CN108988912A - Transceiver combined optimization method and device - Google Patents
Transceiver combined optimization method and device 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
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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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
- H04B7/022—Site diversity; Macro-diversity
- H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03891—Spatial equalizers
- H04L25/03898—Spatial equalizers codebook-based design
- H04L25/0391—Spatial equalizers codebook-based design construction details of matrices
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Abstract
The present invention provides a kind of transceiver combined optimization method and device, applied to the wireless energy supply MIMO relay system based on TS agreement.The described method includes: obtaining the first channel matrix, second channel matrix, energy conversion rate, nominal power, the first peak power and the second peak power；Singular value decomposition is carried out to the first channel matrix and second channel matrix respectively, obtains the first diagonal matrix and the second diagonal matrix；The time-switching factor of the system, the first pre-coding matrix, the second pre-coding matrix and third pre-coding matrix are optimized according to energy constraint condition and power constraints according to nominal power, the first peak power, the second peak power, energy conversion rate, the first diagonal matrix and the second diagonal matrix.The method can optimize the communication process of each node of wireless energy supply MIMO relay system, to enhance the effectiveness of the system.
Description
Technical field
The present invention relates to data communication technology fields, in particular to a kind of transceiver combined optimization method and device.
Background technique
With the continuous development of data communication technology, MIMO (Multiple-Input Multiple-Output, multi input
Multi output) communication technology application it is more extensive.But for now, existing MIMO relay communications system is based on specified function
The mode that rate transmits progress power constraint to signal realizes signal transmission communication.MIMO relay communications system passes through this communication party
When formula carries out signal communication, it will receive the limitation of rated power and cause the effectiveness of communication system low.
Summary of the invention
In order to overcome above-mentioned deficiency in the prior art, the purpose of the present invention is to provide a kind of transceiver combined optimization sides
Method and device, the method can optimize the communication process of each node of wireless energy supply MIMO relay system, to enhance
The effectiveness of the relay system.
For method, the embodiment of the present invention provides a kind of transceiver combined optimization method, is applied to be based on time-switching
The wireless energy supply multiple-input and multiple-output MIMO relay system of TS (Time Switching) agreement, the system comprises source node,
Relay node and destination node, wherein the relay node, which sends energy signal by the source node, carries out wireless energy supply in the future
The destination node is transferred to from the information signal of the source node, which comprises
Obtain the first channel matrix, the relay node and the purpose between the source node and the relay node
The energy conversion rate of second channel matrix, energy signal of the relay node reception from the source node between node,
The first peak power on nominal power, the source node on the source node and the second peak work on the relay node
Rate；
Singular value decomposition is carried out to first channel matrix and the second channel matrix respectively, obtains first letter
Corresponding first diagonal matrix of road matrix and corresponding second diagonal matrix of the second channel matrix；
According to the nominal power, first peak power, second peak power, the energy conversion rate, institute
State the first diagonal matrix and second diagonal matrix according to energy constraint condition and power constraints to the system when
Between switching factor, the first pre-coding matrix that energy signal is used for transmission on the source node, be used for transmission on the source node
Of the information signal from the source node is used for transmission on the second pre-coding matrix and the relay node of information signal
Three pre-coding matrixes optimize.
For device, the embodiment of the present invention provides a kind of transceiver combined optimization device, is applied to be based on time-switching
The wireless energy supply multiple-input and multiple-output MIMO relay system of TS agreement, the system comprises source node, relay node and purpose sections
Point, wherein the relay node, which sends energy signal by the source node, carries out wireless energy supply with will be from the letter of the source node
Information signal is transferred to the destination node, and described device includes:
Data obtaining module, for obtaining the first channel matrix between the source node and the relay node, described
Second channel matrix, the relay node between relay node and the destination node receive the energy from the source node
The energy conversion rate of signal, the nominal power on the source node, the first peak power on the source node and the relaying
The second peak power on node；
Matrix decomposition module, for carrying out singular value point to first channel matrix and the second channel matrix respectively
Solution, obtains corresponding first diagonal matrix of first channel matrix and the corresponding second pair of angular moment of the second channel matrix
Battle array；
Combined optimization module, for according to the nominal power, first peak power, second peak power,
The energy conversion rate, first diagonal matrix and second diagonal matrix are according to energy constraint condition and power constraint item
Part is to the first pre-coding matrix, described for being used for transmission energy signal on the time-switching factor of the system, the source node
It is used for transmission on the second pre-coding matrix and the relay node of information signal to be used for transmission on source node and be saved from the source
The third pre-coding matrix of the information signal of point optimizes.
In terms of existing technologies, transceiver combined optimization method and device provided in an embodiment of the present invention have following
The utility model has the advantages that the method can carry out the side of combined optimization to the corresponding transceivers parameters of wireless energy supply MIMO relay system
Formula optimizes the communication process of each node of the relay system, thus enhance the effectiveness of the relay system, wherein
The transceivers parameters include the time-switching factor of the system, are used for transmission the first pre- of energy signal on the source node
It is used for transmission on encoder matrix, the source node on the second pre-coding matrix and the relay node of information signal for passing
The third pre-coding matrix of the defeated information signal from the source node.The method is applied to wireless energy supply MIMO relaying system
System, the system comprises source node, relay node and destination nodes, wherein the relay node sends energy by the source node
Signal carries out wireless energy supply so that the information signal from the source node is transferred to the destination node, the source node, institute
It states DF (Decode-and-Forward the decodes forward pass) technology of relay node and the destination node based on TS agreement and carries out letter
Signal communication.Firstly, the method obtains the first channel matrix, relaying section between the source node and the relay node
Second channel matrix, the relay node between point and the destination node receive the energy signal from the source node
On energy conversion rate, the nominal power on the source node, the first peak power on the source node and the relay node
The second peak power.Then, the method respectively carries out first channel matrix and the second channel matrix unusual
Value is decomposed, and obtains corresponding first diagonal matrix of first channel matrix and the second channel matrix is second pair corresponding
Angular moment battle array.Finally, the method is according to the nominal power, first peak power, second peak power, the energy
Conversion ratio, first diagonal matrix and second diagonal matrix are measured according to energy constraint condition and power constraints to institute
The first pre-coding matrix, the source node stated the time-switching factor of system, be used for transmission energy signal on the source node
On be used for transmission on the second pre-coding matrix and the relay node of information signal and be used for transmission the letter from the source node
The third pre-coding matrix of information signal optimizes, to be described in adjusting and optimizing by way of energy constraint and power constraint
The time-switching factor of system and each pre-coding matrix, to improve the relay system to the efficiency of transmission of signal and transmission data
Amount.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, present pre-ferred embodiments are cited below particularly,
And cooperate appended attached drawing, it is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of the claims in the present invention protection scope, for those of ordinary skill in the art, what is do not made the creative labor
Under the premise of, it can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is a kind of flow diagram of transceiver combined optimization method provided in an embodiment of the present invention.
Fig. 2 is a kind of flow diagram for the sub-step that step S230 shown in Fig. 1 includes.
Fig. 3 is another flow diagram of transceiver combined optimization method provided in an embodiment of the present invention.
Fig. 4 is a kind of block diagram of transceiver combined optimization device provided in an embodiment of the present invention.
Fig. 5 is another block diagram of transceiver combined optimization device provided in an embodiment of the present invention.
Icon: 100- transceiver combined optimization device；110- data obtaining module；120- matrix decomposition module；130- connection
Close optimization module；140- configuration module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " first ", " second ", " third " etc. are only used for distinguishing and retouch
It states, is not understood to indicate or imply relative importance.
With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
Fig. 1 is please referred to, is a kind of flow diagram of transceiver combined optimization method provided in an embodiment of the present invention.At this
In inventive embodiments, the transceiver combined optimization method is applied to the wireless energy supply MIMO relay system based on TS agreement, uses
In carrying out combined optimization to the corresponding transceivers parameters of the wireless energy supply MIMO relay system, to each node of the system
Communication process optimizes.Wherein, the wireless energy supply MIMO relay system is based on DF technology and carries out signal communication, described wireless
Energy supply MIMO relay system includes the source node, relay node and destination node being in communication with each other, and the source node is to the relaying
Node sends energy signal to carry out radio function to the relay node, and the source node sends information to the relay node
Signal is based on the energy signal corresponding energy by the relay node and the information signal is transferred to the purpose section
Point, to realize the communication process of wireless energy supply MIMO relay system.Wherein, the corresponding transceivers parameters of the system include institute
The first pre-coding matrix, the source node stated the time-switching factor of system, be used for transmission energy signal on the source node
On be used for transmission on the second pre-coding matrix and the relay node of information signal and be used for transmission the letter from the source node
The third pre-coding matrix of information signal.
In the present embodiment, if the signal that wireless energy supply MIMO relay system carries out transmission communication to an information signal passes
When the defeated period is T, which can be divided into three periods, a length of α T when first time period corresponds to, at this time by source
Energy signal is sent to the relay node by node；(1- α) T/2 a length of when second time period corresponds to, at this time will by source node
Information signal is sent to the relay node；It is also (1- α) T/2 that the third period, which corresponds to duration, at this time by the relay node
Energy is corresponded to using the energy signal, and the information signal is sent to the destination node.Wherein, α is the system
The time-switching factor, numerical value is greater than 0 and less than 1.Below to the detailed process of transceiver combined optimization method shown in FIG. 1 and
Step is described in detail.
Step S210 obtains the first channel matrix, the relay node and purpose section between source node and relay node
Second channel matrix, the relay node between point receive the energy conversion rate of the energy signal from the source node, institute
State the nominal power on source node, the first peak power on the source node and the second peak work on the relay node
Rate.
In the present embodiment, there are the additive white Gaussian noises that mean value is 0 between the source node and the relay node
vr, there are the additive white Gaussian noise v that mean value is 0 between the relay node and the destination noded, therefore to the relaying
For node, the additive white Gaussian noise v between the source node and the relay node can be usedrVarianceDescribed in expression
The power of anti-interference ability when relay node reception signal；For destination node, the relay node and the mesh can be used
Node between additive white Gaussian noise vdVarianceIndicate the anti-interference ability when relay node receives signal
It is strong and weak.
In the present embodiment, multiple days be may be provided in the source node, the relay node and the destination node
Line, wherein the number of antennas on the source node can use NsIt indicates, the number of antennas on the relay node can use NrIt indicates, institute
N can be used by stating the number of antennas in destination nodedIt indicates, then first channel matrix is Nr×NsChannel matrix, H can be used
It indicates；The second channel matrix is Nd×NrChannel matrix, can be indicated with G.
In the present embodiment, the nominal power indicates the mean power that the source node can be got, and can use PSTable
Show；The energy conversion rate indicates the relay node after receiving the energy signal from the source node from the energy
The transfer efficiency of corresponding energy is extracted in signal, can be indicated with η；The first peak value power meter shows the maximum of the source node
Transimission power can use Pm,sIt indicates；Second peak power indicates the maximum transmission power of the relay node, can use Pm,rTable
Show.
Step S220 carries out singular value decomposition to first channel matrix and the second channel matrix respectively, obtains
Corresponding first diagonal matrix of first channel matrix and corresponding second diagonal matrix of the second channel matrix.
In the present embodiment, the method by respectively to first channel matrix H and the second channel matrix G into
First channel matrix H and the second channel matrix G can be indicated by row singular value decomposition with following formula:
Wherein, ΛhIndicate corresponding first diagonal matrix of the first channel matrix H, UhIndicate the first channel matrix H singular value
Corresponding left side submatrix, V after decompositionhIndicate corresponding right side submatrix after the first channel matrix H singular value decomposition, ΛgIt indicates
Corresponding second diagonal matrix of second channel matrix G, UgThe corresponding sub- square in left side after expression second channel matrix G singular value decomposition
Battle array, VgCorresponding right side submatrix after expression second channel matrix G singular value decomposition, ()HIndicate Hermit conjugate transposition.First
Each diagonal element is arranged successively according to descending order in corresponding first diagonal matrix of channel matrix H, the second channel matrix G
Each diagonal element is arranged successively according to descending order in corresponding second diagonal matrix.
Step S230, according to the nominal power, first peak power, second peak power, the energy
Conversion ratio, first diagonal matrix and second diagonal matrix are according to energy constraint condition and power constraints to described
The time-switching factor of system, the first pre-coding matrix on the source node, the second pre-coding matrix on the source node,
And the third pre-coding matrix on the relay node optimizes.
In the present embodiment, first pre-coding matrix is used for transmission energy signal to the relay node, and described the
Two pre-coding matrixes are used for transmission information signal to the relay node, and the third pre-coding matrix is used for transmission from described
The information signal of source node gives the destination node.The system is needed when carrying out transmission communication to an information signal
The source node is sent to the relay node after carrying out precoding to energy signal by the first pre-coding matrix, then in institute
It states after source node carries out precoding to information signal by the second pre-coding matrix and is sent to the relay node.The relaying section
Point is after receiving the information signal after the energy signal and coding after coding, after to the energy signal and coding after coding
Information signal be decoded, obtain the energy signal and correspond to energy and the information signal corresponding informance, and pass through third
It, will be through institute based on the corresponding energy of the energy signal after pre-coding matrix carries out precoding to the information signal corresponding informance
The information signal for stating the processing of third pre-coding matrix is sent to the destination node.
It wherein, is N by the energy signal that the source node is sent1× 1 signal vector s1, corresponding described first
Pre-coding matrix is to use B1The N of expressions×N1Encoder matrix.It is N by the information signal that the source node is sent2× 1
Signal vector s2, corresponding second pre-coding matrix is to use B2The N of expressions×N2Encoder matrix.The third precoding
Matrix is the N indicated with Fr×N2Encoder matrix, it is corresponding by the third pre-coding matrix coding after and by the relaying section
The information signal that point is transferred directly to the destination node is N2× 1 signal vector
In the present embodiment, there are energy constraint condition and power constraints in the system.The power constraint item
Part includes and the first peak value power Pm,sCorresponding first peak value constraint condition, and with the second peak power Pm,rCorresponding second peak
It is worth constraint condition, the first peak value constraint condition requires the transimission power on the source node no more than first peak work
Rate Pm,s, the second peak value constraint condition requires the transimission power on the relay node no more than second peak power
Pm,r.The energy constraint condition can be used following formula to be indicated:
Wherein, the mark of tr () representing matrix, PSIndicate the current nominal power of source node, MI () indicate source node with
Interactive information between destination node, ()HIndicate Hermit conjugate transposition.In the present embodiment, the method to system when
Between switching factor α, the first pre-coding matrix B on the source node1, the second pre-coding matrix B on the source node2And institute
When stating third pre-coding matrix F on relay node and carrying out optimal value optimization, all need to meet above-mentioned energy constraint condition and above-mentioned
Power constraints can realize the combined optimization of the communication process to the system.
In the present embodiment, interactive information MI (α, the B in above-mentioned energy constraint condition2, F) and it can be indicated with following formula:
Wherein,It is a N2×N2Unit matrix, | | representing matrix determinant,Indicate the source node and institute
State the additive white Gaussian noise v between relay noderVariance,It indicates between the relay node and the destination node
Additive white Gaussian noise vdVariance, N2Numerical value be not more than min { rank (H), rank (G) }, rank () representing matrix
Order, the meaning that remaining character represents can refer to described above.
In the present embodiment, the method is obtaining first channel matrix H and the second channel matrix G is respectively right
It, can be according to the first pre-coding matrix B after the singular value decomposition expression formula answered1, the second pre-coding matrix B2And described
Incidence relation between three pre-coding matrix F and first channel matrix H and the second channel matrix G, by described first
Pre-coding matrix B1, the second pre-coding matrix B2And the corresponding optimum structure of the third pre-coding matrix F is according to such as
Lower formula is indicated:
Wherein, ()*Indicate optimal value, λbIndicate the first pre-coding matrix B1Corresponding positive definite scalar, vh,1Indicate first
The corresponding right side submatrix V of channel matrix HhFirst row, Vh,1Indicate the corresponding right side submatrix V of the first channel matrix HhFar Left
N2Column, Λ2Indicate the second pre-coding matrix B2Corresponding N2×N2Diagonal matrix, Vg,1Indicate that second channel matrix G is corresponding right
Side submatrix VgLeftmost N2Column, ΛfIndicate the corresponding N of third pre-coding matrix F2×N2Diagonal matrix.
At this point, the formula of the above-mentioned transceivers parameters optimisation criteria with matrix variables for indicating energy constraint condition
Son includes the first peak value constraint condition and the second peak value constraint condition in conjunction with the power constraints, available following
The power distribution optimization formula for indicating power distribution optimisation criteria with scalar variable:
Wherein,λ2,iIndicate Λ2I-th pair
Angle element, λf,iIndicate ΛfI-th of diagonal element, ()TThe transposition of representing matrix, corresponding first peak value of the source node
Expression formula of the constraint condition in above-mentioned power distribution optimization formula is 0 < λb≤PM, s The relay node pair
The the second peak value constraint condition answered optimizes the expression formula in formula in above-mentioned power distribution
In the present embodiment, the method introducesThen to i=1, N2There are following parameters:
Wherein, xiIndicate the corresponding first foundation component of the system, yiIndicate corresponding second basis point of the system
Amount, aiIndicate the corresponding third basis component of the system, biIndicate the corresponding 4th basic component of the system, λh,iIt indicates
ΛhI-th of diagonal element, λg,iIndicate ΛgI-th of diagonal element.
And the time-switching factor-alpha given for one, it can be indicated with relaxation component tPower distribution optimization formula above-mentioned at this time can be exchanged into following
Systematic component optimization formula is indicated:
At this point, the first foundation component xiIn the presence of for solving first foundation component xiThe secondary of optimum structure indicate
Equation is as follows:
Described second basic component yiIn the presence of for solving the second basic component yiThe secondary of optimum structure indicate equation such as
Shown in lower:
In the present embodiment, the method can be by solving optimal time-switching factor-alpha*, optimal loose component t*, most
Excellent first foundation componentAnd the second optimal basic componentMode, it is corresponding optimal described to obtain the system
First pre-coding matrix B1 *, the optimal second pre-coding matrix B2 *, the optimal third pre-coding matrix F*, realization pair
The transceivers parameters combined optimization of the system.
It referring to figure 2., is a kind of flow diagram for the sub-step that step S230 includes shown in Fig. 1.In the present invention
In embodiment, the step S230 includes sub-step S231, sub-step S232, sub-step S233 and sub-step S234.
Sub-step S231, according to the first diagonal matrix, the second diagonal matrix, nominal power, the first peak power, the second peak
Value power and energy conversion rate calculate that acquire the system for meeting power constraints current optimal based on golden section search
The time-switching factor, and accordingly obtain meeting the corresponding optimal positive definite scalar of the first pre-coding matrix of power constraints,
Optimal diagonal matrix corresponding to optimal diagonal matrix and third pre-coding matrix corresponding to two pre-coding matrixes.
In the present embodiment, the method is according to the first diagonal matrix ΛhAnd the second diagonal matrix ΛgIt calculates
The corresponding third basis component a of the systemiAnd the corresponding 4th basic component b of the systemi, wherein i=1, N2。
Then the method will be according to the first peak value power Pm,s, the second peak power Pm,r, the third basis component aiAnd institute
State the 4th basic component biOptimal time-switching factor-alpha is solved according to golden section search*, and in α*Solution procedure in
The first pre-coding matrix B is obtained based on above-mentioned system parameter optimization formula1Corresponding optimal positive definite scalar lambdab *, described
Two pre-coding matrix B2Corresponding optimal diagonal matrix Λ2 *And it is optimal to angular moment corresponding to the third pre-coding matrix F
Battle array Λf *。
Wherein, the method can acquire the optimal time-switching factor-alpha by following similar program in machine code*, it is described
First pre-coding matrix B1Corresponding optimal positive definite scalar lambdab *, the second pre-coding matrix B2Corresponding optimal diagonal matrix
Λ2 *And optimal diagonal matrix Λ corresponding to the third pre-coding matrix Ff *:
Initialization:αl=0 and αu=1；
While|αu-αl|>εdo
Defineν1=(δ -1) αl+(2-δ)αu andν2=(2- δ) αl+(δ-1)αu；
Based on α=ν1It solves above system component and optimizes formula, obtain α=ν1When optimal loose component t*, optimal
One basic componentAnd the second optimal basic componentAnd it is based on α=ν1Calculate F (ν1)；
Based on α=ν2It solves above system component and optimizes formula, obtain α=ν2When optimal loose component t*, optimal
One basic componentAnd the second optimal basic componentAnd it is based on α=ν2Calculate F (ν2)；
α*=(αu+αl)/2；
Wherein, ε is the normal number close to 0, and descending factors δ is equal to 1.618, ()*Indicate optimal value, αlIt is cut for the time
Change the lower numerical limit of factor-alpha, αuFor the limit value of time-switching factor-alpha, ν1With ν2When solving optimal for golden section search
Between switching factor α*During iteration occur switching factor, λb *For the first pre-coding matrix B1Corresponding optimal positive definite
Scalar,For the second pre-coding matrix B2Corresponding optimal diagonal matrix Λ2 *I-th of diagonal element,For institute
State optimal diagonal matrix Λ corresponding to third pre-coding matrix Ff *I-th of diagonal element, function F (α) is availableIt indicates, M (α) is α corresponding in systematic component optimization formulaValue.
It is understood that above-mentioned program in machine code is only a kind of embodiment of the embodiment of the present invention, it is not construed as
Limiting the scope of the present invention.In the present embodiment, it accordingly obtains meeting power constraints in the sub-step S231
The corresponding optimal positive definite scalar of the first pre-coding matrix, optimal diagonal matrix and third corresponding to the second pre-coding matrix
The step of optimal diagonal matrix corresponding to pre-coding matrix includes:
During calculating the optimal time-switching factor, it is based on the nominal power, first pair of angular moment
Diagonal element set, the diagonal element set of second diagonal matrix, the energy conversion rate and each iteration of battle array occur
Switching factor, according to binary search calculate the first peak value of satisfaction corresponding with the switching factor that the iteration occurs constraint item
The optimal first foundation component of part, and meet the basic component of optimal second of the second peak value constraint condition；
The optimal first foundation component according to corresponding to the optimal time-switching factor being finally calculated and
The basic component of optimal second and the first foundation component, the second basic component, first pre-coding matrix pair
Corresponding to diagonal matrix corresponding to the positive definite scalar answered, second pre-coding matrix and the third pre-coding matrix pair
The corresponding optimal positive definite scalar of first pre-coding matrix, described second is calculated in advance in incidence relation between angular moment battle array
Optimal diagonal matrix corresponding to optimal diagonal matrix corresponding to encoder matrix and the third pre-coding matrix.
Wherein, described to calculate the first peak value of satisfaction corresponding with the switching factor that the iteration occurs according to binary search
The optimal first foundation component of constraint condition, and meet the execution of the basic component of optimal second of the second peak value constraint condition
Journey is in above-mentioned program in machine code " based on α=ν1It solves above system component and optimizes formula, obtain α=ν1When optimal relaxation point
Measure t*, optimal first foundation componentAnd the second optimal basic component" and " be based on α=ν2Solve above system component
Optimize formula, obtains α=ν2When optimal loose component t*, optimal first foundation componentAnd the second optimal basic component" process, wherein ν1With ν2Optimal time switching factor α is solved for golden section search*During iteration occur
Switching factor.The available following similar program in machine code of the implementation procedure indicates:
Initialization:tl and tu；
While|tu-tl|>εdo
t*=(αu+αl)/2；
Wherein the numerical value of β solves the first base using binary search
Plinth component xiSlackness complementation equationIt obtains；
Wherein the numerical value of γ solves second using binary search
Basic component yiSlackness complementation equationIt obtains；
Judge x0Whether meet the first peak value constraint condition, judges y0Whether second peak value constraint condition is met；
According to judging result and first foundation component xiSecondary indicate equation and the second basic component yiSecondary expression side
Current optimal loose component t is calculated in journey*, optimal first foundation componentAnd the second optimal basic component
Wherein, tlFor the lower numerical limit of relaxation component t, tuFor the limit value of relaxation component t, t0For based on the iteration
The switching factor of appearance calculates corresponding calculated loose component, x in the execution circulation of optimal loose component0For with t0It is corresponding
Based on first foundation component xiThe first foundation component that is calculated of slackness complementation equation (as shown above), y0For with t0It is right
Answer based on the second basic component yiThe second basic component for being calculated of slackness complementation equation (as shown above).
In the present embodiment, described that the switching factor ν occurred with the iteration is calculated according to binary search1Or ν2It is corresponding
Satisfaction the first peak value constraint condition optimal first foundation componentAnd meet the optimal of the second peak value constraint condition
Second basic componentThe step of include:
In the switching factor ν occurred based on the iteration1Or ν2Calculate optimal loose component t*Circulation in, according to two points
Search method respectively to calculated loose component t0The matched first foundation component xiSlackness complementation equation and described
Second basic component yiSlackness complementation equation solved, obtain corresponding first foundation component x0And the second basic component
y0；
Judge calculated first foundation component x0Whether meet the first peak value constraint condition, judges calculated
Two basic component y0Whether second peak value constraint condition is met；
If the first foundation component x0Meet the first peak value constraint condition, and the described second basic component y0Meet
Second peak value constraint condition, then with the calculated loose component t0, the first foundation component x0And second basis point
Measure y0Respectively as time optimal loose component t of circulation*, optimal first foundation componentAnd the second optimal basic component
Wherein, the method is by by x0It substitutes intoThe mode verified, judges x0Whether described is met
One peak value constraint condition.The method is by by y0It substitutes intoThe mode verified, judges y0It is
It is no to meet the second peak value constraint condition.
In the present embodiment, described that the switching factor ν occurred with the iteration is calculated according to binary search1Or ν2It is corresponding
Satisfaction the first peak value constraint condition optimal first foundation componentAnd meet the optimal of the second peak value constraint condition
Second basic componentThe step of further include:
If the first foundation component x0Meet the first peak value constraint condition, and the described second basic component y0It is discontented
The second peak value constraint condition of foot, then with the calculated first foundation component x0As when time optimal first foundation of circulation
ComponentThe second basic component y is solved according to water floodiCorresponding secondary expression equation is obtained when time optimal second of circulation
Basic componentAnd based on the second optimal basic componentIt calculates and acquires as time optimal loose component t of circulation*。
Wherein, the method is solving the second basic component y according to water floodiCorresponding secondary expression equation is obtained when secondary
The basic component of optimal second of circulationIt afterwards, will be according to formulaCalculating is acquired when secondary
The optimal loose component t of circulation*。
In the present embodiment, described that the switching factor ν occurred with the iteration is calculated according to binary search1Or ν2It is corresponding
Satisfaction the first peak value constraint condition optimal first foundation componentAnd meet the optimal of the second peak value constraint condition
Second basic componentThe step of further include:
If the first foundation component x0It is unsatisfactory for the first peak value constraint condition, and the described second basic component y0It is full
The second peak value constraint condition of foot, then with the calculated described second basic component y0As the second optimal basis when time circulation
ComponentFirst foundation component x is solved according to water floodiCorresponding secondary expression equation is obtained when time optimal first of circulation
Basic componentAnd based on the optimal first foundation componentIt calculates and acquires as time optimal loose component t of circulation*。
Wherein, the method is solving first foundation component x according to water floodiCorresponding secondary expression equation is obtained when secondary
The optimal first foundation component of circulationIt afterwards, will be according to formulaCalculating, which acquires, works as
The optimal loose component t of secondary circulation*。
In the present embodiment, described that the switching factor ν occurred with the iteration is calculated according to binary search1Or ν2It is corresponding
Satisfaction the first peak value constraint condition optimal first foundation componentAnd meet the optimal of the second peak value constraint condition
Second basic componentThe step of further include:
If the first foundation component x0It is unsatisfactory for the first peak value constraint condition, and the described second basic component y0No
Meet the second peak value constraint condition, then solves first foundation component x respectively according to water floodiIt is corresponding secondary to indicate equation and the
Two basic component yiThe corresponding secondary optimal first foundation component for indicating equation, obtaining working as secondary circulationAnd optimal second
Basic component
It is based respectively on the optimal first foundation componentAnd the second optimal basic componentCalculating acquires two
A corresponding loose component of optimal basic component, and choose the lesser relaxation of numerical value in calculated two loose components
Component is as time optimal loose component t of circulation*。
Wherein, based on the optimal first foundation componentThe numerical value for the relaxation component being calculated isBased on the optimal second basic componentThe numerical value for the relaxation component being calculated isThen as the optimal loose component t of secondary circulation*Numerical value is smaller in as above-mentioned two loose component
Relaxation component.
In the present embodiment, the method acquires the optimal time-switching factor-alpha*, and obtain golden section and search
The matched optimal first foundation component of switching factor occurred in rope method implementation process with last time iterationAnd it is optimal
Second basic componentIt afterwards, will be with the optimal first foundation componentAnd the second optimal basic componentRespectively
As with the optimal time-switching factor-alpha*Corresponding optimal first foundation componentAnd the second optimal basis
ComponentAnd the first pre-coding matrix B is calculated1Corresponding optimal positive definite scalar lambdab *, second pre-coding matrix
B2Corresponding optimal diagonal matrix Λ2 *And optimal diagonal matrix Λ corresponding to the third pre-coding matrix Ff *。
Sub-step S232, in advance according to the current corresponding optimal positive definite scalar of first pre-coding matrix and described first
Current optimal the first precoding square is calculated in incidence relation between encoder matrix and first channel matrix
Battle array.
Sub-step S233, in advance according to the current corresponding optimal diagonal matrix of second pre-coding matrix and described second
Current optimal the second precoding square is calculated in incidence relation between encoder matrix and first channel matrix
Battle array.
Sub-step S234, it is pre- according to the current corresponding optimal diagonal matrix of the third pre-coding matrix and the third
The current optimal third precoding square is calculated in incidence relation between encoder matrix and the second channel matrix
Battle array.
In the present embodiment, the method is obtaining the optimal time-switching factor-alpha*, the first precoding square
Battle array B1Corresponding optimal positive definite scalar lambdab *, the second pre-coding matrix B2Corresponding optimal diagonal matrix Λ2 *And institute
State optimal diagonal matrix Λ corresponding to third pre-coding matrix Ff *Afterwards, according to the first pre-coding matrix B1, it is described
Second pre-coding matrix B2And the optimum structure expression formula of the third pre-coding matrix FBe calculated the system it is corresponding three it is optimal pre-
Encoder matrix.
Step S240 configures the signal transmission cycle of the system using the time-switching factor after optimization, using optimization
The first pre-coding matrix and the second pre-coding matrix afterwards configures the source node, and using the third pre-coding matrix after optimization
The relay node is configured, so that the time-switching factor of the system based on the pre-coding matrix after optimization and after optimization carries out
Communication.
It referring to figure 4., is a kind of block diagram of transceiver combined optimization device 100 provided in an embodiment of the present invention.
In embodiments of the present invention, the transceiver combined optimization device 100 is applied to the above-mentioned wireless energy supply based on TS agreement
MIMO relay system, the transceiver combined optimization device 100 include data obtaining module 110, matrix decomposition module 120 and connection
Close optimization module 130.
The data obtaining module 110, for obtain the first channel matrix between source node and relay node, it is described in
The energy signal from the source node is received after second channel matrix, the relay node between node and destination node
On energy conversion rate, the nominal power on the source node, the first peak power on the source node and the relay node
The second peak power.
In the present embodiment, the data obtaining module 110 can execute step S210 shown in Fig. 1, specifically retouch
Stating can refer to above to the detailed description of step S210.
The matrix decomposition module 120, for being carried out respectively to first channel matrix and the second channel matrix
Singular value decomposition obtains corresponding first diagonal matrix of first channel matrix and the second channel matrix corresponding
Two diagonal matrix.
In the present embodiment, the matrix decomposition module 120 can execute step S220 shown in Fig. 1, specifically retouch
Stating can refer to above to the detailed description of step S220.
The combined optimization module 130, for according to the nominal power, first peak power, second peak
It is worth power, the energy conversion rate, first diagonal matrix and second diagonal matrix according to energy constraint condition and function
Rate constraint condition is to the first precoding square for being used for transmission energy signal on the time-switching factor of the system, the source node
It is used for transmission to be used for transmission on the second pre-coding matrix and the relay node of information signal in battle array, the source node and come from
The third pre-coding matrix of the information signal of the source node optimizes.
In the present embodiment, the combined optimization module 130 can execute institute in step S230 and Fig. 2 shown in Fig. 1
Sub-step S231, sub-step S232, sub-step S233 and the sub-step S234 shown, specific description can refer to above to step
The detailed description of S220, sub-step S231, sub-step S232, sub-step S233 and sub-step S234.
It referring to figure 5., is another box signal of transceiver combined optimization device 100 provided in an embodiment of the present invention
Figure.In embodiments of the present invention, the transceiver combined optimization device 100 can also include configuration module 140.
The configuration module 140, for configuring the signal transmission week of the system using the time-switching factor after optimization
Phase, using after optimization the first pre-coding matrix and the second pre-coding matrix configure the source node, and using the after optimization
Three pre-coding matrixes configure the relay node, so that the system is based on the pre-coding matrix after optimization and the time after optimization
Switching factor is communicated.
In conclusion the method can be to wireless in transceiver combined optimization method provided by the invention and device
Energize the mode that the corresponding transceivers parameters of MIMO relay system carry out combined optimization, the communication to each node of the relay system
Journey optimizes, to enhance the effectiveness of the relay system, wherein the transceivers parameters include the system
The first pre-coding matrix of energy signal is used for transmission in the time-switching factor, the source node, on the source node for passing
The information signal from the source node is used for transmission on the second pre-coding matrix and the relay node of defeated information signal
Third pre-coding matrix.The method is applied to the wireless energy supply MIMO relay system based on TS agreement.Firstly, the method obtains
Take the second channel square between the first channel matrix, the relay node and the destination node between source node and relay node
Battle array, the relay node receive the energy conversion rate of the energy signal from the source node, the nominal function on the source node
The second peak power in the first peak power and the relay node in rate, the source node.Then, the method is distinguished
Singular value decomposition is carried out to first channel matrix and the second channel matrix, it is corresponding to obtain first channel matrix
First diagonal matrix and corresponding second diagonal matrix of the second channel matrix.Finally, the method is according to the nominal function
Rate, first peak power, second peak power, the energy conversion rate, first diagonal matrix and described
Two diagonal matrix are according to energy constraint condition and power constraints on the time-switching factor of the system, the source node
The the second precoding square for being used for transmission the first pre-coding matrix of energy signal, being used for transmission information signal on the source node
The third pre-coding matrix that the information signal from the source node is used for transmission in battle array and the relay node optimizes,
The time-switching factor and each pre-coding matrix to system described in the adjusting and optimizing by way of energy constraint and power constraint,
To improve the relay system to the efficiency of transmission and transmitted data amount of signal.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of transceiver combined optimization method, which is characterized in that more applied to the wireless energy supply based on time-switching TS agreement
Multi output MIMO relay system is inputted, the system comprises source node, relay node and destination nodes, wherein the relay node
Energy signal is sent by the source node and carries out wireless energy supply so that the information signal from the source node is transferred to the mesh
Node, which comprises
Obtain the first channel matrix, the relay node and the destination node between the source node and the relay node
Between second channel matrix, the relay node receive the energy conversion rate, described of the energy signal from the source node
The first peak power on nominal power, the source node on source node and the second peak power on the relay node；
Singular value decomposition is carried out to first channel matrix and the second channel matrix respectively, obtains the first channel square
Corresponding first diagonal matrix of battle array and corresponding second diagonal matrix of the second channel matrix；
According to the nominal power, first peak power, second peak power, the energy conversion rate, described
Pair of horns matrix and second diagonal matrix cut the time of the system according to energy constraint condition and power constraints
It changes the factor, the first pre-coding matrix that energy signal is used for transmission on the source node, be used for transmission information on the source node
The third that the information signal from the source node is used for transmission on the second pre-coding matrix and the relay node of signal is pre-
Encoder matrix optimizes.
2. the method according to claim 1, wherein described according to the nominal power, first peak work
Rate, second peak power, the energy conversion rate, first diagonal matrix and second diagonal matrix are according to energy
Constraint condition and power constraints are to being used for transmission energy signal on the time-switching factor of the system, the source node
It is used for transmission on the second pre-coding matrix and the relay node of information signal on first pre-coding matrix, the source node
It is used for transmission the step of the third pre-coding matrix of the information signal from the source node optimizes and includes:
According to first diagonal matrix, second diagonal matrix, the nominal power, first peak power, described
Second peak power and the energy conversion rate are acquired based on golden section search calculating meets the power constraints
The current optimal time-switching factor of the system, and accordingly obtain first precoding for meeting the power constraints
Optimal diagonal matrix corresponding to the corresponding optimal positive definite scalar of matrix, second pre-coding matrix and the third prelist
Optimal diagonal matrix corresponding to code matrix；
According to the current corresponding optimal positive definite scalar of first pre-coding matrix and first pre-coding matrix and described the
Current optimal first pre-coding matrix is calculated in incidence relation between one channel matrix；
According to the current corresponding optimal diagonal matrix of second pre-coding matrix and second pre-coding matrix and described the
Current optimal second pre-coding matrix is calculated in incidence relation between one channel matrix；
According to the current corresponding optimal diagonal matrix of the third pre-coding matrix and the third pre-coding matrix and described the
The current optimal third pre-coding matrix is calculated in incidence relation between two channel matrixes.
3. according to the method described in claim 2, it is characterized in that, the power constraints include and the first peak power pair
The the first peak value constraint condition answered, and the second peak value constraint condition corresponding with the second peak power, it is described accordingly to be met
The corresponding optimal positive definite scalar of first pre-coding matrix of the power constraints, second pre-coding matrix institute are right
The step of optimal diagonal matrix corresponding to the optimal diagonal matrix and the third pre-coding matrix answered includes:
Calculate the optimal time-switching factor during, based on the nominal power, first diagonal matrix
What diagonal element set, the diagonal element set of second diagonal matrix, the energy conversion rate and each iteration occurred cuts
The factor is changed, calculates the first peak value constraint condition of satisfaction corresponding with the switching factor that the iteration occurs most according to binary search
Excellent first foundation component, and meet the basic component of optimal second of the second peak value constraint condition；
The optimal first foundation component according to corresponding to the optimal time-switching factor being finally calculated and optimal
The second basic component and the first foundation component, the second basic component, first pre-coding matrix it is corresponding
To angular moment corresponding to diagonal matrix corresponding to positive definite scalar, second pre-coding matrix and the third pre-coding matrix
Incidence relation between battle array, is calculated the corresponding optimal positive definite scalar of first pre-coding matrix, second precoding
Optimal diagonal matrix corresponding to optimal diagonal matrix corresponding to matrix and the third pre-coding matrix.
4. according to the method described in claim 3, it is characterized in that, described calculate according to binary search occurs with the iteration
Switching factor it is corresponding meet the first peak value constraint condition optimal first foundation component, and meet the second peak value constrain item
The step of optimal second basic component of part includes:
It is right respectively according to binary search in the circulation that the switching factor occurred based on the iteration calculates optimal loose component
Equation complementary with the slackness of the calculated loose matched first foundation component of component and the second basic component
Slackness complementation equation is solved, and corresponding first foundation component and the second basic component are obtained；
Judge whether calculated first foundation component meets the first peak value constraint condition, judges calculated second basis
Whether component meets the second peak value constraint condition；
If the first foundation component meets the first peak value constraint condition, and the described second basic component meets the second peak value
Constraint condition, then using the calculated loose component, the first foundation component and the second basic component as
When the optimal loose component of secondary circulation, optimal first foundation component and the optimal second basic component.
5. according to the method described in claim 4, it is characterized in that, it is described according to binary search and water flood calculate with it is described
The corresponding optimal first foundation component for meeting the first peak value constraint condition of the switching factor that iteration occurs, and meet the second peak
The step of being worth the second optimal basis component of constraint condition further include:
If the first foundation component meets the first peak value constraint condition, and the described second basic component is unsatisfactory for the second peak
Be worth constraint condition, then using the calculated first foundation component as the optimal first foundation component for working as secondary circulation, according to
The corresponding secondary expression equation of the basic component of water flood solution second is obtained when the basic component of optimal second of secondary circulation, and base
It calculates and is acquired when time optimal loose component of circulation in the second optimal basic component.
6. according to the method described in claim 4, it is characterized in that, it is described according to binary search and water flood calculate with it is described
The corresponding optimal first foundation component for meeting the first peak value constraint condition of the switching factor that iteration occurs, and meet the second peak
The step of being worth the second optimal basis component of constraint condition further include:
If the first foundation component is unsatisfactory for the first peak value constraint condition, and the described second basic component meets the second peak
Be worth constraint condition, then using the calculated described second basic component as the basic component of optimal second for working as time circulation, according to
Water flood solves the corresponding secondary expression equation of first foundation component and obtains when time optimal first foundation component of circulation, and base
It calculates and is acquired when time optimal loose component of circulation in the optimal first foundation component.
7. according to the method described in claim 4, it is characterized in that, it is described according to binary search and water flood calculate with it is described
The corresponding optimal first foundation component for meeting the first peak value constraint condition of the switching factor that iteration occurs, and meet the second peak
The step of being worth the second optimal basis component of constraint condition further include:
If the first foundation component is unsatisfactory for the first peak value constraint condition, and the described second basic component is unsatisfactory for second
Peak value constraint condition then solves the corresponding secondary expression equation of first foundation component and the second basic component respectively according to water flood
Corresponding secondary expression equation is obtained when time optimal first foundation component of circulation and the optimal second basic component；
Be based respectively on the optimal first foundation component and the optimal second basic component calculate acquire two it is optimal
The basic corresponding loose component of component, and choose the lesser loose component conduct of numerical value in calculated two loose components
When the optimal loose component of secondary circulation.
8. method according to any one of claims 1-7, which is characterized in that the method also includes:
The signal transmission cycle that the system is configured using the time-switching factor after optimization, using the first precoding after optimization
Matrix and the second pre-coding matrix configure the source node, and configure the relaying section using the third pre-coding matrix after optimization
Point, so that the system is communicated based on the pre-coding matrix after optimization and the time-switching factor after optimization.
9. a kind of transceiver combined optimization device, which is characterized in that more applied to the wireless energy supply based on time-switching TS agreement
Multi output MIMO relay system is inputted, the system comprises source node, relay node and destination nodes, wherein the relay node
Energy signal is sent by the source node and carries out wireless energy supply so that the information signal from the source node is transferred to the mesh
Node, described device includes:
Data obtaining module, for obtaining the first channel matrix between the source node and the relay node, the relaying
Second channel matrix, the relay node between node and the destination node receive the energy signal from the source node
Energy conversion rate, the nominal power on the source node, the first peak power on the source node and the relay node
On the second peak power；
Matrix decomposition module, for carrying out singular value decomposition to first channel matrix and the second channel matrix respectively,
Obtain corresponding first diagonal matrix of first channel matrix and corresponding second diagonal matrix of the second channel matrix；
Combined optimization module, for according to the nominal power, first peak power, second peak power, described
Energy conversion rate, first diagonal matrix and second diagonal matrix are according to energy constraint condition and power constraints pair
The first pre-coding matrix, the source section of energy signal are used for transmission in the time-switching factor of the system, the source node
It is used for transmission on the second pre-coding matrix and the relay node of information signal and is used for transmission from the source node on point
The third pre-coding matrix of information signal optimizes.
10. device according to claim 9, which is characterized in that described device further include:
Configuration module, for configuring the signal transmission cycle of the system using the time-switching factor after optimization, using optimization
The first pre-coding matrix and the second pre-coding matrix afterwards configures the source node, and using the third pre-coding matrix after optimization
The relay node is configured, so that the time-switching factor of the system based on the pre-coding matrix after optimization and after optimization carries out
Communication.
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