CN109728872B - Unmanned aerial vehicle interference system and method based on digital frequency storage technology - Google Patents
Unmanned aerial vehicle interference system and method based on digital frequency storage technology Download PDFInfo
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Abstract
The invention belongs to the field of radio electronic countermeasure, and particularly relates to an unmanned aerial vehicle interference system and method based on a digital frequency storage technology. The system comprises a receiving unit, a storage unit, an interference signal generating unit and a transmitting unit which are connected in sequence, and further comprises a main control unit connected with the storage unit. This system carries out down the frequency conversion with the unmanned aerial vehicle signal of different frequency channels earlier, carry out analog-to-digital conversion through the ADC module, pass through FPGA storage in memory chip with digital signal again, receive a period of back, read out the digital signal in the DA module, through digital-to-analog conversion, pass through the up-conversion again, restore out the unmanned aerial vehicle signal, no matter which type of unmanned aerial vehicle so, communication signal adopts which kind of encoding mode, the frequency point is how much, as long as can all carry out the communication signal with unmanned aerial vehicle itself in the working wave band and disturb it.
Description
Technical Field
The invention belongs to the field of radio electronic countermeasure, and particularly relates to an unmanned aerial vehicle interference system and method based on a digital frequency storage technology.
Background
Unmanned aerial vehicle's characteristics do: the flying height is lower, and the volume is less, and flying speed is slower, uses the scene more extensive, consequently more difficult to unmanned aerial vehicle's detection. In recent years, the state continuously strengthens the supervision of civil aircrafts such as unmanned planes, and corresponding general aviation flight control regulations are issued. Therefore, the flight of the drone must meet the flight safety requirements of the aircraft, the qualification requirements of the drone operator, and the like.
At present, the development and popularization of unmanned aerial vehicles at home and abroad are more and more rapid, and a plurality of enthusiasts who already possess the unmanned aerial vehicles appear. However, many unmanned aerial vehicles in China still cannot meet the airworthiness requirements of civil aviation departments, are in a 'black flight' state, and have great threats to public safety due to the unmanned opportunity of illegal use. In recent two years, many events that unmanned aerial vehicles approach to stop flights occur in China, and huge economic losses are caused.
The general approach taken to address the above problem is:
1. physical interception mode:
the commonly used interception methods are: the fighter plane knocks down or forces to land the unmanned plane, the ground gun holder knocks down the unmanned plane, and the laser weapon is used for knocking down the unmanned plane and the unmanned plane is intercepted by using an interception net;
2. electromagnetic wave interference method:
the main interference methods are as follows: the method comprises the following steps that noise suppression interference or deception interference is carried out, and the noise suppression interference has various modes, such as high-power full-frequency-band coverage interference, tracking interference, comb interference and the like; spoofing interference is primarily the simulation of generating communication signals that are the same as or similar to the drone control and navigation signals.
The high-power full-frequency-band coverage interference mode is to generate a noise signal with power far larger than the frequency band of the control and navigation signals of the unmanned aerial vehicle to interfere the unmanned aerial vehicle, and the interference mode has the advantages that the noise signal is generated simply and is easy to realize; the disadvantage is that the interference power is too high, which affects other normal radio communications. To solve this problem, the patent numbers are: CN108199802A, patent name: the method provided in the unmanned aerial vehicle interference system and the interference method based on electromagnetic interference can concentrate interference power near narrower frequency points, and can achieve the effect of cutting off a control link of the unmanned aerial vehicle by adopting the power slightly larger than the remote control signal power. However, the mode still adopts a noise suppression method, so that the interference effect is achieved, the power of an interference signal reaching the front end of a receiving antenna of the unmanned aerial vehicle is 3-6 dB greater than that of a communication signal of the unmanned aerial vehicle, and the size and the power consumption of the system are larger.
For noise suppression jamming system, the prior art has proposed a deceptive jamming system for unmanned aerial vehicle, and this system produces through jamming signal generator with unmanned aerial vehicle assorted jamming signal, passes through digital-to-analog conversion again, up-conversion, power amplification, finally radiates to unmanned aerial vehicle through the antenna. But current unmanned aerial vehicle kind is more and more, and different producers are in unmanned aerial vehicle communication, and communication signal adopts different encoding mode, and when consequently independently simulating the communication signal who produces unmanned aerial vehicle, not only need know unmanned aerial vehicle communication encoding mode, still need know its work frequency point, and it is great to carry out the degree of difficulty of disturbing to unmanned aerial vehicle.
Disclosure of Invention
Aiming at the problems that the interference system in the prior art is large in size and power consumption and difficult to acquire communication coding modes of different unmanned aerial vehicles, the invention provides an unmanned aerial vehicle interference system based on a digital frequency storage technology, which is realized by adopting the following technical scheme:
an unmanned aerial vehicle interference system based on a digital frequency storage technology comprises a receiving unit, a storage unit, an interference signal generating unit, a main control unit and a transmitting unit, and is characterized in that,
the receiving unit is used for receiving the communication signal and the navigation signal of the unmanned aerial vehicle, judging whether the communication signal of the unmanned aerial vehicle exists or not, and preprocessing the communication signal and the navigation signal of the unmanned aerial vehicle, wherein the preprocessing comprises power amplification, down conversion and filtering;
the storage unit is used for converting the preprocessed communication signals and navigation signals received by the receiving unit into digital signals and storing the digital signals, and transmitting the digital signals to the interference signal generating unit after receiving the interference command of the main control unit;
the main control unit is used for issuing an interference command to the storage unit and the interference signal generating unit;
the interference signal generating unit is used for receiving the digital signal transmitted by the storage unit after receiving the interference command of the main control unit, converting the digital signal into an analog signal and performing up-conversion to obtain an interference signal;
the transmitting unit is used for filtering and power amplifying the interference signals generated by the interference signal generating unit according to the corresponding working wave bands, and radiating the filtered and power amplified interference signals to the unmanned aerial vehicle by using the directional antenna for interference.
Further, the receiving unit comprises a receiving antenna, a low noise amplifier, a down conversion module, a power divider and a band pass filter which are connected in sequence, and the receiving unit further comprises a DLVA connected between the power divider and the storage unit, wherein the band pass filter is connected with the storage unit;
the storage unit comprises an ADC module, an FPGA and a storage chip which are sequentially connected, wherein the ADC module is connected with the FPGA, and the FPGA is connected with the storage chip, the main control unit and the interference signal generation unit;
the interference signal generating unit comprises a DAC module, an up-conversion module, a local oscillator module and a clock management module, wherein the DAC module is connected with the up-conversion module, the local oscillator module is connected with the down-conversion module, the up-conversion module and the clock management module, the clock management module is connected with the ADC module and the DAC module, and the up-conversion module is connected with the transmitting unit;
the transmitting unit comprises a switch, a filter module, a power amplifier module and a directional antenna module which are sequentially connected, wherein the filter module comprises an L-band filter, an S-band filter and a C-band filter, the power amplifier module comprises an L-band power amplifier, an S-band power amplifier and a C-band power amplifier, and the directional antenna module comprises an L-band directional antenna, an S-band directional antenna and a C-band directional antenna.
Further, in the storage unit, the ADC module is configured to perform analog-to-digital conversion on the down-converted signal by using a sampling clock, and then send the converted digital signal to the FPGA; the FPGA is used for realizing the functions of selecting, controlling and reading the local oscillator and communicating with the main control unit; the storage chip is used for storing the digital signals after the analog-to-digital conversion;
in the interference signal generating unit, the DAC module is used for converting the digital signals read from the memory chip into analog signals by adopting a recovery clock which is the same as the sampling clock; the local oscillation module is used for providing a local oscillation source required by frequency conversion for the down-conversion module and the up-conversion module and simultaneously providing a sampling clock for the ADC module and the DAC module; the clock management module is used for dividing the frequency of the sampling clock provided by the local oscillator and then respectively sending the frequency divided sampling clock to the ADC module and the DAC module to be used as the sampling clock and the recovery clock; the up-conversion module is used for recovering the baseband signal to an interference signal required by the unmanned aerial vehicle.
Furthermore, the receiving antenna is an omnidirectional antenna with the frequency of 1-6 GHz.
Further, the memory chip adopts a DDR chip.
An unmanned aerial vehicle interference method based on a digital frequency storage technology comprises the following steps:
step 1: acquiring a communication signal and a navigation signal of the unmanned aerial vehicle by using the receiving antenna, and performing power amplification on the communication signal and the navigation signal of the unmanned aerial vehicle to obtain S1;
step 2: performing down-conversion on S1, filtering to obtain S2, dividing S2 into two paths of same signals by using a power divider, transmitting one path of same signals to DLVA (digital video amplitude converter) for judging whether the communication signals of the unmanned aerial vehicle exist, and transmitting the other path of same signals to an ADC (analog to digital converter) module for performing real-time analog-digital conversion to obtain a digital signal S3;
and step 3: if the DLVA detects that the communication signal of the unmanned aerial vehicle exists in the step 2, the FPGA reads S3 and stores S3 in a storage chip, meanwhile, the FPGA transmits an alarm signal to a main control unit, the main control unit issues an interference starting command, the FPGA reads S3 in the storage chip and performs digital-to-analog conversion to obtain an analog signal S4, and the step 4 is entered; if the DLVA does not detect the communication signal of the unmanned aerial vehicle in the step 2, the S3 is not stored in the storage chip, and the main control unit does not send an interference command;
and 4, step 4: and performing up-conversion on the S4 to restore an interference signal S5, turning on a switch according to the working waveband to which the S5 belongs, selecting a corresponding filter to filter the S5, sending the filtered S5 to a power amplifier of the corresponding working waveband for power amplification, and finally radiating the filtered and power-amplified interference signal to the unmanned aerial vehicle for interference through a directional antenna module of the corresponding working waveband.
Further, the operating frequency band in step 4 includes an L band, an S band, and a C band.
The invention also has the following beneficial effects:
(1) the invention adopts an interference mode based on a digital frequency storage technology, and can generate an interference signal completely consistent with the communication signal of the unmanned aerial vehicle, so that the interference signal reaching the front end of the receiving antenna of the unmanned aerial vehicle is equal to the power of the communication signal of the unmanned aerial vehicle, and the interference can be caused to the normal communication of the unmanned aerial vehicle, thereby greatly reducing the volume and the power consumption of the system.
(2) The invention can restore different types of unmanned aerial vehicle signals, and no matter which type of unmanned aerial vehicle is, which coding mode is adopted by the communication signals, and the number of working frequency points is, so long as the working frequency band is within, the communication signals of the unmanned aerial vehicle can be used for interfering the unmanned aerial vehicle.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention;
Detailed Description
FPGA: the FPGA is a chip with high arithmetic processing data speed and is commonly used for digital signal processing.
DLVA: and the detection logarithmic video amplifier is used for judging whether the external communication signal exists or not.
The main control unit comprises the following functions: the system comprises an initialization function of software and hardware, a system self-checking and fault display function, a system working parameter and working mode setting function, a system operation control and state display function and an interface communication function.
A low noise amplifier: the amplifier with low noise coefficient is generally used as a high-frequency or intermediate-frequency preamplifier of various radio receivers and an amplifying circuit of high-sensitivity electronic detection equipment.
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
An unmanned aerial vehicle interference method based on a digital frequency storage technology comprises the following steps:
step 1: acquiring a communication signal and a navigation signal of the unmanned aerial vehicle by using the receiving antenna, and performing power amplification on the communication signal and the navigation signal of the unmanned aerial vehicle to obtain S1;
step 2: performing down-conversion on S1, filtering to obtain S2, dividing S2 into two paths of same signals by using a power divider, transmitting one path of same signals to DLVA (digital video amplitude converter) for judging whether the communication signals of the unmanned aerial vehicle exist, and transmitting the other path of same signals to an ADC (analog to digital converter) module for performing real-time analog-digital conversion to obtain a digital signal S3;
and step 3: if the DLVA detects that the communication signal of the unmanned aerial vehicle exists in the step 2, the FPGA reads S3 and stores S3 in a storage chip, meanwhile, the FPGA transmits an alarm signal to a main control unit, the main control unit issues an interference starting command, the FPGA reads S3 in the storage chip and performs digital-to-analog conversion to obtain an analog signal S4, and the step 4 is entered; if the DLVA does not detect the communication signal of the unmanned aerial vehicle in the step 2, the S3 is not stored in the storage chip, and the main control unit does not send an interference command;
and 4, step 4: and performing up-conversion on the S4 to restore an interference signal S5, turning on a switch according to the working waveband to which the S5 belongs, selecting a corresponding filter to filter the S5, sending the filtered S5 to a power amplifier of the corresponding working waveband for power amplification, and finally radiating the filtered and power-amplified interference signal to the unmanned aerial vehicle for interference through a directional antenna module of the corresponding working waveband. Specifically, the working frequency band in step 4 includes an L band, an S band, and a C band.
The invention adopts an interference mode based on a digital frequency storage technology, and can generate an interference signal with the frequency completely consistent with the frequency of a communication signal and a navigation signal S1, so that the interference signal reaching the front end of the receiving antenna of the unmanned aerial vehicle can interfere the normal communication of the unmanned aerial vehicle when the power of the interference signal is equal to that of the communication signal of the unmanned aerial vehicle, and the volume and the power consumption of the system are greatly reduced. Meanwhile, no matter which type of unmanned aerial vehicle is adopted, which coding mode is adopted by the communication signal, the working frequency point is what, and as long as in the working waveband, the communication signal of the unmanned aerial vehicle can be used for interfering the unmanned aerial vehicle.
Referring to fig. 1, the present invention provides an unmanned aerial vehicle jamming system based on digital frequency storage technology, comprising a receiving unit, a storage unit, a jamming signal generating unit and a transmitting unit which are connected in sequence, and further comprising a main control unit connected with the storage unit,
the receiving unit comprises a receiving antenna, a low-noise amplifier, a down-conversion module, a power divider and a band-pass filter which are sequentially connected, and also comprises a DLVA connected between the power divider and the storage unit, wherein the band-pass filter is connected with the storage unit;
the storage unit comprises an ADC module, an FPGA and a storage chip which are sequentially connected, wherein the ADC module is connected with the FPGA, and the FPGA is connected with the storage chip, the main control unit and the interference signal generation unit;
the interference signal generating unit comprises a DAC module, an up-conversion module, a local oscillator module and a clock management module, wherein the DAC module is connected with the up-conversion module, the local oscillator module is connected with the down-conversion module, the up-conversion module and the clock management module, the clock management module is connected with the ADC module and the DAC module, and the up-conversion module is connected with the transmitting unit;
the transmitting unit comprises a switch, a filter module, a power amplifier module and a directional antenna module which are sequentially connected, wherein the filter module comprises an L-band filter, an S-band filter and a C-band filter, the power amplifier module comprises an L-band power amplifier, an S-band power amplifier and a C-band power amplifier, and the directional antenna module comprises an L-band directional antenna, an S-band directional antenna and a C-band directional antenna.
The receiving antenna is an omnidirectional antenna with the frequency of 1-6 GHz and is used for receiving communication signals and navigation signals of the unmanned aerial vehicle; the omnidirectional antenna shows that 360 degrees of uniform radiation and no directivity exist on a horizontal directional diagram, and shows that a beam with a certain width exists on a vertical directional diagram, and generally, the smaller the lobe width is, the larger the gain is.
Because the received signal power is very low, but the power of the signal required by back-end sampling is higher, the low-noise amplifier is used for amplifying the power of the signal received by the receiving antenna; because the frequency of the system work is higher, if the external signal is directly sampled, the undistorted sampling can be carried out on the signal by the sampling clock more than 2 times according to the sampling theorem, so that the requirement on an ADC chip is high, the design cost of the system is increased, the down-conversion module is used for converting the input signal into the baseband signal with lower frequency, and the sampling clock of the system is further reduced, so that the design cost of the system is reduced.
In the low noise amplifier, when a weak signal is amplified, the noise of the amplifier itself may cause serious interference to the signal, and therefore it is desirable to reduce the noise to improve the signal-to-noise ratio of the output.
The power divider is used for dividing the baseband signals into 2 paths of signals with equal power, wherein 1 path of signals is sent to the DLVA module, 1 path of signals is sent to the baseband band-pass filter for signal filtering, and if the DLVA module judges that the communication signals of the unmanned aerial vehicle exist, the filtered signals are transmitted to the FPGA; the band-pass filter is used for filtering other unwanted signals generated after down-conversion.
The storage unit comprises an ADC module, an FPGA and a storage chip which are sequentially connected, wherein the ADC module is connected with the FPGA, and the FPGA is connected with the storage chip, the main control unit and the interference signal generation unit; and the ADC module is used for performing analog-to-digital conversion on the down-converted signal and then sending the converted digital signal to the FPGA for storing the signal. Because the sampled signal of the system is a baseband signal, the ADC chip adopted in the system is a low-speed ADC chip, namely the sampling clock used by the chip is low.
The interference signal generating unit comprises a DAC module, an up-conversion module, a local oscillator module and a clock management module, wherein the DAC module is connected with the up-conversion module, the local oscillator module is connected with the down-conversion module, the up-conversion module and the clock management module, the clock management module is connected with the ADC module and the DAC module, and the up-conversion module is connected with the transmitting unit;
the DAC module is used for converting the digital signals read from the storage chip into analog signals, namely interference signals, by adopting a recovery clock which is the same as the sampling clock, so that distortion-free signal reduction is realized.
The FPGA is used for realizing the functions of local oscillator selection control, digital signal storage and reading and communication with the main control unit;
the storage chip is used for storing the digital signals after the analog-to-digital conversion;
preferably, the DDR chip is selected as the memory chip, the memory rate of the chip is not high, but the capacity is large and meets the requirement of the system.
The main control unit is a control core of the system, and has the main functions as follows:
(1) initialization functions of software and hardware: and the embedded software in the FPGA is controlled to be initialized, and the hardware of the ADC module, the DAC module and the storage chip is controlled to be initialized, so that the system can work normally.
(2) The system self-checking and fault display function: the main modules (FPGA, ADC module, DAC module, etc.) of the system are provided with self-checking functions, and a self-checking command is issued by the main control; when the modules have faults, the fault information is sent to the main control unit and displayed.
(3) The system working parameter and working mode setting function: and setting an interference frequency band, an interference mode and an interference parameter, issuing the interference parameter to the FPGA, and controlling the working mode of the system.
(4) The system operation control and state display function: issuing start, stop and other commands to control whether the system operates; displaying the current working state of the system;
(5) interface communication function: and communication with the FPGA is realized.
The memory chip mainly uses DDR and QDR chips, and compared with the former, the latter can realize the function of reading and writing at the same time.
The local oscillation module is used for providing a local oscillation source required by frequency conversion for the down-conversion module and the up-conversion module and simultaneously providing a sampling clock for the ADC module and the DAC module.
And the clock management module is used for dividing the frequency of the sampling clock provided by the local oscillator and then respectively sending the frequency divided sampling clock to the ADC module and the DAC module to be used as the sampling clock and the recovery clock.
The filter module is used for filtering redundant signals generated after up-conversion; the power amplifier module is used for performing power amplification on the filtered communication signals and navigation signals of different wave bands to obtain interference signals and sending the interference signals to the directional antenna module; the directional antenna module is used for radiating an interference signal which is the same as the received communication signal and navigation signal frequency band of the unmanned aerial vehicle to perform accurate interference.
The directional antenna module is used for realizing the conversion of microwave signals between equipment and free space, and has the characteristics that the radiation in one or a plurality of directions is particularly strong, and the radiation in other directions is particularly weak or zero.
Claims (4)
1. An unmanned aerial vehicle interference system based on a digital frequency storage technology comprises a receiving unit, a storage unit, an interference signal generating unit, a main control unit and a transmitting unit, and is characterized in that,
the receiving unit is used for receiving the communication signal and the navigation signal of the unmanned aerial vehicle, judging whether the communication signal of the unmanned aerial vehicle exists or not, and preprocessing the communication signal and the navigation signal of the unmanned aerial vehicle, wherein the preprocessing comprises power amplification, down conversion and filtering;
the storage unit is used for converting the preprocessed communication signals and navigation signals received by the receiving unit into digital signals and storing the digital signals, and transmitting the digital signals to the interference signal generating unit after receiving the interference command of the main control unit;
the main control unit is used for issuing an interference command to the storage unit and the interference signal generating unit;
the interference signal generating unit is used for receiving the digital signal transmitted by the storage unit after receiving the interference command of the main control unit, converting the digital signal into an analog signal and performing up-conversion to obtain an interference signal;
the transmitting unit is used for filtering and power amplifying the interference signal generated by the interference signal generating unit according to the corresponding working waveband, radiating the filtered and power-amplified interference signal to the unmanned aerial vehicle by using the directional antenna for interference, wherein the frequency band of the filtered and power-amplified interference signal is the same as that of the received communication signal and navigation signal of the unmanned aerial vehicle;
the receiving unit comprises a receiving antenna, a low-noise amplifier, a down-conversion module, a power divider and a band-pass filter which are sequentially connected, and also comprises a DLVA connected between the power divider and the storage unit, wherein the band-pass filter is connected with the storage unit;
the storage unit comprises an ADC module, an FPGA and a storage chip which are sequentially connected, wherein the ADC module is connected with the FPGA, and the FPGA is connected with the storage chip, the main control unit and the interference signal generation unit;
the interference signal generating unit comprises a DAC module, an up-conversion module, a local oscillator module and a clock management module, wherein the DAC module is connected with the up-conversion module, the local oscillator module is connected with the down-conversion module, the up-conversion module and the clock management module, the clock management module is connected with the ADC module and the DAC module, and the up-conversion module is connected with the transmitting unit;
the transmitting unit comprises a switch, a filter module, a power amplifier module and a directional antenna module which are sequentially connected, wherein the filter module comprises an L-band filter, an S-band filter and a C-band filter, the power amplifier module comprises an L-band power amplifier, an S-band power amplifier and a C-band power amplifier, and the directional antenna module comprises an L-band directional antenna, an S-band directional antenna and a C-band directional antenna;
in the storage unit, the ADC module is used for performing analog-to-digital conversion on the down-converted signal by using a sampling clock and then sending the converted digital signal to the FPGA; the FPGA is used for realizing the functions of selecting, controlling and reading the local oscillator and communicating with the main control unit; the storage chip is used for storing the digital signals after the analog-to-digital conversion;
in the interference signal generating unit, the DAC module is used for converting the digital signals read from the memory chip into analog signals by adopting a recovery clock which is the same as the sampling clock; the local oscillation module is used for providing a local oscillation source required by frequency conversion for the down-conversion module and the up-conversion module and simultaneously providing a sampling clock for the ADC module and the DAC module; the clock management module is used for dividing the frequency of the sampling clock provided by the local oscillator and then respectively sending the frequency divided sampling clock to the ADC module and the DAC module to be used as the sampling clock and the recovery clock; the up-conversion module is used for recovering the baseband signal to an interference signal required by the unmanned aerial vehicle;
the receiving antenna is an omnidirectional antenna with the frequency of 1-6 GHz.
2. The digital frequency storage technology-based unmanned aerial vehicle jamming system of claim 1, wherein the memory chip employs a DDR chip.
3. An unmanned aerial vehicle interference method based on a digital frequency storage technology is characterized by comprising the following steps:
step 1: acquiring a communication signal and a navigation signal of the unmanned aerial vehicle by using the receiving antenna, and performing power amplification on the communication signal and the navigation signal of the unmanned aerial vehicle to obtain S1;
step 2: performing down-conversion on S1, filtering to obtain S2, dividing S2 into two paths of same signals by using a power divider, transmitting one path of same signals to DLVA (digital video amplitude converter) for judging whether the communication signals of the unmanned aerial vehicle exist, and transmitting the other path of same signals to an ADC (analog to digital converter) module for performing real-time analog-digital conversion to obtain a digital signal S3;
and step 3: if the DLVA detects that the communication signal of the unmanned aerial vehicle exists in the step 2, the FPGA reads S3 and stores S3 in a storage chip, meanwhile, the FPGA transmits an alarm signal to a main control unit, the main control unit issues an interference starting command, the FPGA reads S3 in the storage chip and performs digital-to-analog conversion to obtain an analog signal S4, and the step 4 is entered; if the DLVA does not detect the communication signal of the unmanned aerial vehicle in the step 2, the S3 is not stored in the storage chip, and the main control unit does not send an interference command;
and 4, step 4: carrying out up-conversion on S4 to restore an interference signal S5, turning on a switch according to a working waveband to which S5 belongs and selecting a corresponding filter to filter S5, then sending the filtered S5 to a power amplifier of the corresponding working waveband for power amplification, and finally radiating the filtered and power-amplified interference signal to an unmanned aerial vehicle for interference through a directional antenna module of the corresponding working waveband, wherein the frequency band of the filtered and power-amplified interference signal is the same as that of the received communication signal and navigation signal of the unmanned aerial vehicle.
4. The digital frequency storage technology-based unmanned aerial vehicle jamming method of claim 3, wherein the operating bands in step 4 include an L-band, an S-band and a C-band.
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| CN110954873B (en) * | 2019-12-20 | 2022-01-25 | 北京航天微电科技有限公司 | Multi-band radar interference system and method |
| CN111224739B (en) * | 2020-01-20 | 2023-05-02 | 北京历正科技有限责任公司 | Power amplification device and unmanned aerial vehicle management and control equipment |
| CN111555837B (en) * | 2020-04-13 | 2023-06-27 | 安徽白鹭电子科技有限公司 | Ultra-short wave communication self-adaptive interference method and system |
| CN112887051A (en) * | 2021-01-11 | 2021-06-01 | 北京无线电计量测试研究所 | Unmanned aerial vehicle remote control signal interference unit and use method thereof |
| CN113612572A (en) * | 2021-08-31 | 2021-11-05 | 扬州宇安电子科技有限公司 | Unmanned aerial vehicle interference system who possesses protect function |
| CN114301571B (en) * | 2022-02-14 | 2024-03-12 | 中国人民解放军陆军工程大学 | Multi-rotor unmanned aerial vehicle countering method and system |
| CN114706102B (en) * | 2022-03-16 | 2022-11-25 | 扬州宇安电子科技有限公司 | High-power wave beam variable positioning interference device and method thereof |
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