CN105634541B - Full duplex is taken can communication means and node - Google Patents
Full duplex is taken can communication means and node Download PDFInfo
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- CN105634541B CN105634541B CN201511018517.4A CN201511018517A CN105634541B CN 105634541 B CN105634541 B CN 105634541B CN 201511018517 A CN201511018517 A CN 201511018517A CN 105634541 B CN105634541 B CN 105634541B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
Abstract
The present invention provide a kind of full duplex take can communication means and node, this method include：Second transmitter of second node sends the first signal to the first receiver of first node, simultaneously under frequency, second receiver of second node receives the second signal that the first transmitter of first node is sent, second node carries out power distribution processing after the second receiver receives second signal, to the corresponding energy of second signal.During being somebody's turn to do, full duplex mode has worked for first node and second node, it finds signal simultaneously i.e. in same frequency range and receives signal, second node is after the second receiver receives second signal, power distribution processing is carried out to the corresponding energy of second signal, by combining CCFD technology with SWIPT technology, realize that realization is taken and can be communicated while improving the availability of frequency spectrum.
Description
Technical field
The present invention relates to the communication technologys more particularly to a kind of full duplex to take energy communication means and node.
Background technique
In view of the rare of radio spectrum resources, to improve wireless frequency spectrum utilization rate, while co-channel full duplex (Co-
Frequency Co-time Full Duplex, CCFD) become wireless communication technique one of core technology.This kind of communication party
Under formula, the node in communication system uses identical time, identical frequency, while emitting and receiving wireless signal, certain
The utilization rate of wireless frequency spectrum is improved in degree.
It wirelessly takes to communicate and refers in particular to wireless messages and energy simultaneous transmission (Simultaneous Information and
Power Transfer, SWIPT) technology.In SWIPT technology, the node in communication system in the case where energy constraint,
It can collect energy from radiofrequency signal, rather than the energy that the battery of simple dependence node is supplied.In this way, guaranteeing
While normal communication, further improve communication quality.
However, above-mentioned CCFD technology can only improve the availability of frequency spectrum, and while cannot achieve wireless messages and energy
Transmission；And transmission while be only able to achieve wireless messages and energy of SWIPT technology, the availability of frequency spectrum can not be improved.Therefore, how
CCFD technology is combined with SWIPT technology, actually industry urgent problem to be solved.
Summary of the invention
The present invention provide a kind of full duplex take can communication means and node, by by CCFD technology in conjunction with SWIPT technology
Get up, while improving the availability of frequency spectrum to realize, realization is taken and can be communicated.
First aspect, the embodiment of the present invention provide a kind of full duplex take can communication means, including：
Second transmitter of second node sends the first signal to the first receiver of first node；Also, described second
The second signal that second receiver of node is sent with the first transmitter for receiving the first node frequently simultaneously；
The second node carries out power distribution processing to the corresponding energy of the second signal.
Optionally, the second node carries out power distribution processing to the corresponding energy of the second signal, including：
The corresponding energy binned of the second signal is first part's energy and second part energy by the second node；
The second node carries out information decoding using first part's energy, is carried out using the second part energy
Collection of energy.
Optionally, the size of the second part energy is greater than the minimum value that energy is filled to the second node.
Optionally, this method further includes：
The second node eliminates interference of first signal to the second signal.
Optionally, the second transmitter of the second node sends the first signal, packet to the first receiver of first node
It includes：
Second transmitter of the second node is sent out in transmission power threshold value to the first receiver of the first node
Send first signal.
The second aspect, the embodiment of the present invention provide a kind of node, and the node is second node, the second node packet
It includes：
Second transmitter, for sending the first signal to the first receiver of first node；
Second receiver, the second signal for being sent simultaneously with the first transmitter for receiving the first node frequently；
Power divider, for carrying out power distribution processing to the corresponding energy of the second signal.
Optionally, the power divider is specifically used for the corresponding energy binned of the second signal being first part
Energy and second part energy are carried out information decoding using first part's energy, are carried out using the second part energy
Collection of energy.
Optionally, the size of the second part energy is greater than the minimum value that energy is filled to the second node.
Optionally, which further includes：
Processor, for eliminating interference of first signal to the second signal.
Optionally, second transmitter, specifically for being connect in transmission power threshold value to the first of the first node
Receipts machine sends first signal.
Full duplex provided in an embodiment of the present invention take can communication means and node, the second transmitter of second node is to first
First receiver of node sends the first signal, while under frequency, and the second receiver of second node receives the of first node
The second signal that one transmitter is sent, second node are corresponding to second signal after the second receiver receives second signal
Energy carries out power distribution processing.During being somebody's turn to do, full duplex mode has worked for first node and second node, i.e., in same frequency
It finds signal simultaneously in section and receives signal, second node is after the second receiver receives second signal, to second signal pair
The energy answered carries out power distribution processing, by combining CCFD technology with SWIPT technology, realizes and improves the availability of frequency spectrum
While, realization is taken and can be communicated.
Detailed description of the invention
Fig. 1 takes the system architecture schematic diagram that energy communication means is applicable in for full duplex of the present invention；
Fig. 2 is the flow chart that the full duplex that one embodiment of the invention provides takes energy communication means；
Fig. 3 is to be taken in energy communication means optimization process to the full duplex that one embodiment of the invention provides, using algorithms of different
Optimize the relational graph of obtained MMSE and SNR；
Fig. 4 is to be taken in energy communication means optimization process to the full duplex that one embodiment of the invention provides, using algorithms of different
Optimize the relational graph of obtained MMSE and the number of iterations；
Fig. 5 is the structural schematic diagram for the node that one embodiment of the invention provides；
Fig. 6 be another embodiment of the present invention provides node structural schematic diagram.
Specific embodiment
Fig. 1 takes the system architecture schematic diagram that energy communication means is applicable in for full duplex of the present invention.As described in Figure 1, this implementation
Example full duplex takes the system architecture that energy communication means is applicable in：The first segment that point is communicated using point-to-point communication mode
Point and second node, the first transmitter of the first node have N root transmitting antenna, and the second receiver has N root receiving antenna；
Similarly, the second transmitter of second node has N root transmitting antenna, and the second receiver has N root receiving antenna.The first node
Full duplex mode has worked with second node, i.e., sends signal simultaneously in same frequency range and receive signal.Wherein H indicates letter
Road, G indicate self-interference channel, and n indicates that additive white Gaussian noise, s indicate signal stream.
Please refer to Fig. 1 again, the present embodiment full duplex take can in the system architecture that is applicable in of communication means, the of second node
Two receivers have power distribution (Power Splitting, a PS) module, can connect to the second receiver of second node
The corresponding energy of the second signal received carries out power distribution processing.In the following, on the basis of the system architecture, it is complete to the present invention
Duplex is taken energy communication means and is described in detail.
Specifically, reference can be made to Fig. 2, Fig. 2 be the full duplex that provides of one embodiment of the invention take can communication means flow chart,
Including：
101, the second transmitter of second node sends the first signal to the first receiver of first node；Also, it is described
The second signal that second receiver of second node is sent with the first transmitter for receiving the first node frequently simultaneously.
In this step, full duplex mode has worked for first node and second node, i.e., finds simultaneously in same frequency range
Signal simultaneously receives signal.Specifically, the second transmitter of second node sends the first signal to the first receiver of first node,
Simultaneously under frequency, the second receiver of second node receives the second signal that the first transmitter of first node is sent.
102, the second node carries out power distribution processing to the corresponding energy of the second signal.
In this step, second node after the second receiver receives second signal, to the corresponding energy of second signal into
The processing of row power distribution.
Full duplex provided in an embodiment of the present invention take can communication means, the second transmitter of second node is to first node
First receiver sends the first signal, while under frequency, the second receiver of second node receives the first transmitting of first node
Machine send second signal, second node after the second receiver receives second signal, to the corresponding energy of second signal into
The processing of row power distribution.During being somebody's turn to do, full duplex mode has worked for first node and second node, i.e., same in same frequency range
Shi Faxian signal simultaneously receives signal, and second node is after the second receiver receives second signal, energy corresponding to second signal
Amount carries out power distribution processing, by combining CCFD technology with SWIPT technology, realizes and improves the same of the availability of frequency spectrum
When, realization is taken and can be communicated.
Optionally, in an embodiment of the present invention, the second node carries out function to the corresponding energy of the second signal
Rate allocation processing, including：The corresponding energy binned of the second signal is first part's energy and second by the second node
Portion of energy；The second node using first part's energy carry out information decoding, using the second part energy into
Row collection of energy.
Specifically, the corresponding energy of second signal that the PS module of second node receives the second receiver divides
Match, if β ∈ (0,1), then first part's energy is β times of the corresponding energy of second signal, and second part energy is second signal
The 1- β times of corresponding energy.
Optionally, in an embodiment of the present invention, the second node eliminates first signal to the second signal
Interference.
Fig. 1, H are please referred to again1Believe for the first transmitter of first node to the second receiver of second node transmitting second
Number channel, H2For second node the second transmitter to the first receiver of first node emit the first signal channel.Its
In, H1、H2For example, gaussian random channel, and known to channel information.G1Generation when carrying out full-duplex communication for first node
Self-interference channel, G2For second node carry out full-duplex communication when generation self-interference channel, G1、G2Have an impact to communication quality,
It needs to be eliminated.Channel formula is as follows：
In formula (1),Indicate estimation channel, GiIndicate real channel, Δ GiFor evaluated error caused by channel estimation,
Its mean value is 0, and variance is
Fig. 1, n are please referred to againiIt indicates additive white Gaussian noise (Additive White Gaussian Noise, AWGN),
Its covariance matrix isWherein,Indicate additive white Gaussian noise niVariance, INIndicate the unit matrix of N-dimensional.Thus
It is found that second node is node 2 using first node as node 1, the signal that node i ∈ { 1,2 } is received can be expressed as：
Assuming that the first signal, second signal are single flow data, then si∈CN×1, Fi∈CN×NIndicate sophisticated signal power normalizing
The beamforming transmission matrix of change is one of main optimization aim in simulation process.In formula (2), j when i ≠ j, i.e. i=1
J=1 when=2, i=2.Fig. 1 is please referred to again, since first node does not have PS device.Therefore, first node only carries out information decoding,
Second node also carries out collection of energy while carrying out information decoding.Therefore, for first node：
In conjunction with formula (1), the interference of full-duplex communication bring is eliminated, i.e. interference of the second signal to the first signal can obtain：
It enablesIt can then be obtained according to formula (4)：
For second node, the information of second node is decoded：
Similarly, it enablesIt can then be obtained according to formula (6)：
The ability of second node is collected：
In formula (8),Indicate F1Conjugate transposition, after second signal is allocated by power divider, second letter
The 1- β times energy of number corresponding energy, i.e. second part energy are used for the collection of energy.It should be noted that above-mentioned energy is received
Collection process only considered the second signal that the first transmitter of first node is sent, however, substantially, second node also uses entirely
Dual-mode communication, the first signal of part that the second transmitter is sent can be also collected, above-mentioned not consider to collect in collection of energy
The first signal arrived.
It is optimized in the following, taking energy communication means to above-mentioned full duplex.Specifically, in the present embodiment, using minimum equal
Square error (Minimizing Mean-Square-Error criterion, MMSE) takes above-mentioned full duplex can communication means
It optimizes.
Specifically, assuming that the MMSE of first node is J1, the MMSE of second node is J2, then：
In above-mentioned formula (9) and formula (10), W1、W2Respectively indicate first node, the signal of second node receives square
Battle array, S indicate to send the data fluxion of signal.It follows that when first node MMSE and second node MMSE's and it is minimum
When, the communication quality that above-mentioned full duplex takes energy communication means is optimal.
In addition, it is also necessary to consider following constraint condition：
Firstly, transmission power constraint condition.
In one embodiment of the invention, the second transmitter of the second node is in transmission power threshold value to the first segment
First receiver of point sends first signal.
For theoretically, to make MMSE minimum, then transmission power is the bigger the better.However, on the one hand in view of communication at
This problem, transmission power cross conference and the huge energy are brought to bear；On the other hand, transmission power is too big, is produced in communication process
Raw radiation can endanger bigger caused by human body.So the transmission power of first node and second node needs to meet centainly
Transmission power threshold value, i.e., no more than its transmission power limitation maximum value.Assuming that the transmission power threshold value of first node is
p1, the transmission power threshold value of second node is p2.Therefore：
Secondly, the constraint condition of second part energy.
Full duplex described in the embodiment of the present invention, which takes the system architecture that energy communication means is applicable in, has following features：The
One, first node and second node use full-duplex communication mode；The second, full duplex with wirelessly take to communicate and combined.Therefore, it is
Make first node send the first signal while to second node fill can, then the power divider of second node exists
When being allocated to the corresponding energy of second signal that the second receiver receives, the second part energy for collection of energy must
The minimum value that energy is filled to second node must be met, which is, for example, e.It can thus be concluded that：
In summary it is found that the problem of optimizing can be needed during communication means optimizes by taking to the full duplex stated：
In formula (13), Fi、WiFor optimized variable, the signal emission matrix and signal receiving matrix of node are represented.J1
+J2For optimization aim,For constraint condition one,For constraint condition two,For constraint condition three.
It is non-convex due to needing the problem of optimizing in formula (13).Therefore, iterative algorithm is introduced, will be needed in formula (13)
The problem of optimizing is split as 3 subproblems：
Subproblem one, the signal receiving matrix W for determining first node, second nodei。
Specifically, the signal emission matrix F of fixed first node, second nodei, make using LagrangeIt can thus be concluded that：
Bring formula (14) into formula (9), (10) can obtain：
It can be obtained according to formula (15)：
In above-mentioned formula (16), fi=vec (Fi),
P0i=Qi+wiIN,C=
c1+c2,
In this way, which above-mentioned subproblem one can be converted to formula (16).
The signal receiving matrix W obtained is solved in subproblem two, fixed subproblem onei, and the signal of fixed first node
Emission matrix F1, the signal emission matrix F of second node is determined with Lagrange2。
Subproblem three, fixed Wi、F2, determine the signal emission matrix F of first node1。
It is above-mentioned formula (13) is optimized during, following several algorithms can be used and optimize：Constant power algorithm,
Matlab kit solves (semi-definite relaxation, SDR) algorithm, (successive convex
Approximation), SCA) algorithm, the determination of suboptimum resolving Algorithm.
Specifically, when being optimized using above-mentioned algorithm, by inequality constraints conditionIt is converted toSo that optimization disaggregation reduces.The equation being converted to is brought into formula (16)Define one
Matrix U, the characteristic value of the matrix are all positive number and feature vector by P3-τINIt constitutes.Wherein,IN is N-dimensional unit matrix.
Enable f1=Ux, bringing constraint condition into can obtain：xHUH(P3-τIN)Ux≥0.In this way, which optimization problem can be exchanged into：
It can be solved with Lagrangian Arithmetic, computation complexity is greatly lowered.
In the following, the optimization of formula (13) is compared in four kinds of above-mentioned algorithms.Specifically, reference can be made to Fig. 3 and Fig. 4,
Fig. 3 is to be taken in energy communication means optimization process to the full duplex that one embodiment of the invention provides, and optimizes to obtain using algorithms of different
MMSE and SNR relational graph；Fig. 4 is to be taken in energy communication means optimization process to the full duplex that one embodiment of the invention provides,
The relational graph of the MMSE and the number of iterations that are optimized using algorithms of different.
Referring to figure 3., abscissa is signal-to-noise ratio (Signal Noise Ratio, SNR), and ordinate is mean square error
(Mean-Square-Error criterion, MSE).Curve in figure includes：4 dotted lines and 4 solid lines, wherein bandCurve indicate N=2, using constant power algorithm (Identity scheme)；BandCurve indicate N=4, using etc. function
Rate algorithm；BandCurve indicate N=2, using sub-optimal algorithm (propose suboptimal scheme)；BandCurve
Indicate N=4, using sub-optimal algorithm；Curve with zero indicates N=2, using SDR algorithm (propose SDR-base
scheme)；Band ● curve indicate N=4, using SDR algorithm；Curve with △ indicates N=2, using SCA algorithm (propose
SCA-base scheme)；Band ▲ curve indicate N=4, using SCA algorithm.When being optimized using constant power algorithm, only
Meet each constraint condition, does not do any optimization.According to simulation result：The performance of SDR algorithm is best；SCA is calculated
Method is taken second place, little compared to SDR difference；Suboptimization algorithm is poor compared to first two algorithm performance, but is significantly better than equal function
Rate algorithm.
Referring to figure 4., abscissa is the number of iterations, ordinate MSE.Curve in figure includes：4 dotted lines and 4
Solid line, wherein bandCurve indicate SNR=20, using constant power algorithm；BandCurve indicate SNR=40, using etc.
Power algorithm；BandCurve indicate SNR=20, using constant power algorithm；BandCurve indicates SNR=40, using suboptimum
Algorithm；Curve with zero indicates SNR=20, using SDR algorithm；Band ● curve indicate SNR=40, using SDR algorithm；Band △
Curve indicate SNR=20, using SCA algorithm；Band ▲ curve indicate SNR=40, using SCA algorithm.It can by simulation result
To find out that curve negotiating iterative algorithm tends to restrain, it ensures that the correctness of algorithm, wherein SCA convergence speed of the algorithm is most
Fastly.
According to above-mentioned：Full duplex described in the embodiment of the present invention take can communication means, full duplex in conjunction with SWIPT,
Moreover, because entire optimization problem is non-convex, iterative algorithm is introduced, it is convex that problem, which is become part,；Low complexity algorithm is introduced,
It is poor compared with existing algorithm in performance, but be greatly saved on computation complexity and calculate the time.
Fig. 5 is the structural schematic diagram of node that one embodiment of the invention provides, and node provided in this embodiment is specially the
Two nodes are node embodiments corresponding with Fig. 2 embodiment of the present invention, and details are not described herein for specific implementation process.Specifically, this
Embodiment provide node include：
Second transmitter 11, for sending the first signal to the first receiver of first node；
Second receiver 12, the second signal for being sent simultaneously with the first transmitter for receiving the first node frequently；
Power divider 13, for carrying out power distribution processing to the corresponding energy of the second signal.
Second transmitter of the second node that present example provides, second node is sent out to the first receiver of first node
The first signal is sent, while under frequency, the second receiver of second node receives the second of the first transmitter transmission of first node
Signal, second node carry out at power distribution the corresponding energy of second signal after the second receiver receives second signal
Reason.During being somebody's turn to do, full duplex mode has worked for first node and second node, i.e., finds signal simultaneously simultaneously in same frequency range
Signal is received, second node carries out power point after the second receiver receives second signal, to the corresponding energy of second signal
With processing, by combining CCFD technology with SWIPT technology, realize that realization is taken and can be led to while improving the availability of frequency spectrum
Letter.
Optionally, in an embodiment of the present invention, the power divider 13 is specifically used for the second signal is corresponding
Energy binned be first part's energy and second part energy, information decoding is carried out using first part's energy, is used
The second part energy carries out collection of energy.
Optionally, in an embodiment of the present invention, the size of the second part energy is greater than and fills to the second node
The minimum value of energy.
Fig. 6 be another embodiment of the present invention provides node structural schematic diagram, as shown in fig. 6, described in the present embodiment
Node on the basis of the structure shown in above-mentioned Fig. 5, further, further includes：
Processor 14, for eliminating interference of first signal to the second signal.
Optionally, in an embodiment of the present invention, second transmitter 11, be specifically used in transmission power threshold value to
First receiver of the first node sends first signal.
Those of ordinary skill in the art will appreciate that：Realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned includes：ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that：Its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (6)
1. a kind of full duplex takes energy communication means, which is characterized in that including；
Second transmitter of second node sends the first signal to the first receiver of first node；Also, the second node
The second receiver simultaneously with receive frequently the first node the first transmitter send second signal；
The second node carries out power distribution processing to the corresponding energy of the second signal；
The second node carries out power distribution processing to the corresponding energy of the second signal, including：
The corresponding energy binned of the second signal is first part's energy and second part energy by the second node；
The second node carries out information decoding using first part's energy, carries out energy using the second part energy
It collects；
The size of the second part energy is greater than the minimum value that energy is filled to the second node.
2. the method according to claim 1, wherein further including：
The second node eliminates interference of first signal to the second signal.
3. described in any item methods according to claim 1~2, which is characterized in that the second transmitter of the second node to
First receiver of first node sends the first signal, including：
Second transmitter of the second node sends institute to the first receiver of the first node in transmission power threshold value
State the first signal.
4. a kind of node, which is characterized in that the node is second node, and the second node includes：
Second transmitter, for sending the first signal to the first receiver of first node；
Second receiver, the second signal for being sent simultaneously with the first transmitter for receiving the first node frequently；
Power divider, for carrying out power distribution processing to the corresponding energy of the second signal；
The power divider is specifically used for the corresponding energy binned of the second signal being first part's energy and second
Divide energy, information decoding is carried out using first part's energy, collection of energy is carried out using the second part energy；
The size of the second part energy is greater than the minimum value that energy is filled to the second node.
5. node according to claim 4, which is characterized in that further include：
Processor, for eliminating interference of first signal to the second signal.
6. according to the described in any item nodes of claim 4~5, which is characterized in that
Second transmitter, specifically in transmission power threshold value to the first receiver of the first node send described in
First signal.
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| CN106253939B (en) * | 2016-08-25 | 2018-10-16 | 电子科技大学 | One kind being based on co-channel full duplex electromagnetic communication method while time reversal |
| CN106487482B (en) * | 2016-11-01 | 2019-06-14 | 山东交通学院 | A kind of power dividing method of full duplex relaying wireless messages and synchronous energy transmission |
| CN107104688B (en) * | 2017-03-20 | 2019-04-30 | 西安空间无线电技术研究所 | A kind of single-frequency strong jamming inhibition system applied to portable communications system |
| CN108736989B (en) * | 2018-05-30 | 2019-04-19 | 西北工业大学 | The implementation method that optimal secrecy handling capacity and high efficiency energy are collected in SWIPT system |
| CN109600816B (en) * | 2018-10-09 | 2021-07-30 | 长沙理工大学 | Interference-aware wireless energy-carrying transmission routing method |
| CN113473388B (en) * | 2021-06-30 | 2022-10-14 | 河南大学 | NOMA full-duplex user cooperation secret transmission method based on artificial noise |
| CN114339708B (en) * | 2022-03-16 | 2022-06-14 | 华南理工大学 | Wireless energy-carrying communication method, system and communication equipment based on time slot switching |
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