CN109379161A - A kind of adaptive jammer system for unmanned plane - Google Patents
A kind of adaptive jammer system for unmanned plane Download PDFInfo
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- CN109379161A CN109379161A CN201811525374.XA CN201811525374A CN109379161A CN 109379161 A CN109379161 A CN 109379161A CN 201811525374 A CN201811525374 A CN 201811525374A CN 109379161 A CN109379161 A CN 109379161A
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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
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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
- H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
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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
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present invention discloses a kind of adaptive jammer system for unmanned plane, and live signal property detector carries out relative power detection to disturbed signal and communication system detects, and will test result and be sent to interference signal generator；The interference signal generator generates interference signal according to the testing result, is sent to disturbed signal through antenna.The system carries out relative power detection to disturbed signal by live signal property detector and communication system detects, interference signal generator sends specific interference signal according to testing result, so as to the feature for disturbed signal, specific interference signal is sent, jamming performance is optimal.
Description
Technical field
The present invention relates to unmanned plane perturbation technique fields, more particularly to a kind of adaptive disturbance system for unmanned plane
System.
Background technique
Generally there are three types of standards for existing unmanned plane interference system:
1, full frequency band is suppressed.Interference unit carries out always pressing type interference using frequency range of the white noise to required interference, makes nothing
Man-machine communication system and GPS system can not work normally.Interference unit design is relatively simple, it is easy to accomplish.But interference unit by
In the signal bandwidth of transmission, very wide therefore required equivalent power is very big, and power consumption can be very big.
2, Deceiving interference.Interference unit sends special signal, so that unmanned plane is locked or receive false signal, causes
Unmanned plane can not work normally.Interference unit design is extremely complex, can only generally cheat to the special system of Open Standard,
Such as GPS.But the particularity of its conflicting mode, needed for equivalent power it is lower, power consumption is smaller, and technical difficulty is very big, and
It needs to know the specific implementation of disturbed system, is otherwise unable to reach the purpose of interference.Deceiving interference is by making other side
Receiver mistake receives interference signal, locks false signal, so that normal signal can not be received, general communication system is all
There are the verifications means such as synchronization, pseudo-code, frame format, it is therefore desirable to know that the specific implementation of other side is possible to receive other side
Machine locking interference signal, rather than normal signal.Many communication systems and its underground specific implementation, are difficult to be cheated
Formula interference, and even if knowing its specific implementation, such as GPS, the realization difficulty of transmitter itself has substantially exceeded dry
System itself is disturbed, and its receiver also has many anti-spoofing algorithms and protected.
3, frequency hopping is suppressed.The signal that common frequency hopping compacting is sent is the bandlimited white noise acoustical signal of constant power, is done
It disturbs device and carries out frequency hopping interference using band limited white noise, can not work normally the communication system of unmanned plane and GPS system.Frequency point is
Random selection, can not concentrate on whole jamming powers in the frequency range of signal, it is understood that there may be energy dissipation.It is suppressed with full frequency band
Interference is compared, and relative power needed for reaching identical interference effect can reduce, related with frequency hopping speed and signal bandwidth.Its
Power consumption can be among the two of front, but its jamming performance depends on the frequency-hopping mode of interference system and the work of disturbed system
Standard.The parameters such as frequency hopping rate, the frequency hopping bandwidth of frequency hopping interference can all influence jamming performance, while also depend on disturbed system
Working form, such as OFDM, frequency hopping, FSK etc..
To sum up, existing unmanned plane interference system, is not relevant in disturbed bandwidth with the presence or absence of signal, be also indifferent to by
The feature of interference signal is only interfered according to fixed sending method, this there is interference signal to actual disturbed letter
It number is not optimum jamming signal, the problem of jamming performance is not optimal.
Summary of the invention
The object of the present invention is to provide a kind of adaptive jammer systems for unmanned plane, can be for disturbed signal
Feature sends specific interference signal, is optimal jamming performance.
To achieve the above object, the present invention provides following schemes:
A kind of adaptive jammer system for unmanned plane, comprising: sequence control module, with the sequence control module point
Radio frequency signal receiver, radio-frequency signal generator and the switch not connected, the real-time letter being connect with the radio frequency signal receiver
Number property detector, the interference signal generator being connect with the live signal property detector, and with the switch
The antenna of connection；The switch is connected between the antenna and the signal input part of the radio frequency signal receiver, and is connected
Between the antenna and the signal output end of the radio-frequency signal generator, the signal output end of the interference signal generator
It is connect with the signal input part of the radio-frequency signal generator；
The sequence control module is used to generate the control signal of 0~N of time slot, controls the radio frequency signal receiver, institute
State the working sequence of radio-frequency signal generator and the switch；The antenna is for receiving radio frequency signal；The switch is used
In connecting the radio frequency signal receiver in time slot 0, the radio-frequency signal generator is connected in 1~N of time slot；It is described to penetrate
Frequency signal receiver is used to the radio frequency signal received being converted to digital signal, and the digital signal is sent
To the live signal property detector；The live signal property detector is used to carry out relative power to the digital signal
Detection and communication system detection, and will test result and be sent to the interference signal generator；The interference signal generator is used
In generating digital interference signal according to the testing result, and the digital interference signal is sent to the radiofrequency signal and is occurred
Device；The radio-frequency signal generator is used to the digital interference signal being converted to radiofrequency signal, and the radiofrequency signal is passed through
The antenna is sent to disturbed signal.
Optionally, the sequence control module generates the control signal of a 0~N of time slot every cycle T, by the period
T is divided into 0~N of time slot, total N+1 time slot；Time slot 0 is to receive time slot, and 1~N of time slot is sending time slots, each time slot
τ seconds.
Optionally, the live signal property detector carries out quick Fu to the digital signal in the reception time slot
In leaf transformation, obtain frequency spectrum data a (k), k value is 1~N*m, and wherein N is band number, and m is the points of each frequency range, and k is fast
The signal serial number of fast Fourier transformation output, total N*m point；Frequency spectrum is divided into 1~N of frequency range, each band bandwidth is B, center
Frequency point is fBn, the mean power Pn, Pn calculated in section is the mean value of a (k (n)) squared absolute value, and wherein n is frequency range serial number, and n takes
Value is 1~N, and k (n) remains as the signal serial number of Fast Fourier Transform (FFT) output, and k (n) value is (n-1) * m+1~n*m, according to
The mean power Pn calculates relative power An,
Optionally, the live signal property detector for judging according to the digital signal in the reception time slot
In the digital signal whether comprising FSK/FM narrow band communication, frequency hopping communications, spread spectrum communication, single carrier or multicarrier system letter
Number feature, if so, then determining the classification of communication system according to the signal characteristic.
Optionally, when the live signal property detector determines that the classification of the communication system is frequency hopping communications or can not
When determining the classification of the communication system, the interference signal generator is generated using the interference of 1 full bandwidth pressing type of conflicting mode
The digital interference signal；When the live signal property detector determines that the classification of the communication system is FSK/FM narrow bandpass
One of letter, spread spectrum communication, single carrier and multicarrier system or it is a variety of when, the interference signal generator use conflicting mode
2 or conflicting mode 3 generate the digital interference signal.
Optionally, the conflicting mode 1 includes: to carry out frequency spectrum to sent interference signal according to the relative power An
Adjustment makes the power spectrum characteristic of the interference signal sent and receives the power spectrum characteristic matching for the signal that time slot receives, described
Matching refers to that the power spectrum characteristic distribution of the interference signal of the transmission meets p+A1, p+A2 ..., p+An, then when sending
1~N of gap is continuously transmitted, wherein p is the reference power of radio-frequency signal generator, and A1~An is adjustment amount；The interference signal of transmission
It is bandwidth for B*N, length is τ * N seconds, frequency point f0Bandlimited white noise acoustical signal n, the n=1~N of+B* (n-1), N number of signal is asked altogether
With obtained interference signal, the interference signal is sent since time slot 1, is terminated in time slot N transmission.
Optionally, it is f that the conflicting mode 2, which includes: in 1 dispatching centre frequency of sending time slots,B1, bandwidth B, power p+
The band limited white noise of A1, duration are τ seconds；It is f in 2 dispatching centre frequency of sending time slotsB2, bandwidth B, power is p+A2's
Band limited white noise, duration are τ seconds, are f in sending time slots N dispatching centre frequencyBN, bandwidth B, the band limit that power is p+AN
White noise, duration are τ seconds, wherein p is the reference power of radio-frequency signal generator, and A1~AN is adjustment amount.
Optionally, the conflicting mode 3 includes: the time slot accounting that dynamic adjustment sends frequency point, the relative power value An
Bigger, time slot accounting is more, and the relative power value An is smaller, and time slot accounting is smaller, to relative power value An setting one
A threshold value, the relative power value An are greater than the threshold value, then there are communications in frequency range locating for the relative power value An
Signal, 1~N of sending time slots send the interference signal of corresponding frequency band, the corresponding interference sent of frequency range n in turn in the cycle T
The centre frequency of signal is fBn, bandwidth B, power is the band limited white noise of p+An, and the duration is τ seconds, wherein p is radio frequency
The reference power of signal generator, An are adjustment amount；The relative power value An is less than the threshold value, then the relative power value
Communication transmission signal is not present in frequency range locating for An, does not send the interference signal of corresponding frequency band.
Optionally, the system works by 0~N of time slot loop cycle.
Optionally, the radio frequency signal includes disturbed signal and ambient noise.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: disclosed by the invention to be used for
The adaptive jammer system of unmanned plane, comprising: sequence control module, the radiofrequency signal being separately connected with the sequence control module
Receiver, radio-frequency signal generator and switch, the live signal property detector being connect with the radio frequency signal receiver, with institute
State the interference signal generator of live signal property detector connection, and the antenna with the switch connection；It is described to open
Connection is connected between the antenna and the signal input part of the radio frequency signal receiver, and is connected to the antenna and is penetrated with described
Between the signal output end of frequency signal generator, the signal output end of the interference signal generator and the radiofrequency signal occur
The signal input part of device connects；The sequence control module is used to generate the control signal of 0~N of time slot, controls the radio frequency letter
The working sequence of number receiver, the radio-frequency signal generator and the switch；The antenna is for receiving radio frequency signal；
The switch connects the radiofrequency signal hair in 1~N of time slot for connecting the radio frequency signal receiver in time slot 0
Raw device；The radio frequency signal receiver is used to be converted to the radio frequency signal received digital signal, and will be described
Digital signal is sent to the live signal property detector；The live signal property detector is used for the digital signal
Relative power detection and communication system detection are carried out, and will test result and be sent to the interference signal generator；The interference
Signal generator is used to generate digital interference signal according to the testing result, and the digital interference signal is sent to described
Radio-frequency signal generator；The radio-frequency signal generator is used to the digital interference signal being converted to radiofrequency signal, and by institute
It states radiofrequency signal and is sent to disturbed signal through the antenna.The system is by live signal property detector to disturbed signal
Relative power detection and communication system detection are carried out, interference signal generator sends specific interference signal according to testing result,
So as to the feature for disturbed signal, specific interference signal is sent, jamming performance is optimal.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is structure chart of the present invention for the adaptive jammer system embodiment of unmanned plane；
Fig. 2 is that the present invention shows for time slot division in the sequence control module of the adaptive jammer system embodiment of unmanned plane
It is intended to；
Fig. 3 is live signal property detector Mid Frequency of the present invention for the adaptive jammer system embodiment of unmanned plane
Divide schematic diagram；
Fig. 4 is the present invention for conflicting mode in the interference signal generator of the adaptive jammer system embodiment of unmanned plane
1 transceiving spectral schematic diagram；
Fig. 5 is the present invention for conflicting mode in the interference signal generator of the adaptive jammer system embodiment of unmanned plane
2 transceiving spectral schematic diagrames；
Fig. 6 is the present invention for conflicting mode in the interference signal generator of the adaptive jammer system embodiment of unmanned plane
3 transceiving spectral schematic diagrames.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of adaptive jammer systems for unmanned plane, can be for disturbed signal
Feature sends specific interference signal, is optimal jamming performance.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention will be further described in detail.
Fig. 1 is structure chart of the present invention for the adaptive jammer system embodiment of unmanned plane.Referring to Fig. 1, this is used for nothing
Man-machine adaptive jammer system, comprising:
Sequence control module 101, the radio frequency signal receiver 102 being separately connected with the sequence control module 101, radio frequency
Signal generator 103 and switch 104 (RF switch, dedicated for the device of radio-frequency receiving-transmitting switching), connect with the radiofrequency signal
Receive the live signal property detector 105 that device 102 connects, the interference connecting with the live signal property detector 105
Signal generator 106, and the antenna 107 being connect with the switch 104；The switch 104 is connected to the antenna 107 and institute
Between the signal input part for stating radio frequency signal receiver 102, and it is connected to the antenna 107 and the radio-frequency signal generator
Between 103 signal output end, the signal output end of the interference signal generator 106 and the radio-frequency signal generator 103
Signal input part connection.
The sequence control module 101 is used to generate the control signal of 0~N of time slot, controls the radio frequency signal receiver
102, the working sequence of the radio-frequency signal generator 103 and the switch 104；As shown in Fig. 2, the sequence control module
101 generate the control signal of a 0~N of time slot every cycle T, and the cycle T is divided into 0~N of time slot, total N+1 time slot；
Time slot 0 is to receive time slot, and 1~N of time slot is sending time slots, each time slot τ seconds.
The antenna 107 includes disturbed signal and environment for receiving radio frequency signal, the radio frequency signal
Noise, since the jamming target of this system is wireless communication system, the radiofrequency signal of receiving end is the nothing in environment
Line radiofrequency signal, including ambient noise and disturbed signal.Since the interference system of unmanned plane is interference wireless signal,
Receiving front-end setting antenna is for receiving wireless signal.
The switch 104 is connected for connecting the radio frequency signal receiver 102 in time slot 0 in 1~N of time slot
The radio-frequency signal generator 103.
The radio frequency signal (including disturbed signal) that the radio frequency signal receiver 102 is used to receive turns
It is changed to digital signal, and the digital signal is sent to the live signal property detector 105.
The live signal property detector 105 is used to carry out relative power detection and communication system to the digital signal
Detection, and will test result and be sent to the interference signal generator 106；The interference signal generator 106 is used for according to institute
It states testing result and generates digital interference signal, and the digital interference signal is sent to the radio-frequency signal generator 103；Institute
Radio-frequency signal generator 103 is stated for the digital interference signal to be converted to radiofrequency signal, and by the radiofrequency signal through institute
It states antenna 107 and is sent to disturbed signal.
The live signal property detector 105 carries out the digital signal in the reception time slot (time slot 0) fast
Fast Fourier transformation obtains frequency spectrum data a (k), and k value is 1~N*m, and wherein N is band number, and m is the points of each frequency range, k
For the signal serial number of Fast Fourier Transform (FFT) output, total N*m point；Frequency spectrum is divided into 1~N of frequency range, each band bandwidth is B,
Center frequency point is fBn, the mean power Pn, Pn calculated in section is the mean value of a (k (n)) squared absolute value, and wherein n is frequency range sequence
Number, n value is 1~N, and k (n) remains as the signal serial number of Fast Fourier Transform (FFT) output, only increases and frequency range serial number
Relevance, k (n) value are the calculation formula that (n-1) * m+1~n*m, k (n)=(n-1) * m+1~n*m are k, such as: frequency range 1
When, n=1, k (1) value is 1,2,3 ..., m, when frequency range 2, n=2, k (2) value is m+1, m+2, m+3 ..., 2*m, with this
Analogize；Relative power An is calculated according to the mean power Pn,The relative power An is
Spectrum signature in the period.The digital signal includes the disturbed signal through 102 turns of the radio frequency signal receiver
The digital signal of the disturbed signal changed includes time-domain signal in the digital signal of the disturbed signal, the time domain letter
By carry out Fast Fourier Transform (FFT) number in the live signal property detector 105, institute is calculated by Fast Fourier Transform (FFT)
The frequency spectrum of time-domain signal is stated, to obtain frequency spectrum data, as shown in figure 3, being that frequency range 1 arrives frequency range N by spectrum fragmentation, is drawn at equal intervals
Point, such as 840MHz~900MHz point is 6 sections, 840~850,850~860 ..., 890~900, mono- section of every 10MHz.
The live signal property detector 105 can calculate a spectrum signature (relatively in reception time slot 0 every cycle T
Power An), real-time tracking signal intensity.The live signal property detector 105 is used to calculate relative power detection and communication
System detection, spectrum signature, power spectrum characteristic all refer to relative power, other than quick frequency hopping system, general communication system
Power spectrum can't (second grade) quickly variation (will not occur the variation of spectrum signature in a short time) in a short time, because
This is the signal characteristic that can embody 1~N of time slot in the signal characteristic that time slot 0 detects, is not in time slot 0 and time slot 1
The signal characteristic of~N is entirely different, and the jamming performance decline for causing interference with signal is even invalid.
The live signal property detector 105 is also used in the reception time slot (time slot 0) be believed according to the number
Whether number (time-domain signal for including in the digital signal of the disturbed signal) judges in the digital signal comprising FSK/FM
Narrow band communication, frequency hopping communications, spread spectrum communication, single carrier or multicarrier system signal characteristic, if so, then special according to the signal
Levy the classification for determining communication system.Since common communication system includes the narrow band communications such as FSK/FM, frequency hopping communications, spreads and lead to
The systems such as letter, single carrier, multicarrier, these communication systems have respective signal characteristic, therefore the live signal feature is examined
It surveys device 105 and docks the time-domain signal that time receiving gap (time slot 0) receives, calculated, judged by existing complicated algorithm
Whether include FSK/FM narrow band communication, frequency hopping communications, spread spectrum communication, single carrier or multicarrier system in obtained calculated result
Signal characteristic, if so, then determining the classification of communication system according to the signal characteristic.
When the live signal property detector 105 determines that the classification of the communication system is frequency hopping communications or can not determine
When the classification of the communication system, the interference signal generator is using described in the interference generation of 1 full bandwidth pressing type of conflicting mode
Digital interference signal；As shown in figure 4, the conflicting mode 1 includes: according to the relative power An (signal characteristic) to be sent
Interference signal carry out frequency spectrum adjustment, make send interference signal power spectrum characteristic (signal power feature) and reception time slot
The power spectrum characteristic (signal power feature) for the signal that (time slot 0) receives matches, described to match the interference for referring to the transmission
The power spectrum characteristic distribution of signal meets p+A1, p+A2 ..., p+An, then continuously transmits in 1~N of sending time slots, wherein p is
The reference power (signal that radio-frequency signal generator generates has a reference power value) of radio-frequency signal generator, A1~An is to adjust
Whole amount；The interference signal of transmission is that bandwidth is B*N, and length is τ * N seconds, frequency point f0The bandlimited white noise acoustical signal n of+B* (n-1),
N=1~N, the interference signal that N number of signal is summed altogether, the interference signal are sent since time slot 1, are sent and are tied in time slot N
Beam.The jamming pattern is the adaptive mode of full bandwidth pressing type interference, and the signal of transmission is no longer white noise, but has power
The distinctive signal (interference signal adjusted is no longer band limited white noise, but uneven band-limited signal) of fluctuating, signal are special
Sign calculates (above-mentioned live signal feature detection process) by receiving time slot.The conflicting mode, which is directed in frequency range, multiple signals point
The case where cloth the case where (disturbed frequency range in there are multiple disturbed signals), advantageously but power consumption was not reduced substantially, only
Increase jamming performance.
When the live signal property detector 105 determines that the classification of the communication system is FSK/FM narrow band communication, expands
One of frequency communication, single carrier and multicarrier system or it is a variety of when, the interference signal generator is using conflicting mode 2 or dry
It disturbs mode 3 and generates the digital interference signal；The conflicting mode 2 and the conflicting mode 3 are frequency hopping interference mode；Such as figure
Shown in 5, it is f that the conflicting mode 2, which includes: in 1 dispatching centre frequency of sending time slots,B1, bandwidth B, the band limit that power is p+A1
White noise, duration are τ seconds；It is f in 2 dispatching centre frequency of sending time slotsB2, bandwidth B, power is the bandlimited white noise of p+A2
Sound, duration are τ seconds, are f in sending time slots N dispatching centre frequencyBN, bandwidth B, power is the band limited white noise of p+AN,
Duration be τ second, wherein p be radio-frequency signal generator reference power (radio-frequency signal generator generation signal have one
Reference power value), A1~AN is adjustment amount.The conflicting mode is the adaptive model of frequency hopping interference, by receiving time slot meter
The power (above-mentioned live signal feature detection process) sent is calculated, jamming performance is improved.The conflicting mode is directed to narrow band communication more
It is advantageous, and equivalent jamming power increases, lower power consumption in the case where same jamming performance.As shown in fig. 6, the disturber
Formula 3 includes: the time slot accounting that dynamic adjustment sends frequency point, is no longer corresponding 1 time slot of 1 frequency point, detects high-power time slot accounting
More, the small time slot accounting of detection power is smaller, to there may be the frequency ranges of signal of communication (to be sentenced by relative power value
Disconnected, relative power value is bigger, and explanation is bigger a possibility that there are signals, while relative power value is bigger, to interfere dry needed for it
It is also bigger to disturb signal energy) more interfered, to improve jamming performance.The i.e. described relative power value An is bigger, and time slot accounts for
Than more, the relative power value An is smaller, and time slot accounting is smaller, by setting a threshold value to the relative power value An
(thresholding), the relative power value An are greater than the threshold value, then there may be communications in frequency range locating for the relative power value An
Signal is transmitted, 1~N of sending time slots sends the interference signal of corresponding frequency band in turn in the cycle T, the corresponding transmission of frequency range n
The centre frequency of interference signal is fBn, bandwidth B, power is the band limited white noise of p+An, and the duration is τ seconds, wherein p is
The reference power (signal that radio-frequency signal generator generates has a reference power value) of radio-frequency signal generator, An is adjustment
Amount；Assuming that frequency range 3,4, the relative power value An of k, k+1 be greater than thresholding, remaining frequency range is less than thresholding, then 1~N of sending time slots is only
Frequency range 3,4, the interference signals of k and k+1 this 4 frequency points are sent, this 4 frequency points are sent in turn within the period, until the next period
Again it detects；The corresponding signal center frequency sent of frequency range 3 is fB3, bandwidth B, power is the band limited white noise of p+A3, is continued
Time is τ seconds；The corresponding signal center frequency sent of frequency range k is fBk, bandwidth B, power is the band limited white noise of p+Ak, is continued
Time is τ seconds.The relative power value An is less than the threshold value, then there is no communications in frequency range locating for the relative power value An
Signal is transmitted, does not send the interference signal of corresponding frequency band.The conflicting mode remains as the adaptive model of frequency hopping interference, passes through
It receives time slot to judge to carry out adaptive disturbance with the presence or absence of communication transmission signal in the frequency range, function can be effectively reduced
Consumption, improves equivalent jamming power.
This is used for the adaptive jammer system of unmanned plane, works by time slot 0~N loop cycle, passes through live signal feature
Detector carries out relative power detection to disturbed signal and communication system detects, and is carried out by interference signal generator adaptive
Interference, wherein communication system detects corresponding communication system adaptive disturbance, and relative power detection corresponding spectrum feature is adaptively done
It disturbs.Power spectrum characteristic, Power Spectrum Distribution, Energy distribution, spectrum signature etc. each mean the result that relative power detects.It is described
Adaptive disturbance, which refers to, calculates the signal characteristic in disturbed frequency range by receiving time slot 0 come the real-time interference letter for adjusting transmission
Number, reach more preferably jamming performance (interference signal goes to adapt to the signal characteristic in disturbed frequency range automatically).Communication system is adaptive
If should interfere includes: to detect frequency hopping communications or do not judge any communication system, 1 full bandwidth pressure of conflicting mode is used
Standard interference.Frequency hopping interference mode 2 or 3 can be used in remaining system.When spectrum signature adaptive disturbance includes: according to receiving
The calculated spectrum signature An (relative power An) of gap 0, sends specific signal (conflicting mode 1/2/ in 1~N of sending time slots
The interference signal sent in 3) carry out adaptive disturbance.The system is by carrying out the live signal feature (power spectral energies of signal
Distribution characteristics) detection, detection needs the signal characteristic in interference band to be distributed (signal in specific time slot (receiving time slot 0)
Power spectral energies distribution characteristics), adaptive disturbance signal is then sent, i.e., according to the signal characteristic detected, is sent specific
Interference signal (interference signal in conflicting mode 1/2/3)；By receiving the disturbed signal in frequency range, disturbed signal is analyzed
Feature, specific interference signal is then sent, so that jamming performance has reached optimal.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand system and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of adaptive jammer system for unmanned plane characterized by comprising sequence control module, with the time slot
Radio frequency signal receiver, radio-frequency signal generator and the switch that control module is separately connected connect with the radio frequency signal receiver
The live signal property detector connect, the interference signal generator being connect with the live signal property detector, and
With the antenna of the switch connection；The switch be connected to the antenna and the radio frequency signal receiver signal input part it
Between, and be connected between the antenna and the signal output end of the radio-frequency signal generator, the interference signal generator
Signal output end is connect with the signal input part of the radio-frequency signal generator；
The sequence control module is used to generate the control signal of 0~N of time slot, controls the radio frequency signal receiver, described penetrates
The working sequence of frequency signal generator and the switch；The antenna is for receiving radio frequency signal；It is described switch for
The radio frequency signal receiver is connected when time slot 0, connects the radio-frequency signal generator in 1~N of time slot；The radio frequency letter
Number receiver is used to the radio frequency signal received being converted to digital signal, and the digital signal is sent to institute
State live signal property detector；The live signal property detector is used to carry out relative power detection to the digital signal
It is detected with communication system, and will test result and be sent to the interference signal generator；The interference signal generator is used for root
Digital interference signal is generated according to the testing result, and the digital interference signal is sent to the radio-frequency signal generator；
The radio-frequency signal generator is used to be converted to the digital interference signal radiofrequency signal, and will be described in radiofrequency signal warp
Antenna is sent to disturbed signal.
2. the adaptive jammer system according to claim 1 for unmanned plane, which is characterized in that the sequence control mould
Block generates the control signal of a 0~N of time slot every cycle T, and the cycle T is divided into 0~N of time slot, total N+1 time slot；
Time slot 0 is to receive time slot, and 1~N of time slot is sending time slots, each time slot τ seconds.
3. the adaptive jammer system according to claim 2 for unmanned plane, which is characterized in that the live signal is special
It levies detector and Fast Fourier Transform (FFT) is carried out to the digital signal in the reception time slot, obtain frequency spectrum data a (k), k takes
Value is 1~N*m, and wherein N is band number, and m is the points of each frequency range, and k is the signal serial number of Fast Fourier Transform (FFT) output, altogether
N*m point；Frequency spectrum is divided into 1~N of frequency range, each band bandwidth is B, center frequency point fBn, the mean power Pn in section is calculated,
Pn is the mean value of a (k (n)) squared absolute value, and wherein n is frequency range serial number, and n value is 1~N, and k (n) remains as fast Fourier
The signal serial number of output is converted, k (n) value is (n-1) * m+1~n*m, relative power An is calculated according to the mean power Pn,
4. the adaptive jammer system according to claim 3 for unmanned plane, which is characterized in that the live signal is special
Whether sign detector for judging in the digital signal comprising FSK/FM according to the digital signal in the reception time slot
Narrow band communication, frequency hopping communications, spread spectrum communication, single carrier or multicarrier system signal characteristic, if so, then special according to the signal
Levy the classification for determining communication system.
5. the adaptive jammer system according to claim 4 for unmanned plane, which is characterized in that when the live signal
It is described when property detector determines that the classification of the communication system is frequency hopping communications or can not determine the classification of the communication system
Interference signal generator generates the digital interference signal using the interference of 1 full bandwidth pressing type of conflicting mode；When the real-time letter
Number property detector determines that the classification of the communication system is FSK/FM narrow band communication, spread spectrum communication, single carrier and multicarrier body
One of system or it is a variety of when, the interference signal generator generates the digital interference using conflicting mode 2 or conflicting mode 3
Signal.
6. the adaptive jammer system according to claim 5 for unmanned plane, which is characterized in that the conflicting mode 1
Include: that frequency spectrum adjustment is carried out to sent interference signal according to the relative power An, makes the power of the interference signal sent
Spectrum signature and the power spectrum characteristic matching for receiving the signal that time slot receives, the matching refer to the interference signal of the transmission
Power spectrum characteristic distribution meets p+A1, p+A2 ..., p+An, then continuously transmits in 1~N of sending time slots, wherein p is radio frequency letter
The reference power of number generator, A1~An are adjustment amount；The interference signal of transmission is that bandwidth is B*N, and length is τ * N seconds, frequency point
For f0Bandlimited white noise acoustical signal n, the n=1~N of+B* (n-1), the interference signal that N number of signal is summed altogether, the interference letter
It number sends since time slot 1, terminates in time slot N transmission.
7. the adaptive jammer system according to claim 5 for unmanned plane, which is characterized in that the conflicting mode 2
Include: 1 dispatching centre frequency of sending time slots be fB1, bandwidth B, power is the band limited white noise of p+A1, duration τ
Second；It is f in 2 dispatching centre frequency of sending time slotsB2, bandwidth B, power is the band limited white noise of p+A2, and the duration is τ seconds,
It is f in sending time slots N dispatching centre frequencyBN, bandwidth B, power is the band limited white noise of p+AN, and the duration is τ seconds,
In, p is the reference power of radio-frequency signal generator, and A1~AN is adjustment amount.
8. the adaptive jammer system according to claim 5 for unmanned plane, which is characterized in that the conflicting mode 3
It include: the time slot accounting that dynamic adjustment sends frequency point, the relative power value An is bigger, and time slot accounting is more, the opposite function
Rate value An is smaller, and time slot accounting is smaller, sets a threshold value to the relative power value An, the relative power value An is greater than institute
Threshold value is stated, then there are communication transmission signals in frequency range locating for the relative power value An, and 1~N of sending time slots is in the cycle T
The interference signal of corresponding frequency band is sent in turn, and the centre frequency of the corresponding interference signal sent of frequency range n is fBn, bandwidth B, power
For the band limited white noise of p+An, the duration is τ seconds, wherein p is the reference power of radio-frequency signal generator, and An is adjustment amount；
The relative power value An is less than the threshold value, then communication transmission signal is not present in frequency range locating for the relative power value An,
The interference signal of corresponding frequency band is not sent.
9. the adaptive jammer system according to claim 1 for unmanned plane, which is characterized in that the system presses time slot
The work of 0~N loop cycle.
10. the adaptive jammer system according to claim 1 for unmanned plane, which is characterized in that the less radio-frequency
Signal includes disturbed signal and ambient noise.
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