CN107769886B - Signal interference device and method - Google Patents
Signal interference device and method Download PDFInfo
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- CN107769886B CN107769886B CN201610675950.3A CN201610675950A CN107769886B CN 107769886 B CN107769886 B CN 107769886B CN 201610675950 A CN201610675950 A CN 201610675950A CN 107769886 B CN107769886 B CN 107769886B
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
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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
- H04K3/40—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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Abstract
The invention provides a signal interference device and a method, wherein the device comprises: the receiving link is used for receiving an air signal, converting the air signal into a digital signal and sending the digital signal to the programmable interference source module; the programmable interference source module is used for desynchronizing the digital signal, generating a transmitting modulation signal according to a desynchronizing processing result and sending the transmitting modulation signal to a transmitting link; and the transmitting link is used for receiving the transmitting modulation signal, converting the transmitting modulation signal into a modulation interference signal and radiating the modulation interference signal to the air. The invention solves the problems of higher power requirement, higher equipment power consumption and incapability of completely blocking terminal communication of the existing terminal signal jammers.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal interference apparatus and method.
Background
With the rapid development of the mobile communication industry, the connectivity between people is increased rapidly, but at the same time, the convenient communication mode also increases the operation difficulty of signal interference of places (such as examination rooms, confidential meetings, prisons and the like) with special requirements on the connectivity.
The terminal signal interference unit is mainly used in places where terminals are forbidden to be used for communication, such as various examination rooms, schools, gas stations, churches, courtrooms, libraries, conference centers (rooms), movie theaters, hospitals, governments, finance, prisons, public security, military heavy places and the like. The terminal can be in the states of network searching, no signal, no service system and the like through the terminal signal interference device, so that the terminal signal is blocked, and the safety of an area needing to be shielded is ensured.
The signal interference mode that present common terminal signal jammer adopted usually is: a frequent way to scan from the low end frequency to the high end of the forward channel at a certain speed. However, the conventional signal interference method has problems in that: the frequency sweeping mode of scanning from the low-end frequency of the forward channel to the high-end frequency has a high requirement on the power of interference signals, and the terminal signal jammer is always in a frequent mode, so that the power consumption of the device is high, and for a flexibly configured communication system, such as a 4G (the 4th generation mobile communication technology) system, the communication between the terminal and the outside cannot be blocked, and the communication between the terminal and the outside cannot be completely blocked.
Disclosure of Invention
The invention provides a signal interference device and a signal interference method, which are used for solving the problems that the existing terminal signal interference device has higher power requirement, larger equipment power consumption and can not completely block terminal communication.
In order to solve the above problem, the present invention discloses a signal interference apparatus, comprising:
the receiving link is used for receiving an air signal, converting the air signal into a digital signal and sending the digital signal to the programmable interference source module;
the programmable interference source module is used for desynchronizing the digital signal, generating a transmitting modulation signal according to a desynchronizing processing result and sending the transmitting modulation signal to a transmitting link;
and the transmitting link is used for receiving the transmitting modulation signal, converting the transmitting modulation signal into a modulation interference signal and radiating the modulation interference signal to the air.
Preferably, the receiving link includes: antenna, limiter, low noise amplifier, mixer, and oscillator
A first antenna for receiving the aerial signal;
the amplitude limiter is used for carrying out amplitude limiting processing on the aerial signal;
the low-noise amplifier is used for carrying out low-noise amplification on the air signal after amplitude limiting processing;
the first frequency mixer is used for carrying out frequency conversion processing on the air signal after low-noise amplification according to the first local oscillation signal to obtain an intermediate frequency signal;
a first oscillator for generating the first local oscillation signal;
the first filter is used for filtering the intermediate frequency signal;
the first amplifier is used for amplifying the intermediate frequency signal after the filtering processing;
an analog-to-digital converter; and the intermediate frequency signal after the amplification processing is converted into the digital signal.
Preferably, the receiving link further includes: a first switch, a second switch, a third switch, and at least one of a filter link and a pass-through link;
wherein the content of the first and second substances,
the second switch and the third switch are used for controlling the selection of the at least one filtering link and the through link, and selecting one filtering link or one through link as a connecting link between the amplitude limiter and the low noise amplifier;
the first switch is used for controlling the air signal after the amplitude limiting processing to enter the first mixer.
Preferably, the transmission link includes:
the digital-to-analog converter is used for receiving the transmitting modulation signal and converting the transmitting modulation signal into an analog signal;
the second frequency mixer is used for carrying out frequency mixing processing on the analog signal according to a second local oscillator signal to obtain a pre-modulation interference signal; the frequency point of the pre-modulated interference signal is matched with an interference frequency point;
the second oscillator is used for generating the second local oscillation signal;
the second filter is used for carrying out filtering processing on the pre-modulation interference signal;
the second amplifier is used for amplifying the pre-modulated interference signal after the filtering processing;
the passive filter is used for filtering harmonic waves in the amplified pre-modulated interference signals to obtain the modulated interference signals;
a second antenna for radiating the modulated interference signal into the air.
Preferably, the transmission link further includes: a coupler disposed between the second amplifier and the passive filter;
the coupler is used for coupling the amplified pre-modulated interference signal to obtain a coupled signal and sending the coupled signal to the first frequency mixer through the first switch;
correspondingly, the programmable interference source module is further configured to detect the output power of the transmission link according to the coupling signal processed by the first mixer, the first filter, the first amplifier, and the analog-to-digital converter in sequence.
Preferably, the apparatus further comprises: the programmable interference source module is connected with the receiving link, the programmable interference source module and the transmitting link respectively;
the phase-locked loop is used for generating a clock signal and respectively sending the clock signal to the receiving link, the programmable interference source module and the transmitting link so as to realize the synchronization of the signal interference device.
The invention also discloses a signal interference method, which comprises the following steps:
receiving an aerial signal through a receiving link, converting the aerial signal into a digital signal, and sending the digital signal to a programmable interference source module;
performing desynchronization processing on the digital signal through a programmable interference source module, generating a transmitting modulation signal according to a desynchronization processing result, and sending the transmitting modulation signal to a transmitting link;
and receiving the transmitting modulation signal through a transmitting link, converting the transmitting modulation signal into a modulation interference signal, and radiating the modulation interference signal into the air.
Preferably, the receiving an air signal, converting the air signal into a digital signal, and sending the digital signal to a programmable interference source module includes:
receiving the aerial signal through a first antenna;
sequentially carrying out amplitude limiting processing of an amplitude limiter, low-noise amplification processing of a low-noise amplifier and mixing processing of a first mixer and a first oscillator on the air signal to obtain an intermediate frequency signal;
and sequentially carrying out filtering processing of a first filter, amplification processing of a first amplifier and analog-to-digital conversion processing of an analog-to-digital converter on the intermediate frequency signal to obtain the digital signal.
Preferably, the receiving an air signal, converting the air signal into a digital signal, and sending the digital signal to a programmable interference source module further includes:
controlling selection of at least one filter link and a through link by a second switch and a third switch, one selected from the at least one filter link and through link being a connecting link between the limiter and the low noise amplifier;
and the number of the first and second groups,
and controlling the air signal after the amplitude limiting processing to enter the first mixer through a first switch.
Preferably, the receiving, through the transmission link, the transmission modulation signal, converting the transmission modulation signal into a modulation interference signal, and radiating the modulation interference signal into the air includes:
receiving the transmitting modulation signal through a digital-to-analog converter, and converting the transmitting modulation signal into an analog signal;
generating and carrying out frequency mixing processing on the analog signal through a second frequency mixer and a second oscillator to obtain a pre-modulation interference signal; the frequency point of the pre-modulated interference signal is matched with an interference frequency point;
the pre-modulation interference signal is subjected to filtering processing of a second filter, amplification processing of a second amplifier and harmonic filtering processing of a passive filter in sequence to obtain the modulation interference signal;
radiating the modulated interference signal into the air through a second antenna.
Preferably, the receiving, through the transmission link, the transmission modulation signal, converting the transmission modulation signal into a modulation interference signal, and radiating the modulation interference signal into the air further includes:
coupling the pre-modulation interference signal through a coupler arranged between the second amplifier and the passive filter to obtain a coupled signal;
sending the coupled signal to the first mixer through the first switch;
accordingly, the method further comprises: and monitoring the coupling signals processed by the first frequency mixer, the first filter, the first amplifier and the analog-to-digital converter in sequence through the programmable interference source module, and determining the output power of the transmitting link.
Preferably, the method further comprises:
and generating a clock signal through a phase-locked loop, and respectively sending the clock signal to the receiving link, the programmable interference source module and the transmitting link so as to realize the synchronization of the signal interference device.
Compared with the prior art, the invention has the following advantages:
the invention discloses a signal interference device, comprising: the system comprises a receiving link, a programmable interference source module and a transmitting link. The receiving link can convert aerial signals used for indicating the environmental conditions of the interference area into digital signals and send the digital signals to the programmable interference source module, the programmable interference source module judges the environmental conditions of the external interference area according to the digital signals and generates transmitting modulation signals adaptive to the external environment, and finally the transmitting modulation signals are modulated and processed by the transmitting link and then radiated to the air, so that the interference and shielding of the signals in the interference area are realized. Therefore, in the invention, the detection of the interference region can be realized by acquiring the aerial signal in the interference region, and the programmable interference source module and the transmitting link can be used for generating the modulation interference signal by pertinently adopting different output powers of different interference sources. That is, the power is adjustable for different interference area ranges, and corresponding effective interference sources can be generated for different communication system targets, so that different application scenes are met, and interference and shielding on terminal signals under various scenes are effectively realized; moreover, continuous frequency sweep operation is avoided, the power requirement on the generated modulation interference signal is reduced, and the signal interference device does not need to be in a frequent mode, so that the power consumption of equipment is reduced.
Drawings
Fig. 1 is a block diagram of a signal interference apparatus according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an architecture of a signal interference apparatus according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating steps of a signal interference method according to a third embodiment of the present invention;
fig. 4 is a flowchart illustrating steps of a signal interference method according to a third preferred embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Referring to fig. 1, a block diagram of a signal interference apparatus according to a first embodiment of the present invention is shown. In this embodiment, the signal interference apparatus includes:
the receiving chain 10 is configured to receive an air signal, convert the air signal into a digital signal, and send the digital signal to a programmable interference source module.
In the present embodiment, the receiving chain 10 may receive the air signal by any suitable means, for example, but not limited to, by an antenna disposed in the receiving chain 10. Further, the receiving link 10 may convert the received air signal into a digital signal and send the digital signal to the programmable interference source module, so that the programmable interference source module analyzes the air environment according to the digital signal and determines a matched transmitting modulation signal according to an analysis result.
And the programmable interference source module 20 is configured to perform desynchronization processing on the digital signal, generate a transmission modulation signal according to a desynchronization processing result, and send the transmission modulation signal to a transmission link.
In this embodiment, the programmable interferer module 20 may implement configuration of control and parameters for the receive chain 10 and the transmit chain 30 described below.
Specifically, the programmable interference source module 20 may perform desynchronization processing on the digital signal reported by the receiving link 10, and implement control on the following transmitting link 30 and receiving link 10 according to the desynchronization processing result. For example, the programmable interference source module 20 may determine a frequency band, a format, and a power of a current interference region according to the desynchronization processing result; then, the emission modulation signal is generated and sent in a targeted manner, the modulation interference signal radiated by the emission link is ensured to be matched with the environment of the current interference area, and the green and energy-saving effects are achieved.
And the transmission link 30 is configured to receive the transmission modulation signal, convert the transmission modulation signal into a modulation interference signal, and radiate the modulation interference signal into the air.
In this embodiment, the transmission link 30 may convert the transmission modulation signal output by the programmable interference source module 20 into a modulation interference signal, and radiate the modulation interference signal into the air, so as to implement signal interference on an interference area.
In summary, the signal interference apparatus according to the present embodiment may include: the system comprises a receiving link, a programmable interference source module and a transmitting link. The receiving link can convert aerial signals used for indicating the environmental conditions of the interference area into digital signals and send the digital signals to the programmable interference source module, the programmable interference source module judges the environmental conditions of the external interference area according to the digital signals and generates transmitting modulation signals adaptive to the external environment, and finally the transmitting modulation signals are modulated and processed by the transmitting link and then radiated to the air, so that the interference and shielding of the signals in the interference area are realized. Therefore, in this embodiment, the detection of the interference region can be realized by acquiring the aerial signal in the interference region, and then the programmable interference source module and the transmission link are used to generate the modulation interference signal with different output powers of different interference sources in a targeted manner. That is, the power is adjustable for different interference area ranges, and corresponding effective interference sources can be generated for different communication system targets, so that different application scenes are met, and interference and shielding on terminal signals under various scenes are effectively realized; moreover, continuous frequency sweep operation is avoided, the power requirement on the generated modulation interference signal is reduced, and the signal interference device does not need to be in a frequent mode, so that the power consumption of equipment is reduced.
Example two
Referring to fig. 2, a schematic diagram of a signal interference apparatus according to a second embodiment of the present invention is shown. As shown in fig. 2, the signal interference apparatus may include: receive chain 10, programmable interferer module 20, transmit chain 30, and Phase Locked Loop (PLL) 40.
Wherein the content of the first and second substances,
the receiving chain 10 comprises: a first antenna 101, a limiter 104, a third switch 102, at least one filtering link and a through link, a second switch 103, a Low Noise Amplifier (LNA) 105, a first switch 106, a first mixer 107, a first filter 109, a first Amplifier 110 and an Analog-to-Digital Converter (a/D) 111, which are connected in sequence, and a first oscillator 108 connected to the first mixer 107.
The transmission chain 30 comprises: a Digital-to-analog converter (D/a) 308, a second mixer 306, a second filter 305, a second amplifier 304, a coupler 303, a Passive filter (LC filter)302, a second antenna 301, and a second oscillator 307 connected to the second mixer 306.
Specifically, the receiving chain 10 is configured to receive an air signal, convert the air signal into a digital signal, and send the digital signal to the programmable interference source module. And the programmable interference source module 20 is configured to perform desynchronization processing on the digital signal, generate a transmission modulation signal according to a desynchronization processing result, and send the transmission modulation signal to a transmission link. And the transmission link 30 is configured to receive the transmission modulation signal, convert the transmission modulation signal into a modulation interference signal, and radiate the modulation interference signal into the air.
In a preferred embodiment of this embodiment, in the receiving link 10:
the first antenna 101 is configured to receive the aerial signal; a limiter 104 for performing a limiting process on the air signal; a low noise amplifier 105 for performing low noise amplification on the amplitude-limited aerial signal; the first frequency mixer 107 is configured to perform frequency conversion processing on the air signal after low-noise amplification according to the first local oscillator signal to obtain an intermediate frequency signal; a first oscillator 108, configured to generate the first local oscillation signal; a first filter 109 for performing filtering processing on the intermediate frequency signal; a first amplifier 110, configured to amplify the filtered intermediate frequency signal; an analog-to-digital converter 111; and the intermediate frequency signal after the amplification processing is converted into the digital signal.
Preferably, the second switch 103 and the third switch 102 are configured to control selection of the at least one filtering link and the through link, and select one filtering link or one through link as a connection link between the limiter 104 and the low noise amplifier 105. The first switch 106 is configured to control the limited air signal to enter the first mixer 107.
To facilitate understanding of the link structure of the receiving link 10, the following is a brief description of a specific workflow of the receiving link 10: the signals (air signals) in the space enter the receiving link 10 after being processed by the first antenna 101 and the limiter 104, the air signals pass through the third switch 102 to select different filtering links or through links, pass through the second switch 103 to enter the low noise amplifier 105 for low noise amplification, pass through the first switch 106 and enter the first mixer 107, pass through the first local oscillator signal for down-conversion processing, convert the air signals into intermediate frequency signals, pass through the first filter 109 and the first amplifier 110 for filtering and amplification, pass through the analog-to-digital converter 111 to convert the intermediate frequency signals into digital signals, and transmit the digital signals to the programmable interference source module 20 for desynchronization processing.
It should be noted that, in this embodiment, the low noise amplifier 105 has a bypass function, and may be used to bypass the low noise amplifier when the received signal power is strong, so as to improve the dynamic range of the receiving link.
In another preferred aspect of this embodiment, in the transmitting link 30:
a digital-to-analog converter 308, configured to receive the transmission modulation signal and convert the transmission modulation signal into an analog signal; the second frequency mixer 306 is configured to perform frequency mixing processing on the analog signal according to a second local oscillator signal to obtain a premodulation interference signal; the frequency point of the pre-modulated interference signal is matched with an interference frequency point; a second oscillator 307 configured to generate the second local oscillation signal; a second filter 305, configured to perform filtering processing on the pre-modulated interference signal; the second amplifier 304 is configured to amplify the pre-modulated interference signal after the filtering processing; the passive filter 302 is configured to filter out a harmonic in the amplified pre-modulated interference signal to obtain the modulated interference signal; a second antenna 301 for radiating the modulated interference signal into the air.
Preferably, the coupler 303 may be configured to perform coupling processing on the amplified pre-modulated interference signal to obtain a coupled signal, and send the coupled signal to the first mixer 107 through the first switch 106. Correspondingly, the programmable interferer module 20 may further be configured to detect the output power of the transmission link 30 according to the coupled signal sequentially processed by the first mixer 107, the first filter 109, the first amplifier 110, and the analog-to-digital converter 111.
To facilitate understanding of the link structure of the transmission link 30, the following is a brief description of a specific workflow of the transmission link 30: the digital-to-analog converter 308 converts the transmission modulation signal output by the programmable interference source module 20 into an analog signal, the analog signal is mixed with a second local oscillation signal by the second mixer 306 and then adjusted to an interfered radio frequency point, stray signals such as out-of-band harmonics are filtered by the second filter 305, the amplified to a certain power by the power amplifier of the second amplifier 304, harmonics are filtered by the passive filter 302, interference to other frequency bands is avoided, a modulation interference signal is finally obtained, the modulation interference signal is radiated into the air by the second antenna 301, and interference to terminal signals in an interference area is realized.
After the analog signal is amplified to a certain power by the second amplifier 304, the amplified signal may be coupled by the coupler 303 to obtain a coupled signal with a certain energy, and the coupled signal may be sent to the first mixer 107 through the first switch 106, and then transmitted to the programmable interference source module 20 for transmission power detection after intermediate frequency processing analog-to-digital conversion, so as to ensure that the output power of the transmission link 30 meets the requirement.
It should be noted that, in this embodiment, a control signal may exist in the second amplifier 304, which is used to switch the amplifiers in the TD-LTE system, so as to ensure that no data is sent in the uplink timeslot and avoid interference to the communication base station.
In another preferred aspect of this embodiment, the phase-locked loop 40 may be connected to the receiving chain 10, the programmable interference source module 20, and the transmitting chain 30, respectively. As shown in fig. 2, the phase locked loop 40 may be connected to the analog-to-digital converter 111 in the receiving chain 10, the programmable interferer module 20, and the digital-to-analog converter 308 in the transmitting chain 30, respectively.
The phase-locked loop 40 may be configured to generate a clock signal and send the clock signal to the receiving link 10, the programmable interference source module 20, and the transmitting link 30, respectively, so as to achieve synchronization of the signal interference apparatus.
Further, the signal interference apparatus may further include: a DDR (Double Data Rate synchronous dynamic random access memory) 50, configured to store the Data processed by the programmable interference module 20, and perform desynchronization algorithm processing on the Data when the Data size meets the requirement.
In summary, in this embodiment, the receiving link may convert an aerial signal used for indicating the environmental condition of the interference area into a digital signal, and send the digital signal to the programmable interference source module, the programmable interference source module determines the environmental condition of the external interference area according to the digital signal, generates a transmission modulation signal adapted to the external environment, and finally, the transmission modulation signal is modulated and processed by the transmitting link and then radiated into the air, thereby achieving interference and shielding of the signal in the interference area. Therefore, in this embodiment, the signal interference device has adjustable power for different interference area ranges, and can generate corresponding effective interference sources for different communication system targets, thereby satisfying different application scenarios, and effectively realizing interference and shielding of terminal signals in various scenarios.
Secondly, in this embodiment, the working efficiency of the signal interference apparatus is improved by performing time division processing on the modulated interference signal. The receiving link is used for receiving the frequency band, the system and the power of the current environment, the current area needing interference is interfered in a targeted mode, the power amplifier is closed in the frequency band and the system which do not need interference, power consumption can be saved, and the effect of being green and energy-saving is achieved. And aiming at the working characteristics of various standard devices, only downlink interference is realized under the condition of effectively interfering the terminal, and the aim of not influencing the working of the base station is further achieved.
In addition, the transmitting link can be coupled to the receiving link through the coupler, and fault monitoring of the transmitting link is achieved.
EXAMPLE III
Based on the same inventive concept as the above device embodiment, referring to fig. 3, a flowchart of steps of a signal interference method in a third embodiment of the present invention is shown. In this embodiment, the signal interference method includes:
And 304, performing desynchronization processing on the digital signal through a programmable interference source module, generating a transmitting modulation signal according to a desynchronization processing result, and sending the transmitting modulation signal to a transmitting link.
It can be seen that, in this embodiment, the detection of the interference region can be achieved by acquiring the aerial signal in the interference region, and then the programmable interference source module and the transmission link are used to generate the modulation interference signal with different output powers of different interference sources in a targeted manner. That is, the power is adjustable for different interference area ranges, and corresponding effective interference sources can be generated for different communication system targets, so that different application scenes are met, and interference and shielding on terminal signals under various scenes are effectively realized; moreover, continuous frequency sweep operation is avoided, the power requirement on the generated modulation interference signal is reduced, and the signal interference device does not need to be in a frequent mode, so that the power consumption of equipment is reduced.
Referring to fig. 4, a flowchart of steps of a signal interference method according to a third preferred embodiment of the present invention is shown.
In a preferable scheme of this embodiment, the step 302 may specifically include: substep 3022, receiving the aerial signal via a first antenna; substep 3024, obtaining an intermediate frequency signal by sequentially performing amplitude limiting processing by an amplitude limiter, low noise amplification processing by a low noise amplifier, and frequency mixing processing by a first mixer and a first oscillator on the air signal; and a substep 3026, obtaining the digital signal by sequentially performing filtering processing of the first filter, amplification processing of the first amplifier, and analog-to-digital conversion processing of the analog-to-digital converter on the intermediate frequency signal.
Preferably, the step 302 may further include: sub-step 3028 of controlling the selection of at least one filtering link and through link by means of a second switch and a third switch, one of said at least one filtering link and through link being selected as a connection link between said limiter and said low noise amplifier.
Further preferably, the step 302 may further include: sub-step 30210 of controlling the clipped air signal to enter the first mixer via a first switch.
In another preferable scheme of this embodiment, the step 306 may specifically include: substep 3062, receiving the emission modulation signal through a digital-to-analog converter, and converting the emission modulation signal into an analog signal; substep 3064, generating and mixing the analog signal through a second mixer and a second oscillator to obtain a premodulation interference signal; the frequency point of the pre-modulated interference signal is matched with an interference frequency point; substep 3066, obtaining the modulated interference signal after sequentially performing filtering processing of a second filter, amplification processing of a second amplifier and harmonic filtering processing of a passive filter on the pre-modulated interference signal; substep 3068, radiating the modulated interfering signal into the air via a second antenna.
Preferably, the step 306 further comprises: substep 30610, coupling the pre-modulated interference signal by a coupler arranged between the second amplifier and the passive filter to obtain a coupled signal; substep 30612, sending the coupled signal to the first mixer through the first switch.
Accordingly, the method further comprises: and 308, monitoring the coupling signals sequentially processed by the first mixer, the first filter, the first amplifier and the analog-to-digital converter through the programmable interference source module, and determining the output power of the transmitting link.
In another preferred aspect of this embodiment, the method may further include: step 310, generating a clock signal through a phase-locked loop, and sending the clock signal to the receiving link, the programmable interference source module, and the transmitting link, respectively, to implement synchronization of the signal interference apparatus.
In summary, in this embodiment, the receiving link may convert an aerial signal used for indicating the environmental condition of the interference area into a digital signal, and send the digital signal to the programmable interference source module, the programmable interference source module determines the environmental condition of the external interference area according to the digital signal, generates a transmission modulation signal adapted to the external environment, and finally, the transmission modulation signal is modulated and processed by the transmitting link and then radiated into the air, thereby achieving interference and shielding of the signal in the interference area. Therefore, in this embodiment, the signal interference device has adjustable power for different interference area ranges, and can generate corresponding effective interference sources for different communication system targets, thereby satisfying different application scenarios, and effectively realizing interference and shielding of terminal signals in various scenarios.
Secondly, in this embodiment, the working efficiency of the signal interference apparatus is improved by performing time division processing on the modulated interference signal. The receiving link is used for receiving the frequency band, the system and the power of the current environment, the current area needing interference is interfered in a targeted mode, the power amplifier is closed in the frequency band and the system which do not need interference, power consumption can be saved, and the effect of being green and energy-saving is achieved. And aiming at the working characteristics of various standard devices, only downlink interference is realized under the condition of effectively interfering the terminal, and the aim of not influencing the working of the base station is further achieved.
In addition, the transmitting link can be coupled to the receiving link through the coupler, and fault monitoring of the transmitting link is achieved.
It should be noted that the foregoing method embodiments are described as a series of acts or combinations for simplicity in explanation, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts or acts described, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The foregoing detailed description of a signal interference apparatus and method provided by the present invention has been presented, and the principles and embodiments of the present invention are explained by applying specific examples, and the descriptions of the above examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A signal jamming device, comprising:
the receiving link is used for receiving an air signal, converting the air signal into a digital signal and sending the digital signal to the programmable interference source module;
the programmable interference source module is used for desynchronizing the digital signal, determining the frequency band, the system and the power of the current interference area according to the desynchronizing processing result, generating a transmitting modulation signal matched with the environment of the current interference area in a targeted manner, and sending the transmitting modulation signal to a transmitting link;
the transmitting link is used for receiving the transmitting modulation signal, converting the transmitting modulation signal into a modulation interference signal and radiating the modulation interference signal to the air;
wherein the transmission link comprises: a coupler disposed between the second amplifier and the passive filter;
the coupler is used for coupling the amplified pre-modulated interference signal to obtain a coupled signal and sending the coupled signal to the first frequency mixer through the first switch;
correspondingly, the programmable interference source module is further configured to detect the output power of the transmission link according to the coupling signal processed by the first mixer, the first filter, the first amplifier, and the analog-to-digital converter in sequence.
2. The apparatus of claim 1, wherein the receive chain comprises: the digital-to-analog converter comprises a first antenna, a limiter, a low-noise amplifier, a first mixer, a first oscillator, a first filter, a first amplifier and a digital-to-analog converter;
a first antenna for receiving the aerial signal;
the amplitude limiter is used for carrying out amplitude limiting processing on the aerial signal;
the low-noise amplifier is used for carrying out low-noise amplification on the air signal after amplitude limiting processing;
the first frequency mixer is used for carrying out frequency conversion processing on the air signal after low-noise amplification according to the first local oscillation signal to obtain an intermediate frequency signal;
a first oscillator for generating the first local oscillation signal;
the first filter is used for filtering the intermediate frequency signal;
the first amplifier is used for amplifying the intermediate frequency signal after the filtering processing;
an analog-to-digital converter; and the intermediate frequency signal after the amplification processing is converted into the digital signal.
3. The apparatus of claim 2, wherein the receive chain further comprises: a first switch, a second switch, a third switch, and at least one of a filter link and a pass-through link;
wherein the content of the first and second substances,
the second switch and the third switch are used for controlling the selection of the at least one filtering link and the through link, and selecting one filtering link or one through link as a connecting link between the amplitude limiter and the low noise amplifier;
the first switch is used for controlling the air signal after the amplitude limiting processing to enter the first mixer.
4. The apparatus of claim 3, wherein the transmit chain comprises:
the digital-to-analog converter is used for receiving the transmitting modulation signal and converting the transmitting modulation signal into an analog signal;
the second frequency mixer is used for carrying out frequency mixing processing on the analog signal according to a second local oscillator signal to obtain a pre-modulation interference signal; the frequency point of the pre-modulated interference signal is matched with an interference frequency point;
the second oscillator is used for generating the second local oscillation signal;
the second filter is used for carrying out filtering processing on the pre-modulation interference signal;
the second amplifier is used for amplifying the pre-modulated interference signal after the filtering processing;
the passive filter is used for filtering harmonic waves in the amplified pre-modulated interference signals to obtain the modulated interference signals;
a second antenna for radiating the modulated interference signal into the air.
5. The apparatus of any of claims 1-4, further comprising: phase-locked loops respectively connected with the receiving link, the programmable interference source module and the transmitting link;
the phase-locked loop is used for generating a clock signal and respectively sending the clock signal to the receiving link, the programmable interference source module and the transmitting link so as to realize the synchronization of the signal interference device.
6. A signal interference method, comprising:
receiving an aerial signal through a receiving link, converting the aerial signal into a digital signal, and sending the digital signal to a programmable interference source module;
performing desynchronization processing on the digital signal through a programmable interference source module, determining the frequency band, the standard and the power of a current interference area according to a desynchronization processing result, generating a transmitting modulation signal matched with the environment of the current interference area in a targeted manner, and sending the transmitting modulation signal to a transmitting link;
receiving the transmitting modulation signal through a transmitting link, converting the transmitting modulation signal into a modulation interference signal, and radiating the modulation interference signal to the air;
wherein, the receiving the transmission modulation signal through the transmission link, converting the transmission modulation signal into a modulation interference signal, and radiating the modulation interference signal into the air, further comprises:
coupling the pre-modulation interference signal through a coupler arranged between the second amplifier and the passive filter to obtain a coupled signal;
sending the coupled signal to a first mixer through a first switch;
accordingly, the method further comprises: and monitoring the coupling signals processed by the first frequency mixer, the first filter, the first amplifier and the analog-to-digital converter in sequence through the programmable interference source module, and determining the output power of the transmitting link.
7. The method of claim 6, wherein receiving the over-the-air signal, converting the over-the-air signal to a digital signal, and sending the digital signal to a programmable interferer module, comprises:
receiving the aerial signal through a first antenna;
sequentially carrying out amplitude limiting processing of an amplitude limiter, low-noise amplification processing of a low-noise amplifier and mixing processing of a first mixer and a first oscillator on the air signal to obtain an intermediate frequency signal;
and sequentially carrying out filtering processing of a first filter, amplification processing of a first amplifier and analog-to-digital conversion processing of an analog-to-digital converter on the intermediate frequency signal to obtain the digital signal.
8. The method of claim 7, wherein receiving the over-the-air signal, converting the over-the-air signal to a digital signal, and sending the digital signal to a programmable interferer module, further comprises:
controlling selection of at least one filter link and a through link by a second switch and a third switch, one selected from the at least one filter link and through link being a connecting link between the limiter and the low noise amplifier;
and the number of the first and second groups,
and controlling the air signal after the amplitude limiting processing to enter the first mixer through a first switch.
9. The method of claim 8, wherein the receiving the transmission modulation signal through the transmission link, converting the transmission modulation signal into a modulation interference signal, and radiating the modulation interference signal into the air comprises:
receiving the transmitting modulation signal through a digital-to-analog converter, and converting the transmitting modulation signal into an analog signal;
generating and carrying out frequency mixing processing on the analog signal through a second frequency mixer and a second oscillator to obtain a pre-modulation interference signal; the frequency point of the pre-modulated interference signal is matched with an interference frequency point;
the pre-modulation interference signal is subjected to filtering processing of a second filter, amplification processing of a second amplifier and harmonic filtering processing of a passive filter in sequence to obtain the modulation interference signal;
radiating the modulated interference signal into the air through a second antenna.
10. The method according to any one of claims 6-9, further comprising:
and generating a clock signal through a phase-locked loop, and respectively sending the clock signal to the receiving link, the programmable interference source module and the transmitting link so as to realize the synchronization of the signal interference device.
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| CN201610675950.3A CN107769886B (en) | 2016-08-16 | 2016-08-16 | Signal interference device and method |
| PCT/CN2017/096469 WO2018032998A1 (en) | 2016-08-16 | 2017-08-08 | Signal interference apparatus and method |
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| CN109443098A (en) * | 2018-11-29 | 2019-03-08 | 西安爱生无人机技术有限公司 | Trap, system and method for unmanned plane |
| CN109782236B (en) * | 2019-02-27 | 2020-11-27 | 珠海格力电器股份有限公司 | Method and device for shielding data interaction by microwave radar |
| CN110572235B (en) * | 2019-09-16 | 2022-07-08 | 浙江三维通信科技有限公司 | Signal shielding device and method |
| CN111458684B (en) * | 2020-05-18 | 2020-11-24 | 北京航天长征飞行器研究所 | Two-point source coherent angle interference system and method |
| CN113708884B (en) * | 2020-05-22 | 2023-08-04 | 中国科学院信息工程研究所 | Forwarding interference method for illegal use of mobile terminal in confidential meeting place |
| CN111722255B (en) * | 2020-06-09 | 2022-08-26 | 上海交通大学 | Space-time modulation-based regional navigation positioning system and method |
| CN111970084B (en) * | 2020-07-08 | 2023-08-11 | 北京航天华腾科技有限公司 | Interference signal generation device, method and interference signal source equipment |
| CN111970082A (en) * | 2020-07-08 | 2020-11-20 | 北京航天华腾科技有限公司 | Interference signal generating device and interference signal source equipment |
| CN111970083B (en) * | 2020-07-08 | 2022-04-08 | 北京航天华腾科技有限公司 | Interference signal generating device and method and interference signal source equipment |
| CN111835368B (en) * | 2020-07-31 | 2022-11-18 | 海能达通信股份有限公司 | Zero intermediate frequency receiving system |
| CN111970066B (en) * | 2020-08-14 | 2022-08-02 | 浙江三维通信科技有限公司 | Power detection method and device, storage medium and electronic device |
| CN112202503B (en) * | 2020-09-22 | 2022-08-26 | 展讯通信（上海）有限公司 | Interference processing method, terminal equipment and computer readable storage medium |
| CN114441889B (en) * | 2022-04-02 | 2022-06-10 | 深圳市鼎阳科技股份有限公司 | Network analyzer, harmonic wave testing method and storage medium |
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| WO2018032998A1 (en) | 2018-02-22 |
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