CN110266427A - A kind of low latitude unmanned plane cluster interference method - Google Patents
A kind of low latitude unmanned plane cluster interference method Download PDFInfo
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- CN110266427A CN110266427A CN201810202153.2A CN201810202153A CN110266427A CN 110266427 A CN110266427 A CN 110266427A CN 201810202153 A CN201810202153 A CN 201810202153A CN 110266427 A CN110266427 A CN 110266427A
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- unmanned plane
- interference
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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
- H04K3/45—Jamming having variable characteristics characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/62—Jamming involving special techniques by exposing communication, processing or storing systems to electromagnetic wave radiation, e.g. causing disturbance, disruption or damage of electronic circuits, or causing external injection of faults in the information
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Abstract
The present invention relates to a kind of low latitude unmanned plane cluster interference methods, pass through frequency hopping tracking technique, emit small-power narrow-band interference signal when UAV targets' remote controler emits signal, and the frequency hopping rule of more remote controlers can be tracked simultaneously, to realize more UAV targets while interfere.Low latitude unmanned plane interference method of the invention has the technical effect accurately interfered UAV targets/unmanned plane cluster.In addition, the technical program also has transmission power small, on ambient enviroment and organism without influence；Narrowband interference, it is noiseless to non-targeted equipment；To ambient enviroment, for example, the low dependence of rain and snow weather, lighting condition；It is easy to operate, can unattended operation the features such as.
Description
Technical field
The present invention relates to unmanned plane defence fields to be specifically related to low latitude unmanned plane interference method.
Background technique
A few days ago, there is explosive development in low altitude small target unmanned plane industry, such more and more unmanned plane are applied
Not only include valid application in various scenes, for example, it is legal take photo by plane, express delivery delivery etc., also include illegal application, for example, take on the sly,
Throw illegal object etc..Since the acquisition of unmanned plane is relatively easy and cheap, nobody is can be used in more and more people
Machine.It, only can not control well with legal means in some sensitizing ranges, such as gymnasium, airport, government's compound place
Unmanned plane.Therefore, it is necessary to professional equipments to unmanned aerial vehicle control, for example, one panel region of protection is not invaded by unmanned plane.
Currently, anti-unmanned air vehicle technique is broadly divided into three classes: 1) directly destroying class, including use laser weapon, use unmanned plane
Break through unmanned plane, fire attack etc.；2) interference blocks class, is mainly realized by technologies such as signal interference, sound wave interference；3) it monitors
Class is controlled, is mainly realized by modes such as radio abduction.Wherein the 1st class is mainly used in military field, and civil field is main
Use the 2nd, 3 class technologies.For example, emitting high-power interference signal to UAV targets, its own control signal is suppressed,
Unmanned plane is forced voluntarily to land or make a return voyage, such as U.S.'s Battelle DroneDefender electron gun；From terrestrial transmitters to mesh
The sufficiently large false GPS location coordinate of unmanned plane strength of transmitted signals is marked, so that UAV targets be induced to fly to wrong ground
Point；By to UAV targets send special frequency channel control signal, cover the signal of real remote controler, thus obtain target without
Man-machine control.
Anti- UAV system based on high-power interference is most widely used, sends out especially by signal interference rifle to unmanned plane
High-power interference signal is penetrated, the communication link of unmanned plane and remote controler is blocked, to force-land or compel to return unmanned plane.
A kind of array device and complete is described in Chinese patent application CN107094062A disclosed on August 25th, 2017
Airspace unmanned plane directional jamming system comprising bay number is the array device of N, and full airspace unmanned plane orientation is done
System is disturbed, wherein Radio Frequency Interfere is emitted to front target airspace, the antenna list by antenna element by interference system
Member is the helical antenna of different frequency range；The interference system further includes interference generation module, radio-frequency channel module, signal amplification mould
Block and battery module；Wherein, interference generation module is for generating one group of broadband swept-frequency signal；Radio-frequency channel module, being used for will
Broadband signal function described in one group is divided into N group Radio Frequency Interfere, and matches a radio-frequency channel for every group of interference signal.When work,
The UAV targets elevation angle and azimuth identified according to anti-unmanned plane detection system control this elevation angle and azimuth are corresponding penetrates
Frequency channel switch, so that the radio-frequency channel energization ON operation of only corresponding angle, other channels are closed, it is ensured that only target
There is the appearance of telemetering interference signal in angle where unmanned plane；If there is multiple unmanned plane targets, then according to multiple targets
Angle controls corresponding multiple radio-frequency channel work, it can be achieved that carrying out to all unmanned plane targets in antenna array covering airspace distant
Signal link interference is controlled, unmanned plane original place is forced to land or make a return voyage；After the landing of unmanned plane original place or disappearance of making a return voyage, closing is penetrated
Frequency channel, no longer transmitting Radio Frequency Interfere.But the interference method specific aim is not good enough, function divide radio frequency can not according to target nobody
Set remote-controller signal frequency adjusts in real time, and function point causes energy loss, noise bigger, and wherein to the power of interference signal
It does not refer to and does not know its influence to ambient enviroment and organism.
In the prior art, high-power jamming equipment there are the problem of mainly have: 1) transmission power is big, commonly reach 50W with
On, sightless injury can be caused to organism；And power causes greatly equipment short cruise duration, generally within a few hours；2) it sends out
Radio frequency spectrum width, such as 2400~2500MHZ ISM band are completely disturbed, cause civilian WIFI, bluetooth and Medical Devices failure
However, takeoff and landing or Medical Instruments operation will be impacted if being used for airport or hospital, it is serious to lead to great peace
Full accident；Meanwhile emission spectrum is wide, can not selectively attack unmanned plane, that is, due to being wideband interferer signal, covers at it
Unmanned plane in cover area can be interfered by it, can not establish white list system；3) manual operation, pointing accuracy requirement are needed
Height, signal interference rifle generally use directional aerial emit interference signal, need manually to be aimed at, to pointing accuracy require compared with
Height, operation difficulty are big；4) height is required to operating environment, night or foggy weather can not well be run because visual range is short.
Summary of the invention
For the above prior art, the technical problem to be solved in the present invention is to provide a kind of low latitude unmanned plane interference method,
It can carry out accurate interference in real time to the unmanned plane of invasion, and support to interfere more unmanned planes simultaneously；Interference signal
Power is small, on ambient enviroment and organism without influence；Narrow bandwidth, on non-targeted property equipment without influence；It is easy to operate, it might even be possible to
Unattended operation；It is small to environment, such as the dependence of sleet sky, lighting condition, even without dependence.
The present inventor passes through many experiments, provides a kind of low latitude unmanned plane interference method, comprising the following steps:
1) detection UAV targets emit the frequency hopping rule of signal；
2) narrow bandwidth small-power interference signal is modulated；
3) the modulated interference signal is converted to centre frequency and sample rate；
4) by soft frequency hopping, Xiang Suoshu UAV targets emit interference signal.
Preferably, setting centre frequency and sample rate are needed before carrying out the step 2), and are synchronized to intervention system
The remote controler of system.
Preferably, interference signal described in technical solution of the present invention is one or more, respectively s1, s2 ... ...,
sN。
Preferably, it is identical or not to emit frequency range by interference signal frequency range described in technical solution of the present invention and UAV targets
Together.
Preferably, the interference signal s1, s2 ... ..., sN can be with independent transmission or superposition transmittings.
Preferably, technical solution of the present invention the method step further comprises step 5), that is, detection interference effect,
If having succeeded jamming target unmanned plane, stop emitting interference signal, otherwise, return step 2), continue modulated interferer signal, and
Carry out subsequent step.
Preferably, technical solution of the present invention can intervene for one or more UAV targets.
Preferably, the power of interference signal described in technical solution of the present invention is 1~20W, and universal in the prior art
The power of the interference signal of use can greatly be extended instead in 50W or more, technical solution of the present invention using small-power interference signal
Unmanned machine equipment cruise duration.
Preferably, the bandwidth of interference signal described in technical solution of the present invention is no more than 10MHz, and general in the prior art
Bandwidth all over the interference signal used is in 100MHz or so.Technical solution of the present invention is selectively intervened using narrow bandwidth reaching
Meanwhile around non-targeted property unmanned plane and other civil equipments will not be interfered.
Unmanned plane interference method in low latitude of the present invention predicts UAV targets by soft frequency hopping tracking technique in real time
Frequency modulation point and launch time, reached and the technical effect accurately interfered in real time carried out to UAV targets/unmanned plane cluster.This
Inventing the technical solution also has interfering signal power small, on ambient enviroment and organism without influence；Narrowband interference, to non-mesh
Marking device is noiseless；To ambient enviroment, for example, the low dependence of rain and snow weather, lighting condition；It is easy to operate, it unattended can grasp
The beneficial effects such as work.
Detailed description of the invention
Fig. 1 is the step schematic diagram of interference method described in the embodiment of the present invention.
Fig. 2 is interference signal Overlay schematic diagram described in the embodiment of the present invention.
Specific embodiment
To enable above and other objects, features and advantages of the invention to be clearer and more comprehensible, below in conjunction with attached drawing and preferably
Embodiment low latitude unmanned plane interference method of the invention is described further, but embodiment is not intended as to protection of the invention
The restriction of range.
In the present invention, term " frequency hopping ", which refers to, to be not fixed when signal is sent in a frequency point, but is existed according to certain rule
The different time sends signal using different carrier frequencies.Under normal circumstances, carrier frequency possesses a cycle, the period it
Inside frequency hopping, the rule that this carrier frequency changes can be described as frequency hop sequences in a random fashion.It is repeatedly identical except period
Frequency-hopping sequences.Therefore, as long as the frequency hop sequences of detection a cycle, frequency-hopping carrier frequency can be predicted in next cycle.
Term " hard frequency hopping " refers to that carrier signal is generated by the crystal oscillator in radio frequency chip, when needing to adjust carrier frequency
When rate, carrier frequency caused by crystal oscillator is adjusted.Centainly steady is needed due to changing the signal frequency that oscillator generates
It fixes time, so hard frequency hopping generally will not quickly, a secondary frequencies could be changed by generally requiring several milliseconds to a few tens of milliseconds.
Term " soft frequency hopping ", is different from hard frequency hopping, and in soft frequency hopping, the carrier frequency that fixed crystal oscillator generates is mentioned
The sample rate of high RST output adjusts the center frequency of emitted narrow band signal by the way of Digital Signal Processing in a base band
Point, so that signal be made to be transmitted in required frequency point.This frequency-hopping mode is flexibly more many than hard frequency hopping, and frequency hopping changes speed
Degree depends on base band signal process speed.In general, can achieve the frequency shift speed of Microsecond grade.If using FPGA reality
Existing signal calculates, then can achieve real-time frequency change.
Term " narrow bandwidth " refers to that the bandwidth of the interference signal used in the technical program and 100MHz in the prior art are left
Right bandwidth is compared to substantially narrower, for example jamming signal bandwidth can be 1MHz or 3MHz in some embodiments.
Embodiment
Choosing smart 4 unmanned planes of 2 big boundary, (unmanned plane of selection possesses 30 to 50 jumps between 2400~2483MHz
Frequency domain channel, specific channel quantity are had any different according to different type of machines, and the bandwidth of each channel is about 1MHz), use is of the present invention
Low latitude unmanned plane interfering system interfered.
Specific steps are as shown in Figure 1, comprising:
1. the center frequency point that this interfering system transmitter is arranged is 2450MHz, sample rate 100MHz；
2. being synchronized to the remote signal that unmanned controller is emitted；
3. according to detector provide UAV targets' remote controler frequency hopping rule, prediction the next frequency modulation point of remote controler and
Time, as after 10 milliseconds in 2430MHz；Another remote controler be 12 milliseconds after in 2460MHz；The remote signal of every remote controler
Emission duration is 3 milliseconds.
4. generating 1MHz interference signal, generally white noise.
5. interference signal 1 is modulated to -20MHz center frequency point, it is denoted as s1；Interference signal 2 is modulated to the center 10MHz frequency
Point, is denoted as s2；Two interference signals are superimposed, are denoted as s=s1+s2, as shown in Figure 2.
6. modulated interference signal is converted to 2450MHz, emitted using 100MHz sample rate.
7. emitting s1 at 10 milliseconds, emit s at 12 milliseconds, emit s2 at 13 milliseconds, stops hair at 15 milliseconds
Penetrate interference signal.
8. predicting next frequency hopping frequency point, step 3 is returned to.
The present invention is by executing the above operating procedure, using small-power narrow-band interference signal (1MHz), successfully interferes 2 big
Boundary 4 unmanned planes of spirit.The power of interference signal just corresponds to the transmission power of several unmanned controllers, and interferes for narrowband,
Technology is followed by soft frequency hopping, the frequency hopping rule of more unmanned controllers can be followed simultaneously, it is distant in UAV targets' cluster
Immediately emit the narrow-band interference signal with the identical or different frequency range of each unmanned controller when controlling device transmitting signal, it is carried out together
When interfere, without influence environment in other communication equipments and the unmanned plane of other non-attack targets operation.In addition, institute of the present invention
The low latitude unmanned plane interference method stated can be used in combination with unmanned plane detection device, accomplish round-the-clock unattended operation, and
It is not affected by environment, it can be run at rainy day, greasy weather, night.
The above is merely preferred embodiments of the present invention, this does not limit the scope of protection of the present invention, this field skill
Art personnel under the premise of being detached from the principle of the present invention, done simple etc. according to the present invention by claims and summary of the invention
Effect variation and modification, all still fall within the protection scope of present patent application.
Claims (10)
1. a kind of low latitude unmanned plane interference method, it is characterised in that: the following steps are included:
1) detection UAV targets emit the frequency hopping rule of signal；
2) narrow bandwidth small-power interference signal is modulated；
3) the modulated interference signal is converted to centre frequency and sample rate；
4) by soft frequency hopping, Xiang Suoshu UAV targets emit interference signal.
2. unmanned plane interference method in low latitude as described in claim 1, it is characterised in that: needed in setting before the step 2)
Frequency of heart and sample rate, and it is synchronized to the remote controler of interfering system.
3. unmanned plane interference method in low latitude as described in claim 1, it is characterised in that: the interference signal is one or more
It is a.
4. the low latitude unmanned plane interference method as described in any one of claim 1,3 or 4, it is characterised in that: the interference letter
It is identical or different that number frequency range and UAV targets emit frequency range.
5. unmanned plane interference method in low latitude as claimed in claim 3, it is characterised in that: one or more of interference signals point
Not Wei s1, s2 ..., sN.
6. unmanned plane interference method in low latitude as claimed in claim 5, it is characterised in that: interference signal s1, the s2 ... ...,
SN can be with independent transmission or superposition transmitting.
7. unmanned plane interference method in low latitude as described in claim 1, it is characterised in that: the method step further comprises step
It is rapid 5) to detect interference effect, if having succeeded jamming target unmanned plane, stop emitting interference signal, otherwise, return step
2)。
8. the low latitude unmanned plane interference method as described in any one of claim 1,4 or 7, it is characterised in that: the target without
Man-machine is one or more.
9. the low latitude unmanned plane interference method as described in any one of claim 1,3 or 5, it is characterised in that: the interference letter
Number power be 1~20W.
10. the low latitude unmanned plane interference method as described in any one of claim 1,3 or 5, it is characterised in that: the interference letter
Number bandwidth be no more than 10MHz.
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| CN201810202153.2A CN110266427A (en) | 2018-03-12 | 2018-03-12 | A kind of low latitude unmanned plane cluster interference method |
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| CN201810202153.2A CN110266427A (en) | 2018-03-12 | 2018-03-12 | A kind of low latitude unmanned plane cluster interference method |
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Cited By (2)
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| CN109004951A (en) * | 2018-08-10 | 2018-12-14 | 北京历正科技有限责任公司 | A kind of UAV Communication interference method and system |
| CN112600644A (en) * | 2021-02-06 | 2021-04-02 | 陕西山利科技发展有限责任公司 | Integrated anti-unmanned aerial vehicle system and method with white list and accurate striking |
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| US20130023201A1 (en) * | 2011-06-23 | 2013-01-24 | Coleman Timothy W | Systems and methods for radio frequency hopping communications jamming utilizing software defined radio platforms |
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| CN112600644A (en) * | 2021-02-06 | 2021-04-02 | 陕西山利科技发展有限责任公司 | Integrated anti-unmanned aerial vehicle system and method with white list and accurate striking |
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Application publication date: 20190920 |