CN107070505A - A kind of method, system and transmitting terminal for lifting rectification efficiency - Google Patents
A kind of method, system and transmitting terminal for lifting rectification efficiency Download PDFInfo
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- CN107070505A CN107070505A CN201610973128.5A CN201610973128A CN107070505A CN 107070505 A CN107070505 A CN 107070505A CN 201610973128 A CN201610973128 A CN 201610973128A CN 107070505 A CN107070505 A CN 107070505A
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- H04B5/79—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0042—Digital filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
- 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
- H04L25/0202—Channel estimation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
This application provides a kind of method, system and transmitting terminal for lifting rectification efficiency, the method for lifting rectification efficiency includes：Receive the pilot signal of rectifier terminal transmitting；Channel condition information is obtained from pilot signal；Using channel condition information and Waveform Design algorithm, the parametric results of many sinusoidal signal waveforms for the nonlinear waveform structure for meeting rectifier terminal are calculated；Generate the corresponding many sinusoidal radio frequency energy signals of parametric results；The corresponding many sinusoidal radio frequency energy signals of parametric results are sent to the rectifier terminal, so that the corresponding many sinusoidal radio frequency energy signals of the parametric results are converted to DC energy signal by rectifier terminal.In this application, by being realized with upper type in the case where not changing the transmission power of transmitting terminal, RF energy is converted into the efficiency of DC energy by lifting.
Description
Technical field
The application is related to wireless charging and the communications field, more particularly to a kind of method, system and hair for lifting rectification efficiency
Penetrate end.
Background technology
Turning into wireless energy biography transmitting wireless energy by radio frequency (RF-Radio Frequency) energy mode
Under the new trend in defeated (WPT-Wireless Power Transfer) field, wireless radiofrequency charging system is applied and given birth to, and it is utilized
RF energy mode transmits wireless energy, realizes medium and long distance wireless charging.
It is always limitation of radio frequency but RF energy is converted into the inefficient of DC energy in wireless radiofrequency charging system
The key factor of wireless charging system development, therefore how to lift RF energy in wireless radiofrequency charging system and be converted into direct current energy
The efficiency of amount, as urgent problem to be solved.
The content of the invention
In order to solve the above technical problems, the embodiment of the present application provides a kind of method, system and transmitting for lifting rectification efficiency
End, realizes in the case where not changing the transmission power of transmitting terminal, RF energy is converted into DC energy by lifting to reach
The purpose of efficiency, technical scheme is as follows：
A kind of method for lifting rectification efficiency, applied to transmitting terminal, methods described includes：
Receive the pilot signal of rectifier terminal transmitting；
Channel condition information is obtained from the pilot signal；
Using the channel condition information and Waveform Design algorithm, the nonlinear waveform structure for meeting the rectifier terminal is calculated
Many sinusoidal signal waveforms parametric results；
Generate the corresponding many sinusoidal radio frequency energy signals of the parametric results；
The corresponding many sinusoidal radio frequency energy signals of the parametric results are sent to the rectifier terminal, so that the rectifier terminal will
The corresponding many sinusoidal radio frequency energy signals of the parametric results are converted to DC energy signal.
It is preferred that, using the channel condition information and Waveform Design algorithm, calculating meets the non-linear of the rectifier terminal
The parametric results of many sinusoidal signal waveforms of waveform configuration, including：
Utilize relational expression Max iout≈k0+zDC(S, Φ) and the channel condition information, calculating meets described
The parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure of rectifier terminal, wherein,vd(t)
It is diode both end voltage, isFor diode reverse biased saturation current, vtIt is diode threshold voltage, n is diode PN junction reason
Think the factor, y (t) is the reception signal waveform of the rectifier terminal, ioutFor the output current of the rectifier terminal, n0For Taylor expansion
The exponent number of formula, i even represent the even item of i values,Table is RantI/2 power, ε { } be averaging operator or expectation, y (t)i
For y (t) i power, RantFor antenna impedance.
A kind of transmitting terminal, including：Transmitting terminal array antenna module, transmitting end channel estimation module, transmitting terminal Waveform Design
Module and transmitting terminal signal generator module；
The transmitting terminal array antenna module, the pilot signal for receiving rectifier terminal transmitting, and send the transmitting
Many sinusoidal radio frequency energy signals of end signal generation module generation, so that the rectifier terminal is by the transmitting terminal signal generator module
Many sinusoidal radio frequency energy signals of generation are converted to DC energy signal；
The transmitting end channel estimation module, for obtaining channel condition information from the pilot signal；
The transmitting terminal Waveform Design module, for utilizing the channel condition information and Waveform Design algorithm, calculates symbol
Close the parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure of the rectifier terminal；
The transmitting terminal signal generator module, for generating the corresponding many sinusoidal radio frequency energy signals of the parametric results.
It is preferred that, the transmitting terminal Waveform Design module includes：First baseband chip, for utilizing relational expression Max iout
≈k0+zDC(S, Φ) and the channel condition information, calculates many sinusoidal letters for the nonlinear waveform structure for meeting the rectifier terminal
The parametric results of number waveform, wherein,
vd(t) it is diode both end voltage, isFor diode reverse biased saturation current, vtIt is diode threshold voltage, n is diode
PN junction ideal factor, y (t) is the reception signal waveform of the rectifier terminal, ioutFor the output current of the rectifier terminal, n0For Thailand
The exponent number of expansion is strangled, i even represent the even item of i values,Table is RantI/2 power, ε { } be averaging operator or phase
Hope, y (t)iFor y (t) i power, RantFor antenna impedance.
It is preferred that, the transmitting terminal array antenna module includes：Micro-strip array antenna unit.
It is preferred that, the transmitting end channel estimation module includes：Zero intermediate frequency chip, A/D converter and the second baseband chip；
The zero intermediate frequency chip, for the pilot signal to be converted into base-band analog signal；
The A/D converter, for the base-band analog signal to be converted into baseband digital signal；
Second baseband chip, for carrying out channel estimation to the baseband digital signal, obtains channel condition information.
It is preferred that, the transmitting terminal signal generator module includes：Radiofrequency signal chip, signal modulation circuit and power amplification
Circuit；
The radiofrequency signal chip, what is obtained for being calculated according to first baseband chip meets the non-of the rectifier terminal
The parametric results of many sinusoidal signal waveforms of linear waveform structure, generate original sine ripple；
The signal modulation circuit, for being adjusted to the original sine ripple, generates many sinusoidal radio frequency energy
Signal；
The power amplification circuit, for being amplified to many sinusoidal radio frequency energy signals.
A kind of system for lifting rectification efficiency, including：Rectifier terminal and the transmitting terminal as described in above-mentioned any one, it is described whole
Stream end includes：Rectifier terminal array antenna module, rectifier terminal rectification circuit module and rectifier terminal pilot tone generation module；
The rectifier terminal array antenna module, for launching pilot signal, and receive the transmitting terminal transmitting more just
String RF energy signal；
The rectifier terminal rectification circuit module, DC energy signal is converted to for many sinusoidal radio frequency energy signals；
The rectifier terminal pilot tone generation module, for generating the pilot signal.
It is preferred that, the rectifier terminal array antenna module includes：Micro-strip array antenna unit.
It is preferred that, the rectifier terminal rectification circuit module includes：Rectification circuit, match circuit and output filter；
The match circuit, for many sinusoidal radio frequency energy signals to be transferred into the rectification circuit completely；
The rectification circuit, for many sinusoidal radio frequency energy signals transmitted through the match circuit to be rectified into direct current energy
Measure signal；
The output filter, the high-frequency signal in signal for filtering out the rectification circuit output, exports described straight
Stream energy signal.
It is preferred that, the rectifier terminal pilot tone generation module includes：Single-chip microcomputer, radiofrequency signal produce chip and power amplification electricity
Road；
The single-chip microcomputer, for generating control instruction according to default pilot configuration, and exports the control instruction to described
Radiofrequency signal produces chip；
The radiofrequency signal produces chip, for generating pilot signal according to the control instruction；
The power amplification circuit, for the pilot signal to be amplified and exported.
Compared with prior art, the application has the beneficial effect that：
In this application, do not limited by the performance and rectifier circuit structure of rectifying device in wireless radiofrequency charging system,
Transmitted waveform to transmitting terminal is improved, using the channel condition information in Waveform Design algorithm and pilot signal, calculates symbol
The parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure of the rectifier terminal are closed, and generate the parametric results correspondence
Many sinusoidal radio frequency energy signals, and send many sinusoidal radio frequency energy signals to rectifier terminal, enable rectifier terminal by many sinusoidal radio frequencies
Amount signal is maximized to be converted to DC energy signal, realizes in the case where not changing the transmission power of transmitting terminal, and lifting will
RF energy is converted into the efficiency of DC energy.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the present application, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present application, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these accompanying drawings
His accompanying drawing.
Fig. 1 is a kind of flow chart of the method for the lifting rectification efficiency that the application is provided；
Fig. 2 (a) is a kind of schematic diagram of antenna circuit, and Fig. 2 (b) is a kind of schematic diagram of equivalent aerial circuit；
Fig. 3 is a kind of schematic diagram of rectification circuit；
Fig. 4 is a kind of logical construction schematic diagram for the transmitting terminal that the application is provided；
Fig. 5 is a kind of logical construction schematic diagram of the system for the lifting rectification efficiency that the application is provided；
Fig. 6 is the transmitting terminal that the application is provided and the work interaction schematic diagram of rectifier terminal.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.It is based on
Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of the application protection.
Embodiment one
Fig. 1 is referred to, a kind of flow chart of the method for the lifting rectification efficiency provided it illustrates the application can include
Following steps：
Step S11：Receive the pilot signal of rectifier terminal transmitting.
The pilot signal of rectifier terminal transmitting carries out channel estimation for transmitting terminal.
Step S12：Channel condition information is obtained from the pilot signal.
Step S13：Using the channel condition information and Waveform Design algorithm, calculating meets the non-linear of the rectifier terminal
The parametric results of many sinusoidal signal waveforms of waveform configuration.
The core rectifying device of rectifier terminal is a nonlinear device, is found after research and testing, and single sine wave is not
It is adapted to the optimum waveform design of nonlinear model, it is more sinusoidal that the nonlinear model set up according to rectifier terminal nonlinear characteristic is drawn
Ripple is more suitable for nonlinear model, by emulation and verification experimental verification, under same input power, and many sine wave designs, which can be lifted, penetrates
Frequently the rectification efficiency of-direct current.And implementing for many sine wave designs is then to utilize the channel condition information and Waveform Design
Algorithm, calculates the parametric results of many sinusoidal signal waveforms for the nonlinear waveform structure for meeting the rectifier terminal.
Wherein, using the channel condition information and Waveform Design algorithm, the nonlinear wave for meeting the rectifier terminal is calculated
The parametric results of many sinusoidal signal waveforms of shape structure are the structure according to rectifier terminal, and finding maximizes rectifier terminal rectification efficiency
Optimal transmitted waveform parametric results.
Step S14：Generate the corresponding many sinusoidal radio frequency energy signals of the parametric results.
Step S15：The corresponding many sinusoidal radio frequency energy signals of the parametric results are sent to the rectifier terminal, so that institute
State rectifier terminal and the corresponding many sinusoidal radio frequency energy signals of the parametric results are converted into DC energy signal.
In this application, do not limited by the performance and rectifier circuit structure of rectifying device in wireless radiofrequency charging system,
Transmitted waveform to transmitting terminal is improved, using the channel condition information in Waveform Design algorithm and pilot signal, calculates symbol
The parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure of the rectifier terminal are closed, and generate the parametric results correspondence
Many sinusoidal radio frequency energy signals, and send many sinusoidal radio frequency energy signals to rectifier terminal, enable rectifier terminal by many sinusoidal radio frequencies
Amount signal is maximized to be converted to DC energy signal, realizes in the case where not changing the transmission power of transmitting terminal, and lifting will
RF energy is converted into the efficiency of DC energy.
In the present embodiment, using the channel condition information and Waveform Design algorithm, calculating meets the rectifier terminal
The parametric results of many sinusoidal signal waveforms of nonlinear waveform structure, are specifically as follows：
Utilize relational expression Max iout≈k0+zDC(S, Φ) and the channel condition information, calculating meets described
The parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure of rectifier terminal, wherein,vd(t)
It is diode both end voltage, isFor diode reverse biased saturation current, vtIt is diode threshold voltage, n is diode PN junction reason
Think the factor, y (t) is the reception signal waveform of the rectifier terminal, ioutFor the output current of the rectifier terminal, n0For Taylor expansion
The exponent number of formula, i even represent the even item of i values,Table is RantI/2 power, ε { } be averaging operator or expectation, y (t)i
For y (t) i power, RantFor antenna impedance.
Utilize relational expression Max iout≈k0+zDC(S, Φ), can calculate rectifier output dc power of sening as an envoy to maximum (whole
Flow device output current ioutRepresent) optimal transmission signal amplitude and phase combination, i.e., optimum waveform design.
Wherein, relational expression Max iout≈k0+zDCThe derivation of (S, Φ) is as follows：
First, by taking infinite energy Transmission system model as an example, wherein infinite energy Transmission system model is generally existing model,
It is unrelated with rectification end structure.
According to parameters such as transmitter antenna number, sinusoidal undulation number, reception antenna number, time t, obtained according to multi-path transmission characteristic
To rectifier receiving power signal y (t) and transmitted waveform xm(t) relational expression (1)；
Relational expression (1) is
The derivation of relational expression (1) is：
Transmitter antenna number M, sinusoidal wave beam N, be by transmitting antenna m=1 ... the M signals launched in time t：sn,mAnd φn,mM transmitting antennas n-th are represented respectivelythSine wave is in frequency
Rate ωnAmplitude and phase；Under frequency-flat distribution, the amplitude and phase of sine wave can into matrix S and Φ, matrix S's and Φ
(n, m) can be write as sn,mAnd φn,m；By transmitter power limitation and signal amplitude relation, all transmission signals are stacked, must can be sent out
Penetrate signal phasorWherein wn=[wn,1...wn,M]T；Multi-antenna transmission sine wave passes through multipath
Propagate L to propagate, delay, amplitude, phase and the directional information of L path are by τl、αl、ξl、θlRepresent, l=1 ..., L；Transmitting antenna
Spacing is nearer, to all transmitting antenna τl、αl、ξlIt is identical, formula ζn,m,l=ξl+Δn,m,l, Δn,m,lRepresent mthTransmitting
Phase offset between antenna and first antenna；M transmitting antennas transmission signal is via the signal being received after Multipath Transmission
Formula：
Wherein amplitude An,mWith phase ψn,mFor：Wherein m antennas are ω in frequencyn's
Frequency response isVector channel is hn=[hn,1...hn,M]；Then obtain relation
Formula (1), wherein
Embody in relational expression (1) rectifier receive signal y (t) and various transmitted waveform parameters, antenna number, sinusoidal undulation number,
The relation of multi-path transmission situation etc..
2nd, the foundation of the rectifier nonlinear model of rectifier terminal：
A, the antenna circuit as shown in Fig. 2 (a), input impedance is RinRectifier, with impedance be RantReception antenna connect
Connect, vinFor the voltage expression of rectenna receiver power signal.Assuming that antenna is lossless, then a voltage source V is equivalent tosSeries connection
One Rant=50 Ω impedance, the antenna circuit shown in Fig. 2 (a) is equivalent to the antenna circuit shown in figure Fig. 2 (b).
Antenna and good (the i.e. R of rectifier matchingin=Rant), then receiving power is transformed into the input impedance of rectifier completely；
Rectifier input power signal is y (t), then can obtain vSAnd vin(t) on y (t) and RantRelational expression (2).
Relational expression (2) is
The derivation of relational expression (2) is：
The power that reception antenna is received is Pav=ε | y (t) |2, v can be equivalent tos(t) the source-series R of voltageant=50 Ω
Antenna impedance, matches rear Rin=Rant, the power P of receptionavThe input impedance of reception antenna is all transferred to, thenvin(t) reception antenna input voltage is represented；Under matching,With
Then obtain relational expression (2).
B, a kind of simple rectifier (rectification circuit) are as shown in Figure 3.Due to commutation diode pressure drop vd(t)=vin(t)-
vout(t), and the electric current i of commutation diode is flowed throughdAnd v (t)d(t) it is related, according to commutation diode characteristic and relational expression (2)
It can obtain id(t) with rectifier output voltage voutAnd rectifier input signal y (t) relational expressions (3) (t)；
Relational expression (3) is
The derivation of relational expression (3) is：
Above-mentioned formula, wherein v can be drawn by rectification circuit figured(t) it is diode both end voltage, id(t) it is diode electricity
Road, isFor diode reverse biased saturation current, vtIt is diode threshold voltage, n is diode PN junction ideal factor；
To annotate the non-linear of diode, utilization index Taylor expansion expansion relational expression (3), fixed diode drop vd
(t)=a, is obtainedWherein：AndDue to rectification circuit input voltage vin(t) with output voltage vout(t) all it is on transmitting
The function (and with time fluctuation) of waveform, it is easy to release commutation diode electric current id(t) it is related to waveform parameter；And quiet
Under state response, rectifier can pass out a constant output voltage vout(follow input voltage vin(t) peak-peak), because
This passes to the output current i of loadoutEqually it is constant；In ideal rectifier, voutIt is constant, then obtainsAnd due toWhereinRepresent vin(t) most significantly
ValueThen obtain relational expression (4).
Relational expression (4) is
Relational expression (4) fully demonstrates commutation diode electric current id(t) signal waveform y (t) and transmitted waveform { x, is receivedm
(t) subordinate relation between }；
C, rectifier nonlinear model foundation
Problem is how design transmitted waveform { xm(t) } make output DC current maximum；Due to i under steady-error coefficientout=
ε{id(t) }, to make this optimization problem disposable, according to relational expression (4), block Taylor expansion and arriveRank, then obtainRelational expression (1) is imported into the formula, by sine wave characteristics and mathematical derivation
Draw formula of many sine waves through Multipath Transmission in the direct current output of rectification circuit：Relational expression (5) is iout≈k0+zDC(S,
Φ), wherein,(relational expression 5-1).
Relational expression (5) embodies output current ioutSignal y (t) relation is received with rectifier, y (t) contains waveform ginseng
Number etc..
Derived from relational expression (5), the even-order more than or equal to 4 embodies the non-linear behavior of rectifying device.
3rd, the Waveform Design of limit energy transmission
A, Waveform Design target
Emitter obtains rectifier characteristic and CSI (channel condition information Channel State Information), target
It is to find to make rectifier export dc power maximum (rectifier current output ioutRepresent) optimal transmission signal amplitude and phase
Bit combination, i.e. optimum waveform are designed.
CSI is obtained from pilot signal；Rectifier characteristic acquisition pattern is not fixed, and can include it by editing pilot tone
Relevant information, also can other modes obtain, the rectifier of different templates is inherently included in such as emitter, different rectifications are run into
Device just selects different templates；Or artificial input information.
So-called Waveform Design process, is exactly, using rectifier characteristic and CSI design waveforms, to be set and sent out according to these information
The parameter of ejected wave shape, this is embodied in the offering question to waveform parameter；
Such as, in CSI obtain channel in attenuation parameter it is necessary to by the factor of decay consider Waveform Design during mended
Repay, the parameter of transmitted waveform changes with regard to therefore information；
Ki just represents rectifier characteristic in relational expression (5), and y (t) is just comprising the channel information obtained from CSI；
The strategy of Waveform Design is exactly to make transmission signal try one's best to meet any Taylor expansion in relational expression (5)；
B, Waveform Design problem conversion
Waveform optimization problem is converted into the maximization problems of relational expression (5), i.e. ioutMaximization problems (1)；
ioutMaximization problems (1) be relational expression Max iout≈k0+zDC(S, Φ).
It should be noted that in actual operation, utilizing relational expression Max iout≈k0+zDC(S, Φ) and the channel shape
State information, the parametric results of many sinusoidal signal waveforms for calculating the nonlinear waveform structure for meeting the rectifier terminal are specially：It is logical
Cross and derive and introduce corresponding auxiliary variable, ioutMaximization problems (1) is converted into a reverse geometric programming (Reverse
Geometric Program) problem (2)；By some auxiliary software, such as CVX (Concurrent Versions System),
Solve problems (2), obtain meeting the nonlinear waveform that the maximized waveform parameter result of relational expression (5) meets the rectifier terminal
The parametric results of many sinusoidal signal waveforms of structure.
Specifically, the parametric results for meeting many sinusoidal signal waveforms of the nonlinear waveform structure of the rectifier terminal are
The wave-shape amplitude parameter and phase parameter of each sine wave of each antenna of the value of (S, Φ), i.e. transmitting antenna, are joined using this waveform
The waveform that number is sent can lift the rectification efficiency of correspondence rectifier.
The parametric results for best suiting many sinusoidal signal waveforms of the nonlinear waveform structure of the rectifier terminal represent optimal
Waveform Design, according to the nonlinear waveform structure for meeting the rectifier terminal many sinusoidal signal waveforms parametric results design send out
Ejected wave shape, you can the signal aspect for making to reach rectifier terminal is Optimal Signals form.
It should be noted that above-mentioned derivation is applicable any type of rectifier circuit structure, Waveform Design algorithm can be with
Drawn according to actual rectifier circuit structure.
Embodiment two
It is corresponding with above method embodiment, a kind of transmitting terminal is present embodiments provided, Fig. 4 is referred to, transmitting terminal includes：
Transmitting terminal array antenna module 41, transmitting end channel estimation module 42, transmitting terminal Waveform Design module 43 and transmitting end signal production
Raw module 44.
The transmitting terminal array antenna module 41, the pilot signal for receiving rectifier terminal transmitting, and send the hair
Many sinusoidal radio frequency energy signals of the generation of end signal generation module 44 are penetrated, so that the rectifier terminal produces the transmitting end signal
Many sinusoidal radio frequency energy signals that module 44 is generated are converted to DC energy signal.
The transmitting end channel estimation module 42, for obtaining channel condition information from the pilot signal.
The transmitting terminal Waveform Design module 43, for utilizing the channel condition information and Waveform Design algorithm, is calculated
Meet the parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure of the rectifier terminal.
The transmitting terminal signal generator module 44, for generating the corresponding many sinusoidal radio frequency energy letters of the parametric results
Number.
In the present embodiment, transmitting terminal Waveform Design module 43 can specifically include：First baseband chip,
For utilizing relational expression Max iout≈k0+zDC(S, Φ) and the channel condition information, calculating meets described whole
The parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure at end are flowed, wherein,vd(t)
It is diode both end voltage, isFor diode reverse biased saturation current, vtIt is diode threshold voltage, n is diode PN junction reason
Think the factor, y (t) is the reception signal waveform of the rectifier terminal, ioutFor the output current of the rectifier terminal, n0For Taylor expansion
The exponent number of formula, i even represent the even item of i values,Table is RantI/2 power, ε { } be averaging operator or expectation, y (t)i
For y (t) i power, RantFor antenna impedance.
In the present embodiment, transmitting terminal array antenna module 41 can with but be not limited to：Micro-strip array antenna unit.
The workflow of micro-strip array antenna unit：Wireless signal in space is converted into high frequency electric；By antenna element
Upper high frequency electric is converted into wireless signal in space.
In above-mentioned transmitting terminal, transmitting end channel estimation module 42 can include：(i.e. radio frequency-IQ is demodulated zero intermediate frequency chip
Device), A/D converter and the second baseband chip.
The zero intermediate frequency chip, for the pilot signal to be converted into base-band analog signal.
The A/D converter, for the base-band analog signal to be converted into baseband digital signal.
Second baseband chip, for carrying out channel estimation to the baseband digital signal, obtains channel condition information.
The channel estimation method that second baseband chip carries out channel estimation use to the baseband digital signal can be taken
Any channel estimation method.
Wherein, the second baseband chip can be the process chips such as single-chip microcomputer or FPGA.
It should be noted that the concrete structure of transmitting end channel estimation module 42 is not limited to above-mentioned zero intermediate frequency chip
The combination of (i.e. radio frequency-IQ demodulators), A/D converter and the second baseband chip, can also realize channel for other circuits, device
Estimation, will not enumerate herein.
In above-mentioned transmitting terminal, transmitting terminal signal generator module 44 can include：Radiofrequency signal chip, signal modulation circuit and
Power amplification circuit.
The radiofrequency signal chip, what is obtained for being calculated according to first baseband chip meets the non-of the rectifier terminal
The parametric results of many sinusoidal signal waveforms of linear waveform structure, generate original sine ripple.
The signal modulation circuit, for being adjusted to the original sine ripple, generates many sinusoidal radio frequency energy
Signal.
The power amplification circuit, for being amplified to many sinusoidal radio frequency energy signals.
Radiofrequency signal chip can be it is any can produce the chip of satisfactory sine wave signal, including but not limited to
Radio-frequency oscillator, OFDM chips etc..
Signal modulation circuit can change the modulation circuit of radio frequency waveform feature comprising modulation circuit, phase modulation circuit etc..
Power amplification circuit is mainly made up of power amplifier.
Embodiment three
In the present embodiment there is provided a kind of system for lifting rectification efficiency, Fig. 5 is referred to, lift rectification efficiency is
System includes：Rectifier terminal 51 and transmitting terminal 52.
Wherein, rectifier terminal 51 includes：Rectifier terminal array antenna module 511, rectifier terminal rectification circuit module 512 and rectifier terminal
Pilot tone generation module 513.
The concrete structure and correlation function of transmitting terminal 52 refer to the transmitting terminal shown in embodiment two, will not be repeated here.
The rectifier terminal array antenna module 511, for launching pilot signal, and receives many of the transmitting terminal transmitting
Sinusoidal radio frequency energy signal.
The rectifier terminal rectification circuit module 512, DC energy letter is converted to for many sinusoidal radio frequency energy signals
Number.
The rectifier terminal pilot tone generation module 513, for generating the pilot signal.
Wherein, the work interaction schematic diagram between transmitting terminal 52 and rectifier terminal 51 refers to Fig. 6, as shown in fig. 6, rectifier terminal
Pilot tone generation module 513 generates pilot signal, and pilot signal, transmitting terminal array day are launched by rectifier terminal array antenna module 511
Wire module 41 receives pilot signal, and transmitting end channel estimation module 42 obtains channel condition information, transmitting terminal from pilot signal
Waveform Design module 43 utilizes the channel condition information and Waveform Design algorithm, calculates the nonlinear wave for meeting the rectifier terminal
The parametric results of many sinusoidal signal waveforms of shape structure, it is corresponding many that transmitting terminal signal generator module 44 generates the parametric results
Sinusoidal radio frequency energy signal, transmitting terminal array antenna module 41 launches the corresponding many sinusoidal radio frequency energy letters of the parametric results
Number, rectifier terminal array antenna module 511 receives the corresponding many sinusoidal radio frequency energy signals of the parametric results, rectifier terminal rectified current
The corresponding many sinusoidal radio frequency energy signals of the parametric results are converted to DC energy signal by road module 512.
The rectifier terminal array antenna module 511 can with but be not limited to：Micro-strip array antenna unit.
The workflow of micro-strip array antenna unit：Wireless signal in space is converted into high frequency electric；By antenna element
Upper high frequency electric is converted into wireless signal in space.
Rectifier terminal rectification circuit module 512 includes：Rectification circuit, match circuit and output filter
The match circuit, for many sinusoidal radio frequency energy signals to be transferred into the rectification circuit completely
The rectification circuit, for many sinusoidal radio frequency energy signals transmitted through the match circuit to be rectified into direct current energy
Measure signal.
The output filter, the high-frequency signal in signal for filtering out the rectification circuit output, exports described straight
Stream energy signal.
The structure of rectification circuit includes a variety of, such as single Diode series, single diodes in parallel, multiple diode connection in series-parallel combination
Deng including but not limited to said structure, as long as RF energy signal can be converted into direct current signal.
Core rectifying device market uses Schottky diode or metal-oxide-semiconductor mostly in rectification circuit.
Match circuit, it would be desirable to the radiofrequency signal of frequency be transferred to the rectifying device of rear end completely without causing other to damage
Consumption.
Output filter, generally low pass filter, can be, but not limited to low pass filter, as long as direct current signal is defeated
Go out, and the wave filter that other high-frequency signals that rear end can will be influenceed to export are obstructed.
Rectifier terminal pilot tone generation module 513 includes：Single-chip microcomputer, radiofrequency signal produce chip and power amplification circuit.
The single-chip microcomputer, for generating control instruction according to default pilot configuration, and exports the control instruction to described
Radiofrequency signal produces chip.
The default advance burned single-chip microcomputer of pilot configuration.Wherein, it is specially according to Waveform Design algorithm meter to preset pilot configuration
After calculation, the result drawn, i.e., all transmitting antennas are all to launch the corresponding amplitude of sine waves and phase optimization result, i.e., count above
Calculate matrix S and the Φ result in result.
Default pilot configuration can be, but not limited to M sequence, and any signal form for being used to do channel estimation can be made
For pilot signal.
The radiofrequency signal produces chip, for generating pilot signal according to the control instruction.
The power amplification circuit, for the pilot signal to be amplified and exported.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation be all between difference with other embodiment, each embodiment identical similar part mutually referring to.
For device class embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is joined
See the part explanation of embodiment of the method.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include that
A little key elements, but also other key elements including being not expressly set out, or also include be this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there is other identical element in the process including the key element, method, article or equipment.
Detailed Jie has been carried out to method, system and the transmitting terminal of a kind of lifting rectification efficiency provided herein above
Continue, specific case used herein is set forth to the principle and embodiment of the application, the explanation of above example is only
It is to be used to help understand the present processes and its core concept；Simultaneously for those of ordinary skill in the art, according to this Shen
Thought please, be will change in specific embodiments and applications, in summary, and this specification content should not be managed
Solve as the limitation to the application.
Claims (11)
1. a kind of method for lifting rectification efficiency, it is characterised in that applied to transmitting terminal, methods described includes：
Receive the pilot signal of rectifier terminal transmitting；
Channel condition information is obtained from the pilot signal；
Using the channel condition information and Waveform Design algorithm, calculating meets many of the nonlinear waveform structure of the rectifier terminal
The parametric results of sinusoidal signal waveform；
Generate the corresponding many sinusoidal radio frequency energy signals of the parametric results；
The corresponding many sinusoidal radio frequency energy signals of the parametric results are sent to the rectifier terminal, so that the rectifier terminal will be described
The corresponding many sinusoidal radio frequency energy signals of parametric results are converted to DC energy signal.
2. according to the method described in claim 1, it is characterised in that utilize the channel condition information and Waveform Design algorithm,
The parametric results of many sinusoidal signal waveforms for the nonlinear waveform structure for meeting the rectifier terminal are calculated, including：
Utilize relational expression Max iout≈k0+zDC(S, Φ) and the channel condition information, calculating meets described
The parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure of rectifier terminal, wherein,vd(t)
It is diode both end voltage, isFor diode reverse biased saturation current, vtIt is diode threshold voltage, n is diode PN junction reason
Think the factor, y (t) is the reception signal waveform of the rectifier terminal, ioutFor the output current of the rectifier terminal, n0For Taylor expansion
The exponent number of formula, i even represent the even item of i values,Table is RantI/2 power, ε { } be averaging operator or expectation, y (t)i
For y (t) i power, RantFor antenna impedance.
3. a kind of transmitting terminal, it is characterised in that including：Transmitting terminal array antenna module, transmitting end channel estimation module, transmitting terminal
Waveform Design module and transmitting terminal signal generator module；
The transmitting terminal array antenna module, the pilot signal for receiving rectifier terminal transmitting, and send the transmitting terminal letter
Many sinusoidal radio frequency energy signals of number generation module generation, so that the rectifier terminal gives birth to the transmitting terminal signal generator module
Into many sinusoidal radio frequency energy signals be converted to DC energy signal；
The transmitting end channel estimation module, for obtaining channel condition information from the pilot signal；
The transmitting terminal Waveform Design module, for utilizing the channel condition information and Waveform Design algorithm, calculating meets institute
State the parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure of rectifier terminal；
The transmitting terminal signal generator module, for generating the corresponding many sinusoidal radio frequency energy signals of the parametric results.
4. transmitting terminal according to claim 3, it is characterised in that the transmitting terminal Waveform Design module includes：The
One baseband chip, for utilizing relational expression Max iout≈k0+zDC(S, Φ) and the channel condition information, calculates symbol
The parametric results of many sinusoidal signal waveforms of the nonlinear waveform structure of the rectifier terminal are closed, wherein,I=1 ..., ∞, a=vd
(t), vd(t) it is diode both end voltage, isFor diode reverse biased saturation current, vtIt is diode threshold voltage, n is two
Pole pipe PN junction ideal factor, y (t) is the reception signal waveform of the rectifier terminal, ioutFor the output current of the rectifier terminal, n0
For the exponent number of Taylor expansion, i even represent the even item of i values,Table is RantI/2 power, ε { } be averaging operator or
Expect, y (t)iFor y (t) i power, RantFor antenna impedance.
5. transmitting terminal according to claim 4, it is characterised in that the transmitting terminal array antenna module includes：Microstrip array
Array antenna unit.
6. transmitting terminal according to claim 5, it is characterised in that the transmitting end channel estimation module includes：Zero intermediate frequency
Chip, A/D converter and the second baseband chip；
The zero intermediate frequency chip, for the pilot signal to be converted into base-band analog signal；
The A/D converter, for the base-band analog signal to be converted into baseband digital signal；
Second baseband chip, for carrying out channel estimation to the baseband digital signal, obtains channel condition information.
7. transmitting terminal according to claim 6, it is characterised in that the transmitting terminal signal generator module includes：Radio frequency is believed
Number chip, signal modulation circuit and power amplification circuit；
The radiofrequency signal chip, what is obtained for being calculated according to first baseband chip meets the non-linear of the rectifier terminal
The parametric results of many sinusoidal signal waveforms of waveform configuration, generate original sine ripple；
The signal modulation circuit, for being adjusted to the original sine ripple, generates many sinusoidal radio frequency energy signals；
The power amplification circuit, for being amplified to many sinusoidal radio frequency energy signals.
8. a kind of system for lifting rectification efficiency, it is characterised in that including：Rectifier terminal and such as claim 3-7 any one institute
The transmitting terminal stated, the rectifier terminal includes：Rectifier terminal array antenna module, rectifier terminal rectification circuit module and the production of rectifier terminal pilot tone
Raw module；
The rectifier terminal array antenna module, for launching pilot signal, and many sines of the reception transmitting terminal transmitting are penetrated
Frequency energy signal；
The rectifier terminal rectification circuit module, DC energy signal is converted to for many sinusoidal radio frequency energy signals；
The rectifier terminal pilot tone generation module, for generating the pilot signal.
9. system according to claim 8, it is characterised in that the rectifier terminal array antenna module includes：Microstrip array
Antenna element.
10. system according to claim 9, it is characterised in that the rectifier terminal rectification circuit module includes：Rectified current
Road, match circuit and output filter；
The match circuit, for many sinusoidal radio frequency energy signals to be transferred into the rectification circuit completely；
The rectification circuit, for many sinusoidal radio frequency energy signals transmitted through the match circuit to be rectified into DC energy letter
Number；
The output filter, the high-frequency signal in signal for filtering out the rectification circuit output, exports the direct current energy
Measure signal.
11. system according to claim 10, it is characterised in that the rectifier terminal pilot tone generation module includes：Single-chip microcomputer,
Radiofrequency signal produces chip and power amplification circuit；
The single-chip microcomputer, for generating control instruction according to default pilot configuration, and exports the control instruction to the radio frequency
Signal produces chip；
The radiofrequency signal produces chip, for generating pilot signal according to the control instruction；
The power amplification circuit, for the pilot signal to be amplified and exported.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112701807A (en) * | 2020-12-23 | 2021-04-23 | 华南理工大学 | High-efficiency multi-tone signal rectifier capable of realizing wide input power range |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037954A (en) * | 2014-06-12 | 2014-09-10 | 北京智谷睿拓技术服务有限公司 | Wireless energy transmission control method and control device |
| CN104753131A (en) * | 2015-02-16 | 2015-07-01 | 郑州携能通信技术有限公司 | Wireless charging method and system |
| CN105375653A (en) * | 2015-12-25 | 2016-03-02 | 郑州携能通信技术有限公司 | Wireless-charging transmitting device and method |
| US20160075245A1 (en) * | 2014-09-15 | 2016-03-17 | Stmicroelectronics, Inc. | Method and Apparatus for a Wireless Charging System |
-
2016
- 2016-11-04 CN CN201610973128.5A patent/CN107070505B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037954A (en) * | 2014-06-12 | 2014-09-10 | 北京智谷睿拓技术服务有限公司 | Wireless energy transmission control method and control device |
| US20160075245A1 (en) * | 2014-09-15 | 2016-03-17 | Stmicroelectronics, Inc. | Method and Apparatus for a Wireless Charging System |
| CN104753131A (en) * | 2015-02-16 | 2015-07-01 | 郑州携能通信技术有限公司 | Wireless charging method and system |
| CN105375653A (en) * | 2015-12-25 | 2016-03-02 | 郑州携能通信技术有限公司 | Wireless-charging transmitting device and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701807A (en) * | 2020-12-23 | 2021-04-23 | 华南理工大学 | High-efficiency multi-tone signal rectifier capable of realizing wide input power range |
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