CN113765565A - Non-orthogonal multiple access communication method and system based on reconfigurable holographic super surface - Google Patents
Non-orthogonal multiple access communication method and system based on reconfigurable holographic super 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
- 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
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/002—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices being reconfigurable or tunable, e.g. using switches or diodes
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- H—ELECTRICITY
- 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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- 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
- H04B7/0413—MIMO systems
- H04B7/0426—Power distribution
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Abstract
The invention relates to a non-orthogonal multiple access communication method and a non-orthogonal multiple access communication system based on a reconfigurable holographic super surface. The reconfigurable holographic super-surface-based non-orthogonal multiple access communication method comprises the steps of establishing an initial problem model of the total user data rate based on the communication data rate of each user after the communication data rate of each user is determined according to a non-orthogonal multiple access technology, then determining the initial problem model of the total user data rate as a user data total rate maximization problem model by introducing auxiliary variables, and finally determining a power distribution scheme and a holographic beam forming scheme based on the user data total rate maximization problem model by adopting a mathematical iteration method to optimally control the communication power and the beam forming in the communication process of a base station and the users so as to enable the total communication rate between the base station and the users to be maximized.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a reconfigurable holographic super-surface-based non-orthogonal multiple access communication method and system.
Background
In order to implement ubiquitous intelligent information networks, the upcoming sixth generation (6G) wireless communication puts stringent requirements on antenna technology, such as capacity enhancement and precise beam steering. While the ability of both the widely used dish antennas and phased array antennas to achieve these goals has been met, they all have their own inherent drawbacks that have severely hampered their future development. In particular, dish antennas require heavy and expensive beam steering mechanisms, while phased arrays rely heavily on power amplifiers, consume large amounts of power, have complex phase shifting circuits, and numerous phase shifters, especially in the high frequency band. Therefore, to meet the data requirements of the exponentially growing mobile devices in future 6G wireless systems, more cost-effective and efficient antenna techniques are needed. 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. Due to the controllability of metamaterials, emerging RHS technologies show great potential in improving the deficiencies of traditional holographic antennas. The RHS is an ultra-light thin plane antenna, and a plurality of metamaterial radiating elements are embedded on the surface of the antenna. In particular, the RHS is excited by the reference wave generated by the antenna feed in the form of a surface wave, making it possible to manufacture an RHS based on Printed Circuit Board (PCB) technology with a compact structure. According to the hologram pattern, each radiation element can generate a desired radiation direction by electrically controlling the radiation amplitude of the reference wave. Therefore, compared with the traditional dish antenna and the traditional phased array antenna, the RHS can realize dynamic beam forming without a heavy mechanical movement device and a complex phase shift circuit, can greatly save the manufacturing cost and the power loss of the antenna, and is very convenient to install due to a light and thin structure.
One subchannel can be allocated to only one user in the orthogonal multiple access scheme, but multiple users can simultaneously share the same subchannel in the non-orthogonal multiple access (NOMA) scheme, which also results in severe inter-user interference on each subchannel. To address this problem, various multi-user detection techniques, such as successive interference cancellation, may be applied at the end-user receiver to decode the received signal. NOMA can achieve a larger capacity region than the orthogonal multiple access scheme through power domain multiplexing at the transmitting end and serial interference cancellation at the receiving end.
Whereas existing communication schemes do not disclose the relevant content of combining RHS and NOMA.
Disclosure of Invention
The invention aims to provide a reconfigurable holographic super-surface-based non-orthogonal multiple access communication method and system, which can fill the blank of the communication scheme in the prior art and can maximize the total communication rate of a communication device.
In order to achieve the purpose, the invention provides the following scheme:
a non-orthogonal multiple access communication method based on a reconfigurable holographic super surface is applied to communication between a base station comprising the reconfigurable holographic super surface and a user; the non-orthogonal multiple access communication method based on the reconfigurable holographic super surface comprises the following steps:
determining the communication data rate of each user according to a non-orthogonal multiple access technology;
constructing an initial problem model of the total user data rate based on the communication data rate of each user;
introducing auxiliary variables to determine the initial problem model of the total user data rate as a problem model for maximizing the total user data rate;
and determining a power distribution scheme and a holographic beam forming scheme based on the user data total rate maximization problem model by adopting a mathematical iteration method.
Preferably, the determining the communication data rate of each user according to the non-orthogonal multiple access technology specifically includes:
and determining the communication data rate of each user according to the non-orthogonal multiple access technology based on the signals received by the users and the base station parameters.
Preferably, the mathematical iteration method is a lagrangian iteration algorithm.
Preferably, the determining the power allocation scheme and the holographic beamforming scheme based on the user data total rate maximization problem model by using a mathematical iteration method specifically includes:
and introducing a Lagrange multiplier, loosely constraining the Lagrange multiplier to a Lagrange objective function, and solving the Lagrange objective function through Lagrange iteration to obtain the power distribution scheme and the holographic beam forming scheme.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a reconfigurable holographic super-surface-based non-orthogonal multiple access communication method, which comprises the steps of establishing an initial problem model of a user data total rate based on the communication data rate of each user after determining the communication data rate of each user according to a non-orthogonal multiple access technology, then determining the initial problem model of the user data total rate as a user data total rate maximization problem model by introducing auxiliary variables, and finally determining a power distribution scheme and a holographic beam forming scheme based on the user data total rate maximization problem model by adopting a mathematical iteration method so as to optimally control the communication power and the beam forming in the communication process of a base station and the user, thereby enabling the communication total rate between the base station and the user to be maximized.
Corresponding to the provided non-orthogonal multiple access communication method based on the reconfigurable holographic super surface, the invention also provides the following implementation systems:
a non-orthogonal multiple access communication system based on a reconfigurable holographic super surface is applied to communication between a base station comprising the reconfigurable holographic super surface and a user; the reconfigurable holographic super surface-based non-orthogonal multiple access communication system comprises:
a communication data rate determining module for determining the communication data rate of each user according to the non-orthogonal multiple access technology;
an initial problem model building module, configured to build an initial problem model of a total user data rate based on the communication data rate of each user;
the user data total rate maximization problem model determination module is used for introducing auxiliary variables to determine the initial problem model of the user data total rate as a user data total rate maximization problem model;
and the scheme determining module is used for determining a power distribution scheme and a holographic beam forming scheme based on the user data total rate maximization problem model by adopting a mathematical iteration method.
Preferably, the communication data rate determining module includes:
and the communication data rate determining unit is used for determining the communication data rate of each user according to the non-orthogonal multiple access technology based on the signals received by the users and the base station parameters.
Preferably, the mathematical iteration method is a lagrangian iteration algorithm.
Preferably, the scheme determining module includes:
and the scheme determining unit is used for introducing a Lagrange multiplier, loosely constraining the Lagrange multiplier to a Lagrange objective function, and solving the Lagrange objective function through Lagrange iteration to obtain the power distribution scheme and the holographic beam forming scheme.
The technical effect achieved by the reconfigurable holographic super surface-based non-orthogonal multiple access communication system provided by the invention is the same as that achieved by the reconfigurable holographic super surface-based non-orthogonal multiple access communication method, and therefore, the detailed description is omitted here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flow chart of a reconfigurable holographic super surface-based non-orthogonal multiple access communication method provided by the invention;
FIG. 2 is a schematic structural diagram of a reconfigurable holographic super surface provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating transmission of guided waves on a waveguide according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a metamaterial radiation unit provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a complementary lc resonant ring according to an embodiment of the present invention;
fig. 6 is a block diagram of a successive interference cancellation technique according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a non-orthogonal multiple access communication system based on a reconfigurable holographic super surface provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a reconfigurable holographic super-surface-based non-orthogonal multiple access communication method and system, which can fill the blank of the communication scheme in the prior art and can maximize the total communication rate of a communication device.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a non-orthogonal multiple access communication method based on a reconfigurable holographic super surface, which is mainly applied to communication between a base station comprising the reconfigurable holographic super surface and a user. As shown in FIG. 2, the reconfigurable holographic super surface is composed of a feed source 1, a parallel plate waveguide 2 and a metamaterial radiation unit 3 array. The feed source 1 emits electromagnetic waves, the electromagnetic waves are transmitted on the parallel plate waveguide 2 in a surface wave mode (as shown in fig. 3), in the transmission process, the metamaterial radiation unit 3 is controlled by the variable capacitance diode 5, and the radiation amplitude of the electromagnetic waves transmitted to the metamaterial radiation unit 3 can be adjusted by adjusting the voltage of the variable capacitance diode 5 applied to each metamaterial radiation unit 3, so that the bias voltage applied to the variable capacitance diode 5 in the metamaterial radiation unit is adjusted to a target value, and the amplitude value of the electromagnetic waves radiated on the metamaterial radiation unit 3 is a target amplitude value. The varactor 5 is a component on the complementary lc resonant ring 4 in the metamaterial radiating element 3. The structure of the metamaterial radiating unit 3 is shown in fig. 4, and the structure of the complementary lc resonant ring 4 is shown in fig. 5.
Based on this, the non-orthogonal multiple access communication method based on the reconfigurable holographic super surface provided by the invention, as shown in fig. 1, includes:
step 100: the communication data rate for each user is determined according to a non-orthogonal multiple access technique. For example, the step 100 is: and determining the communication data rate of each user according to the non-orthogonal multiple access technology based on the signals received by the users and the base station parameters.
Step 101: an initial problem model of the total rate of user data is constructed based on the communication data rate of each user.
Step 102: and introducing auxiliary variables to determine an initial problem model of the total user data rate as a problem model for maximizing the total user data rate.
Step 103: and determining a power distribution scheme and a holographic beam forming scheme based on a user data total rate maximization problem model by adopting a mathematical iteration method.
When the mathematical iteration method is a lagrangian iteration algorithm, the implementation process of step 103 may be:
and introducing a Lagrange multiplier, loosely constraining the Lagrange multiplier to a Lagrange objective function, and solving the Lagrange objective function through Lagrange iteration to obtain a power distribution scheme and a holographic beam forming scheme.
The following is an example of the implementation process of the non-orthogonal multiple access communication method based on the reconfigurable holographic super surface, provided by the present invention, based on the communication process between the base station and the user.
Considering that a base station (transmitting device) equipped with L Reconfigurable Holographic Surface (RHS) of feed sources needs to communicate with L users, the positions of the L mobile users relative to the transmitting device are the directions of the transmission beams required by the transmitting device. Suppose that the RHS is formed by M × N metamaterial radiation elements, and the radiation amplitude of each radiation element is [0, 1%]In between, the base station divides the available spectrum resource into L sub-channels, each sub-channel is used to transmit a single data stream x to each userlAnd the base station allocates power for each user. Let the transmit power of the base station signal received by the ith user through the ith subchannel be denoted as plTo ensure that the sum of the transmitted power allocated by the base station is less than its own total power, Σ must be satisfiedlPl≤PTIn which P isTIs the total transmission power of the base station. Each radiation unit of RHS passes through the transmission channel between the l sub-channel and the l user
The base station firstly performs power distribution on signals sent to users, then inputs the signals transmitted to each user into a feed source of the RHS, the feed source sends out reference waves carrying the sent signals, the reference waves are formed by holographic beams of the RHS and sent to each user through different sub-channels, and then the signals received by each user can be represented as follows:
wherein l' is the user serial number, ksIs the propagation vector of the reference wave propagating on the surface of the RHS,
for the l < th > feed source to the (m, n < th >) radiation sheetDistance vector of elements, wlIs white gaussian noise in the channel.
Do not provide:
abbreviated as s1≥s2≥…≥sL。
Wherein, the holographic beam forming is that each radiation unit is according to the radiation amplitude Mm,nThe reference wave energy is radiated to the free space to form a beam in a fixed direction.
The successive interference cancellation technique is shown in fig. 6. Then according to the NOMA protocol, the communication data rate of each user l is:
wherein σ2Is the noise power.
The user data total rate maximization problem (i.e. the initial problem model for the user data total rate) can be modeled as:
the second of which is the base station transmit total power limit.
Next, the joint optimization design algorithm of the NOMA power allocation scheme and the holographic beam forming is described:
by introducing an auxiliary variable gammal,zlThe user rate maximization problem can be rewritten into a user data total rate maximization problem model:
definition of
Is composed of
The subscripts m and n are vectorized to obtain an MN dimensional column vector
The linear approximation of (d) can be expressed as:
wherein eta islIs 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).
By passing
Can obtain the optimal gammal,zlThe specific expression is as follows:
by introducing lagrange multipliers mu, lambdam,nThe relaxation is constrained into the objective function, and the corresponding lagrange function can be written as:
in each Lagrange iteration, the optimal power distribution scheme and the optimal holographic beam forming scheme are solved in an iteration mode
Wherein the optimal power allocation scheme and mu*This can be derived by solving the following system of equations:
optimized holographic beamforming scheme
This can be obtained by solving the following system of linear equations:
in summary, the complete power allocation scheme and holographic beamforming joint optimization design algorithm is summarized as follows:
(1) initialization Mm,n,Pl。
(2) Is calculated by the formula (a) and the formula (b)
And
(3) is calculated by the formula (c)
And mu*
(4) Is calculated by the formula (d)
(5) Updating lambda by a sub-gradient methodm,n。
(6) Checking whether the algorithm is converged, if not, returning to the step (2) for continuous iteration, and if so, ending the algorithm to obtain the optimal power distribution scheme
And holographic beamforming scheme
Corresponding to the provided non-orthogonal multiple access communication method based on the reconfigurable holographic super surface, the invention also provides a non-orthogonal multiple access communication system based on the reconfigurable holographic super surface, which is applied to communication between a base station comprising the reconfigurable holographic super surface and a user.
As shown in fig. 7, the reconfigurable holographic super surface based non-orthogonal multiple access communication system includes: a communication data rate determination module 600, an initial problem model construction module 601, a user data total rate maximization problem model determination module 602, and a scenario determination module 603.
The communication data rate determination module 600 is configured to determine a communication data rate for each user according to a non-orthogonal multiple access technique.
The initial problem model building module 601 is used for building an initial problem model of the total user data rate based on the communication data rate of each user.
The overall user data rate maximization problem model determination module 602 is configured to introduce an auxiliary variable to determine an initial problem model of the overall user data rate as the overall user data rate maximization problem model.
The scheme determination module 603 is configured to determine the power allocation scheme and the holographic beamforming scheme based on the user data total rate maximization problem model using a mathematical iteration method.
In order to further improve the communication efficiency, the communication data rate determining module 600 includes: a communication data rate determination unit. The communication data rate determining unit is mainly used for determining the communication data rate of each user according to the non-orthogonal multiple access technology based on the signals received by the users and the parameters of the base station.
If the mathematical iteration method is a lagrangian iteration algorithm, the above-mentioned scheme determining module 603 preferably includes: a scheme determination unit. The scheme determining unit is used for introducing a Lagrangian multiplier, loosely constraining the Lagrangian multiplier to a Lagrangian objective function, and solving the Lagrangian objective function through Lagrangian iteration to obtain a power distribution scheme and a holographic beam forming scheme.
In addition, the invention also provides a computer readable storage medium. The computer readable storage medium has stored therein a software program. The software program is used for executing the non-orthogonal multiple access communication method based on the reconfigurable holographic super surface provided by the invention.
The embodiments in the present description 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. 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.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A non-orthogonal multiple access communication method based on a reconfigurable holographic super surface is characterized by being applied to communication between a base station comprising the reconfigurable holographic super surface and a user; the non-orthogonal multiple access communication method based on the reconfigurable holographic super surface comprises the following steps:
determining the communication data rate of each user according to a non-orthogonal multiple access technology;
constructing an initial problem model of the total user data rate based on the communication data rate of each user;
introducing auxiliary variables to determine the initial problem model of the total user data rate as a problem model for maximizing the total user data rate;
and determining a power distribution scheme and a holographic beam forming scheme based on the user data total rate maximization problem model by adopting a mathematical iteration method.
2. The method according to claim 1, wherein the determining the communication data rate of each user according to the non-orthogonal multiple access technology comprises:
and determining the communication data rate of each user according to the non-orthogonal multiple access technology based on the signals received by the users and the base station parameters.
3. The reconfigurable holographic super surface based non-orthogonal multiple access communication method according to claim 1, wherein the mathematical iterative method is a Lagrangian iterative algorithm.
4. The reconfigurable holographic super surface based non-orthogonal multiple access communication method according to claim 3, wherein the determining the power allocation scheme and the holographic beamforming scheme based on the user data total rate maximization problem model by using a mathematical iteration method specifically comprises:
and introducing a Lagrange multiplier, loosely constraining the Lagrange multiplier to a Lagrange objective function, and solving the Lagrange objective function through Lagrange iteration to obtain the power distribution scheme and the holographic beam forming scheme.
5. A non-orthogonal multiple access communication system based on a reconfigurable holographic super surface is characterized in that the system is applied to communication between a base station comprising the reconfigurable holographic super surface and a user; the reconfigurable holographic super surface-based non-orthogonal multiple access communication system comprises:
a communication data rate determining module for determining the communication data rate of each user according to the non-orthogonal multiple access technology;
an initial problem model building module, configured to build an initial problem model of a total user data rate based on the communication data rate of each user;
the user data total rate maximization problem model determination module is used for introducing auxiliary variables to determine the initial problem model of the user data total rate as a user data total rate maximization problem model;
and the scheme determining module is used for determining a power distribution scheme and a holographic beam forming scheme based on the user data total rate maximization problem model by adopting a mathematical iteration method.
6. The reconfigurable holographic super surface based non-orthogonal multiple access communication system of claim 5, wherein the communication data rate determination module comprises:
and the communication data rate determining unit is used for determining the communication data rate of each user according to the non-orthogonal multiple access technology based on the signals received by the users and the base station parameters.
7. The reconfigurable holographic super surface based non-orthogonal multiple access communication system of claim 5, wherein the mathematical iteration method is a Lagrangian iteration algorithm.
8. The reconfigurable holographic super surface based non-orthogonal multiple access communication system of claim 7, wherein the scheme determination module comprises:
and the scheme determining unit is used for introducing a Lagrange multiplier, loosely constraining the Lagrange multiplier to a Lagrange objective function, and solving the Lagrange objective function through Lagrange iteration to obtain the power distribution scheme and the holographic beam forming scheme.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114630338A (en) * | 2022-04-14 | 2022-06-14 | 北京邮电大学 | Beam management method and device under single-cell multi-user scene |
| CN114726417A (en) * | 2022-03-01 | 2022-07-08 | 杭州腓腓科技有限公司 | Power control method and device based on holographic multiple access |
| 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 |
-
2021
- 2021-09-07 CN CN202111044138.8A patent/CN113765565A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114726417A (en) * | 2022-03-01 | 2022-07-08 | 杭州腓腓科技有限公司 | Power control method and device based on holographic multiple access |
| 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 |
| CN114844539B (en) * | 2022-03-01 | 2024-04-16 | 杭州腓腓科技有限公司 | Resource allocation method and device based on holographic multiple access |
| CN114630338A (en) * | 2022-04-14 | 2022-06-14 | 北京邮电大学 | Beam management method and device under single-cell multi-user scene |
| CN114630338B (en) * | 2022-04-14 | 2024-02-02 | 北京邮电大学 | Beam management method and device in single-cell multi-user scene |
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