CN106301521A - The transmission method of a kind of energy and information in wireless energy supply communication network and device - Google Patents

Abstract

Embodiments provide transmission method and the device of a kind of energy and information in wireless energy supply communication network, use full-duplex communication mode, by source node and via node are designed the wave beam forming factor, with the self-interference produced during reducing full-duplex communication, improve the handling capacity of network；On the one hand source node obtains energy from the signal that via node sends, and on the other hand obtains energy from the signal that itself sends, can improve the efficiency of source node self.

Description

The transmission method of a kind of energy and information in wireless energy supply communication network and device

Technical field

The present invention relates to wireless communication technology field, particularly relate to a kind of energy and letter in wireless energy supply communication network The transmission method of breath and device.

Background technology

Energy and environment problem is the challenge of Present Global facing.The carbon emission of ICT industry and energy consumption Shared ratio increases rapidly, and wireless communication industry occupies an important position in terms of energy-saving and emission-reduction.Therefore, low-carbon (LC), health, height The green communications system of effect causes the concern of people day by day, has a good application prospect.As the tradition energy such as wind energy, solar energy The replacement in source, radio frequency is considered a kind of new feasible energy source.The radio-frequency (RF) energy that radio-frequency (RF) energy is converted into electric energy is collected Technology, be a kind of have provide forever, easily energy supply potentiality technology, be considered solve energy constraint wireless network The key technology of shortage of energy problem, meet the standard of green communications.Therefore, wireless energy supply communication network, i.e. base station utilize Downlink transmission energy and decode user by uplink transmission information, has attracted the interest of more and more people.

Along with the development of technology, relaying technique, full duplex technology improve radio frequency with the combination of radio-frequency (RF) energy collection technique The performance of energy collection technology and range of application.Relaying technique solves radio energy-transmitting technology (wireless power Transfer) applications distances problem so that radio energy-transmitting technology has and realizes meaning.By using via node, in cooperation The technology of continuing can help to overcome channel fading, improves usefulness and the reliability of network.Generally junction network uses half pair Work pattern.Half-duplex relaying working method itself result in the massive losses of spectrum efficiency, and solves a tool of this problem The scheme having the biggest prospect uses full duplex to relay exactly, and via node can use similar frequency bands receive simultaneously and send letter Number.But, owing to the intensity in loop interference (loopback interference) is high, sends while information and receive reality Now get up relatively difficult.

The information of existing WPCN (wireless charging energy communication network) and energy transmission method are a kind of two-part host-host protocol, should Pattern is semiduplex mode, a transmission time slot of base station will be divided into two sub-slots, in first sub-slots, base station (via node) utilizes downlink that user's (source node) is carried out wireless charging energy；And in second time slot, base station as in The node that continues assists source node to transmit information to destination node.Nodes all configures single antenna, and source node takes first to collect energy Amount transmits the mode of operation of information again.

But first above-mentioned transmission method there is problems in that, prior art uses half-duplex transmission pattern, causes network Entire throughput is the highest；Secondly, the host-host protocol of prior art is only applicable to half-duplex transmission pattern, is not suitable for full duplex and passes Defeated pattern.

Summary of the invention

The purpose of the embodiment of the present invention is to provide a kind of energy and transmission side of information in wireless energy supply communication network Method and device, to improve handling capacity and the efficiency of network.

Concrete technical scheme is as follows:

The first scheme: a kind of energy and transmission method of information in wireless energy supply communication network, is applied to wireless confession In energy communication network, the source node of full duplex, also includes via node and the purpose of full duplex in described wireless energy supply communication network Node, described method includes:

Obtain signal to be sent, use the first wave beam forming vector preset that signal to be sent is carried out wave beam forming and obtain First signal；

First signal is sent to via node by the first transmission antenna being only used for sending signal preset, so that in The node that continues receives described first signal by the second reception antenna being only used for receiving signal preset；

Receive the first signal by default the first reception antenna being only used for receiving signal, from the first signal, obtain energy Amount information；

Receive, by described first reception antenna, the secondary signal sent by via node, from secondary signal, obtain energy Information；Described secondary signal is: described via node uses the second wave beam forming vector preset to enter described first signal Row wave beam forming obtains, and is saved to destination node and source by the second transmission antenna transmission being only used for sending signal preset The signal of point.

First scheme: a kind of energy and transmission method of information in wireless energy supply communication network, is applied to wireless confession In energy communication network, the via node of full duplex, also includes source node and the purpose of full duplex in described wireless energy supply communication network Node, described method includes:

The first signal that source node sends is received by default the second reception antenna being only used for receiving signal；Described One signal is that source node uses that the first wave beam forming vector preset carries out wave beam forming acquisition to signal to be sent and passes through The signal that the first transmission antenna being only used for sending signal preset sends；

Use the second wave beam forming vector preset that the first signal is carried out wave beam forming and obtain secondary signal；

By default the second transmission antenna sending signal that is only used for, described secondary signal is sent to source node and mesh Mark node, so that source node is by the first reception antenna described secondary signal of reception being only used for receiving signal preset, and from Described secondary signal obtains energy.

Preferably,

The first described wave beam forming vector is:

$w_s^{opt}=\sqrt{{\mathrm{\ηP}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

Wherein, η represents the energy conversion efficiency of energy collection circuit, P_mRepresent the transmit power of via node,h_rsRepresent the via node channel to source node, N_rRepresent one and meet h_rrN_r=0 HeMatrix, h_rrRepresent via node remaining interference channel after time domain self-interference eliminates,Respectively Represent h_sr, h_ssConjugate transpose, h_srRepresent the source node channel to via node, h_ssRepresent the annular track of source node self；

The second described wave beam forming vector is:

$w_r^{opt}=a_r^{opt}{N}_r{v}_r^{opt},$

Wherein, a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one and meet h_rrN_r=0 HeMatrix.

Preferably,

The first described wave beam forming vector calculates acquisition as follows:

The signal that via node receives is expressed as: y_r(n)=h_srw_sx_s(n)+h_rrx_r(n)+n_r(n),

Wherein n represents the n-th communication block, h_srRepresent the source node channel to via node, w_sRepresent the first of source node Wave beam forming vector, x_sN () represents the data that source node sends, h_rrRepresent that via node is surplus after time domain self-interference eliminates Remaining interference channel, x_rN () represents the data that via node sends, n_rN () represents the noise signal that via node receives；

The signal that via node sends is expressed as:

x_r(n)=w_ry_r(n-ω)=w_rh_srw_sx_s(n-ω)+w_rh_rrx_r(n-ω)+w_rn_r(n-ω),

Wherein, w_rRepresenting the second wave beam forming vector of via node, ω represents that relaying is the time of node processing information, y_r(n-ω) represents the signal received at this moment via node of n-ω, h_srRepresent the source node channel to via node, w_sRepresenting the first wave beam forming vector of source node, ω represents via node processing delay, x_s(n-ω) represent n-ω this time Carve the information that source node sends, x_r(n-ω) represents in the data that this moment via node of n-ω sends, n_r(n-ω) represents n- ω this time be engraved in the additive noise of via node；

Substitute into h_rrw_rr=0, the signal that via node sends is expressed as:

x_r(n)=w_rh_srw_sx_s(n-ω)+w_rn_r(n-ω)；

The signal that destination node receives is expressed as:

$y_d\left(n\right)=h_{rd}{x}_r\left(n\right)+n_d\left(n\right)=h_{rd}{w}_r{h}_{sr}{w}_s{x}_s(n-\mathrm{\ω})+{\tilde{n}}_d\left(n\right),$

Wherein,Represent the noise of destination node；

The signal that source node receives is expressed as:

y_s(n)=h_ssw_sx_s(n)+h_rsx_r(n)+n_s(n)

=h_ssw_sx_s(n)+h_rsw_rh_srw_sx_s(n-ω)+h_rsw_rn_r(n-ω)+n_s(n),

Wherein, x_sN () represents the data that source node sends, x_s(n-ω) represents in the transmission of this moment source node of n-ω Information, n_r(n-ω) represent n-ω this time be engraved in the additive noise of via node, n_sN () represents the noise that source node receives Signal；

The gross energy that in each communication block, source node obtains is expressed as:

$E_S=\mathrm{\η}T\left(\right|h_{ss}{w}_s{|}^2+|h_{rs}{w}_r{h}_{sr}{w}_s{|}^2+{\mathrm{\δ}}_r^2|h_{rs}{w}_r{|}^2),$

Wherein, 0 < η≤1 represents the efficiency of energy collection of source node, and T represents the persistent period of each communication block,Represent The variance of the additive noise at via node reception antenna；

Network throughput is expressed as: R=log₂(1+SNR), wherein, SNR represents signal to noise ratio end to end；

Network throughput to be made is maximum, and system signal to noise ratio end to end maximizes formula and is expressed as:

$\begin{array}{cc}\underset{w_s,w_r}{\max }& SNR=\frac{\left|h_{rd}{w}_r{|}^2\right|h_{sr}{w}_s{|}^2}{{\mathrm{\&delta;}}_r^2|h_{rd}{w}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& h_{rr}{w}_r=0\\ & 0\&le;P_s=\left|\right|w_s|{|}^2\&le;E_s/T\\ & |w_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|\left|w_r\right|{|}^2\&le;P_m\end{array},---\left(1\right)$

Wherein, h_rdRepresent the via node channel to destination node, w_rRepresent the second wave beam forming vector of via node, h_srRepresent the source node channel to via node, w_sRepresent the first wave beam forming vector of source node,Represent that destination node connects The variance of the additive noise at receipts antenna,The variance of the additive noise at expression via node reception antenna；h_rrRepresent relaying Node is remaining interference channel, P after time domain self-interference eliminates_SRepresent the transmit power of source node, E_sRepresent each communication The gross energy that in block, source node receives, E_sExpression formula be:Its In 0 < η≤1 represent source node efficiency of energy collection, T represents the persistent period of each communication block, P_mRepresent sending out of via node Send power；

By w_rIt is decomposed into w_r=a_rN_rv_r, wherein a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one Individual meet h_rrN_r=0 HeMatrix, thus, described maximization formula (1) is transformed into:

$\begin{array}{cc}\underset{w_s,w_r}{\max }& SNR=\frac{a_r^2\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{a_r^2{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & a_r^2\&le;\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\\ & a_r^2\&GreaterEqual;\frac{\left|\right|w_s|{|}^2-\mathrm{\&eta;}|h_{ss}{w}_s{|}^2}{\mathrm{\&eta;}|h_{rs}{N}_r{v}_r{|}^2\left(\right|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2)}\end{array},---\left(2\right)$

In the case of ensureing feasibility, a_rOptimal solution be:

$a_r^{opt}=\sqrt{\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}},$

By a_rOptimal solution substitute into maximize formula (2), obtain maximize formula (3):

$\begin{array}{cc}\underset{w_s,v_r}{\max }& S(w_s,v_r)=\frac{P_m\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{P_m{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(\right|h_{ss}{w}_s{|}^2+P_m\left|h_{rs}{N}_r{v}_r{|}^2\right)\end{array},---\left(3\right)$

v_rThe parameter being expressed as:

$v_r=x\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^2}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

Wherein 0≤x≤1,RepresentConjugate transpose,RepresentBe total to Yoke transposition, η represents the energy conversion efficiency of energy collection circuit, ∏_XRepresent the column space rectangular projection to X,Represent to X The orthocomplement, orthogonal complement projection of column space, therefore, maximizes formula (3) and is equivalent to:

$\begin{array}{cc}\underset{0\&le;x\&le;1}{\max }& f\left(x\right)\end{array},$

Wherein f (x) is defined as:

$f\left(x\right)=\underset{w_s}{\max }S(w_s,v_r(x\left)\right)$

$\begin{array}{cc}s.t.& \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(\right|h_{ss}{w}_s{|}^2+P_m\left|{\tilde{h}}_{rs}{v}_r\right(x\left){|}^2\right),\end{array}$

Thus, w is drawn_sGlobal optimum be:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

WhereinAndRepresent h respectively_sr, h_ssConjugate transpose；

Described second wave beam forming vector calculates acquisition as follows:

WillExpression formula substitute into and maximize formula (3), obtain the Explicit functions of function f (x):

$f\left(x\right)=\frac{P_m{a}^2{b}^2{(cx+d\sqrt{1-x^2})}^2}{P_m{b}^2+a^2(c+d\sqrt{\frac{1}{x^2}-1})+\frac{{\mathrm{\&delta;}}_r^2{\mathrm{\&delta;}}_d^2}{x^2}},$

Wherein, F (x) is a unimodal function, obtains the optimal solution of x, therefore v with two way classification_rOptimal solution be:

$v_r^{opt}=x^{opt}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^{opt2}}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

A described in conjunction with_rOptimal solution, obtain w_rGlobal optimum be

The third scheme: a kind of energy and transmitting device of information in wireless energy supply communication network, is applied to wireless confession In energy communication network, the source node of full duplex, also includes via node and the purpose of full duplex in described wireless energy supply communication network Node, described device includes:

First wave beam forming unit, is used for obtaining signal to be sent, uses the first wave beam forming vector preset to pending The number of delivering letters carries out wave beam forming and obtains the first signal；

First transmitting element, for sending the first signal by the first transmission antenna being only used for sending signal preset To via node, so that via node receives described first letter by the second reception antenna being only used for receiving signal preset Number；

First receives unit, for receiving the first signal by default the first reception antenna being only used for receiving signal, Energy information is obtained from the first signal；

Second receives unit, for receiving, by described first reception antenna, the secondary signal sent by via node, from Secondary signal obtains energy information；Described secondary signal is: described via node use preset the second wave beam forming to Amount carries out wave beam forming acquisition to described first signal, and is sent out by the second transmission antenna being only used for sending signal preset Deliver to the signal of destination node and source node.

4th kind of scheme: a kind of energy and transmitting device of information in wireless energy supply communication network, is applied to wireless confession In energy communication network, the via node of full duplex, also includes source node and the purpose of full duplex in described wireless energy supply communication network Node, described device includes:

3rd receives unit, for receiving source node transmission by default the second reception antenna being only used for receiving signal The first signal；Described first signal is that source node uses the first wave beam forming vector preset that signal to be sent is carried out wave beam Signal that is that figuration obtains and that sent by the first transmission antenna being only used for sending signal preset；

Second wave beam forming unit, for using the second default wave beam forming vector that the first signal is carried out wave beam forming Obtain secondary signal；

Second transmitting element, is used for described secondary signal by default the second transmission antenna being only used for transmission signal Send to source node and destination node, so that source node receives institute by the first reception antenna being only used for receiving signal preset State secondary signal, and obtain energy from described secondary signal.

The energy in wireless energy supply communication network of embodiment of the present invention offer and the transmission method of information and device, use Full-duplex communication mode, by designing the wave beam forming factor, during reducing full-duplex communication to source node and via node The self-interference produced, improves the handling capacity of network；On the one hand source node obtains energy from the signal that via node sends, another Aspect obtains energy from the signal that itself sends, and can improve the efficiency of source node self.Certainly, appointing of the present invention is implemented One product or method must be not necessarily required to reach all the above advantage simultaneously.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to Other accompanying drawing is obtained according to these accompanying drawings.

Fig. 1 is the application scenarios figure of the inventive method；

Fig. 2 is the flow chart of the inventive method embodiment one；

Fig. 3 is that the via node self-interference used in the inventive method eliminates circuit block diagram；

Fig. 4 is the source node energy collection circuit block diagram used in the inventive method；

Fig. 5 is the flow chart of the inventive method embodiment four；

Fig. 6 is the graph of relation of repeat transmitted power and throughput of system；

Fig. 7 is the structure chart of apparatus of the present invention embodiment one；

Fig. 8 is the structure chart of apparatus of the present invention embodiment two.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of protection of the invention.

The embodiment of the present invention is under the scene of WPCN based on relaying, full duplex technology is tied mutually with multi-antenna technology Close, it is proposed that the one-part form transmission plan of a kind of novelty, by default wave beam forming vector, signal is carried out wave beam forming laggard Row transmission, solves the self-interference problem that full duplex technology is brought, and the throughput performance of system is greatly improved accordingly.

Here, it should be noted that first by the source node in network, via node and destination node in present example All it is configured to full-duplex mode.Wherein, source node configures a sky being only used for receiving signal (being namely used for collecting energy) Line, and at least two antennas being only used for sending signal；Via node also configures a sky being only used for receiving signal simultaneously Line, and at least two antennas being used for sending signal.

Embodiment of the method one

The present invention is a kind of embodiment of the transmission method of energy and information in wireless energy supply communication network, as it is shown in figure 1, It is applied to the source node S of full duplex in wireless energy supply communication network, described wireless energy supply communication network also includes full duplex Via node R and destination node D；

Method is as in figure 2 it is shown, include:

S201: obtain signal to be sent, uses the first wave beam forming vector preset that signal to be sent is carried out wave beam tax Shape obtains the first signal；

Concrete, the first described wave beam forming vector is:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_v\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

Wherein, η represents the energy conversion efficiency of energy collection circuit, P_mRepresent the transmit power of via node,h_rsRepresent the via node channel to source node, N_rRepresent one and meet h_rrN_r=0 HeMatrix, h_rrRepresent via node remaining interference channel after time domain self-interference eliminates,Respectively Represent h_sr, h_ssConjugate transpose, h_srRepresent the source node channel to via node, h_ssRepresent the annular track of source node self；

Preferably, the first described wave beam forming vector calculates acquisition as follows:

The signal that via node receives is expressed as: y_r(n)=h_srw_sx_s(n)+h_rrx_r(n)+n_r(n),

Wherein n represents the n-th communication block, h_srRepresent the source node channel to via node, w_sRepresent the first of source node Wave beam forming vector, x_sN () represents the data that source node sends, h_rrRepresent that via node is surplus after time domain self-interference eliminates Remaining interference channel, x_rN () represents the data that via node sends, n_rN () represents the noise signal that via node receives；

The signal that via node sends is expressed as:

x_r(n)=w_ry_r(n-ω)=w_rh_srw_sx_s(n-ω)+w_rh_rrx_r(n-ω)+w_rn_r(n-ω),

Wherein, w_rRepresenting the second wave beam forming vector of via node, ω represents that relaying is the time of node processing information, y_r(n-ω) represents the signal received at this moment via node of n-ω, h_srRepresent the source node channel to via node, w_sRepresenting the first wave beam forming vector of source node, ω represents via node processing delay, x_s(n-ω) represent n-ω this time Carve the information that source node sends, x_r(n-ω) represents in the data that this moment via node of n-ω sends, n_r(n-ω) represents n- ω this time be engraved in the additive noise of via node；

Substitute into h_rrw_rr=0, the signal that via node sends is expressed as:

x_r(n)=w_rh_srw_sx_s(n-ω)+w_rn_r(n-ω)；

The signal that destination node receives is expressed as:

$y_d\left(n\right)=h_{rd}{x}_r\left(n\right)+n_d\left(n\right)=h_{rd}{w}_r{h}_{sr}{w}_s{x}_s(n-\mathrm{\&omega;})+{\tilde{n}}_d\left(n\right),$

Wherein,Represent the noise of destination node；

The signal that source node receives is expressed as:

y_s(n)=h_ssw_sx_s(n)+h_rsx_r(n)+n_s(n)

=h_ssw_sx_s(n)+h_rsw_rh_srw_sx_s(n-ω)+h_rsw_rn_r(n-ω)+n_s(n),

Wherein, x_sN () represents the data that source node sends, x_s(n-ω) represents in the transmission of this moment source node of n-ω Information, n_r(n-ω) represent n-ω this time be engraved in the additive noise of via node, n_sN () represents the noise that source node receives Signal；

The gross energy that in each communication block, source node obtains is expressed as:

$E_S=\mathrm{\&eta;}T\left(\right|h_{ss}{w}_s{|}^2+|h_{rs}{w}_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|h_{rs}{w}_r{|}^2),$

Wherein, 0 < η≤1 represents the efficiency of energy collection of source node, and T represents the persistent period of each communication block,Represent The variance of the additive noise at via node reception antenna；

Network throughput is expressed as: R=log₂(1+SNR), wherein, SNR represents signal to noise ratio end to end；

Network throughput to be made is maximum, and system signal to noise ratio end to end maximizes formula and is expressed as:

$\begin{array}{cc}\underset{w_s,w_r}{\max }& SNR=\frac{\left|h_{rd}{w}_r{|}^2\right|h_{sr}{w}_s{|}^2}{{\mathrm{\&delta;}}_r^2|h_{rd}{w}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& h_{rr}{w}_r=0\\ & 0\&le;P_s=\left|\right|w_s|{|}^2\&le;E_s/T\\ & |w_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|\left|w_r\right|{|}^2\&le;P_m\end{array},---\left(1\right)$

Wherein, h_rdRepresent the via node channel to destination node, w_rRepresent the second wave beam forming vector of via node, h_srRepresent the source node channel to via node, w_sRepresent the first wave beam forming vector of source node,Represent that destination node connects The variance of the additive noise at receipts antenna,The variance of the additive noise at expression via node reception antenna；h_rrRepresent relaying Node is remaining interference channel, P after time domain self-interference eliminates_SRepresent the transmit power of source node, E_sRepresent each communication The gross energy that in block, source node receives, E_sExpression formula be:Its In 0 < η≤1 represent source node efficiency of energy collection, T represents the persistent period of each communication block, P_mRepresent sending out of via node Send power；

By w_rIt is decomposed into w_r=a_rN_rv_r, wherein a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one Individual meet h_rrN_r=0 HeMatrix, thus, described maximization formula (1) is transformed into:

$\begin{array}{cc}\underset{w_s,w_r}{\max }& SNR=\frac{a_r^2\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{a_r^2{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & a_r^2\&le;\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\\ & a_r^2\&GreaterEqual;\frac{\left|\right|w_s|{|}^2-\mathrm{\&eta;}|h_{ss}{w}_s{|}^2}{\mathrm{\&eta;}|h_{rs}{N}_r{v}_r{|}^2\left(\right|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2)}\end{array},---\left(2\right)$

In the case of ensureing feasibility, a_rOptimal solution be:

$a_r^{opt}=\sqrt{\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}},$

By a_rOptimal solution substitute into maximize formula (2), obtain maximize formula (3):

$\begin{array}{cc}\underset{w_s,v_r}{\max }& S(w_s,v_r)=\frac{P_m\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{P_m{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(\right|h_{ss}{w}_s{|}^2+P_m\left|h_{rs}{N}_r{v}_r{|}^2\right)\end{array},---\left(3\right)$

v_rThe parameter being expressed as:

$v_r=x\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^2}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

Wherein 0≤x≤1,RepresentConjugate transpose,RepresentBe total to Yoke transposition, η represents the energy conversion efficiency of energy collection circuit, ∏_XRepresent the column space rectangular projection to X,Represent to X The orthocomplement, orthogonal complement projection of column space, therefore, maximizes formula (3) and is equivalent to:

$\begin{array}{cc}\underset{0\&le;x\&le;1}{\max }& f\left(x\right)\end{array},$

Wherein f (x) is defined as:

$f\left(x\right)=\underset{w_s}{\max }S(w_s,v_r(x\left)\right)$

$\begin{array}{cc}s.t.& \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(\right|h_{ss}{w}_s{|}^2+P_m\left|{\tilde{h}}_{rs}{v}_r\right(x\left){|}^2\right),\end{array}$

Thus, w is drawn_sGlobal optimum be:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

WhereinAndRepresent h respectively_sr, h_ssConjugate transpose；

Should be noted that via node eliminates through time domain self-interference, use self-interference commonly used in the prior art to disappear Except circuit realiration.Such as, as it is shown on figure 3, the simulation self-interference signal launching antenna generation is the most defeated with numeral self-interference signal Enter to simulation interference cancellation circuit and numeral interference cancellation circuit, carry out time domain interference and eliminate.

Should be noted that the calculating process of the first wave beam forming vector is carried out in via node.

S202: the first signal is sent to via node by the first transmission antenna being only used for sending signal preset, So that via node receives described first signal by the second reception antenna being only used for receiving signal preset；

Preferably, the first transmission antenna sets at least to two；

Preferably, the second reception antenna is set to one；

S203: receive the first signal, from the first signal by default the first reception antenna being only used for receiving signal Obtain energy information；

Preferably, the first reception antenna is set to one；

Should be noted that and obtain energy information from the first signal, use collection of energy commonly used in the prior art electricity Road realizes.Such as, as shown in Figure 4, after reception antenna receives the signal of band energy, by impedance matching, rectification circuit and storage Energy can be obtained by circuit.

S204: receive, by described first reception antenna, the secondary signal sent by via node, obtain from secondary signal Obtain energy information；Described secondary signal is: described via node uses the second wave beam forming vector preset to described first Signal carries out wave beam forming acquisition, and is sent to destination node by the second transmission antenna being only used for sending signal preset Signal with source node.

Concrete, the second described wave beam forming vector is:

Wherein, a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one and meet h_rrN_r=0 HeMatrix；

Preferably, described second wave beam forming vector calculates acquisition as follows:

WillExpression formula substitute into and maximize formula (3), obtain the Explicit functions of function f (x):

$f\left(x\right)=\frac{P_m{a}^2{b}^2{(cx+d\sqrt{1-x^2})}^2}{P_m{b}^2+a^2(c+d\sqrt{\frac{1}{x^2}-1})+\frac{{\mathrm{\&delta;}}_r^2{\mathrm{\&delta;}}_d^2}{x^2}},$

Wherein, F (x) is a unimodal function, obtains the optimal solution of x, therefore v with two way classification_rOptimal solution be:

$v_r^{opt}=x^{opt}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^{opt2}}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

A described in conjunction with_rOptimal solution, obtain w_rGlobal optimum be

Preferably, the first reception antenna is set to one；

Preferably, the second transmission antenna sets at least to two；

Should be noted that the calculating process of the second wave beam forming vector is carried out in via node；

Should be noted that from secondary signal, obtain energy information, use collection of energy commonly used in the prior art electricity Road realizes, and as shown in Figure 4, is not repeated herein.

To sum up, in embodiments of the present invention, source node can send while signal, collect come from the first signal and The energy of secondary signal, so can effectively promote the performance of whole system.

Embodiment of the method two

The present embodiment, will on the basis of above-described embodiment oneIt is reduced to:

To sum up, in embodiments of the present invention, maximize the energy that source node obtains from the secondary signal received, reduce The complexity that wave beam forming factor optimal value calculates.

Embodiment of the method three

The present embodiment, will on the basis of above-described embodiment oneIt is reduced to:

To sum up, in embodiments of the present invention, maximize the signal that via node transmits to destination node, reduce wave beam and compose The complexity that shape factor optimal value calculates.

Embodiment of the method four

The present invention is the 4th kind of embodiment of the transmission method of energy and information in wireless energy supply communication network, such as Fig. 1 institute Show, be applied to the via node R of full duplex in wireless energy supply communication network, described wireless energy supply communication network also includes complete double The source node S of work and destination node D；

Method is as it is shown in figure 5, include:

S501: receive the first signal that source node sends by default the second reception antenna being only used for receiving signal； Described first signal be source node use the first wave beam forming vector preset signal to be sent carried out wave beam forming acquisition, And the signal of the first transmission antenna transmission being only used for sending signal by presetting；

Preferably, the second reception antenna is set to one；

Preferably, the first transmission antenna sets at least to two；

Concrete, the first described wave beam forming vector is:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

Wherein, η represents the energy conversion efficiency of energy collection circuit, P_mRepresent the transmit power of via node,h_rsRepresent the via node channel to source node, N_rRepresent one and meet h_rrN_r=0 HeMatrix, h_rrRepresent via node remaining interference channel after time domain self-interference eliminates,Respectively Represent h_sr, h_ssConjugate transpose, h_srRepresent the source node channel to via node, h_ssRepresent the annular track of source node self；

Preferably, the first described wave beam forming vector calculates acquisition as follows:

The signal that via node receives is expressed as: y_r(n)=h_srw_sx_s(n)+h_rrx_r(n)+n_r(n),

Wherein n represents the n-th communication block, h_srRepresent the source node channel to via node, w_sRepresent the first of source node Wave beam forming vector, x_sN () represents the data that source node sends, h_rrRepresent that via node is surplus after time domain self-interference eliminates Remaining interference channel, x_rN () represents the data that via node sends, n_rN () represents the noise signal that via node receives；

The signal that via node sends is expressed as:

x_r(n)=w_ry_r(n-ω)=w_rh_srw_sx_s(n-ω)+w_rh_rrx_r(n-ω)+w_rn_r(n-ω),

Wherein, w_rRepresenting the second wave beam forming vector of via node, ω represents that relaying is the time of node processing information, y_r(n-ω) represents the signal received at this moment via node of n-ω, h_srRepresent the source node channel to via node, w_sRepresenting the first wave beam forming vector of source node, ω represents via node processing delay, x_s(n-ω) represent n-ω this time Carve the information that source node sends, x_r(n-ω) represents in the data that this moment via node of n-ω sends, n_r(n-ω) represents n- ω this time be engraved in the additive noise of via node；

Substitute into h_rrw_rr=0, the signal that via node sends is expressed as:

x_r(n)=w_rh_srw_sx_s(n-ω)+w_rn_r(n-ω)；

The signal that destination node receives is expressed as:

$y_d\left(n\right)=h_{rd}{x}_r\left(n\right)+n_d\left(n\right)=h_{rd}{w}_r{h}_{sr}{w}_s{x}_s(n-\mathrm{\&omega;})+{\tilde{n}}_d\left(n\right),$

Wherein,Represent the noise of destination node；

The signal that source node receives is expressed as:

y_s(n)=h_ssw_sx_s(n)+h_rsx_r(n)+n_s(n)

=h_ssw_sx_s(n)+h_rsw_rh_srw_sx_s(n-ω)+h_rsw_rn_r(n-ω)+n_s(n),

Wherein, x_sN () represents the data that source node sends, x_s(n-ω) represents in the transmission of this moment source node of n-ω Information, n_r(n-ω) represent n-ω this time be engraved in the additive noise of via node, n_sN () represents the noise that source node receives Signal；

The gross energy that in each communication block, source node obtains is expressed as:

$E_S=\mathrm{\&eta;}T\left(\right|h_{ss}{w}_s{|}^2+|h_{rs}{w}_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|h_{rs}{w}_r{|}^2),$

Wherein, 0 < η≤1 represents the efficiency of energy collection of source node, and T represents the persistent period of each communication block,Represent The variance of the additive noise at via node reception antenna；

Network throughput is expressed as: R=log₂(1+SNR), wherein, SNR represents signal to noise ratio end to end；

Network throughput to be made is maximum, and system signal to noise ratio end to end maximizes formula and is expressed as:

$\begin{array}{cc}\underset{w_s,w_r}{\max }& SNR=\frac{\left|h_{rd}{w}_r{|}^2\right|h_{sr}{w}_s{|}^2}{{\mathrm{\&delta;}}_r^2|h_{rd}{w}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& h_{rr}{w}_r=0\\ & 0\&le;P_s=\left|\right|w_s|{|}^2\&le;E_s/T\\ & |w_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|\left|w_r\right|{|}^2\&le;P_m\end{array},---\left(1\right)$

Wherein, h_rdRepresent the via node channel to destination node, w_rRepresent the second wave beam forming vector of via node, h_srRepresent the source node channel to via node, w_sRepresent the first wave beam forming vector of source node,Represent that destination node connects The variance of the additive noise at receipts antenna,The variance of the additive noise at expression via node reception antenna；h_rrRepresent relaying Node is remaining interference channel, P after time domain self-interference eliminates_SRepresent the transmit power of source node, E_sRepresent each communication The gross energy that in block, source node receives, E_sExpression formula be:Its In 0 < η≤1 represent source node efficiency of energy collection, T represents the persistent period of each communication block, P_mRepresent sending out of via node Send power；

By w_rIt is decomposed into w_r=a_rN_rv_r, wherein a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one Individual meet h_rrN_r=0 HeMatrix, thus, described maximization formula (1) is transformed into:

$\begin{array}{cc}\underset{w_s,w_r}{\max }& SNR=\frac{a_r^2\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{a_r^2{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & a_r^2\&le;\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\\ & a_r^2\&GreaterEqual;\frac{\left|\right|w_s|{|}^2-\mathrm{\&eta;}|h_{ss}{w}_s{|}^2}{\mathrm{\&eta;}|h_{rs}{N}_r{v}_r{|}^2\left(\right|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2)}\end{array},---\left(2\right)$

In the case of ensureing feasibility, a_rOptimal solution be:

$a_r^{opt}=\sqrt{\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}},$

By a_rOptimal solution substitute into maximize formula (2), obtain maximize formula (3):

$\begin{array}{cc}\underset{w_s,v_r}{\max }& S(w_s,v_r)=\frac{P_m\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{P_m{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(\right|h_{ss}{w}_s{|}^2+P_m\left|h_{rs}{N}_r{v}_r{|}^2\right)\end{array},---\left(3\right)$

v_rThe parameter being expressed as:

$v_r=x\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^2}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

Wherein 0≤x≤1,RepresentConjugate transpose,RepresentBe total to Yoke transposition, η represents the energy conversion efficiency of energy collection circuit, ∏_XRepresent the column space rectangular projection to X,Represent to X The orthocomplement, orthogonal complement projection of column space, therefore, maximizes formula (3) and is equivalent to:

$\begin{array}{cc}\underset{0\&le;x\&le;1}{\max }& f\left(x\right)\end{array},$

Wherein f (x) is defined as:

$f\left(x\right)=\underset{w_s}{\max }S(w_s,v_r(x\left)\right)$

$\begin{array}{cc}s.t.& \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(\right|h_{ss}{w}_s{|}^2+P_m\left|{\tilde{h}}_{rs}{v}_r\right(x\left){|}^2\right),\end{array}$

Thus, w is drawn_sGlobal optimum be:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

WhereinAndRepresent h respectively_sr, h_ssConjugate transpose；

Should be noted that via node eliminates through time domain self-interference, use in prior art normal as source node Self-interference eliminate circuit realiration, as it is shown on figure 3, be not repeated herein.

Should be noted that the calculating process of the first wave beam forming vector is carried out in via node.

S502: use the second wave beam forming vector preset that the first signal is carried out wave beam forming and obtain secondary signal；

Concrete, the second described wave beam forming vector is:

Wherein, a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one and meet h_rrN_r=0 HeMatrix；

Preferably, described second wave beam forming vector calculates acquisition as follows:

WillExpression formula substitute into and maximize formula (3), obtain the Explicit functions of function f (x):

$f\left(x\right)=\frac{P_m{a}^2{b}^2{(cx+d\sqrt{1-x^2})}^2}{P_m{b}^2+a^2(c+d\sqrt{\frac{1}{x^2}-1})+\frac{{\mathrm{\&delta;}}_r^2{\mathrm{\&delta;}}_d^2}{x^2}},$

Wherein,

F (x) is a unimodal function, obtains the optimal solution of x, therefore v with two way classification_rOptimal solution be:

$v_r^{opt}=x^{opt}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^{opt2}}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

A described in conjunction with_rOptimal solution, obtain w_rGlobal optimum be

Should be noted that the calculating process of the second wave beam forming vector is carried out in via node.

S503: described secondary signal is sent to source node by default the second transmission antenna sending signal that is only used for And destination node, so that source node receives described secondary signal by the first reception antenna being only used for receiving signal preset, And obtain energy from described secondary signal；

Preferably, the second transmission antenna sets at least to two；

Preferably, the first reception antenna is set to one；

Should be noted that source node obtains energy information from secondary signal, use energy commonly used in the prior art Collecting circuit realizes, and as shown in Figure 4, is not repeated herein.

To sum up, in embodiments of the present invention, via node can send simultaneously and receive signal, it is possible to effectively promote system Information transfer efficiency.The beam forming processing of via node can promote reliable to destination node link transmission of via node Property, promote the performance of system.

Embodiment of the method five

The present invention is the 5th kind of embodiment of the transmission method of energy and information, setting wireless in wireless energy supply communication network Including at least a source node in energy supply communication network, a via node and a destination node.Noise merit in network Rate isEnergy conversion efficiency η=0.8 of source node.The transmission antenna number of source node and via node For N_r=N_s=3.Self-interference channel at source node isWherein β_ss=-15dB delegated path is lost.Class Seemingly, β_sr=β_rd=β_rr=β_rs=-60dB represents h respectively_sr,h_rd,h_rr,h_rsPath loss.System signal to noise ratio end to end is Bigization formula is:

$\begin{array}{cc}\underset{w_s,w_r}{\max }& SNR=\frac{\left|h_{rd}{w}_r{|}^2\right|h_{sr}{w}_s{|}^2}{{\mathrm{\&delta;}}_r^2|h_{rd}{w}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& h_{rr}{w}_r=0\\ & 0\&le;P_s=\left|\right|w_s|{|}^2\&le;E_s/T\\ & |w_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|\left|w_r\right|{|}^2\&le;P_m\end{array},$

By w_rIt is decomposed into w_r=a_rN_rv_r, maximize formula and be converted into:

$\begin{array}{cc}\underset{w_s,w_r}{\max }& SNR=\frac{a_r^2\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{a_r^2{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & a_r^2\&le;\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\\ & a_r^2\&GreaterEqual;\frac{\left|\right|w_s|{|}^2-\mathrm{\&eta;}|h_{ss}{w}_s{|}^2}{\mathrm{\&eta;}|h_{rs}{N}_r{v}_r{|}^2\left(\right|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2)}\end{array},$

Wherein a_rOptimal solution be:

$a_r^{opt}=\sqrt{\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}},$

Above formula is substituted into above maximization formula, can obtain following optimization formula:

$\begin{array}{cc}\underset{w_s,v_r}{\max }& S(w_s,v_r)=\frac{P_m\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{P_m{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(\right|h_{ss}{w}_s{|}^2+P_m\left|h_{rs}{N}_r{v}_r{|}^2\right)\end{array},$

The global optimum drawing optimized variable is:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

And may certify that f (x) is a unimodal function, obtain the optimal solution of x, therefore v with two way classification_rOptimal solution For:

$v_r^{opt}=x^{opt}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^{opt2}}\frac{{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\&Pi;}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

Before this, a of optimum it has been similarly obtained_r, therefore, it is possible to obtain w_rGlobal optimum be

$w_r^{opt}=a_r^{opt}{N}_r{v}_r^{opt}.$

Fig. 6 is the graph of relation of repeat transmitted power and throughput of system, from fig. 6, it can be seen that the present invention uses entirely Duplex technology, it is proposed that a kind of one-part form transmission plan, i.e. source node, via node and destination node can receive simultaneously/send Signal, prior art uses half duplex techniques, it is impossible to complete to receive/send simultaneously the function of signal, according to the embodiment of the present invention Transmission method, with compared with the transmission method of prior art, under identical repeat transmitted power, handling capacity substantially carries Height, is effectively improved the systematic function of entirety.

Device embodiment one

The present invention is the first embodiment of the transmitting device of energy and information in wireless energy supply communication network, such as Fig. 7 institute Show, be applied to the source node of full duplex in wireless energy supply communication network, described wireless energy supply communication network also includes full duplex Via node and destination node, described device includes:

First wave beam forming unit 701, is used for obtaining signal to be sent, uses the first wave beam forming vector preset to treat Transmission signal carries out wave beam forming and obtains the first signal；

First transmitting element 702, for being only used for sending the first transmission antenna of signal by the first signal by default Send to via node, so that via node receives described first by the second reception antenna being only used for receiving signal preset Signal；

First receives unit 703, for receiving the first letter by default the first reception antenna being only used for receiving signal Number, from the first signal, obtain energy information；

Second receives unit 704, for receiving, by described first reception antenna, the secondary signal sent by via node, Energy information is obtained from secondary signal；Described secondary signal is: described via node uses the second wave beam forming preset Vector carries out wave beam forming acquisition to described first signal, and by the second transmission antenna being only used for sending signal preset Send to destination node and the signal of source node.

To sum up, in embodiments of the present invention, source node can send while signal, collect come from the first signal and The energy of secondary signal, so can effectively promote the performance of whole system.

Device embodiment two

The present invention is the second embodiment of the transmitting device of energy and information in wireless energy supply communication network, such as Fig. 8 institute Show, be applied to the via node of full duplex in wireless energy supply communication network, described wireless energy supply communication network also includes complete double The source node of work and destination node, described device includes:

3rd receives unit 801, for receiving source node by default the second reception antenna being only used for receiving signal The first signal sent；Described first signal is that source node uses the first wave beam forming vector preset to carry out signal to be sent Signal that is that wave beam forming obtains and that sent by the first transmission antenna being only used for sending signal preset；

Second wave beam forming unit 802, for using the second default wave beam forming vector that the first signal is carried out wave beam Figuration obtains secondary signal；

Second transmitting element 803, is used for described second by default the second transmission antenna being only used for transmission signal Signal sends to source node and destination node, so that source node is connect by the first reception antenna being only used for receiving signal preset Receive described secondary signal, and obtain energy from described secondary signal.

To sum up, in embodiments of the present invention, via node can send simultaneously and receive signal, it is possible to effectively promote system Information transfer efficiency.The beam forming processing of via node can promote reliable to destination node link transmission of via node Property, promote the performance of system.

It should be noted that in this article, the relational terms of such as first and second or the like is used merely to a reality Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that Including process, method, article or the equipment of described key element there is also other identical element.

Each embodiment in this specification all uses relevant mode to describe, identical similar portion between each embodiment Dividing and see mutually, what each embodiment stressed is the difference with other embodiments.Real especially for system For executing example, owing to it is substantially similar to embodiment of the method, so describe is fairly simple, relevant part sees embodiment of the method Part illustrate.

The foregoing is only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All Any modification, equivalent substitution and improvement etc. made within the spirit and principles in the present invention, are all contained in protection scope of the present invention In.

Claims (8)

1. energy and the transmission method of information in a wireless energy supply communication network, it is characterised in that be applied to wireless energy supply The source node of full duplex in communication network, also includes via node and the purpose joint of full duplex in described wireless energy supply communication network Point, described method includes:

Obtain signal to be sent, use the first wave beam forming vector preset that signal to be sent is carried out wave beam forming and obtain first Signal；

First signal is sent to via node by the first transmission antenna being only used for sending signal preset, so that relaying joint Point receives described first signal by default the second reception antenna being only used for receiving signal；

Receive the first signal by default the first reception antenna being only used for receiving signal, from the first signal, obtain energy letter Breath；

Receive, by described first reception antenna, the secondary signal sent by via node, from secondary signal, obtain energy letter Breath；Described secondary signal is: described via node uses the second wave beam forming vector preset to carry out described first signal Wave beam forming obtains, and is sent to destination node and source node by the second transmission antenna being only used for sending signal preset Signal.

Energy and the transmission method of information in wireless energy supply communication network the most according to claim 1, it is characterised in that The first described wave beam forming vector is:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

Wherein, η represents the energy conversion efficiency of energy collection circuit, P_mRepresent the transmit power of via node, h_rsRepresent the via node channel to source node, N_rRepresent one and meet h_rrN_r=0 HeMatrix, h_rrRepresent relaying Node is remaining interference channel after time domain self-interference eliminates, Represent h respectively_sr, h_ss's Conjugate transpose, h_srRepresent the source node channel to via node, h_ssRepresent the annular track of source node self；

The second described wave beam forming vector is:

$w_r^{opt}=a_r^{opt}{N}_r{v}_r^{opt},$

Wherein, a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one and meet h_rrN_r=0 He Matrix.

Energy and the transmission method of information in wireless energy supply communication network the most according to claim 1, it is characterised in that The first described wave beam forming vector calculates acquisition as follows:

The signal that via node receives is expressed as: y_r(n)=h_srw_sx_s(n)+h_rrx_r(n)+n_r(n),

Wherein n represents the n-th communication block, h_srRepresent the source node channel to via node, w_sRepresent the first wave beam of source node Figuration vector, x_sN () represents the data that source node sends, h_rrRepresent that via node is remaining after time domain self-interference eliminates Interference channel, x_rN () represents the data that via node sends, n_rN () represents the noise signal that via node receives；

The signal that via node sends is expressed as:

x_r(n)=w_ry_r(n-ω)=w_rh_srw_sx_s(n-ω)+w_rh_rrx_r(n-ω)+w_rn_r(n-ω),

Wherein, w_rRepresenting the second wave beam forming vector of via node, ω represents that relaying is the time of node processing information, y_r(n- ω) represent the signal received at this moment via node of n-ω, h_srRepresent the source node channel to via node, w_sRepresent First wave beam forming vector of source node, ω represents via node processing delay, x_s(n-ω) represents in this moment source of n-ω The information that node sends, x_r(n-ω) represents in the data that this moment via node of n-ω sends, n_r(n-ω) represent n-ω this It is engraved in the additive noise of via node for the moment；

Substitute into h_rrw_rr=0, the signal that via node sends is expressed as:

x_r(n)=w_rh_srw_sx_s(n-ω)+w_rn_r(n-ω)；

The signal that destination node receives is expressed as:

$y_d\left(n\right)=h_{rd}{x}_r\left(n\right)+n_d\left(n\right)=h_{rd}{w}_r{h}_{sr}{w}_s{x}_s(n-\mathrm{\&omega;})+{\tilde{n}}_d\left(n\right),$

Wherein,Represent the noise of destination node；

The signal that source node receives is expressed as:

y_s(n)=h_ssw_sx_s(n)+h_rsx_r(n)+n_s(n)

=h_ssw_sx_s(n)+h_rsw_rh_srw_sx_s(n-ω)+h_rsw_rn_r(n-ω)+n_s(n),

Wherein, x_sN () represents the data that source node sends, x_s(n-ω) represents in the information that this moment source node of n-ω sends, n_r(n-ω) represent n-ω this time be engraved in the additive noise of via node, n_sN () represents the noise signal that source node receives；

The gross energy that in each communication block, source node obtains is expressed as:

$E_S=\mathrm{\&eta;}T\left(\right|h_{ss}{w}_s{|}^2+|h_{rs}{w}_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|h_{rs}{w}_r{|}^2),$

Wherein, 0 < η≤1 represents the efficiency of energy collection of source node, and T represents the persistent period of each communication block,Represent relaying The variance of the additive noise at node reception antenna；

Network throughput is expressed as: R=log₂(1+SNR), wherein, SNR represents signal to noise ratio end to end；

Network throughput to be made is maximum, and system signal to noise ratio end to end maximizes formula and is expressed as:

$\begin{array}{cc}\underset{w_s,w_r}{max}& SNR=\frac{\left|h_{rd}{w}_r{|}^2\right|h_{sr}{w}_s{|}^2}{{\mathrm{\&delta;}}_r^2|h_{rd}{w}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& h_{rr}{w}_r=0\\ & 0\&le;P_s=\left|\right|w_s|{|}^2\&le;E_s/T\\ & |w_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|\left|w_r\right|{|}^2\&le;P_m\end{array},---\left(1\right)$

Wherein, h_rdRepresent the via node channel to destination node, w_rRepresent the second wave beam forming vector of via node, h_srTable Show the source node channel to via node, w_sRepresent the first wave beam forming vector of source node,Represent that destination node receives sky The variance of the additive noise at line,The variance of the additive noise at expression via node reception antenna；h_rrRepresent via node Remaining interference channel after time domain self-interference eliminates, P_SRepresent the transmit power of source node, E_sIn representing each communication block The gross energy that source node receives, E_sExpression formula be:Wherein 0 < η≤1 represents the efficiency of energy collection of source node, and T represents the persistent period of each communication block, P_mRepresent the transmission merit of via node Rate；

By w_rIt is decomposed into w_r=a_rN_rv_r, wherein a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one completely Foot h_rrN_r=0 HeMatrix, thus, described maximization formula (1) is transformed into:

$\begin{array}{cc}\underset{w_s,w_r}{max}& SNR=\frac{a_r^2\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{a_r^2{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & a_r^2\&le;\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\\ & a_r^2\&GreaterEqual;\frac{\left|\right|w_s|{|}^2-\mathrm{\&eta;}|h_{ss}{w}_s{|}^2}{\mathrm{\&eta;}|h_{rs}{N}_r{v}_r{|}^2\left(|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2\right)}\end{array},---\left(2\right)$

In the case of ensureing feasibility, a_rOptimal solution be:

$a_r^{opt}=\sqrt{\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}},$

By a_rOptimal solution substitute into maximize formula (2), obtain maximize formula (3):

$\begin{array}{cc}\underset{w_s,v_r}{max}& S(w_s,v_r)=\frac{P_m\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{P_m{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(|h_{ss}{w}_s{|}^2+P_m|h_{rs}{N}_r{v}_r{|}^2\right)\end{array},---\left(3\right)$

v_rThe parameter being expressed as:

$v_r=x\frac{{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^2}\frac{{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

Wherein 0≤x≤1, RepresentConjugate transpose,RepresentConjugation turn Putting, η represents the energy conversion efficiency of energy collection circuit, ∏_XRepresent the column space rectangular projection to X,Represent to X row sky Between orthocomplement, orthogonal complement projection, therefore, maximize formula (3) be equivalent to:

$\begin{array}{cc}\underset{0\&le;x\&le;1}{max}& f\left(x\right)\end{array},$

Wherein f (x) is defined as:

$f\left(x\right)=\underset{w_s}{max}S(w_s,v_r(x\left)\right)$

$\begin{array}{cc}s.t.& \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(\right|h_{ss}{w}_s{|}^2+P_m\left|{\tilde{h}}_{rs}{v}_r\right(x\left){|}^2\right)\end{array},$

Thus, w is drawn_sGlobal optimum be:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

WhereinAndRepresent h respectively_sr, h_ssConjugate transpose；

Described second wave beam forming vector calculates acquisition as follows:

WillExpression formula substitute into and maximize formula (3), obtain the Explicit functions of function f (x):

$f\left(x\right)=\frac{P_m{a}^2{b}^2{(cx+d\sqrt{1-x^2})}^2}{P_m{b}^2+a^2(c+d\sqrt{\frac{1}{x^2}-1})+\frac{{\mathrm{\&delta;}}_r^2{\mathrm{\&delta;}}_d^2}{x^2}},$

Wherein,

F (x) is a unimodal function, obtains the optimal solution of x, therefore v with two way classification_rOptimal solution be:

$v_r^{opt}=x^{opt}\frac{{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^{opt2}}\frac{{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

A described in conjunction with_rOptimal solution, obtain w_rGlobal optimum be

4. energy and the transmission method of information in a wireless energy supply communication network, it is characterised in that be applied to wireless energy supply The via node of full duplex in communication network, also includes source node and the purpose joint of full duplex in described wireless energy supply communication network Point, described method includes:

The first signal that source node sends is received by default the second reception antenna being only used for receiving signal；Described first letter Number use for source node the first wave beam forming vector preset signal to be sent carried out wave beam forming acquisition and by presetting Be only used for send signal first transmission antenna send signal；

Use the second wave beam forming vector preset that the first signal is carried out wave beam forming and obtain secondary signal；

Described secondary signal is sent to source node and target joint by default the second transmission antenna sending signal that is only used for Point, so that source node receives described secondary signal by the first reception antenna being only used for receiving signal preset, and from described Secondary signal obtains energy.

A kind of energy and the transmission method of information, its feature in wireless energy supply communication network the most according to claim 4 Being, the first described wave beam forming vector is:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

Wherein, η represents the energy conversion efficiency of energy collection circuit, P_mRepresent the transmit power of via node, h_rsRepresent the via node channel to source node, N_rRepresent one and meet h_rrN_r=0 HeMatrix, h_rrRepresent relaying Node is remaining interference channel after time domain self-interference eliminates, Represent h respectively_sr, h_ss's Conjugate transpose, h_srRepresent the source node channel to via node, h_ssRepresent the annular track of source node self；

The second described wave beam forming vector is:

Wherein, a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one and meet h_rrN_r=0 He Matrix.

A kind of energy and the transmission method of information, its feature in wireless energy supply communication network the most according to claim 4 Being, the first described wave beam forming vector calculates acquisition as follows:

The signal that via node receives is expressed as: y_r(n)=h_srw_sx_s(n)+h_rrx_r(n)+n_r(n),

Wherein n represents the n-th communication block, h_srRepresent the source node channel to via node, w_sRepresent the first wave beam of source node Figuration vector, x_sN () represents the data that source node sends, h_rrRepresent that via node is remaining after time domain self-interference eliminates Interference channel, x_rN () represents the data that via node sends, n_rN () represents the noise signal that via node receives；

The signal that via node sends is expressed as:

x_r(n)=w_ry_r(n-ω)=w_rh_srw_sx_s(n-ω)+w_rh_rrx_r(n-ω)+w_rn_r(n-ω),

Wherein, w_rRepresenting the second wave beam forming vector of via node, ω represents that relaying is the time of node processing information, y_r(n- W) signal received at this moment via node of n-ω, h are represented_srRepresent the source node channel to via node, w_sRepresent First wave beam forming vector of source node, ω represents via node processing delay, x_s(n-ω) represents in this moment source of n-ω The information that node sends, x_r(n-ω) represents in the data that this moment via node of n-ω sends, n_r(n-ω) represent n-ω this It is engraved in the additive noise of via node for the moment；

Substitute into h_rrw_rr=0, the signal that via node sends is expressed as:

x_r(n)=w_rh_srw_sx_s(n-ω)+w_rn_r(n-ω)；

The signal that destination node receives is expressed as:

$y_d\left(n\right)=h_{rd}{x}_r\left(n\right)+n_d\left(n\right)=h_{rd}{w}_r{h}_{sr}{w}_s{x}_s(n-\mathrm{\&omega;})+{\tilde{n}}_d\left(n\right),$

Wherein,Represent the noise of destination node；

The signal that source node receives is expressed as:

y_s(n)=h_ssw_sx_s(n)+h_rsx_r(n)+n_s(n)

=h_ssw_sx_s(n)+h_rsw_rh_srw_sx_s(n-ω)+h_rsw_rn_r(n-ω)+n_s(n),

Wherein, x_sN () represents the data that source node sends, n_s(n-ω) represents in the information that this moment source node of n-ω sends, n_r(n-ω) represent n-ω this time be engraved in the additive noise of via node, n_sN () represents the noise signal that source node receives；

The gross energy that in each communication block, source node obtains is expressed as:

$E_S=\mathrm{\&eta;}T\left(\right|h_{ss}{w}_s{|}^2+|h_{rs}{w}_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|h_{rs}{w}_r{|}^2),$

Wherein, 0 < η≤1 represents the efficiency of energy collection of source node, and T represents the persistent period of each communication block,Represent relaying The variance of the additive noise at node reception antenna；

Network throughput is expressed as: R=log₂(1+SNR), wherein, SNR represents signal to noise ratio end to end；

Network throughput to be made is maximum, and system signal to noise ratio end to end maximizes formula and is expressed as:

$\begin{array}{cc}\underset{w_s,w_r}{max}& SNR=\frac{\left|h_{rd}{w}_r{|}^2\right|h_{sr}{w}_s{|}^2}{{\mathrm{\&delta;}}_r^2|h_{rd}{w}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& h_{rr}{w}_r=0\\ & 0\&le;P_s=\left|\right|w_s|{|}^2\&le;E_s/T\\ & |w_r{h}_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2|\left|w_r\right|{|}^2\&le;P_m\end{array},---\left(1\right)$

Wherein, h_rdRepresent the via node channel to destination node, w_rRepresent the second wave beam forming vector of via node, h_srTable Show the source node channel to via node, w_sRepresent the first wave beam forming vector of source node,Represent that destination node receives sky The variance of the additive noise at line,The variance of the additive noise at expression via node reception antenna；h_rrRepresent via node Remaining interference channel after time domain self-interference eliminates, P_SRepresent the transmit power of source node, E_sIn representing each communication block The gross energy that source node receives, E_sExpression formula be:Wherein 0 < η≤1 represents the efficiency of energy collection of source node, and T represents the persistent period of each communication block, P_mRepresent the transmission merit of via node Rate；

By w_rIt is decomposed into w_r=a_rN_rv_r, wherein a_rRepresent the power amplification factor, v_rRepresent wave beam dominant vector, N_rRepresent one completely Foot h_rrN_r=0 HeMatrix, thus, described maximization formula (1) is transformed into:

$\begin{array}{cc}\underset{w_s,w_r}{max}& SNR=\frac{a_r^2\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{a_r^2{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & a_r^2\&le;\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\\ & a_r^2\&GreaterEqual;\frac{\left|\right|w_s|{|}^2-\mathrm{\&eta;}|h_{ss}{w}_s{|}^2}{\mathrm{\&eta;}|h_{rs}{N}_r{v}_r{|}^2\left(|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2\right)}\end{array},---\left(2\right)$

In the case of ensureing feasibility, a_rOptimal solution be:

$a_r^{opt}=\sqrt{\frac{P_m}{|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}},$

By a_rOptimal solution substitute into maximize formula (2), obtain maximize formula (3):

$\begin{array}{cc}\underset{w_s,v_r}{max}& S(w_s,v_r)=\frac{P_m\left|h_{rd}{N}_r{v}_r{|}^2\right|h_{sr}{w}_s{|}^2}{P_m{\mathrm{\&delta;}}_r^2|h_{rd}{N}_r{v}_r{|}^2+{\mathrm{\&delta;}}_d^2|h_{sr}{w}_s{|}^2+{\mathrm{\&delta;}}_r^2}\end{array}$

$\begin{array}{cc}subjectto& \left|\right|v_r|{|}^2=1\\ & \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(|h_{ss}{w}_s{|}^2+P_m|h_{rs}{N}_r{v}_r{|}^2\right)\end{array},---\left(3\right)$

v_rThe parameter being expressed as:

$v_r=x\frac{{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^2}\frac{{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

Wherein 0≤x≤1, RepresentConjugate transpose,RepresentConjugation turn Putting, η represents the energy conversion efficiency of energy collection circuit, ∏_XRepresent the column space rectangular projection to X,Represent to X row sky Between orthocomplement, orthogonal complement projection, therefore, maximize formula (3) be equivalent to:

$\begin{array}{cc}\underset{0\&le;x\&le;1}{max}& f\left(x\right)\end{array},$

Wherein f (x) is defined as:

$f\left(x\right)=\underset{w_s}{max}S(w_s,v_r(x\left)\right)$

$\begin{array}{cc}s.t.& \left|\right|w_s|{|}^2\&le;\mathrm{\&eta;}\left(\right|h_{ss}{w}_s{|}^2+P_m\left|{\tilde{h}}_{rs}{v}_r\right(x\left){|}^2\right)\end{array},$

Thus, w is drawn_sGlobal optimum be:

$w_s^{opt}=\sqrt{{\mathrm{\&eta;P}}_m}\left|{\tilde{h}}_{rs}{v}_r\right|\frac{B^{-1}{h}_{sr}^H}{\left|\right|B^{-1/2}{h}_{sr}^H\left|\right|},$

WhereinAndRepresent h respectively_sr, h_ssConjugate transpose；

Described second wave beam forming vector calculates acquisition as follows:

WillExpression formula substitute into and maximize formula (3), obtain the Explicit functions of function f (x):

$f\left(x\right)=\frac{P_m{a}^2{b}^2{(cx+d\sqrt{1-x^2})}^2}{P_m{b}^2+a^2(c+d\sqrt{\frac{1}{x^2}-1})+\frac{{\mathrm{\&delta;}}_r^2{\mathrm{\&delta;}}_d^2}{x^2}},$

Wherein,

F (x) is a unimodal function, obtains the optimal solution of x, therefore v with two way classification_rOptimal solution be:

$v_r^{opt}=x^{opt}\frac{{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H}{\left|\right|{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}{\tilde{h}}_{rd}^H\left|\right|}+\sqrt{1-x^{opt2}}\frac{{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H}{\left|\right|{\mathrm{\&Pi;}}_{{\tilde{h}}_{rs}^H}^{\&perp;}{\tilde{h}}_{rd}^H\left|\right|},$

A described in conjunction with_rOptimal solution, obtain w_rGlobal optimum be

7. energy and the transmitting device of information in a wireless energy supply communication network, it is characterised in that be applied to wireless energy supply The source node of full duplex in communication network, also includes via node and the purpose joint of full duplex in described wireless energy supply communication network Point, described device includes:

First wave beam forming unit, is used for obtaining signal to be sent, uses the first wave beam forming vector preset to letter to be sent Number carrying out wave beam forming obtains the first signal；

First transmitting element, in being used for being sent extremely the first signal by the first transmission antenna being only used for sending signal preset Continue node, so that via node receives described first signal by the second reception antenna being only used for receiving signal preset；

First receives unit, for receiving the first signal by default the first reception antenna being only used for receiving signal, from the One signal obtains energy information；

Second receives unit, for receiving the secondary signal sent by via node, from second by described first reception antenna Signal obtains energy information；Described secondary signal is: described via node uses the second wave beam forming vector preset right Described first signal carries out wave beam forming acquisition, and is sent extremely by the second transmission antenna being only used for sending signal preset Destination node and the signal of source node.

8. energy and the transmitting device of information in a wireless energy supply communication network, it is characterised in that be applied to wireless energy supply The via node of full duplex in communication network, also includes source node and the purpose joint of full duplex in described wireless energy supply communication network Point, described device includes:

3rd receives unit, for receive that source node sends by default the second reception antenna being only used for receiving signal the One signal；Described first signal is that source node uses the first wave beam forming vector preset that signal to be sent is carried out wave beam forming Signal that is that obtain and that sent by the first transmission antenna being only used for sending signal preset；

Second wave beam forming unit, obtains for using the second default wave beam forming vector that the first signal is carried out wave beam forming Secondary signal；

Second transmitting element, for sending described secondary signal by default the second transmission antenna being only used for sending signal To source node and destination node, so that source node receives described the by the first reception antenna being only used for receiving signal preset Binary signal, and obtain energy from described secondary signal.