CN106788870A - A kind of interference unit and its control method - Google Patents
A kind of interference unit and its control method Download PDFInfo
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- CN106788870A CN106788870A CN201611089844.3A CN201611089844A CN106788870A CN 106788870 A CN106788870 A CN 106788870A CN 201611089844 A CN201611089844 A CN 201611089844A CN 106788870 A CN106788870 A CN 106788870A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
- H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
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Abstract
The invention discloses a kind of interference unit, there is circuit and radiating circuit including receiving circuit, signal processing circuit, interference signal, the signal output part of the receiving circuit is connected with the first signal input part of signal processing circuit, the signal input part that first signal output part of signal processing circuit occurs circuit with interference signal is connected, the signal output part that interference signal occurs circuit is connected with the secondary signal input of signal processing circuit, and the secondary signal output end of signal processing circuit is connected with the signal input part of radiating circuit.The invention also discloses the control method of the interference unit.It can effectively eliminate the interference signal into receiving antenna array, obtain useful detection signal, and send and jamming target communication frequency identical interference signal, form the strong jamming to jamming target, jamming target is set to carry out normal pass, it is thoroughly out of hand, and its circuit structure more simple optimizing.
Description
Technical field
The invention belongs to information perturbation technique field, more particularly to a kind of interference unit and its control method.
Background technology
With continuing to develop for electronic information technology, interference unit is as a kind of active interference source also by more and more utilizations
In technical fields such as information securities, such as in message transmitting procedure, the interference signal that interference unit sends is coupled to the letter of transmission
In number, make non-recipient be difficult to steal real transmission signal, reach the purpose of information transmission security；And for example, interference unit by with
In fields such as radar, unmanned plane and anti-unmanned planes, the purpose such as scouting and interference is realized.
If interference and scouting work simultaneously, the transceiver insulation scouted between reception antenna and interference transmitting antenna is there is
Problem.In interfering process, because the arrangement that operational environment causes interference with system is subject to various limitations, or by airplane jamming
Spacing between the limitation of the platform of machine, dual-mode antenna can not possibly be sufficiently large, interference signal be possible to direct-coupling in space or
Person forms multi-path signal into the reconnaissance receiver of jammer by the transmitting of surrounding closely environmental objects, consequently, it is possible to leading
The light sensibility in practice for then reducing reconnaissance receiver is caused, reconnaissance range is reduced；It is heavy then make jammer internal loopback, formed from
Excitation, it is impossible to detect radar signal.
The method of traditional raising receive-transmit isolation, such as spacing of increase dual-mode antenna, the lateral spoke for reducing dual-mode antenna
Penetrate and increase orthogonal absorbability isolated screen between dual-mode antenna, or directly isolate transceiver part, such as the number of applying for a patent is
CN201510055000.6 patent names are the patent of invention of " one kind forwarding deception formula GPS EVACs and its interference method ",
Directly transceiver part is isolated and coupled together by Transmission system, transceiver insulation problem has both been avoided, remote transmission is solved again
Problem, regeneration time delay cheating interference signal power it is small, be not only difficult to be detected, and can realize far effective interference away from
From.
But, conventional method cannot still meet high request of the chain-wales jammer to isolation, it is therefore desirable to find one
Plant and effectively weaken method of the interference signal on scouting reception system influence, increase jammer receive-transmit isolation is repeating jamming skill
Art is badly in need of the major issue for solving.Meanwhile, traditional interference unit, its circuit structure is complicated, not enough optimization, and interference effect is not
It is good.
The content of the invention
Based on this, regarding to the issue above, it is necessary to propose a kind of interference unit and its control method, can effectively eliminate and fall into
Enter the interference signal in receiving antenna array, obtain useful detection signal, and send dry with jamming target communication frequency identical
Signal is disturbed, the strong jamming to jamming target is formed, jamming target is carried out normal pass, it is thoroughly out of hand, and its electricity
Line structure more simple optimizing.
The technical scheme is that：A kind of interference unit, including receiving circuit, signal processing circuit, interference signal occur
Circuit and radiating circuit, the signal output part of the receiving circuit are connected with the first signal input part of signal processing circuit,
The signal input part that first signal output part of signal processing circuit occurs circuit with interference signal is connected, and interference signal occurs electricity
The signal output part on road is connected with the secondary signal input of signal processing circuit, the secondary signal output end of signal processing circuit
It is connected with the signal input part of radiating circuit.
In the present invention, it is preferable that the signal processing circuit includes being in communication with each other dsp processor and the self adaptation filter of connection
Ripple device；First signal input part of dsp processor is connected with the signal output part of the receiving circuit, and the first of dsp processor
The input that signal output part occurs circuit with the interference signal is connected；First signal input part of sef-adapting filter with it is dry
The output end for disturbing signal generating circuit is connected, and the first signal output part of sef-adapting filter is defeated with the signal of the radiating circuit
Enter end to be connected.
In the present invention, it is preferable that the interference signal occurs circuit to be included noise emission device, frequency mixer and shake harmonic wave certainly
Transmitter, the signal input part of noise emission device is connected with the first signal output part of the dsp processor, noise emission device
Signal output part is connected with the first signal input part of frequency mixer, the signal output part of frequency mixer and the sef-adapting filter
First signal input part is connected, and is connected with the secondary signal input of frequency mixer from the signal output part of concussion harmonic emissions device.
In the present invention, it is preferable that the receiving circuit includes the receiving antenna array, the low pass filter that communicate to connect successively
And converter, the signal output part of converter is connected with the first signal input part of the signal processing circuit.
In the present invention, it is preferable that the radiating circuit includes the radio-frequency power amplifier, the bandpass filtering that communicate to connect successively
Device and interference transmitting antenna, the secondary signal output end of the signal input part of radio-frequency power amplifier and the signal processing circuit
Connection.
The invention also discloses the control method of above-mentioned interference unit, comprise the following steps：
A. the external signal d that receiving circuit real-time reception is arrived is obtained, meanwhile, obtain frequency mixer and produce interference signal, as
With reference to interference signal J, into step b；
B. this is processed with reference to interference signal J through sef-adapting filter, obtains filtered output signals Y, and the filtering is defeated
Go out signal Y to be inversely added in dsp processor with the external signal, obtain filtered output signals Y and external signal d
Between error signal e, into step c；
C. the mean square error E { e of the error signal e are calculated2, and judge mean square error E { e2Whether less than default threshold
Value, if then using filtered output signals Y when being sent to radiating circuit to emission as external interference signals, and by the error
Signal e is used as the useful detection signal in external signal d；Otherwise enter step d；
D. the error signal e is fed back in the middle of sef-adapting filter, and adaptive-filtering is adjusted according to the error signal e
The data processing method of device, return to step b.
In the present invention, it is preferable that the weight vector W in the sef-adapting filter, W=[W are defined as0, W1..., Wj]T,
Wherein, WjIt is the weights of jth root reception antenna on the receiving antenna array, T is the conjugate transposition of weight vector W, and is initialized
Weight vector and iteration convergence step-size factor, following steps are specifically included in the step b：
B1. the reference interference signal J is processed through sef-adapting filter, according to Y=JWWhen previous, WWhen previousRepresent by step
Rapid a is to when the weight vector of previous iteration, obtaining filtered output signals Y, into step b2 during step d circulate operations；
B2. according to e=d-Y, filtered output signals Y is inversely added with external signal d, is obtained the filtering defeated
The error signal e gone out between signal Y and external signal d, into step b3；
B3. according to WNext time=WWhen previous+2μWhen previousE.J, obtains WNext time, during step a to step d circulate operations
The weight vector of next iteration, wherein, μWhen previousFor during step a to step d circulate operations when the iteration convergence of previous iteration
Step-size factor；According to μNext time=α μWhen previous+β·e2, obtain μNext time, as next during step a to step d circulate operations
The iteration convergence step-size factor of secondary iteration, and enter step c, wherein, α and β is parameter preset, and 0 ＜ α ＜ 1, β ＞ 0.
In the present invention, it is preferable that the sef-adapting filter is digital delay sef-adapting filter.
The beneficial effect of the technical program is：
(1) in the prior art, transmitting-receiving transmitting antenna works with reception antenna on miniaturization interference unit simultaneously when every
From problem, by setting sef-adapting filter in interference unit, design uses active digital adaptive canceling technology, using correlation
Principle is offseted, adjustment convergence step-length effectively realizes the convergence rate and convergence stability in adaptive interference cancellation algorithm
It is compromise, finally can effectively eliminate into the interference signal in detecting antenna, obtain useful detection signal；
(2) can send makes to do with jamming target communication frequency identical interference signal, strong jamming of the formation to jamming target
Disturbing target cannot carry out normal pass, thoroughly out of hand, and its circuit structure more simple optimizing；
(3) according to digital delay sef-adapting filter, dynamically adjustment restrains step-length, finally causes the filter of digital delay self adaptation
The output of ripple device approaches said external interference signal through analysis on mean square meaning, including the radar jammer is to emission
Interference signal direct-coupled signal in space, and the signal that the interference signal reflects through environmental objects, and as numeral
Another road input of delayed adaptation wave filter, the input of final digital delay sef-adapting filter is and needs to detect the radar of receipts
Signal, can greatly improve scouting and interference effect；
(4) for coarse delay institute irrealizable time delay, that is, then pass through micro- less than the time of coarse delay precision
Receiving antenna array is adjusted with interference transmitting antenna distance to realize, the distance adjustment of fine adjustment stage is capable of achieving several millimeters of essence
Degree, is capable of achieving the time delay less than nanosecond, substantially increases the precision of time delay, reaches preferably to scout and is imitated with interference
Really.
Brief description of the drawings
Fig. 1 is the theory diagram of interference unit in embodiment；
Description of reference numerals：
10 receiving circuits, 101 receiving antenna arrays, 102 low pass filters, 103 converters, 20 signal transactings
Circuit, 201 dsp processors, 202 sef-adapting filters, 30 interference signals generation circuit, 301 noise emission devices, 302 mix
Frequency device, 303 shake harmonic emissions device, 40 radiating circuits, 401 video power amplifiers, 402 bandpass filters, 403 certainly
Interference transmitting antenna.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with the accompanying drawings.
Embodiment 1
With reference to Fig. 1, a kind of interference unit, including receiving circuit 10, signal processing circuit 20, interference signal occur circuit 30 with
And radiating circuit 40, the signal output part of the receiving circuit 10 is connected with the first signal input part of signal processing circuit 20,
The signal input part that first signal output part of signal processing circuit 20 occurs circuit 30 with interference signal is connected, interference signal hair
The signal output part of raw circuit 30 is connected with the secondary signal input of signal processing circuit 20, and the second of signal processing circuit 20
Signal output part is connected with the signal input part of radiating circuit 40.
In another embodiment, the signal processing circuit 20 include be in communication with each other connection dsp processor 201 and from
Adaptive filter 202；First signal input part of dsp processor 201 is connected with the signal output part of the receiving circuit 10,
The input that first signal output part of dsp processor 201 occurs circuit 30 with the interference signal is connected；Sef-adapting filter
The output end that 202 the first signal input part occurs circuit 30 with interference signal is connected, the first signal of sef-adapting filter 202
Output end is connected with the signal input part of the radiating circuit 40.
In another embodiment, the interference signal occurs circuit 30 includes noise emission device 301, the and of frequency mixer 302
From concussion harmonic emissions device 303, the first signal output of the signal input part of noise emission device 301 and the dsp processor 201
End is connected, and the signal output part of noise emission device 301 is connected with the first signal input part of frequency mixer 302, the letter of frequency mixer 302
Number output end is connected with the first signal input part of the sef-adapting filter 202, and the signal from concussion harmonic emissions device 303 is defeated
Go out end to be connected with the secondary signal input of frequency mixer 302.
In another embodiment, the receiving circuit 10 includes the receiving antenna array 101, low pass for communicating to connect successively
Wave filter 102 and converter 103, the first signal of the signal output part of converter 103 and the signal processing circuit 20
Input is connected.
In another embodiment, the radiating circuit 40 includes the radio-frequency power amplifier 401, band for communicating to connect successively
Bandpass filter 402 and interference transmitting antenna 403, the signal input part of radio-frequency power amplifier 401 and the signal processing circuit
20 secondary signal output end connection.
During work, receiving circuit 10 will be received and the external signal d after processing issues dsp processor 201, afterwards in DSP
Fourier transformation is carried out in processor 201, you can judge the working frequency of jamming target, noise emission device 301 is produced and done
Target operating frequency identical interference signal is disturbed, the waveform signal of frequency richness, warp can be produced from concussion harmonic oscillator 303
Crossing after frequency mixer can cover the frequency range of 40Mhz---1Ghz, the signal after mixing by sef-adapting filter 202 and DSP at
After reason device 201 is adjusted, the useful signal e in external signal d is may recognize that, and can send and jamming target communication frequency identical
Interference signal Y, forms the strong jamming to jamming target, jamming target is carried out normal pass, thoroughly out of hand, and its
Circuit structure more simple optimizing.
The invention also discloses the control method of above-mentioned interference unit, comprise the following steps：
A. the external signal d that receiving circuit real-time reception is arrived is obtained, meanwhile, obtain frequency mixer and produce interference signal, as
With reference to interference signal J, into step b；
B. this is processed with reference to interference signal J through sef-adapting filter, obtains filtered output signals Y, and the filtering is defeated
Go out signal Y to be inversely added in dsp processor with the external signal, obtain filtered output signals Y and external signal d
Between error signal e, into step c；
C. the mean square error E { e of the error signal e are calculated2, and judge mean square error E { e2Whether less than default threshold
Value, if then using filtered output signals Y when being sent to radiating circuit to emission as external interference signals, and by the error
Signal e is used as the useful detection signal in external signal d；Otherwise enter step d；
D. the error signal e is fed back in the middle of sef-adapting filter, and adaptive-filtering is adjusted according to the error signal e
The data processing method of device, return to step b.
In another embodiment, the weight vector W in the sef-adapting filter, is defined as W=[W0, W1..., Wj]T,
Wherein, WjIt is the weights of jth root reception antenna on the receiving antenna array, T is the conjugate transposition of weight vector W, and is initialized
Weight vector and iteration convergence step-size factor, following steps are specifically included in the step b：
B1. the reference interference signal J is processed through sef-adapting filter, according to Y=JWWhen previous, WWhen previousRepresent by step
Rapid a is to when the weight vector of previous iteration, obtaining filtered output signals Y, into step b2 during step d circulate operations；
B2. according to e=d-Y, filtered output signals Y is inversely added with external signal d, is obtained the filtering defeated
The error signal e gone out between signal Y and external signal d, into step b3；
B3. according to WNext time=WWhen previous+2μWhen previousEJ, obtains WNext time, during step a to step d circulate operations
The weight vector of next iteration, wherein, μWhen previousFor during step a to step d circulate operations when the iteration convergence of previous iteration
Step-size factor；According to μNext time=α μWhen previous+β·e2, obtain μNext time, as next during step a to step d circulate operations
The iteration convergence step-size factor of secondary iteration, and enter step c, wherein, α and β is parameter preset, and 0 ＜ α ＜ 1, β ＞ 0.
In another embodiment, the sef-adapting filter is digital delay sef-adapting filter.
In the above method, for the interference cancellation algorithm of adaptive-filtering, the convergence rate of iterative process is there is
And stability problem, wherein convergence rate, the system time of interference cancellation treatment is had influence on, directly decide whether that transmitting-receiving can be accomplished
Carry out simultaneously；And stability is determined by the validity and convergence of interference cancellation algorithm, interference cancellation is directly influenced
Effect.Therefore, typically on the premise of interference cancellation algorithmic statement is ensured, should try one's best from larger iteration convergence step-size factor
μ strengthens the actual application value of adaptive interference cancellation system to improve convergence rate.Meanwhile, also to consider due to step-length because
The excessive Misadjustment noise for causing of son is excessive, so as to reduce the performance of cancellation system.Iteration convergence step-size factor is received by adjusting more
Parameter alpha and β in new formula, reach better trade-off between convergence rate and steady output rate.
Embodiment described above only expresses the specific embodiment of invention, and its description is more specific and detailed, but not
Can therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art,
On the premise of inventive concept is not departed from, various modifications and improvements can be made, these belong to the protection domain of invention.
Claims (8)
1. a kind of interference unit, it is characterised in that：There is circuit and hair including receiving circuit, signal processing circuit, interference signal
Transmit-receive radio road, the signal output part of the receiving circuit is connected with the first signal input part of signal processing circuit, signal transacting electricity
The signal input part that first signal output part on road occurs circuit with interference signal is connected, and the signal that interference signal occurs circuit is defeated
Go out end to be connected with the secondary signal input of signal processing circuit, the secondary signal output end and radiating circuit of signal processing circuit
Signal input part be connected.
2. interference unit according to claim 1, it is characterised in that：The signal processing circuit includes being in communication with each other connection
Dsp processor and sef-adapting filter；First signal input part of dsp processor and the signal output part phase of the receiving circuit
Even, the input that the first signal output part of dsp processor occurs circuit with the interference signal is connected；Sef-adapting filter
The output end that first signal input part and interference signal occur circuit is connected, the first signal output part of sef-adapting filter and institute
The signal input part for stating radiating circuit is connected.
3. interference unit according to claim 2, it is characterised in that：The interference signal occurs circuit includes noise emission
Device, frequency mixer and from concussion harmonic emissions device, the signal input part of noise emission device is defeated with the first signal of the dsp processor
Go out end to be connected, the signal output part of noise emission device is connected with the first signal input part of frequency mixer, the signal output of frequency mixer
End is connected with the first signal input part of the sef-adapting filter, from the signal output part and frequency mixer that shake harmonic emissions device
Secondary signal input be connected.
4. interference unit according to claim 3, it is characterised in that：The receiving circuit includes the reception for communicating to connect successively
Aerial array, low pass filter and converter, the signal output part of converter are believed with the first of the signal processing circuit
The connection of number input.
5. according to any described interference units of claim 1-4, it is characterised in that：The radiating circuit includes communicating to connect successively
Radio-frequency power amplifier, bandpass filter and interference transmitting antenna, the signal input part of radio-frequency power amplifier and the letter
The secondary signal output end connection of number process circuit.
6. a kind of control method of interference unit as claimed in claim 4, it is characterised in that comprise the following steps：
A. the external signal d that receiving circuit real-time reception is arrived is obtained, meanwhile, obtain frequency mixer and produce interference signal, as reference
Interference signal J, into step b；
B. this is processed with reference to interference signal J through sef-adapting filter, obtains filtered output signals Y, and the filtering is exported into letter
Number Y is inversely added with the external signal in dsp processor, is obtained between filtered output signals Y and external signal d
Error signal e, into step c；
C. the mean square error E { e of the error signal e are calculated2, and judge mean square error E { e2Whether predetermined threshold value is less than, if
It is, using filtered output signals Y when being sent to radiating circuit to emission as external interference signals, and by the error signal e
As the useful detection signal in external signal d；Otherwise enter step d；
D. the error signal e is fed back in the middle of sef-adapting filter, and sef-adapting filter is adjusted according to the error signal e
Data processing method, return to step b.
7. the control method of interference unit according to claim 6, it is characterised in that：Weight vector in the sef-adapting filter
W, is defined as W=[W0, W1..., Wj]T, wherein, wjIt is the weights of jth root reception antenna on the receiving antenna array, T is power
The conjugate transposition of vector W, and weight vector and iteration convergence step-size factor are initialized, specifically include following steps in the step b：
B1. the reference interference signal J is processed through sef-adapting filter, according to Y=JWWhen previous, WWhen previousRepresent by step a extremely
When the weight vector of previous iteration during step d circulate operations, filtered output signals Y is obtained, into step b2；
B2. according to e=d-Y, filtered output signals Y is inversely added with external signal d, is obtained filtering output letter
Error signal e number between Y and external signal d, into step b3；
B3. according to WNext time=WWhen previous+2μ is when previousE.J, obtains WNext time, as during step a to step d circulate operations next time
The weight vector of iteration, wherein, μWhen previousFor during step a to step d circulate operations when the iteration convergence step-length system of previous iteration
Number；According to μNext time=α μ work as previous+β e2, obtain μNext time, as being changed during step a to step d circulate operations next time
The iteration convergence step-size factor in generation, and enter step c, wherein, α and β is parameter preset, and 0 ＜ α ＜ 1, β ＞ 0.
8. according to claim 6 or 7 interference unit control method, it is characterised in that：The sef-adapting filter is numeral
Delayed adaptation wave filter.
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| CN108377154A (en) * | 2018-02-05 | 2018-08-07 | 广东欧珀移动通信有限公司 | Harmonic suppression apparatus, harmonic suppressing method and electronic device |
| CN108521315A (en) * | 2018-04-08 | 2018-09-11 | 北京东远润兴科技有限公司 | Interference simulator and data link reliability assist verification system |
| CN111835368A (en) * | 2020-07-31 | 2020-10-27 | 海能达通信股份有限公司 | Zero intermediate frequency receiving system |
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| CN111835368A (en) * | 2020-07-31 | 2020-10-27 | 海能达通信股份有限公司 | Zero intermediate frequency receiving system |
| CN111835368B (en) * | 2020-07-31 | 2022-11-18 | 海能达通信股份有限公司 | Zero intermediate frequency receiving system |
| CN113014355A (en) * | 2020-12-22 | 2021-06-22 | 四川九洲电器集团有限责任公司 | Vehicle-mounted active and passive combined broadband interference system |
| CN113014355B (en) * | 2020-12-22 | 2022-02-01 | 四川九洲电器集团有限责任公司 | Vehicle-mounted active and passive combined broadband interference system |
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