CN110278017A - A kind of multi-antenna wireless energy transmission system and method based on intelligent reflecting surface - Google Patents
A kind of multi-antenna wireless energy transmission system and method based on intelligent reflecting surface Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- 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
- H04B7/04013—Intelligent reflective surfaces
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
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- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
This application discloses a kind of wireless energy transfer system, device, method and a kind of energy transmitter, a kind of intelligent reflecting surface and a kind of computer readable storage mediums, this method comprises: obtaining channel state information；The reflection parameters of beam forming vector sum intelligence reflecting surface are calculated according to the channel state information；Energy signal is sent according to the beam forming vector, and the reflection parameters are sent to the intelligent reflecting surface, so that the intelligent reflecting surface adjusts reflective array according to the reflection parameters；Wherein, the intelligent reflecting surface includes multiple reflective arrays, and the energy signal that the energy transmitter is sent is directed to energy receiver and by the intelligent reflective surface to the energy receiver.Wireless energy transfer method disclosed in the present application, improves wireless energy transmission efficiency and coverage area.
Description
Technical Field
The present application relates to the field of computer technologies, and more particularly, to a wireless energy transmission method, apparatus, system, and an energy transmitter and a computer-readable storage medium.
Background
With the development of 5 th generation mobile communication (5G) communication and future 5G, the application of the internet of things is closer to the life of people, and the demand of a large number of energy transmitters such as mobile phones, tablet computers and bluetooth headsets on portable charging is stronger.
Radio frequency-based wireless energy transmission technologies are receiving continuous attention due to their mobility, portability, long transmission distances, and the like. However, due to the characteristics of the wireless channel, the energy signal of the energy transmitter can be greatly faded during transmission, so that the wireless energy received by the energy receiver is too small. In addition, during the transmission of the energy signal, the energy signal may be blocked or even not transmitted to the energy receiver due to the existence of the blocking object. These phenomena lead to problems of too little energy collected at the energy receiver, low conversion efficiency, and small coverage.
Therefore, how to improve the wireless energy transmission efficiency and the coverage area is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The present application is directed to a wireless energy transmission method, apparatus, system, an energy transmitter, and a computer-readable storage medium, which improve wireless energy transmission efficiency and coverage.
In order to achieve the above object, the present application provides a wireless energy transmission method applied to an energy transmitter, including:
acquiring channel state information;
calculating a beam forming vector and a reflection parameter of the intelligent reflecting surface according to the channel state information;
sending an energy signal according to the beam forming vector, and sending the reflection parameter to the intelligent reflecting surface so that the intelligent reflecting surface can adjust the reflecting array according to the reflection parameter;
the intelligent reflecting surface comprises a plurality of reflecting arrays, and the energy signals sent by the energy sender are directly transmitted to an energy receiver and reflected to the energy receiver through the intelligent reflecting surface.
Wherein the reflection parameters include amplitude and argument.
Wherein, the calculating the beam forming vector and the reflection parameter of the intelligent reflecting surface according to the channel state information comprises:
initializing precision, reflection parameters and first target parameters;
calculating a beam forming matrix according to the channel state information, and calculating a reflection phase coefficient and a second target parameter according to the beam forming matrix and the channel state information;
updating the reflection parameters according to the reflection phase coefficients;
judging whether the difference value of the second target parameter and the first target parameter is smaller than the precision; if not, the step of calculating the beam forming matrix according to the channel state information is re-entered.
Wherein the updating the reflection parameter according to the reflection phase coefficient includes:
if rank (phi)(n+1)) When the ratio is less than or equal to 1, thenWherein phi is(n+1)Is the reflection phase coefficient, theta(n+1)For the purpose of said reflection parameter(s),σ1 (n+1)is phi(n+1)Characteristic value of (u)1 (n+1)The characteristic vector corresponding to the characteristic value is obtained, and N is a preset value;
if rank (phi)(n+1)) If greater than 1, thenWherein,u is phi(n+1)Of order N +1 unitary matrix, sigma being phi(n+1)The (N + 1) order diagonal matrix is an N +1 order circularly symmetric complex Gaussian random vector with a obedient mean value of 0 and a covariance matrix as a range matrix.
In order to achieve the above object, the present application provides a wireless energy transmission device applied to an energy transmitter, including:
an obtaining module, configured to obtain channel state information;
the calculation module is used for calculating a beam forming vector and a reflection parameter of the intelligent reflecting surface according to the channel state information;
the transmitting module is used for transmitting an energy signal according to the beam forming vector and transmitting the reflection parameter to the intelligent reflecting surface so that the intelligent reflecting surface can adjust the reflecting array according to the reflection parameter;
the intelligent reflecting surface comprises a plurality of reflecting arrays, and the energy signals sent by the energy sender are transmitted to the energy receiver through the intelligent reflecting surface.
Wherein the calculation module comprises:
the initialization unit is used for initializing the precision, the reflection parameter and the first target parameter;
the computing unit is used for computing a beam forming matrix according to the channel state information and computing a reflection phase coefficient and a second target parameter according to the beam forming matrix and the channel state information;
the updating unit is used for updating the reflection parameters according to the reflection phase coefficients;
the judging unit is used for judging whether the difference value between the second target parameter and the first target parameter is smaller than the precision; and if not, restarting the working process of the computing unit.
To achieve the above object, the present application provides an energy transmitter including:
a memory for storing a computer program;
a processor for implementing the steps of the wireless energy transfer method as described above when executing the computer program.
To achieve the above object, the present application provides a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, realizes the steps of the wireless energy transmission method as described above.
To achieve the above object, the present application provides an intelligent reflective surface, comprising a plurality of reflective arrays and a controller;
the controller is used for receiving the reflection parameters and adjusting the reflection array according to the reflection parameters;
and the reflection array is used for reflecting the energy signal sent by the energy transmitter to the energy receiver.
To achieve the above object, the present application provides a wireless energy transmission system, comprising:
the above energy transmitter;
the intelligent reflecting surface is described above;
and the energy receiver is used for receiving the direct energy signal of the energy transmitter and the energy signal reflected by the intelligent reflecting surface.
According to the scheme, the wireless energy transmission method provided by the application comprises the following steps: acquiring channel state information; calculating a beam forming vector and a reflection parameter of the intelligent reflecting surface according to the channel state information; sending an energy signal according to the beam forming vector, and sending the reflection parameter to the intelligent reflecting surface so that the intelligent reflecting surface can adjust a reflecting array according to the reflection parameter; the intelligent reflecting surface comprises a plurality of reflecting arrays, and the energy signals sent by the energy sender are directly transmitted to the energy receiver and are reflected to the energy receiver through the intelligent reflecting surface.
In the application, an intelligent reflecting surface is added between an energy transmitter and an energy receiver, and a wireless energy signal sent by the energy transmitter is subjected to reflection through the intelligent reflecting surface, so that an effective signal is increased, and the received energy signal intensity of the energy receiver is increased. When the energy receiver is far away from the energy transmitter and a shielding object is arranged, the problems of fast channel fading, small coverage area and the like can be solved more effectively, and the energy conversion efficiency and the coverage area are improved by adjusting beam forming and reflection parameters. The application also discloses a wireless energy transmission device, a system, an energy transmitter and a computer readable storage medium, which can also realize the technical effects.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure and not to limit the disclosure. In the drawings:
fig. 1 is an architecture diagram illustrating a wireless energy transfer system in accordance with an exemplary embodiment;
fig. 2 is a flow chart illustrating a method of wireless energy transfer in accordance with an exemplary embodiment;
fig. 3 is a flow chart illustrating another method of wireless energy transfer according to an example embodiment;
FIG. 4 is a graph of minimum energy collected in an energy receiver versus distance of the energy transmitter from the energy receiver;
FIG. 5 is a graph of the number of reflective arrays in an intelligent reflective surface versus the minimum energy collected in an energy receiver;
fig. 6 is a block diagram illustrating a wireless energy transfer device according to an exemplary embodiment;
fig. 7 is a block diagram illustrating an energy transmitter in accordance with an exemplary embodiment.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
For the sake of understanding, the wireless energy transmission method provided in the present application will be described below with reference to a wireless energy transmission system applied thereto. Referring to fig. 1, an architecture diagram of a wireless energy transmission system provided by an embodiment of the present application is shown, and as shown in fig. 1, includes an energy transmitter 10, an intelligent reflective surface 20, and K energy receivers 30.
The energy transmitter 10 is composed of M antennas, and communicates with the intelligent reflecting surface 20 and the energy receiver 30 to estimate each channel and acquire channel state information. And calculating parameters such as the optimal beam forming vector and the reflection phase, amplitude and the like of the intelligent reflecting surface according to the channel state information, and transmitting an energy signal according to the calculated beam forming vector.
The intelligent reflective surface 20 comprises N reflective arrays and a controller, wherein the reflective arrays are composed of inexpensive inductors, resistors, varactors and substrates, and are used for reflecting the energy signals transmitted by the energy transmitter 10 to the energy receiver 30. And the controller is used for receiving the reflection parameters and adjusting the reflection array according to the reflection parameters, and particularly, the phase and the amplitude of the reflection signal can be changed by controlling the capacitive reactance of the variable capacitor to adjust the reflection parameters of the reflection array.
The energy receiver 30 is used for receiving the energy signal directly transmitted by the energy transmitter 10 and the energy signal reflected by the intelligent reflecting surface 20.
The embodiment of the application discloses a wireless energy transmission method, which improves the wireless energy transmission efficiency and the coverage range.
Referring to fig. 2, a flow chart of a wireless energy transfer method according to an exemplary embodiment is shown, as shown in fig. 2, including:
s101: acquiring channel state information;
the execution subject of the present embodiment is the energy transmitter in the wireless energy transmission system described above. In this step, the energy transmitter communicates with the intelligent reflective surface and the energy receiver to estimate all channel state information.
Assuming that the energy receiver is a single antenna and there are K energy receivers in the system, set KεK, all channel state information includes a matrix of channel state information between the energy transmitter and the energy receiverChannel state information matrix T from energy transmitter to intelligent reflecting surface and channel state information matrix T from intelligent reflecting surface to energy receiver(K ═ 1.., K). The subscript d (direct) indicates that the channel matrix is a direct channel, r (deflect) indicates that the channel is a reflected channel, and the superscript H indicates the conjugate transpose.
S102: calculating a beam forming vector and a reflection parameter of the intelligent reflecting surface according to the channel state information;
in this step, the energy transmitter formulates an energy beam forming vector v according to all channel state information1,v2,...,vKAnd reflection parameters of reflection array in intelligent reflection surfaceWherein, thetai∈[0,2π](i e { 1.,. N }) is the argument in the reflection parameters, βi(i e { 1.,. N }) is the magnitude in the reflection parameter, assuming β herei1. For wavesBeam forming matrixIts maximum transmit power limit is tr (W)E) P is less than or equal to P, wherein P is the maximum transmitting power. The energy received by the kth energy receiver is
S103: sending an energy signal according to the beam forming vector, and sending the reflection parameter to the intelligent reflecting surface so that the intelligent reflecting surface can adjust the reflecting array according to the reflection parameter;
the intelligent reflecting surface comprises a plurality of reflecting arrays, and the energy signals sent by the energy sender are directly transmitted to an energy receiver and reflected to the energy receiver through the intelligent reflecting surface.
In the step, the energy transmitter transmits energy signals according to the formulated energy beams, the intelligent reflecting surface reflects the energy signals according to the formulated array parameters, and the energy receiver receives the energy signals reflected by the intelligent reflecting surface and the energy signals directly transmitted by the energy transmitter.
In the embodiment of the application, the intelligent reflecting surface is added between the energy transmitter and the energy receiver, and the wireless energy signal sent by the energy transmitter is reflected through the intelligent reflecting surface, so that the effective signal is increased, and the intensity of the received energy signal of the energy receiver is increased. When the energy receiver is far away from the energy transmitter and a shielding object is arranged, the problems of fast channel fading, small coverage area and the like can be solved more effectively, and the energy conversion efficiency and the coverage area are improved by adjusting beam forming and reflection parameters.
The embodiment of the application discloses a wireless energy transmission method, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme. Specifically, the method comprises the following steps:
referring to fig. 3, a flow chart of another wireless energy transfer method according to an exemplary embodiment is shown, as shown in fig. 3, including:
s201: acquiring channel state information;
s202: initializing precision, reflection parameters and first target parameters;
in this step, the initialization accuracy ∈ is 1 × 10-3Iterative initial value of reflection parameter θ(0)0, and 0, 0 is the first target parameter d.
S203: calculating a beam forming matrix according to the channel state information, and calculating a reflection phase coefficient and a second target parameter according to the beam forming matrix and the channel state information;
in the specific implementation, when the energy transmitter determines the reflection parameters of the energy beam forming and reflecting array, the purpose is to maximize the minimum value of the received energy in all energy receivers, and the mathematical optimization problem can be expressed as follows:
since the objective function is with respect to the reflectarray parameter Θ and a set of beamforming vectors { v }jThe joint of the maximum and minimum functions, so the problem is not a convex optimization problem, and the problem can be solved by an alternating iterative optimization method. First, fix the reflection parameter theta of the reflectarray, optimize the set of beamforming vectors { v }jThen, using the resulting set of beamforming vectors { v }jSolving the reflection parameter theta of the reflection array, and circularly iterating until the target function value converges to a certain range.The specific solving process is as follows:
the question (P1) is equivalently transformed into the context graph form. Under the reflection parameter theta of the fixed reflection array, the merged channel matrix of the direct path and the reflection path is set asThen the problem (P1) is equivalent to:
due to the existence of (P1.1) non-convex constraint rank (W)E) Min { M, K }, and therefore not a convex optimization problem, then applying semi-positive definite relaxation (SDR) to remove the rank constraint, makes it the following convex optimization problem:
it can be seen that (SDR1.1) is a semi-positive programming problem that can be solved with specialized software tools cvx.
Then using the obtained beam forming matrix WETo optimize the parameters of the reflection array of the variable reflection surfaceAnd theta. For the convenience of solution, the equivalent transformation is made to (P1) as follows:
order toAk,jIs a matrix of order N +1,is a vector of order N +1, where l is the new scalar element introduced and is constrained by l21 as the other pairThe vector composed of the first N terms of the result obtained by solving the variables is the vector composed of the diagonal elements of the reflection matrix parameters theta, namely the vectordiag (·) is a diagonal matrix [ ·](1:N)Is a vector taking the first N elements. Order toHas a covariance matrix ofFixed beam forming matrix WE(P1) after the above variables are replaced and equivalently transformed into a map form:
wherein phi isn,nThe value of the element in the n-th row and the n-th column of the matrix phi corresponds to the constraint 0 & lttheta & gt of the n-th argumentnLess than or equal to 2 pi. Similarly, (P1.2) is not a convex optimization problem because of the non-convex rank constraint that rank (Φ) is 1, and similarly, the rank constraint is removed by applying the semi-positive relaxation method (SDR) to make it a semi-positive programming problem, as follows:
the solution can be solved with a specialized software tool cvx.
In this step, given Θ(n)Next, the cvx solution problem (SDR1.1) is used to obtain the beam forming matrixWill be provided withThe angle of the two-dimensional image is diagonalized,W＝[w1,w2,...,wM]，thenBy usingAnd each channel state information is calculated as ak,j、bk,jAnd Ak,j. Solving the problem (SDR1.2) with cvx to obtain the reflection phase coefficient phi(n+1)And a second target parameter t(n+1)。
S204: updating the reflection parameters according to the reflection phase coefficients;
in this step, if rank (φ)(n+1)) When the ratio is less than or equal to 1, thenWherein phi is(n+1)Is the reflection phase coefficient, theta(n+1)For the purpose of said reflection parameter(s),σ1 (n+1)is phi(n+1)Characteristic value of (u)1 (n +1)The characteristic vector corresponding to the characteristic value is obtained, and N is a preset value;i.e. the argument of the first N elements.
If rank (phi)(n+1)) If greater than 1, thenWherein,u is phi(n+1)Of order N +1 unitary matrix, sigma being phi(n+1)The (N + 1) order diagonal matrix is an N +1 order circularly symmetric complex Gaussian random vector with a obedient mean value of 0 and a covariance matrix as a range matrix. Let r take the value of 100 times, take the enabling functionMaximum value of r, obtaining
S205: judging whether the difference value of the second target parameter and the first target parameter is smaller than the precision; if yes, entering S206; if not, the process re-enters S203.
In this step, if t(n+1)If d < epsilon, then go to S206, otherwise, t(n+1)Update theta(n)Is theta(n+1)And re-enters S203.
S206: and sending an energy signal according to the beam forming vector, and sending the reflection parameter to the intelligent reflecting surface so that the intelligent reflecting surface can adjust the reflecting array according to the reflection parameter.
For performance simulation and comparative experiments of the wireless energy transmission system in the present embodiment, fig. 4 shows the minimum received energy relationship from 2 meters to 13 meters of the energy receiver and the energy transmitter over the distance D. The parameters are set as follows: the number of antennas of an energy transmitter M is 4, the number of antennas of an energy receiver L is 4, the number of energy receivers K is 4, the distance between an intelligent reflecting surface and the energy transmitter is 15 meters, the energy receiver moves among the intelligent reflecting surface and the energy transmitter, and a path fading model is as follows:
wherein the distance D is referenced0＝1m，C0-30dB, path attenuation index α from energy transmitter to energy receiverAu3, path fading index α of energy transmitter to intelligent reflecting surfaceAI2, path fading index α from intelligent reflecting surface to energy receiverIuSetting the channel between the energy transmitter and the energy receiver as Rayleigh fading channel, connecting the energy transmitter to the intelligent reflection surface and connecting the intelligent reflection surface to the energyThe channel between the receivers is a rice channel, the rice factor rho is 3, and the transmission power of the energy transmitter is 10W. Compared with the original structure, after the intelligent reflecting surface is added, the energy receiver can obtain more wireless energy than the energy without intelligent reflection, and particularly, when the energy receiver is far away from the energy transmitter and is close to the intelligent reflecting surface, the minimum energy collected by the energy receiver can be slightly increased, which shows that the intelligent reflecting surface can improve the energy transmission efficiency and the transmission coverage when the energy receiver is far away from the energy transmitter.
Fig. 5 simulates the situation where the energy receiver collects the minimum energy when different numbers of intelligent reflective surfaces of reflective arrays are added to the system. The energy receiver is fixed on the straight line from the energy transmitter to the intelligent reflecting surface and is 9 meters away from the energy transmitter, and other parameters are the same as the simulation of the figure 4. It can be seen intuitively that the wireless energy received by the energy receiver increases significantly as the number of reflectarrays increases, further indicating that increasing the number of reflectarrays can effectively improve energy transmission efficiency and transmission coverage.
In the following, a wireless energy transmission device provided by an embodiment of the present application is introduced, and a wireless energy transmission device described below and a wireless energy transmission method described above may be referred to each other.
Referring to fig. 6, a block diagram of a wireless energy transmission apparatus according to an exemplary embodiment is shown, as shown in fig. 6, including:
an obtaining module 601, configured to obtain channel state information;
a calculating module 602, configured to calculate a beamforming vector and a reflection parameter of the intelligent reflecting surface according to the channel state information;
a sending module 603, configured to send an energy signal according to the beamforming vector, and send the reflection parameter to the intelligent reflective surface, so that the intelligent reflective surface adjusts a reflective array according to the reflection parameter;
the intelligent reflecting surface comprises a plurality of reflecting arrays, and the energy signals sent by the energy sender are transmitted to the energy receiver through the intelligent reflecting surface.
In the embodiment of the application, the intelligent reflecting surface is added between the energy transmitter and the energy receiver, and the wireless energy signal sent by the energy transmitter is subjected to reflection through the intelligent reflecting surface, so that an effective signal is increased, and the intensity of the received energy signal of the energy receiver is increased. When the energy receiver is far away from the energy transmitter and a shielding object is arranged, the problems of fast channel fading, small coverage area and the like can be solved more effectively, and the energy conversion efficiency and the coverage area are improved by adjusting beam forming and reflection parameters.
On the basis of the above embodiment, as a preferred implementation, the reflection parameters include amplitude and argument.
On the basis of the foregoing embodiment, as a preferred implementation, the calculating module 602 includes:
the initialization unit is used for initializing the precision, the reflection parameter and the first target parameter;
the computing unit is used for computing a beam forming matrix according to the channel state information and computing a reflection phase coefficient and a second target parameter according to the beam forming matrix and the channel state information;
the updating unit is used for updating the reflection parameters according to the reflection phase coefficients;
the judging unit is used for judging whether the difference value between the second target parameter and the first target parameter is smaller than the precision; and if not, restarting the working process of the computing unit.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The present application also provides an energy transmitter, and referring to fig. 7, an embodiment of the present application provides a structural diagram of an energy transmitter 700, as shown in fig. 7, which may include a processor 11 and a memory 12. The energy transmitter 700 may also include one or more of a multimedia component 13, an input/output (I/O) interface 14, and a communication component 15.
Wherein, the processor 11 is configured to control the overall operation of the energy transmitter 700 to complete all or part of the steps of the wireless energy transmission method. Memory 12 is used to store various types of data to support operation at the energy transmitter 700, which may include, for example, instructions for any application or method operating on the energy transmitter 700, as well as application-related data, such as contact data, transceived messages, pictures, audio, video, and so forth. The Memory 12 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. The multimedia component 13 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 12 or transmitted via the communication component 15. The audio assembly further comprises at least one speaker for outputting audio signals. The I/O interface 14 provides an interface between the processor 11 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication module 15 is used for wired or wireless communication between the energy transmitter 700 and other devices. Wireless communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so that the corresponding communication component 15 may include: Wi-Fi module, bluetooth module, NFC module.
In an exemplary embodiment, the energy transmitter 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the wireless energy transmission methods described above.
In another exemplary embodiment, a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the above-described wireless energy transfer method is also provided. For example, the computer readable storage medium may be the above-mentioned memory 12 comprising program instructions which are executable by the processor 11 of the energy transmitter 700 to perform the above-mentioned wireless energy transfer method.
The application also provides an intelligent reflecting surface, which comprises a plurality of reflecting arrays and a controller;
the controller is used for receiving the reflection parameters and adjusting the reflection array according to the reflection parameters;
and the reflection array is used for reflecting the energy signal sent by the energy transmitter to the energy receiver.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are 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 apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A wireless energy transmission method is applied to an energy transmitter and comprises the following steps:
acquiring channel state information;
calculating a beam forming vector and a reflection parameter of the intelligent reflecting surface according to the channel state information;
sending an energy signal according to the beam forming vector, and sending the reflection parameter to the intelligent reflecting surface so that the intelligent reflecting surface can adjust the reflecting array according to the reflection parameter;
the intelligent reflecting surface comprises a plurality of reflecting arrays, and the energy signals sent by the energy sender are directly transmitted to the energy receiver and reflected to the energy receiver through the intelligent reflecting surface.
2. The wireless energy transfer method of claim 1 wherein the reflection parameters include amplitude and argument.
3. The wireless energy transmission method according to claim 1, wherein the calculating of the beamforming vector and the reflection parameter of the intelligent reflecting surface according to the channel state information comprises:
initializing precision, reflection parameters and first target parameters;
calculating a beam forming matrix according to the channel state information, and calculating a reflection phase coefficient and a second target parameter according to the beam forming matrix and the channel state information;
updating the reflection parameters according to the reflection phase coefficients;
judging whether the difference value of the second target parameter and the first target parameter is smaller than the precision; if not, the step of calculating the beam forming matrix according to the channel state information is re-entered.
4. The wireless energy transfer method according to claim 3, wherein the updating the reflection parameter according to the reflection phase coefficient comprises:
if rank (phi)(n+1)) When the ratio is less than or equal to 1, thenWherein phi is(n+1)Is the reflection phase coefficient, theta(n+1)For the purpose of said reflection parameter(s),σ1 (n+1)is phi(n+1)Characteristic value of (u)1 (n+1)The characteristic vector corresponding to the characteristic value is obtained, and N is a preset value;
if rank (phi)(n+1)) If greater than 1, thenWherein,u is phi(n+1)Of order N +1 unitary matrix, sigma being phi(n+1)The (N + 1) order diagonal matrix is an N +1 order circularly symmetric complex Gaussian random vector with a mean value of 0 and a covariance matrix as a range matrix.
5. A wireless energy transmission device, applied to an energy transmitter, comprising:
an obtaining module, configured to obtain channel state information;
the calculation module is used for calculating a beam forming vector and a reflection parameter of the intelligent reflecting surface according to the channel state information;
the transmitting module is used for transmitting an energy signal according to the beam forming vector and transmitting the reflection parameter to the intelligent reflecting surface so that the intelligent reflecting surface can adjust the reflecting array according to the reflection parameter;
the intelligent reflecting surface comprises a plurality of reflecting arrays, and the energy signals sent by the energy sender are transmitted to the energy receiver through the intelligent reflecting surface.
6. The wireless energy transmission device according to claim 5, wherein the calculation module comprises:
the initialization unit is used for initializing the precision, the reflection parameter and the first target parameter;
the computing unit is used for computing a beam forming matrix according to the channel state information and computing a reflection phase coefficient and a second target parameter according to the beam forming matrix and the channel state information;
the updating unit is used for updating the reflection parameters according to the reflection phase coefficients;
the judging unit is used for judging whether the difference value between the second target parameter and the first target parameter is smaller than the precision; and if not, restarting the working process of the computing unit.
7. An energy transmitter, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the wireless energy transfer method according to any of claims 1 to 4 when executing the computer program.
8. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the wireless energy transfer method according to any one of claims 1 to 4.
9. An intelligent reflecting surface is characterized by comprising a plurality of reflecting arrays and a controller;
the controller is used for receiving the reflection parameters and adjusting the reflection array according to the reflection parameters;
and the reflection array is used for reflecting the energy signal sent by the energy transmitter to the energy receiver.
10. A wireless energy transfer system, comprising:
the energy transmitter of claim 7;
the intelligent reflective surface of claim 9;
and the energy receiver is used for receiving the direct energy signal of the energy transmitter and the energy signal reflected by the intelligent reflecting surface.
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Cited By (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111093267A (en) * | 2019-12-23 | 2020-05-01 | 华中科技大学 | IRS-based UE position determination method, communication method and system |
| CN111162823A (en) * | 2019-12-25 | 2020-05-15 | 浙江工业大学 | Method for optimizing precoding matrix and phase shift matrix in bidirectional MIMO communication system |
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| CN115103370A (en) * | 2022-06-17 | 2022-09-23 | 中国铁建电气化局集团有限公司 | RIS wireless coverage enhancement method based on RT on-ring channel situation estimation |
| WO2023061236A1 (en) * | 2021-10-11 | 2023-04-20 | 中国电信股份有限公司 | Intelligent surface device and system, and control method, apparatus and system |
| RU2804691C1 (en) * | 2020-07-02 | 2023-10-06 | ЗедТиИ КОРПОРЕЙШН | Segmentation of surface-generating elements and grouping of nodes for smart reflecting devices |
| US12003311B2 (en) | 2021-03-29 | 2024-06-04 | Nec Corporation | Dynamic control of an unmanned aerial vehicle using a reconfigurable intelligent surface |
| US12119538B2 (en) | 2023-06-13 | 2024-10-15 | Yungu (Gu'an) Technology Co., Ltd. | Display panel assembly, multi-function assembly, transceiver assembly, and wireless communication apparatus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090073073A1 (en) * | 2005-08-18 | 2009-03-19 | Brown Kenneth W | Foldable Reflect Array |
| US20140217904A1 (en) * | 2013-02-07 | 2014-08-07 | Wen-Sung Lee | Intelligent illuminating device |
| CN106716825A (en) * | 2014-07-21 | 2017-05-24 | 科希尔技术股份有限公司 | Methods of operating and implementing wireless otfs communciations systems |
| CN108141771A (en) * | 2015-11-17 | 2018-06-08 | 华为技术有限公司 | For the system and method for multi-source channel estimation |
| CN109638411A (en) * | 2018-12-27 | 2019-04-16 | 电子科技大学 | A kind of restructural intelligence WIFI antenna of dual-band and dual-polarization |
| CN109800380A (en) * | 2019-01-30 | 2019-05-24 | 上海卫星工程研究所 | The tight imaging geometry model building method that satellite-borne microwave remote sensing instrument detects over the ground |
-
2019
- 2019-06-27 CN CN201910569593.6A patent/CN110278017B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090073073A1 (en) * | 2005-08-18 | 2009-03-19 | Brown Kenneth W | Foldable Reflect Array |
| US20140217904A1 (en) * | 2013-02-07 | 2014-08-07 | Wen-Sung Lee | Intelligent illuminating device |
| CN106716825A (en) * | 2014-07-21 | 2017-05-24 | 科希尔技术股份有限公司 | Methods of operating and implementing wireless otfs communciations systems |
| CN108141771A (en) * | 2015-11-17 | 2018-06-08 | 华为技术有限公司 | For the system and method for multi-source channel estimation |
| CN109638411A (en) * | 2018-12-27 | 2019-04-16 | 电子科技大学 | A kind of restructural intelligence WIFI antenna of dual-band and dual-polarization |
| CN109800380A (en) * | 2019-01-30 | 2019-05-24 | 上海卫星工程研究所 | The tight imaging geometry model building method that satellite-borne microwave remote sensing instrument detects over the ground |
Non-Patent Citations (1)
| Title |
|---|
| QINGQING WU等: "Intelligent Reflecting Surface Enhanced Wireless Network: Joint Active and Passive Beamforming Design", 《2018 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM)》 * |
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| CN113965245A (en) * | 2021-09-30 | 2022-01-21 | 广西电网有限责任公司柳州供电局 | Intelligent reflecting surface communication system resource optimization method based on OPGW (optical fiber composite overhead ground wire) joint box |
| WO2023061236A1 (en) * | 2021-10-11 | 2023-04-20 | 中国电信股份有限公司 | Intelligent surface device and system, and control method, apparatus and system |
| CN113795004A (en) * | 2021-11-15 | 2021-12-14 | 湖南金龙智造科技股份有限公司 | Communication method and system for indoor 5G terminal and workshop thereof |
| CN114389668A (en) * | 2022-01-21 | 2022-04-22 | 上海物骐微电子有限公司 | Signal enhancement method and signal enhancement system |
| CN114389668B (en) * | 2022-01-21 | 2024-04-09 | 上海物骐微电子有限公司 | Signal enhancement method and signal enhancement system |
| CN114599044A (en) * | 2022-03-07 | 2022-06-07 | 西北工业大学 | Beam forming optimization method in cognitive network based on intelligent reflector technology |
| CN114599044B (en) * | 2022-03-07 | 2024-04-30 | 西北工业大学 | Intelligent reflector technology-based beam forming optimization method in cognitive network |
| CN115103370A (en) * | 2022-06-17 | 2022-09-23 | 中国铁建电气化局集团有限公司 | RIS wireless coverage enhancement method based on RT on-ring channel situation estimation |
| US12119538B2 (en) | 2023-06-13 | 2024-10-15 | Yungu (Gu'an) Technology Co., Ltd. | Display panel assembly, multi-function assembly, transceiver assembly, and wireless communication apparatus |
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