metamaterial radiation unit (2);
the metamaterial radiation units (2) are arrayed on the surface of the parallel plate waveguide (1);
the feed sources (3) are connected among gaps of the metamaterial radiation units (2) on the surface of the parallel plate waveguide (1).
3. The reconfigurable holographic-based communication launching system of claim 2,
the metamaterial radiation unit (2) comprises a ground layer (21), a dielectric layer (22), a first patch layer (24), a second patch layer (25) and a variable capacitance diode (23);
the grounding layer (21) is connected to the bottom of the dielectric layer (22), and the first patch layer (24) and the second patch layer (25) are arranged on the dielectric layer (22);
the first patch layer (24) and the second patch layer (25) are connected through the variable capacitance diode (23), the first patch layer (24) is connected with the ground layer (21), and the second patch layer (25) is connected with electricity.
4. A communication optimization method of a communication emission system based on a reconfigurable holographic super surface is characterized by comprising the following steps:
initializing the radiation amplitude of each metamaterial radiation unit to obtain an initial holographic beam forming scheme;
obtaining an initial digital beam forming scheme according to the initial holographic beam forming scheme;
obtaining an optimized holographic beam forming scheme according to the initial digital beam forming scheme;
optimizing the initial digital beam forming scheme according to the optimized holographic beam forming scheme to obtain an optimized digital beam forming scheme;
and mutually iterating and optimizing the optimized digital beam forming scheme and the optimized holographic beam forming scheme until the value difference of the user total data rate between two adjacent iterations is smaller than a predefined threshold value, and then iterating and finishing to obtain the optimal digital beam forming scheme and the optimal holographic beam forming scheme so as to process the transmitting signal according to the optimal digital beam forming scheme and the optimal holographic beam forming scheme and enable the total data rate of all users to reach the maximum value.
5. The method of claim 4,
obtaining an initial digital beamforming scheme according to the initial holographic beamforming scheme, including:
according to the initial holographic beam forming scheme, performing digital beam forming on a transmitting signal by adopting a digital beam forming formula to obtain an initial digital beam forming scheme, wherein the digital beam forming formula is as follows:
wherein the content of the first and second substances,
P＝diag{p1，p2，...，pLis a diagonal matrix, optimal
μlIs QH(QQH)-1The first diagonal element of (v) is such that the equation is satisfied
6. The method of claim 4,
obtaining an optimized holographic beamforming scheme according to the initial digital beamforming scheme, including:
according to the initial digital beam forming scheme, and introducing a first auxiliary variable gammalAnd a second auxiliary variable δlObtaining a user rate maximization formula;
obtaining an optimal first auxiliary variable according to the user rate maximization formula
And a second auxiliary variable
By introducing lagrange multiplier lambdam，nLoosely constraining to a holographic beam linear equation set, and solving the holographic beam linear equation set to obtain a first holographic beam forming scheme;
updating lambda by a sub-gradient methodm，nAnd according to the updated lambdam，nSolving a holographic beam linear equation set to obtain an updated holographic beam forming scheme until the holographic beam forming scheme is converged to obtain an optimized holographic beam forming scheme;
wherein the user rate maximization formula is as follows:
wherein the content of the first and second substances,
definition of
Is composed of
The MN-dimensional column vector obtained by vectorizing the subscripts m and n is obtained
Can be expressed as
Where etalIs a matrix Re (b)l)[Re(bl)]T+Im(bl)[Im(bl)]TIs determined by the maximum characteristic value of the image,
is corresponding to ηlThe (m-1) N + N-th component of the feature vector of (a);
the holographic beam linear equation set is as follows:
7. the method of claim 6,
obtaining an optimal first auxiliary variable according to the user rate maximization formula
And a second auxiliary variable
The method comprises the following steps:
obtaining an optimal first auxiliary variable formula and an optimal second auxiliary variable formula according to the user rate maximization formula;
obtaining an optimal first auxiliary variable according to the optimal first auxiliary variable formula and the optimal second auxiliary variable formula
And an optimum second auxiliary variable
Wherein the optimal first auxiliary variable formula is:
the optimal second auxiliary variable formula is:
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595607A (en) * | 2021-07-16 | 2021-11-02 | 北京大学 | Hybrid precoding method and system based on reconfigurable holographic super surface |
| CN113726391A (en) * | 2021-08-31 | 2021-11-30 | 杭州腓腓科技有限公司 | Multi-cell intra-compartment interference elimination method and system based on reconfigurable omnidirectional super surface |
| CN113726411A (en) * | 2021-08-30 | 2021-11-30 | 杭州腓腓科技有限公司 | Satellite communication device based on reconfigurable holographic super surface and optimization method thereof |
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| CN113783594A (en) * | 2021-09-13 | 2021-12-10 | 北京大学 | User pairing method and system based on reconfigurable holographic super surface |
| CN113852979A (en) * | 2021-11-30 | 2021-12-28 | 江苏易珩空间技术有限公司 | Communication signal reconstruction method, system and communication signal reconstruction device |
| CN114844539A (en) * | 2022-03-01 | 2022-08-02 | 杭州腓腓科技有限公司 | Resource allocation method and device based on holographic multiple access |
| WO2023184516A1 (en) * | 2022-04-02 | 2023-10-05 | Huawei Technologies Co.,Ltd. | System and method for controlling a metasurface |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012120379A1 (en) * | 2011-03-10 | 2012-09-13 | France Telecom | Method and apparatus for beamforming using data rate maximisation |
| US20150288063A1 (en) * | 2014-04-07 | 2015-10-08 | Mikala C. Johnson | Beam shaping for reconfigurable holographic antennas |
| CN109193173A (en) * | 2018-08-27 | 2019-01-11 | 余姚市万邦电机有限公司 | A kind of microwave section wave absorbing device part and method surpassing surface based on phase-adjustable |
| CN109904623A (en) * | 2019-03-12 | 2019-06-18 | 东南大学 | A kind of broadband inhale wave, scattering is adjustable super surface |
| CN111342216A (en) * | 2020-03-11 | 2020-06-26 | 中天宽带技术有限公司 | Beam width reconfigurable antenna |
| US20200274242A1 (en) * | 2016-01-07 | 2020-08-27 | Georgia Tech Research Corporation | Reconfigurable antennas and methods of operating the same |
| CN112117548A (en) * | 2020-10-09 | 2020-12-22 | 江苏赛博空间科学技术有限公司 | Super-surface unit with amplitude modulation function, metamaterial and application method |
-
2021
- 2021-03-10 CN CN202110262763.3A patent/CN113098536B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012120379A1 (en) * | 2011-03-10 | 2012-09-13 | France Telecom | Method and apparatus for beamforming using data rate maximisation |
| US20150288063A1 (en) * | 2014-04-07 | 2015-10-08 | Mikala C. Johnson | Beam shaping for reconfigurable holographic antennas |
| US20200274242A1 (en) * | 2016-01-07 | 2020-08-27 | Georgia Tech Research Corporation | Reconfigurable antennas and methods of operating the same |
| CN109193173A (en) * | 2018-08-27 | 2019-01-11 | 余姚市万邦电机有限公司 | A kind of microwave section wave absorbing device part and method surpassing surface based on phase-adjustable |
| CN109904623A (en) * | 2019-03-12 | 2019-06-18 | 东南大学 | A kind of broadband inhale wave, scattering is adjustable super surface |
| CN111342216A (en) * | 2020-03-11 | 2020-06-26 | 中天宽带技术有限公司 | Beam width reconfigurable antenna |
| CN112117548A (en) * | 2020-10-09 | 2020-12-22 | 江苏赛博空间科学技术有限公司 | Super-surface unit with amplitude modulation function, metamaterial and application method |
Non-Patent Citations (1)
| Title |
|---|
| 邓招等: "一种基于超材料的方向图可重构天线应用设计", 《通信技术》 * |
Cited By (18)
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| CN113783594B (en) * | 2021-09-13 | 2023-09-19 | 北京大学 | User pairing method and system based on reconfigurable holographic super surface |
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