CN108768441A - Carrier wave quickly offsets method, apparatus and storage medium - Google Patents
Carrier wave quickly offsets method, apparatus and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
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Abstract
A kind of carrier wave of present invention offer quickly offsets method and device, wherein described method includes following steps：The initial amplitude for offseting signal is set, offsets the phase of signal according to the scanning adjustment of the first step value in periodic phase, determines that the minimum signal phase that offsets of corresponding composite signal is initial phase；According to determining initial phase, the phase of signal is offseted according to the scanning adjustment of the second step value in the adjacent threshold range of initial phase, and the amplitude of signal is offseted according to the scanning adjustment of third step value, second step value is smaller than first step value, determines that corresponding composite signal minimum offset signal phase and amplitude are final phase and amplitude.The present invention can optimize the effect of noise suppressed in radio frequency identification, improve the speed that carrier wave offsets.
Description
Technical field
Method, apparatus is quickly offseted the present invention relates to technical field of RFID more particularly to a kind of carrier wave and storage is situated between
Matter.
Background technology
Super high frequency radio frequency identification is initiated to order, handed over using the radio frequency identification mode of passive type by radio-frequency identification reader/writer
During mutually, radio-frequency identification reader/writer needs persistently to send continuous carrier to radio frequency recognizing electronic label, is frequency identification electronic
Label provides energy, this, which is just determined, needs to realize radio frequency identification process by way of transmit-receive cofrequency.Since radio frequency identification is read
It writes device sending and receiving end when receiving signal to need to remain and work at the same time, the high-power carrier wave of transmitting terminal will inevitably be let out
Leakage interferes the signal of the radio frequency recognizing electronic label feedback received, influences the performance of radio frequency identification to receiving terminal.
Therefore, how to inhibit the interference that above-mentioned leakage carrier band is come becomes the key for improving radio frequency identification performance, more may be used
Capable mode be by internal circuit generate all the way with leakage carrier wave constant amplitude, reverse phase offset signal and it is offset.But how
Generating the signal that offsets all the way with leakage carrier wave constant amplitude, reverse phase becomes difficult point place, especially requires to offset speed quickly, needs to carry
Go out a kind of simple and fast calculation and determine to constant amplitude, reverse phase to offset signal, to achieve the effect that quickly to offset.
Invention content
The purpose of the present invention is to provide a kind of carrier waves quickly to offset method, apparatus and storage medium, solves existing skill
Super high frequency radio frequency identifies poor anti jamming capability in art, the technical problem for inhibiting efficiency low leakage carrier wave.
In order to solve the above-mentioned technical problem, a kind of carrier wave of the invention quickly offsets method, and signal is offseted according to generation
Composite signal size determination after being offseted with leakage carrier wave offsets effect, and the method specifically comprises the following steps：
The initial amplitude for offseting signal is set, offsets the phase of signal according to the scanning adjustment of the first step value in periodic phase,
Determine that the minimum signal phase that offsets of corresponding composite signal is initial phase；
According to determining initial phase, letter is offseted according to the scanning adjustment of the second step value in the adjacent threshold range of initial phase
Number phase, and offset the amplitude of signal according to the scanning adjustment of third step value, second step value is than first stepping
It is worth small, determines that corresponding composite signal minimum offset signal phase and amplitude are final phase and amplitude.
Further improvements in methods are quickly offseted as the above-mentioned carrier wave of the present invention, the generation for offseting signal is controlled by the roads I
Component and Q processed road control component realize adjustment, according to scanning adjustment offset signal amplitude and phase is calculated by the following formula
The corresponding roads I control component and the roads Q control component：
Vic=Acosθ,Vqc=Asinθ
Wherein, Vic is that the roads I control component, and Vqc is that the roads Q control component, and A is the signal amplitude that offsets of corresponding adjustment, and θ is to correspond to
Adjustment offsets signal phase.
Quickly offset further improvements in methods as the above-mentioned carrier wave of the present invention, the initial amplitude for offseting signal according to
Following formula calculates：
Wherein, A is the initial amplitude for offseting signal, and Vimax is that control generates and offsets signal and correspond to maximum I in adjusting range
Road controls component, and Vqmax is that control generates and offsets signal and corresponds to maximum roads Q control component in adjusting range.
Further improvements in methods are quickly offseted as the above-mentioned carrier wave of the present invention, first step value is periodic phase pair
The numerical value for answering decile to determine.
Further improvements in methods are quickly offseted as the above-mentioned carrier wave of the present invention, first step value is specially 360 degree
10 degree determined after 36 deciles, second step value are 1 degree.
Further improvements in methods are quickly offseted as the above-mentioned carrier wave of the present invention, the threshold range is first stepping
The range of value restriction, specifically scanning adjusts the phase for offseting signal within the scope of θ i- θ s to θ i+ θ s, wherein θ i are the first of determination
Beginning phase, θ s are the first step value.
Further improvements in methods are quickly offseted as the above-mentioned carrier wave of the present invention, the third step value is according to following formula
It calculates：
As=
Wherein, As is third step value, and Vimax is that control is generated to offset signal and corresponds to maximum roads I and controlled in adjusting range
Component, Vqmax are that control generates to offset signal and corresponds to maximum roads Q and controls component in adjusting range, n for decile quantity.
Further improvements in methods are quickly offseted as the above-mentioned carrier wave of the present invention, the composite signal size is composite signal
The quadratic sum of the roads I voltage value and the roads Q voltage value after quadrature demodulation.
In order to solve the above-mentioned technical problem, the quick compensation device of a kind of carrier wave of the invention, including cancellation circuit unit and
Control unit is offseted, the cancellation circuit unit output offsets signal and leaks the composite signal after carrier wave offsets, described to offset
Control unit is adjusted according to composite signal size, specific the step of executing any of the above-described the method.
In order to solve the above-mentioned technical problem, a kind of computer readable storage medium of the invention, is stored thereon with computer
Program, when the computer program is executed by processor the step of realization any of the above-described the method.
Compared with prior art, the present invention quickly determined by way of first coarse adjustment again fine tuning with leakage carrier wave constant amplitude,
Reverse phase offsets signal, and coarse adjustment mainly determines the direction of adjusting by the way of orientation adjustment phase, is then swept in smaller
It retouches determination in range and suitably offsets signal.The present invention can optimize the effect of noise suppressed in radio frequency identification, improve carrier wave pair
The speed to disappear.
After the detailed description of embodiment of the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more
Add clear.
Description of the drawings
In order to illustrate more clearly of embodiment of the present invention or the technical solution of the prior art, below will to embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it is therefore apparent that the accompanying drawings in the following description is only this
Some embodiments described in invention, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is that carrier wave quickly offsets method flow diagram in an embodiment of the present invention.
Fig. 2 is that carrier wave offsets realization module diagram in an embodiment of the present invention.
Fig. 3 is that corresponding signal corresponds to schematic diagram in polar coordinate system in an embodiment of the present invention.
Specific implementation mode
Hereinafter, the present invention will be described in detail with reference to various embodiments shown in the accompanying drawings.But these embodiments are not
The limitation present invention, structure that those skilled in the art are made according to these embodiments, method or change functionally
It changes and is included within the scope of protection of the present invention.
It should be noted that in various embodiments, identical label or label may be used, but these not generations
Absolute contact relationship in table structure or function.Also, also not generation such as " first " that is previously mentioned in each embodiment, " second "
Absolute differentiation relationship in table structure or function, these are merely for convenience of description.
As shown in Figure 1, carrier wave quickly offsets method flow diagram in an embodiment of the present invention.The purpose that carrier wave offsets is logical
Cross generation offset all the way signal with leak carrier wave synthesized, leakage carrier cancellation is fallen.And if necessary to leakage carrier wave
It is completely counterbalanced by, it is necessary to which generation offsets signal and leakage carrier wave constant amplitude, reverse phase, in embodiments of the present invention, cannot
Directly detect leakage carrier wave amplitude, phase when, by offset signal with leak carrier wave offset after as a result, i.e. export
The size of composite signal offsets whether signal reaches corresponding amplitude and phase to determine, when composite signal is zero, illustrates to leak
Carrier wave has been completely counterbalanced by, offset at this time signal necessarily with leakage carrier wave constant amplitude, the radiofrequency signal of reverse phase.Synthesis is believed
Number analysis can be judged by the quadratic sum of the roads I voltage value after quadrature demodulation and the roads Q voltage value.As shown in Fig. 2, this hair
Carrier wave offsets realization module diagram in a bright embodiment, includes control module 10, IQ generation moulds by the way of closed loop
Block 20 offsets modulation module 30, offsets module 40, quadrature demodulation unit 50, is let out due to that directly need not determine to be completely counterbalanced by
Carrier leakage offsets signal, can constantly adjust the amplitude and phase that offset signal by the feedback of closed loop, therefore realize
It is more reliable and more stable.Offset module 40 for receive offset signal and leakage signal, synthesized and form the synthesis after offseting
Signal, output to quadrature demodulation unit 50, when offset signal just with leakage carrier wave constant amplitude, reverse phase, then it is just zero to export.It is right
The module that disappears 40 can be directional coupler in actual circuit, received by corresponding coupled relation and corresponding offset signal
And leakage carrier wave.Offset modulation module 30 be for generating the module for offseting signal, can be realized by interlock circuit it is anti-
Adjustment circuit is penetrated, two control signal mouths are included at least, I road components and the roads Q component is controlled respectively, offsets modulation module 30 and connect
The signal source to be adjusted received can be the carrier signal of coupling, can also be the local oscillator letter of the corresponding frequency band of local oscillator unit output
Number.Quadrature demodulation unit 50 is then to carry out quadrature demodulation to composite signal to be divided into IQ two-way, for 10 feedback analysis of control module, tool
Body, control module 10 obtains corresponding voltage value by analog-digital converter, by calculating I road voltage values and the roads Q voltage value
Quadratic sum determines the size of composite signal, can be by multiplying accordingly in control module 10 is the embodiment that FPGA is realized
Musical instruments used in a Buddhist or Taoist mass and adder are realized.Control module 10 then connects between the forward circuit being in closed circuit and return circuit, for controlling
System analysis, can be realized by devices such as processors, but compared to instruction set control device, the FPGA speeds of service faster, more
The adjustment for adding suitable carrier wave to offset.In the present embodiment, based on adjustment algorithm be directly against the phase for offseting signal and
Amplitude, therefore in order to coordinate the input control for offseting modulation module 30, it is also necessary to output is converted by IQ generation modules 20 and is corresponded to
The roads I control component, the roads Q control component, IQ generation modules 20 can be dedicated chip, can also be to be integrated in control module
Computing module etc. in 10 can be corresponding mathematical operation function in certain corresponding control programs.It specifically can basis
Adjustment offset signal amplitude and phase is calculated by the following formula the corresponding roads I control component and the roads Q control component：
Vic=Acos θ, Vqc=Asin θ
Wherein, Vic is that the roads I control component, and Vqc is that the roads Q control component, and A is the signal amplitude that offsets of corresponding adjustment, and θ is to correspond to
Adjustment offsets signal phase, can offset signal amplitude, phase by what is adjusted and controls component, Q to obtain corresponding roads I
Road controls component.The process of triangular transformation can be to the sine value and cosine value of each angle in a more specific embodiment,
It establishes and shows look-up table, realize and calculated according to the corresponding numerical value of corresponding phase angle lookup and the modes such as combination multiplier
Journey.
In embodiments of the present invention, carrier wave quickly offsets method according to the feedback of composite signal size, constantly adjusts
The amplitude and phase for offseting signal, specifically comprise the following steps：
Step S10, setting offsets the initial amplitude of signal, and signal is offseted according to the scanning adjustment of the first step value in periodic phase
Phase, determine that the minimum signal phase that offsets of corresponding composite signal is initial phase.It is single by the fixed amplitude for offseting signal
Solely adjustment offsets the phase of signal, it is possible to reduce the complexity of adjustment, the phase for offseting signal are scanned between 0-360 degree
Adjustment.The initial amplitude for offseting signal is calculated advantageously according to following formula：
Wherein, A is the initial amplitude for offseting signal, and Vimax is that control generates and offsets signal and correspond to maximum I in adjusting range
Road controls component, and Vqmax is that control generates and offsets signal and corresponds to maximum roads Q control component in adjusting range.As described above,
The input control for offseting modulation module 30 in Fig. 2 is provided by control module 10 and IQ generation modules 20, specifically by counting
Mode converter exports corresponding voltage range, but since there are certain accuracy ratings for digital analog converter, so determining that the roads I are controlled
Component processed, there is also adjusting ranges for the roads Q control component, and offset modulation module 30 be also generated in adjusting range it is corresponding
Offset signal, and the initial amplitude of above-mentioned determination is that all producible to offset amplitude in signal intermediate therefore corresponding
Offset signal and leak composite signal that carrier wave is formed also more suitable for the adjustment in later stage, be unlikely to occur extreme to offset feelings
Condition.
As shown in figure 3, corresponding radiofrequency signal is indicated by polar coordinate system, to be more prone to illustrate scanning adjustment
Process, the wire length A that the amplitude of radiofrequency signal is drawn by origin are determined, and the angle theta of line and x-axis indicates radiofrequency signal
Phase preferably offsets signal Sf in the position with leakage carrier wave Sl point-symmetrically, due in reality for leaking carrier wave Sl
It is the amplitude and phase for not knowing leakage carrier wave Sl during the adjustment on border, it is therefore desirable to be scanned and seek between 0-360 degree
It looks for, the size by analyzing composite signal offsets signal to determine whether to find corresponding ideal.In embodiments of the present invention,
During preliminary scan, the direction of scanning need to be only determined, so according to specific first step value to offseting signal accordingly
Corresponding approach analysis is carried out, several phasescan angles can be divided by 360 degree.As shown in figure 3, being carried out to 360 degree
12 deciles are 30 degree according to the first step value and scan since zero degree, be scanned respectively to 0,30,60 degree etc. that determination is each
Adjustment phase place is corresponding to offset the case where signal is offseted with leakage carrier wave, but in a preferred embodiment, can be according to angle
36 deciles are carried out, the first step value is correspondingly 10 degree, and corresponding adjustment offsets signal phase, and wherein i indicates scanning adjustment
Number.In the embodiment of fig. 3, by analysis, when phase is 210 degree, composite signal after offseting is minimum, therefore can be with
Determination initially offsets signal Si, and 210 degree are then the initial phases for initially offseting signal Si, can also judge preferably to offset
Signal Sf is necessarily offseted initially near signal Si.In a particular embodiment, how to judge composite signal minimum, it can be with
One memory space is set, it is corresponding right by updating the value of composite signal minimum and label in the current time of storage scanning always
Disappear signal phase, by taking the scanning since zero degree as an example, when determining the corresponding composite signal size of zero phase, by corresponding conjunction
Be stored in memory space at signal magnitude and mark it is corresponding offset signal phase, often adjust phase offsets signal,
The size stored in new composite signal size and memory space is analyzed, when composite signal is big more than being stored in memory space
It is small, with regard to the content stored in reserved storage space, when composite signal is less than the size stored in memory space, just new synthesis
Signal magnitude replaces the content stored in memory space, and re-flag it is corresponding offset signal new phase, when scanned
After, the phase marked in memory space can be determined as initial phase, determine corresponding composite signal in step S20 as follows
Minimum can also and so on use similar method.In more embodiments, usually passed successively from zero degree according to phase
During increasing scanning, it can be found that the size of corresponding composite signal can be undergone from big to small, then process from small to large, because
This, can find that the pole of composite signal variation can stop scanning, and directly offset letter by smallest point is corresponding by judgement
Number phase is as initial phase, it is not necessary to complete remaining phasescan, can further save sweep time in this way.
Step S20, it according to determining initial phase, is swept according to the second step value in the adjacent threshold range of initial phase
The phase that adjustment offsets signal is retouched, and offsets the amplitude of signal, the second step value ratio according to the scanning adjustment of third step value
First step value is small, determines that corresponding composite signal minimum offset signal phase and amplitude are final phase and amplitude.Such as
It is upper described, in figure 3 also it is seen that, it is determined that after the initial initial phase for offseting signal Si, it finds that ideal right
The signal Sf that disappears just is offseted initially near signal Si, can be by adjusting the angle and amplitude of very little, so that it may with scanning to reason
That thinks offsets the position of signal Sf, therefore step S20 does further fine tuning relative to step S10.Due to being adjusted in actual scanning
During whole, after initial phase is determined, preferably signal Sf is offseted to approach, in this case it is not apparent that phase is along the inverse time
Needle adjustment still can reach along adjustment clockwise, and adjustment how many angle, it is therefore desirable in the adjacent threshold of initial phase
The phase of signal is offseted within the scope of value according to the scanning adjustment of the second step value, it is preferable that threshold range limits for the first step value
Range, specifically scanning adjustment offsets the phase of signal within the scope of θ i- θ s to θ i+ θ s, wherein θ i are determining initial phase
Position, θ s are the first step value.By taking Fig. 3 as an example, 210 degree are initial phase, then just in 180 degree to carrying out more between 240 degree
Subtle phasescan can further carry out decile in its phase range at this time, it is preferable that 20 deciles of realization, i.e., second
Step value is 1 degree, therefore the second step value is smaller than the first step value, and can scan cannot scan so in step slo
The point arrived.Similarly, the amplitude for offseting signal is also finely adjusted, and the amplitude of signal is offseted according to the scanning adjustment of third step value, by
In the amplitude for offseting signal, wherein Vic is that the roads I control component, and Vqc is the roads Q control component, therefore same
The limitation for the range that is adjusted, therefore with maximum adjustment amplitude, wherein Vimax is in adjusting range
Interior control generation offsets signal and corresponds to the maximum roads I control component, and Vqmax is that control generation offsets signal pair in adjusting range
Answer the maximum roads Q control component.Therefore offseting the amplitude adjustment of signal can arrive 0Between carry out etc.
Point, specific third step value As=, wherein n is the quantity of decile, it is preferable that n 50 is correspondingly swept
That retouches adjustment offsets signal amplitude, the step number that k is used to indicate to scan adjustment,
Step-scan mode can be started to step up from amplitude for 0, Huo ZhecongGradually reduce, or from point
It is not stepped up and gradually reduces.
In step S20, is adjusted in the adjacent threshold range of initial phase and offset the corresponding phase of signal and amplitude, it can
It is constant by first scanning phase again in a manner of sweep amplitude, i.e., first to keep offseting signal amplitude, phase is directly finely tuned, according to conjunction
Optimal phase is determined at the size of signal, then in the case of optimal phase invariant, scan and adjust according to third step value
The amplitude for offseting signal determines optimal amplitude according to the size of composite signal, and phase optimal at this time and optimal amplitude are
Preferably to offset the phase and amplitude of signal Sf.And in more embodiments, in conjunction with above-mentioned phase and amplitude etc.
Point mode carries out two-dimensional scan mode, and optimal phase and optimal amplitude are disposably determined according to the size of composite signal.It is logical
Cross aforesaid way determine corresponding composite signal it is minimum offset signal phase and amplitude is final phase and amplitude, composite signal
Minimum value determines the mode for being referred to above-mentioned setting memory space, is offseted using final phase and the amplitude generation of above-mentioned determination
Signal is offseted with leakage carrier wave, so that it may which well to curb leakage carrier wave, while above-mentioned algorithm is due to simple and fast, entirely
The realization of cancellation process can be very fast.
In an embodiment of the present invention, the quick compensation device of carrier wave includes cancellation circuit unit and offsets control unit,
The output of cancellation circuit unit offsets signal and is believed according to synthesis with the composite signal after carrier wave offsets, the control unit that offsets is leaked
Number size is adjusted.As shown in Fig. 2, in specific circuit composition, cancellation circuit unit may include offseting modulation module
30, module 40, quadrature demodulation unit 50 are offseted, cancellation circuit unit receives the roads I, control component generation in the roads Q offsets letter accordingly
It number is offseted with leakage carrier wave, is obtained pair to which the composite signal of formation by quadrature demodulation unit 50 accordingly demodulate
The roads I answered, the roads Q voltage, so as to analyze the size of composite signal, and offset control unit may include control module 10 and
IQ generation modules 20, it can be the chip for realizing certain operation control, may further be the hardware programmables device such as FPGA,
In offseting control unit, the process that above-mentioned carrier wave quickly offsets method is executed, being specifically referred to carrier wave quickly offsets method
Embodiment.
In more embodiments, the device of instruction set programming can also be used by offseting control unit, can specifically be wrapped
It includes memory and processor forms basic computer composed structure, memory is computer readable storage medium, is stored with
Above-mentioned carrier wave quickly offsets the computer program of method related procedure, and processor can be by calling correlation computer in memory
Program executes relevant operation.
In conjunction with method and technology scheme disclosed in the present application, hardware can be embodied directly in, executed by control unit it is soft
Part module or the two combination, i.e. one or more steps and/or one or more steps combination, both can correspond to computer journey
Each software module of sequence flow can also correspond to each hardware module, such as ASIC（Application Specific
Integrated Circuit, application-specific integrated circuit）,FPGA（Field-Programmable Gate Array, scene can compile
Journey gate array）Or other programmable logic device, discrete gate or transistor logic, discrete hardware components or it is arbitrary suitable
Work as combination.For convenience of description, it is divided into various modules with function when description above-mentioned apparatus to describe respectively, certainly, is implementing this
The function of each module is realized can in the same or multiple software and or hardware when application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It is realized by the mode of software plus required general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be expressed in the form of software products.The software is by microcontroller list
Member executes, and depends on required configuration, may include any kind of one or more micro-control units, including but not limited to
Micro-control unit, microcontroller, DSP（Digital Signal Processor, Digital Signals unit）Or its arbitrary group
It closes.The software is stored in memory, for example, volatile memory（Such as random-access memory etc.）, nonvolatile memory
（For example, read-only memory, flash memory etc.）Or its arbitrary combination.
In conclusion the present invention is quickly determined and leakage carrier wave constant amplitude, reverse phase by way of first coarse adjustment again fine tuning
Offset signal, coarse adjustment mainly determines the direction of adjusting by the way of orientation adjustment phase, then in smaller scanning range
Interior determination suitably offsets signal.The present invention can optimize the effect of noise suppressed in radio frequency identification, improve the speed that carrier wave offsets
Degree.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiment of understanding.
The series of detailed descriptions listed above only for the present invention feasible embodiment specifically
Bright, they are all without departing from equivalent implementations made by technical spirit of the present invention not to limit the scope of the invention
Or change should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of carrier wave quickly offsets method, which is characterized in that offset the conjunction after signal is offseted with leakage carrier wave according to generation
Effect is offseted at signal magnitude determination, the method specifically comprises the following steps：
The initial amplitude for offseting signal is set, offsets the phase of signal according to the scanning adjustment of the first step value in periodic phase,
Determine that the minimum signal phase that offsets of corresponding composite signal is initial phase；
According to determining initial phase, letter is offseted according to the scanning adjustment of the second step value in the adjacent threshold range of initial phase
Number phase, and offset the amplitude of signal according to the scanning adjustment of third step value, second step value is than first stepping
It is worth small, determines that corresponding composite signal minimum offset signal phase and amplitude are final phase and amplitude.
2. carrier wave according to claim 1 quickly offsets method, which is characterized in that the generation for offseting signal is by the roads I
It controls component and the roads Q control component realizes adjustment, following formula meter is passed through according to offset signal amplitude and the phase of scanning adjustment
Calculate the corresponding roads I control component and the roads Q control component：
Vic=Acos θ, Vqc=Asin θ
Wherein, Vic is that the roads I control component, and Vqc is that the roads Q control component, and A is the signal amplitude that offsets of corresponding adjustment, and θ is to correspond to
Adjustment offsets signal phase.
3. carrier wave according to claim 1 quickly offsets method, which is characterized in that the initial amplitude root for offseting signal
It is calculated according to following formula：
Wherein, A is the initial amplitude for offseting signal, and Vimax is that control generates and offsets signal and correspond to maximum I in adjusting range
Road controls component, and Vqmax is that control generates and offsets signal and corresponds to maximum roads Q control component in adjusting range.
4. carrier wave according to claim 1 quickly offsets method, which is characterized in that first step value is periodic phase
Corresponding etc. point of determining numerical value.
5. carrier wave according to claim 4 quickly offsets method, which is characterized in that first step value is specially 360
10 degree determined after 36 deciles are spent, second step value is 1 degree.
6. carrier wave according to claim 1 quickly offsets method, which is characterized in that the threshold range is the first step
The range limited into value, specifically scanning adjusts the phase for offseting signal within the scope of θ i- θ s to θ i+ θ s, wherein θ i are determining
Initial phase, θ s are the first step value.
7. carrier wave according to claim 1 quickly offsets method, which is characterized in that the third step value is according to following public affairs
Formula calculates：
As=
Wherein, As is third step value, and Vimax is that control is generated to offset signal and corresponds to maximum roads I and controlled in adjusting range
Component, Vqmax are that control generates to offset signal and corresponds to maximum roads Q and controls component in adjusting range, n for decile quantity.
8. carrier wave according to claim 1 quickly offsets method, which is characterized in that the composite signal size is that synthesis is believed
The quadratic sum of the roads I voltage value and the roads Q voltage value after number quadrature demodulation.
9. a kind of quick compensation device of carrier wave, which is characterized in that including cancellation circuit unit and control unit is offseted, it is described to offset
Circuit unit output offsets signal and leaks the composite signal after carrier wave offsets, and described to offset control unit big according to composite signal
It is small to be adjusted, the step of specific perform claim requires any one of 1-8 the methods.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of any one of claim 1-8 the methods are realized when being executed by processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810373502.7A CN108768441B (en) | 2018-04-24 | 2018-04-24 | Carrier wave rapid cancellation method, device and storage medium |
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| CN102915454A (en) * | 2012-10-23 | 2013-02-06 | 深圳市华士精成科技有限公司 | Counteracting method and counteracting circuit for carrier wave of ultrahigh-frequency radio frequency identification device (RFID) reader-writer |
| CN106230472A (en) * | 2016-08-03 | 2016-12-14 | 江苏本能科技有限公司 | Radio-frequency carrier offsets processing method and processing device |
| CN107425877A (en) * | 2017-06-23 | 2017-12-01 | 江苏本能科技有限公司 | Radio-frequency carrier offsets method and system |
| CN107749769A (en) * | 2017-10-30 | 2018-03-02 | 武汉万集信息技术有限公司 | A kind of Fast carrier offsets method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102915454A (en) * | 2012-10-23 | 2013-02-06 | 深圳市华士精成科技有限公司 | Counteracting method and counteracting circuit for carrier wave of ultrahigh-frequency radio frequency identification device (RFID) reader-writer |
| CN106230472A (en) * | 2016-08-03 | 2016-12-14 | 江苏本能科技有限公司 | Radio-frequency carrier offsets processing method and processing device |
| CN107425877A (en) * | 2017-06-23 | 2017-12-01 | 江苏本能科技有限公司 | Radio-frequency carrier offsets method and system |
| CN107749769A (en) * | 2017-10-30 | 2018-03-02 | 武汉万集信息技术有限公司 | A kind of Fast carrier offsets method and device |
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