CN106299691A - There is two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function - Google Patents
There is two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/525—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between emitting and receiving antennas
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Abstract
There is two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function, including sampler and interference rejection unit main frame, interference rejection unit main frame includes: the first directional coupler, first order quadrature bridge, first order I road Bipolar attenuator, first order I road correlator, first order Q road Bipolar attenuator, first order Q road correlator, first combiner, second combiner, second directional coupler, first power splitter, second level quadrature bridge, I road, second level Bipolar attenuator, I road, second level correlator, Q road, second level Bipolar attenuator, Q road, second level correlator, 3rd combiner, 4th combiner, 3rd directional coupler, second power splitter.The present invention offsets relative to single-stage has bigger interference suppression ratio, in the case of not reducing frequency spectrum resource utilization rate, and the coupled interference level between suppression place dual-mode antenna altogether, ensure that co-located receiver normally works.
Description
Technical field
The invention belongs to disturb control field, be specifically related to a kind of there is two-stage to offset the co-located coupling of dual-mode antenna of function
Interference rejection unit.
Background technology
Coupled interference between co-located dual-mode antenna is one of common form of electromagnetism interruption.Due to dual-mode antenna place cloth altogether
Putting, the two spacing is little, isolation is low.The transmitting power launching antenna is higher, produces bigger at the nigh reception antenna of meeting
Coupled interference level, affects receiver and normally works, and causes receiver to block and is even burned out.
Interference source is the transmitting antenna in certain radio station, and produced electromagnetic interference is to have the arrowband sine of certain mid frequency
Signal；Disturbed thing is the reception antenna in another radio station,.Antenna (be called for short and launch antenna) is launched in interference can be in disturbed reception
Antenna (abbreviation reception antenna) place produces certain coupled voltages, has two kinds of signal compositions at such reception antenna: useful letter
Number and interference signal, coupled voltages produce disturb signal exactly.Useful signal and interference signal are all arrowband sinusoidal signal, no
Cross the two and there is different mid frequencyes, and mid frequency is not fixed, and therefore can not use the wave filter with preset parameter.
The patent of invention of Publication No. ZL201010198092.0 discloses a kind of ultra-short wave electromagnetic interference cancelling device, should
Device uses single-stage interference cancellation scheme, and coupled interference rejection ability is relatively small, has bigger remaining interference level.
Summary of the invention
The technical problem to be solved in the present invention is, for deficiencies of the prior art, it is provided that one has two-stage
Offset the dual-mode antenna co-located coupled interference restraining device of function, offset relative to single-stage and there is bigger interference suppression ratio,
In the case of not reducing frequency spectrum resource utilization rate, the coupled interference level between suppression place dual-mode antenna altogether, ensure co-located reception
Machine normally works.
The present invention solves that above-mentioned technical problem be the technical scheme is that
There is two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function, fill including sampler and AF panel
Putting main frame, sampler includes input, outfan and three ports of coupled end, and the input of sampler is connected with transmitter, defeated
Go out end and be connected with launching antenna；The input of interference rejection unit main frame is connected with the coupled end of sampler, outfan with connect
Receipts machine is connected；
Described interference rejection unit main frame includes:
First directional coupler, its input connects the coupled end of sampler, and its outfan connects first order quadrature bridge
Input, coupled end connects the input of second level quadrature bridge；
First order quadrature bridge, its four outfans are respectively I road outfan, I road coupled end, Q road outfan and Q road coupling
Close end；
First order I road Bipolar attenuator, its input is connected with the I road outfan of first order quadrature bridge；
First order I road correlator, including I road sampled signal end, I road error signal input and I road computing outfan, I
Road sampled signal end is connected with the I road coupled end of first order quadrature bridge, and computing outfan in I road is bipolar with first order I road to decline
The control end subtracting device is connected；
First order Q road Bipolar attenuator, its input is connected with the Q road outfan of first order quadrature bridge；
First order Q road correlator, including Q road sampled signal end, Q road error signal input and Q road computing outfan, Q
Road sampled signal end is connected with the Q road coupled end of first order quadrature bridge, and computing outfan in Q road is bipolar with first order Q road to decline
The control end subtracting device is connected；
First combiner, two input respectively with first order I road Bipolar attenuator and first order Q road Bipolar attenuator
Outfan be connected；
Second combiner, two input outfan and reception antenna with the first combiner respectively is connected；
Second directional coupler, the outfan of its input and the second combiner couples；
First power splitter, its input connects the second directional coupler coupled end, and two outfan connects first respectively
The I road computing outfan of level I road correlator and the error signal input of first order Q road correlator；
Second level quadrature bridge, its four outfans are respectively I road outfan, I road coupled end, Q road outfan and Q road coupling
Close end；
I road, second level Bipolar attenuator, its input is connected with the I road outfan of second level quadrature bridge；
I road, second level correlator, including sampled signal input, error signal input and computing outfan, sampling letter
Number input is connected with the I road coupled end of second level quadrature bridge, the control of computing outfan and I road, second level Bipolar attenuator
End processed is connected；
Q road, second level Bipolar attenuator, its input is connected with the Q road outfan of second level quadrature bridge；
Q road, second level correlator, including sampled signal input, error signal input and computing outfan, sampling letter
Number input is connected with the Q road coupled end of second level quadrature bridge, the control of computing outfan and Q road, second level Bipolar attenuator
End processed is connected；
3rd combiner, two input respectively with second level I road Bipolar attenuator and Q road, second level Bipolar attenuator
Outfan be connected；
4th combiner, two input respectively with outfan and the output of the second directional coupler of the 3rd combiner
End is connected；
3rd directional coupler, its input connects the 4th combiner outfan, and outfan connects receiver；
Second power splitter, input connects the 3rd directional coupler coupled end, and two outfans connect I road, the second level respectively
Correlator and the error signal input of Q road, second level correlator.
By such scheme, described first order I road Bipolar attenuator includes inputting line transformer, PIN diode electric bridge
With output line transformer；The outside of input line transformer uses common mode configuration, inner side to use differential mode structure, and inner side
With outer coil equal turn numbers；Output line transformer structure is identical with input line transformer；Input transmission line transformation
Device inner coil intermediate input, for controlling end, exports line transformer inner coil middle ground；PIN diode electric bridge is by four
Prop up PIN diode both positive and negative polarity and be sequentially connected with composition.
Described first order Q road Bipolar attenuator, I road, second level Bipolar attenuator, second level Q road Bipolar attenuator and
One-level I road Bipolar attenuator structure is identical.
By such scheme, described first order I road correlator is by four-quadrant analog multiplication circuit, low-pass filter circuit and electricity
Pressure follow circuit is in series；Described first order Q road correlator, I road, second level correlator, second level Q road correlator and
One-level I road correlator configuration is identical.
By such scheme, described four-quadrant analog multiplication circuit uses analog multiplier chip AD835；Described low pass
Filter circuit and voltage follower circuit are made up of integrated transporting discharging chip OP07.
The operation principle of the present invention:
Assume that interference signal equation (1) being coupled on reception antenna because launching the high-power transmitting of antenna represents
Wherein N (t) is interference signal, and A is the normalization amplitude of interference signal, and ω is interference signal angular frequency, φ0It is dry
Disturbing the initial phase of signal, t is the time, AI' for disturbing the normalization amplitude of signal I road component, AQ' for disturbing signal Q road component
Normalization amplitude.In order to offset this interference signal, the present invention samples interference signal from jamming transmitter, and by sampled signal etc.
It is divided into I, Q two-way that phase place is orthogonal, can represent with following equation
XI(t)=sin (ω t)
XQ(t)=cos (ω t)
Wherein I road sampled signal XI(t) and Q road sampled signal XQT the angular frequency of () is identical with interference signal N (t), XI(t)
And XQT the normalization amplitude of () is 1；The weighted sum of two-way sampled signal is denoted as offseting signal C (t), is expressed as
C (t)=AI·XI(t)+AQ·XQ(t) (2)
Wherein AIAnd AQRepresent the weight coefficient of I, Q two-way respectively.Reduced equation (1) and equation (2), it can be seen that equation
(1), (2) the right and left is separately summed and can obtain
N (t)+C (t)=(AI+AI')sin(ωt)+(AQ+AQ')cos(ωt) (3)
According to equation (3), work as AI=-AI' and AQ=-AQ' time, interference signal is 0 with offseting signal sum, i.e. disturbs letter
Number it is cancelled.
From equation (3) it can also be seen that I, Q two-way sampled signal amplitude that only need to control just can reach control and offset simultaneously
Signal amplitude and the effect of phase place, make to offset signal anti-phase with interference signal constant amplitude, it is possible to eliminate the interference in reception antenna
Signal
In the present invention, sampler samples interference signal from jamming transmitter.First order quadrature bridge, first order I road are bipolar
Attenuator, first order Q road Bipolar attenuator are sampled the amplitude of the signal first order and phase place adjusts, be allowed to in reception antenna
Interference signal constant amplitude anti-phase；Error signal is then carried out by first order I road correlator and first order Q road correlator with sampled signal
Correlation operation, operation result controls first order I road, Q road Bipolar attenuator respectively, constitutes negative feedback loop, it is achieved interference letter
Number maximum counteracting.Second level quadrature bridge, I road, second level Bipolar attenuator, Q road, second level Bipolar attenuator take
The amplitude of the sample signal second level and phase place adjust, and eliminate remaining interference signal further；Second level I road correlator and second level Q
Road correlator then carries out correlation operation to error signal and sampled signal, and it is double that operation result controls I road, the second level, Q road respectively
Pole attenuator.
The present invention compared with prior art has the advantages that
1, by the closed-loop vector of jamming transmitter sampled signal is modulated and relevant feedback computing so that it is with coupled interference
Constant amplitude is anti-phase, by signal syntheses and counteracting coupled interference, ensures that co-located receiver normally works；Increase the two poles of the earth interference cancellation newly
Function, can significantly promote co-located coupled interference degree of suppression, promotes interference rejection unit performance indications；
2, the result of first order interference cancellation is incorporated among the interference cancellation circuit of the second level as input, in contrast to
Single-stage interference cancellation can further improve interference suppression ratio.
Accompanying drawing explanation
Fig. 1 is the structured flowchart that the present invention has that two-stage offsets the dual-mode antenna co-located coupled interference restraining device of function.
Detailed description of the invention
Below according to specific embodiment and combine accompanying drawing, the present invention is further detailed explanation.
With reference to shown in Fig. 1, the two-stage that has described in the embodiment of the present invention offsets the co-located coupled interference of dual-mode antenna of function
Restraining device, including sampler and interference rejection unit main frame.
Sampler includes input, outfan and three ports of coupled end, and the input of sampler is connected with transmitter,
Outfan is connected with launching antenna, and coupled end is connected with interference rejection unit main frame；The effect of sampler is from transmitter
The interference signal of the certain energy of middle acquisition, is transported to, among interference rejection unit main frame, carry out amplitude and phse conversion, be allowed to
Interference signal constant amplitude in reception antenna is anti-phase.The degree of coupling of sampler launches power and doing on reception antenna according to transmitter
The ratio disturbing power determines, usual span is 10～20dB.Sampler outfan obtains most of power of input,
Not affecting the normal transmission state of transmitter, interference rejection unit main frame only obtains very small part and launches power.
Interference rejection unit main frame includes:
First directional coupler, its input connects the coupled end of sampler, sampled signal is divided into two-way, its outfan
Connecting the input of first order quadrature bridge, for first order interference cancellation, its coupled end connects the defeated of second level quadrature bridge
Enter end, for second level interference cancellation；
First order quadrature bridge, for being divided into by sampled signal, amplitude is equal, the two-way output signal of quadrature in phase；The
Four outfans of one-level quadrature bridge are respectively I road outfan, I road coupled end, Q road outfan and Q road coupled end；The first order
Employing electric resistance partial pressure between the I road coupled end of quadrature bridge, Q road coupled end and I road outfan, Q road outfan, I road outfan,
Q road outfan is identical with the signal phase of I road coupled end, Q road coupled end, I road coupled end and the degree of coupling phase of Q road coupled end
Deng, about 20dB；
First order I road Bipolar attenuator, its input connects the I road outfan of first order quadrature bridge, for first
The signal of the I road outfan output of level quadrature bridge carries out amplitude fading；First order I road Bipolar attenuator is become by inputting transmission line
Depressor, PIN diode electric bridge and output line transformer composition, input, export line transformer employing balanced-unbalanced
Structure, outside uses common mode, inner side to use differential mode mode, and outside is identical with the coil turn of inner side, PIN diode electric bridge
Being sequentially connected with by four PIN diode D1, D2, D3 and D4 both positive and negative polarities and constitute, PIN diode model is UM4301；When direct current control
During curent change processed, the RF impedance of Bipolar attenuator changes the most therewith, and control electric current diminishes, RF impedance increases, for defeated
The decay entering signal increases, and controls that electric current becomes big, RF impedance reduces, reduces for the decay of input signal；Work as DC control
When current polarity changes, the polarity of output signal also can change accordingly, when DC control current is positive polarity, output
Voltage is also positive polarity, and when DC control current is negative polarity, output voltage is also for negative polarity；
First order I road correlator, including I road sampled signal end, I road error signal input and I road computing outfan；I
Road sampled signal end is connected with the I road coupled end of first order quadrature bridge；I road error signal input and the first power splitter
No. one outfan is connected；Computing outfan in I road is connected with the control end of first order I road Bipolar attenuator, controls first order I
The amplitude fading of road Bipolar attenuator and polarity, constitute negative feedback loop, it is achieved interference signal is farthest offset.The first order
I road correlator includes four-quadrant analog multiplication circuit, low-pass filter circuit and voltage follower circuit three part, to I road sampling letter
Number carry out related operation, and add the error signal of negative feedback loop so that operation result is more accurate；
First order Q road Bipolar attenuator, structure is identical with first order I road Bipolar attenuator, and its input is with the first order just
The Q road outfan of alternating current bridge is connected, and declines for the signal of the Q road outfan output of first order quadrature bridge is carried out amplitude
Subtract；
First order Q road correlator is identical with first order I road correlator configuration, including Q road sampled signal end, Q road error letter
Number input and Q road computing outfan, Q road sampled signal end is connected with the Q road coupled end of first order quadrature bridge, and Q road is transported
Calculation outfan is connected with the control end of first order Q road Bipolar attenuator；
First combiner, two input respectively with first order I road Bipolar attenuator and first order Q road Bipolar attenuator
Outfan be connected；I, Q two-way sampled signal after adjusting through amplitude and polarity synthesizes, and formation offsets
Signal；
Second combiner, two input outfan and reception antenna with the first combiner respectively is connected；For
Reception antenna signal is synthesized with offseting signal, forms error signal, i.e. first order surviving error signal, in error signal
Comprise useful signal composition and remaining interference signal composition two parts；
Second directional coupler, the outfan of its input and the second combiner is connected, first order surviving error signal
Being divided into two-way, a road carries out related operation, and another road is as the input of second level interference cancellation；
First power splitter, the coupled end of its input and the second directional coupler is connected, and error signal is divided into two
Road, two outfans connect the I road computing outfan of first order I road correlator and the error letter of first order Q road correlator respectively
Number input；
Are correlated with in second level quadrature bridge, I road, second level Bipolar attenuator, Q road, second level Bipolar attenuator, I road, the second level
Device, Q road, second level correlator are used for interference cancellation and the correlation operation of the second level, identical with first order structure.
Four-quadrant analog multiplication circuit uses analog multiplier chip AD835 to constitute, to sampled signal XIT () and error are believed
Number E (t) carries out multiplying, as shown in equation (4):
S (t) is useful signal, the dc component of its output voltage contain remaining interference signal amplitude and with sampling
The phase relation information of signal.
The outfan of four-quadrant analog multiplication circuit is connected with the input of low-pass filter circuit, low-pass filter circuit by
Integrated transporting discharging chip OP07 is constituted, for filtering rear the three of high-frequency signal composition in multiplication result, i.e. equation (4) the right
, the most remaining dc component of output signal of such low-pass filter circuit.
The outfan of low-pass filter circuit is connected with the input of voltage follower circuit, and voltage follower circuit is by integrated fortune
Put chip OP07 to constitute, make use of the feature of OP07 high input impedance, low output impedance, strengthen the bringing onto load energy of output signal
Power, it is to avoid influencing each other between output voltage and load circuit.The output signal of low-pass filter circuit i.e. correlation calculating circuit
Output signal.
Obviously, above-described embodiment is only for clearly demonstrating example of the present invention, and not to the present invention
The restriction of embodiment.For those of ordinary skill in the field, can also be made it on the basis of the above description
The change of its multi-form or variation.Here without also cannot all of embodiment be given exhaustive.And these belong to this
What bright spirit was extended out obviously changes or changes among still in protection scope of the present invention.
Claims (5)
1. there is two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function, including sampler and interference rejection unit
Main frame, sampler includes input, outfan and three ports of coupled end, and the input of sampler is connected with transmitter, output
Hold and be connected with transmitting antenna；The input of interference rejection unit main frame is connected with the coupled end of sampler, outfan and reception
Machine is connected, it is characterised in that described interference rejection unit main frame includes:
First directional coupler, its input connects the coupled end of sampler, and its outfan connects the defeated of first order quadrature bridge
Entering end, coupled end connects the input of second level quadrature bridge；
First order quadrature bridge, its four outfans are respectively I road outfan, I road coupled end, Q road outfan and the coupling of Q road
End；
First order I road Bipolar attenuator, its input is connected with the I road outfan of first order quadrature bridge；
First order I road correlator, including I road sampled signal end, I road error signal input and I road computing outfan, I road takes
Sample signal end is connected with the I road coupled end of first order quadrature bridge, I road computing outfan and first order I road Bipolar attenuator
Control end be connected；
First order Q road Bipolar attenuator, its input is connected with the Q road outfan of first order quadrature bridge；
First order Q road correlator, including Q road sampled signal end, Q road error signal input and Q road computing outfan, Q road takes
Sample signal end is connected with the Q road coupled end of first order quadrature bridge, Q road computing outfan and first order Q road Bipolar attenuator
Control end be connected；
First combiner, two input defeated with first order I road Bipolar attenuator and first order Q road Bipolar attenuator respectively
Go out end to be connected；
Second combiner, two input outfan and reception antenna with the first combiner respectively is connected；
Second directional coupler, the outfan of its input and the second combiner couples；
First power splitter, its input connects the second directional coupler coupled end, and two outfan connects first order I road respectively
The I road computing outfan of correlator and the error signal input of first order Q road correlator；
Second level quadrature bridge, its four outfans are respectively I road outfan, I road coupled end, Q road outfan and the coupling of Q road
End；
I road, second level Bipolar attenuator, its input is connected with the I road outfan of second level quadrature bridge；
I road, second level correlator, including sampled signal input, error signal input and computing outfan, sampled signal is defeated
Enter and hold the I road coupled end with second level quadrature bridge to be connected, computing outfan and the control end of I road, second level Bipolar attenuator
It is connected；
Q road, second level Bipolar attenuator, its input is connected with the Q road outfan of second level quadrature bridge；
Q road, second level correlator, including sampled signal input, error signal input and computing outfan, sampled signal is defeated
Enter and hold the Q road coupled end with second level quadrature bridge to be connected, computing outfan and the control end of Q road, second level Bipolar attenuator
It is connected；
3rd combiner, two input defeated with second level I road Bipolar attenuator and Q road, second level Bipolar attenuator respectively
Go out end to be connected；
4th combiner, two input respectively with outfan and the outfan phase of the second directional coupler of the 3rd combiner
Couple；
3rd directional coupler, its input connects the 4th combiner outfan, and outfan connects receiver；
Second power splitter, input connects the 3rd directional coupler coupled end, and two outfans connect I road, the second level respectively and are correlated with
Device and the error signal input of Q road, second level correlator.
The most according to claim 1 have two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function, and it is special
Levying and be, described first order I road Bipolar attenuator includes inputting line transformer, PIN diode electric bridge and output transmission line
Transformator；The outside of input line transformer uses common mode configuration, inner side to use differential mode structure, and inner and outer coil turn
Number is equal；Output line transformer structure is identical with input line transformer；In input line transformer inner coil
Between input for control end, export line transformer inner coil middle ground；PIN diode electric bridge is by four PIN diodes
Both positive and negative polarity is sequentially connected with composition.
The most according to claim 2 have two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function, and it is special
Levy and be, described first order Q road Bipolar attenuator, I road, second level Bipolar attenuator, second level Q road Bipolar attenuator and
One-level I road Bipolar attenuator structure is identical.
The most according to claim 1 have two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function, and it is special
Levying and be, described first order I road correlator is by four-quadrant analog multiplication circuit, low-pass filter circuit and voltage follower circuit string
Connection forms；Described first order Q road correlator, I road, second level correlator, Q road, second level correlator and first order I road correlator
Structure is identical.
The most according to claim 4 have two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function, and it is special
Levying and be, described four-quadrant analog multiplication circuit uses analog multiplier chip AD835；Described low-pass filter circuit and electricity
Pressure follow circuit is made up of integrated transporting discharging chip OP07.
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| CN107659333A (en) * | 2017-09-19 | 2018-02-02 | 中国人民解放军海军工程大学 | The co-located interference cancellation device in multi-section transceiver radio station |
| CN109450569A (en) * | 2018-11-19 | 2019-03-08 | 中国舰船研究设计中心 | A kind of electronic equipment frequency point mutual interference method for quick predicting |
| CN109525279A (en) * | 2018-10-16 | 2019-03-26 | 北京千方科技股份有限公司 | A kind of self-interference cancellation element, frequency read/write and radio-frequency recognition system |
| CN109541559A (en) * | 2018-11-12 | 2019-03-29 | 北京航空航天大学 | A kind of broadband analogue complex correlator real-time calibration method based on PSK technology |
| CN114157387A (en) * | 2021-11-30 | 2022-03-08 | 湖北工业大学 | Adaptive co-location interference cancellation system with auxiliary channel and method |
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