Interference device and method based on frequency sweep triggering

Abstract

The application discloses a kind of interference equipment and method based on sweep frequency trigger, it is related to wireless communication technical field.The equipment includes: transceiving antenna;Power amplifier component;Radio frequency component, for receiving amplified current signal, and the amplified current signal is filtered and low-noise amplification, to obtain high-frequency reconnaissance signal, or, current signal received is sent to power amplifier component;Signal detection module, for sampling high-frequency reconnaissance signal, to obtain digital reconnaissance signal;Signal processing module, for the digital reconnaissance signal is down-converted and processed, to obtain baseband reconnaissance signal, and the circuit action trigger signal for being interfered with equipment based on baseband reconnaissance signal generated by signal generation module is sent to radio frequency component;Synthesis control module, for controlling signal generation module to generate circuit action trigger signal based on baseband reconnaissance signal.The application realizes more remote suppression target, discovers target and removes threat hidden danger and the like action purpose.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and specifically to an interference device and method based on frequency sweep triggering. Background Technology

[0002] With the rapid development of modern wireless communication technology, mobile phones, walkie-talkies, wireless remote controls, Wi-Fi (Wireless Fidelity), drones, and other wireless communication and remote control devices have become increasingly integrated into people's lives. At the same time, illegal and unethical activities using wireless communication and remote control devices are also on the rise, such as cheating in exams, leaking secrets in secure locations, and even using wireless remote control devices to manufacture remote-controlled bombs, disrupting social order and threatening public safety. Wireless frequency jammers are the primary equipment for dealing with such situations. They can suppress wireless communication and remote control reception in a certain area by using radio interference, and are widely used in exam rooms, conference venues, secure locations, and key military and police protected areas.

[0003] Existing wireless frequency jamming equipment typically employs conventional techniques based on radio reconnaissance and interference. These techniques can effectively shield electromagnetic signal propagation within an area, thus preventing remote wireless communication. However, jamming suppression technology only provides protection during the equipment's operational lifespan; it lacks the ability to detect, locate, and neutralize targets. Furthermore, jamming suppression technology must overcome the inherent anti-interference capabilities of the communication equipment itself. In other words, the stronger the anti-interference capability and the stronger the signal of the communication target, the more limited the jamming suppression capability and the smaller the effective range. Summary of the Invention

[0004] This invention addresses the shortcomings of conventional wireless frequency jammers, such as insufficient effective range and the ability to only temporarily suppress target wireless remote control devices. It provides a jamming device and method based on frequency sweep triggering, which achieves the objectives of suppressing targets at greater distances, detecting targets, and eliminating potential threats.

[0005] The present invention is achieved through the following technical solution.

[0006] In a first aspect, a frequency-sweep-triggered interference device is provided, the device comprising:

[0007] A transceiver antenna is used to convert received electromagnetic wave signals into current signals, and to convert received current signals into electromagnetic wave signals.

[0008] A power amplifier component, connected to the transceiver antenna, is used to amplify the received current signal;

[0009] A radio frequency component, connected to the power amplifier component, is used to receive an amplified current signal and filter and amplify the amplified current signal with low noise to obtain a high-frequency reconnaissance signal; or, to filter and amplify the received current signal with low noise and send it to the power amplifier component.

[0010] A signal detection module, connected to the radio frequency component, is used to sample the high-frequency reconnaissance signal to obtain a digital reconnaissance signal;

[0011] The signal processing module, connected to the signal receiving module and the radio frequency component respectively, is used to perform down-conversion processing on the digital reconnaissance signal to obtain a baseband reconnaissance signal; and to encode the circuit action trigger signal for the jammed device generated by the signal generation module based on the baseband reconnaissance signal and send it to the radio frequency component.

[0012] The integrated control module, connected to the signal processing module, is used to control the signal generation module to generate circuit action trigger signals for the interfered device based on the baseband reconnaissance signal.

[0013] In some embodiments, the circuit action trigger signal includes at least: an action trigger signal for a walkie-talkie squelch circuit having a known standard signal or an unknown signal, and / or an action trigger signal for a circuit in a wireless remote control device having an unknown signal.

[0014] In some embodiments, the signal generation module, in generating the action trigger signal of the walkie-talkie squelch circuit with a known standard signal, does not utilize the baseband reconnaissance signal but instead directly generates the transmission information using random signals and loads different types of analog / digital sub-tone signals into its waveform to generate the circuit action trigger signal.

[0015] In some embodiments, the action trigger signal for a walkie-talkie squelch circuit having a known standard signal includes: multiple modulation styles and multiple sub-tone encoding formats of the action trigger signal, and frequency sweeping and rotating transmission is performed at multiple frequency points within a predetermined frequency range.

[0016] In some embodiments, the action trigger signal for the squelch circuit of a walkie-talkie with unknown signals and the circuit in a wireless remote control device with unknown signals includes: action trigger signals with multiple modulation styles and multiple action encoding formats, and frequency sweeping and rotating transmission is performed at multiple frequency points within a predetermined frequency range.

[0017] In some embodiments, the signal processing module is further configured to: demodulate and decode the baseband reconnaissance signal to obtain time-domain waveform data of various action commands of the jammed device;

[0018] The integrated control module is also used to: control the signal generation module to reproduce the time-domain waveforms of various action commands of the interfered device based on the time-domain waveform data, as circuit action trigger signals.

[0019] In some embodiments, the signal processing module is further configured to: generate a transmission target data sample library based on the data stream transmitted by the jammed device through envelope detection, wherein the data sample library further includes: analog and digital walkie-talkie signals constructed based on standard protocols, and wireless remote control signals generated based on the chip parameter manual of the wireless remote control device;

[0020] The integrated control module is also used to: control the signal generation module to generate circuit action trigger signals based on the sample data in the data sample library.

[0021] Secondly, a frequency-sweep-triggered interference method is provided, the method comprising:

[0022] The system receives electromagnetic wave signals and converts them into current signals via a transceiver antenna, and also receives current signals and converts them into electromagnetic wave signals.

[0023] The current signal received from or transmitted to the transceiver antenna is amplified by a power amplifier component.

[0024] The current signal received from the power amplifier component is filtered and amplified with low noise using the radio frequency component to obtain a high-frequency detection signal; or the received current signal is filtered and amplified with low noise and then sent to the power amplifier component.

[0025] The high-frequency reconnaissance signal is sampled by the signal detection module to obtain a digital reconnaissance signal;

[0026] The digital reconnaissance signal is down-converted by the signal processing module to obtain a baseband reconnaissance signal; and the circuit action trigger signal for the jammed device generated by the signal generation module based on the baseband reconnaissance signal is encoded and sent to the radio frequency component.

[0027] The integrated control module controls the signal generation module to generate circuit action trigger signals for the interfered device based on the baseband reconnaissance signal.

[0028] In some embodiments, in generating an action trigger signal for a walkie-talkie squelch circuit with a known standard signal through the signal generation module, the baseband reconnaissance signal is not used; instead, random signals are used to directly generate the transmission information and load different types of analog / digital sub-tone signals into its waveform to generate the circuit action trigger signal.

[0029] In some embodiments, for the action trigger signals of the squelch circuit of a walkie-talkie with unknown signals and the circuit of a wireless remote control device with unknown signals, the signal processing module generates a transmission target data sample library by envelope detection based on the data stream transmitted by the jammed device. The data sample library further includes: analog and digital walkie-talkie signals constructed based on standard protocols, and wireless remote control signals generated based on the chip parameter manual of the wireless remote control device. The integrated control module controls the signal generation module to generate circuit action trigger signals based on the sample data in the data sample library.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects: by simulating and generating possible target wireless remote control signals, and by using a multi-signal, multi-frequency point rotation method, it sweeps the frequency to trigger possible target wireless remote control devices, thereby achieving the purpose of suppressing targets at a greater distance, detecting targets, and eliminating potential threats. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of an interference device based on frequency sweep triggering according to an embodiment of the present invention.

[0033] Figure 2 This is a diagram of a signal generation architecture according to an embodiment of the present invention.

[0034] Figure 3 This describes the walkie-talkie frequency sweep triggering workflow according to an embodiment of the present invention.

[0035] Figure 4 This describes the frequency sweep triggering process of a wireless remote control device according to an embodiment of the present invention.

[0036] Figure 5 This is a signal acquisition and forwarding control process for unknown signals according to an embodiment of the present invention.

[0037] Figure 6 This is a framework diagram of the acquisition and forwarding generation of frequency sweep signals according to an embodiment of the present invention.

[0038] Figure 7 This is a flowchart of an interference method based on frequency sweep triggering according to an embodiment of the present invention.

[0039] Figure 8This is a baseband waveform diagram according to an embodiment of the present invention.

[0040] Figure 9 This is a schematic diagram of the frequency sweep trigger clock signal and the frequency sweep trigger signal spectrum according to an embodiment of the present invention.

[0041] Figure 10 This is a field diagram of a frequency sweep triggering test according to an embodiment of the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0043] On the one hand, the present invention provides an interference device based on frequency sweep triggering. Figure 1 This is a schematic diagram of a frequency-triggered interference device according to an embodiment of the present invention. (Reference) Figure 1 The interference device based on frequency sweep triggering includes: a transceiver antenna, a power amplifier component, a radio frequency component, a signal detection module, a signal processing module, and a comprehensive control module.

[0044] refer to Figure 1 A transceiver antenna is used to receive electromagnetic wave signals and convert them into current signals, and to convert received current signals into electromagnetic wave signals.

[0045] The power amplifier component, connected to the transceiver antenna, is used to amplify the received current signal.

[0046] The radio frequency component, connected to the power amplifier component, is used to receive the amplified current signal and filter and amplify the amplified current signal with low noise to obtain a high-frequency reconnaissance signal; or, to filter and amplify the received current signal with low noise and send it to the power amplifier component.

[0047] The signal acquisition module, connected to the radio frequency components, is used to sample high-frequency reconnaissance signals to obtain digital reconnaissance signals.

[0048] The signal processing module, connected to the signal receiving module and the radio frequency component respectively, is used to down-convert the digital reconnaissance signal to obtain the baseband reconnaissance signal; and to encode the circuit action trigger signal for the jammed device generated by the signal generation module based on the baseband reconnaissance signal and send it to the radio frequency component.

[0049] The integrated control module, connected to the signal processing module, is used to control the signal generation module to generate circuit action trigger signals for the jammed device based on the baseband reconnaissance signal.

[0050] In addition, the jamming device also includes a power supply module, which provides operating voltage to each unit module in the jamming device.

[0051] In the hardware architecture of the entire jamming device, the signal detection module receives the analog high-frequency reconnaissance signal sent by the radio frequency component and uses the ADC (analog-to-digital converter) to perform high-frequency (radio frequency) sampling on the analog high-frequency reconnaissance signal.

[0052] The signal processing module down-converts the digital reconnaissance signal to obtain the baseband reconnaissance signal. The baseband reconnaissance signal is in I / Q data stream format. Based on the baseband reconnaissance signal, the integrated control module and the control signal generation module generate circuit action trigger signals for the jammed equipment.

[0053] The signal processing module also receives parameter configurations and walkie-talkie voice information (or random signals) from the integrated control module, performs corresponding signal encoding and digital-to-analog conversion processing, generates circuit action trigger signals for the walkie-talkie and wireless remote control device, and outputs them to the radio frequency (RF) component. The RF component filters and amplifies the received signals with low noise before loading them onto the carrier wave. The power amplifier component amplifies the received RF signals and finally outputs them to the antenna unit to complete signal transmission. The power supply module is a general-purpose module that converts external AC 220V to generate the DC 12V and 28V power supplies required by each functional module.

[0054] The signal generation module generates circuit action trigger signals for the jammed device based on baseband reconnaissance signals. The hardware architecture of the signal generation module employs Software-Defined Radio (SDR), using frequency control words to scan different waveforms and modulation information. The SDR device directly transmits I / Q data streams between the host computer software and the SDR device (implemented via an FPGA (Field-Programmable Gate Array)). Based on this architecture, the SDR transceiver system achieves both the traditional direct transmission of I / Q data streams and the utilization of the system's FPGA resources for I / Q data processing.

[0055] refer to Figure 2Both the signal processing and signal generation modules can be implemented in the FPGA. The FPGA, as the core of the software-defined radio transceiver, is responsible for the data processing and status control of the entire transceiver system. The MicroBlaze module consists of a MicroBlaze soft-core processor, BRAM (Block Random Access Memory), an SPI (Serial Peripheral Interface) controller, and a GPIO (General Purpose Input / Output) controller. The soft-core processor is programmed in C language and manages the entire transceiver system. It configures the registers of the clock generator and distributor via the SPI bus, sets the frequency division and multiplication parameters of the internal phase-locked loop, and reads the lock status. It also sets the sampling rate, center frequency, digital filter coefficients, gain parameters, and link parameters of the DAC (Digital-to-Analog Converter) via the SPI bus, controls the start and stop of the transceiver link, and reads the lock status and link connection status of the internal phase-locked loop.

[0056] The DMA (Direct Memory Access) module is used to transfer sampled data between the host computer and the jamming device. Two sampled data transmission methods are designed. One is based on the PCIe (Peripheral Component Interconnect) bus, using the Xilinx XDMA IP core. The sampled data is buffered in an asynchronous FIFO (First-In-First-Out) manner and then input through the AXI Stream interface provided by the IP core to DMA the sampled data to the host computer. The other is based on 10 Gigabit Ethernet data transmission. The sampled data is first packaged into UDP frames by the UDP (User Datagram Protocol) module, then packaged into Ethernet data frames by the Ethernet module, and finally transmitted through optical fiber. The signal processing module uses the FPGA's internal logic resources for modulation and demodulation, digital frequency conversion, and filtering. Software for generating the frequency control word of the walkie-talkie signal sweep waveform is designed and implemented within the FPGA, and the signal is shaped and filtered. The host computer software (integrated control module) is responsible for generating the coded control signal for the walkie-talkie sub-tone and the control data stream for the frequency sweep.

[0057] In some embodiments, the circuit action trigger signal includes at least: an action trigger signal for a walkie-talkie squelch circuit having a known standard signal (explicit encoding format) or an unknown signal (non-explicit encoding format), and / or an action trigger signal for a circuit in a wireless remote control device having an unknown signal.

[0058] In this invention, the target signals for the jammed device triggered by wireless frequency sweep can be broadly divided into two categories: known standard signals and unknown signals. The working modes of the two types of targets differ in terms of their mechanism of action.

[0059] For known standard signals, such as walkie-talkie signals, based on the signal system (modulation method, carrier frequency), a transmission signal of the same standard can be generated according to publicly available protocol standards. This signal is then transmitted in a narrowband pattern within the target system's operating frequency band, performing a frequency-stepping scan to ensure that the transmitted signal matches the target walkie-talkie's operating frequency at a certain moment, thus triggering a response from the target receiver and achieving the purpose of frequency sweep triggering. Therefore, refer to... Figure 3 In (a) of this invention, the signal generation module, in generating the action trigger signal for the walkie-talkie squelch circuit with a known standard signal, does not utilize baseband reconnaissance signals but instead directly generates transmission information using random signals and loads different types of analog / digital sub-tone signals into its waveform to generate the circuit action trigger signal. (See reference...) Figure 3 In (b), the interfered device receives the circuit activation trigger signal, and after filtering, amplifying and demodulating it, obtains a sub-tone signal. It then compares the sub-tone signal with its own sub-tone signal. If they match, the squelch circuit is triggered; otherwise, the signal is discarded.

[0060] To achieve scanning triggering of walkie-talkies targeting unknown targets, it is necessary to use a transceiver antenna to cyclically scan and send wireless signals that can be received, parsed, and have their squelch circuit activated by the walkie-talkie on its commonly used frequency points.

[0061] The key to achieving scan-triggered functionality on a walkie-talkie lies in ensuring that the scanned trigger signal is received, correctly interpreted, and activates the squelch circuit on the receiving walkie-talkie. From Figure 3 As shown in (b), the signal frequency, modulation style, and sub-tone encoding must all be consistent (matching the jammed device) to correctly trigger the corresponding action of the target receiver. The signal frequency is triggered by sweeping the commonly used frequency points of the walkie-talkie's working channel. The modulation style, for analog FM / AM modes, can be achieved by loading a standard FM / AM modulation / demodulation protocol stack. However, for digitally encoded walkie-talkies, since Europe, America, and China use different standards, the internationally accepted mainstream standards DMR (Digital Mobile Radio) and PDT (Police Digital Trunking) can be temporarily used, with basic protocol conversion achieved through standard DMR and PDT codecs. For the squelch circuit, during standby and intermittent communication, the walkie-talkie's low-frequency amplifier is automatically locked, preventing noise from being output from the speaker or headphones; when a signal is input, the lockout is quickly released, allowing the signal to be output via the low-frequency amplifier. This ensures clear and loud voice reception while effectively solving the problem of playback noise. Therefore, to implement walkie-talkie frequency sweep triggering technology, the main technical points are:

[0062] a) Universality: In order to meet the scanning triggering of mainstream walkie-talkies, it is necessary to simulate the waveform characteristics of multiple types of walkie-talkies as much as possible and load different types of sub-tone modulation information;

[0063] b) Agility: The walkie-talkie communication signal frequency band to be scanned is relatively wide. Based on a 25kHz interval, the system needs to scan more than 4,000 walkie-talkie channels; and on each walkie-talkie channel, more than 140 groups of sub-tone modulation need to be implemented.

[0064] c) Waveform accuracy: Because walkie-talkie waveforms have different standard types, different types of walkie-talkies have different signal waveform characteristics. The signal transmitter needs to scan according to different waveforms. If the scanning speed is too fast, it will cause waveform distortion, which will lead to decoding or sub-tone errors, resulting in trigger failure. Therefore, the signal dwell time and scanning rate need to be verified through experiments.

[0065] Therefore, based on the above analysis, the action trigger signal for the squelch circuit of a walkie-talkie with a known standard signal includes: action trigger signals with multiple modulation styles and multiple sub-tone encoding formats, and frequency sweeping and rotating transmission is performed at multiple frequency points within a predetermined frequency range.

[0066] For unknown signals, such as those from wireless remote control devices and some walkie-talkies, which are typically analog circuits made with low-cost MCUs (microcontroller units), there is no unified and clear protocol standard. The signals from various remote control devices employ multiple signal patterns depending on the chip they use; therefore, frequency sweeping triggering cannot be performed using methods that generate remote control signals according to a protocol. Therefore, this invention employs a signal reconnaissance and reception, or store-and-forward method.

[0067] For signal reconnaissance and reception methods, environmental electromagnetic spectrum reconnaissance is used to identify potential threat remote control signals based on signal frequency and characteristics. These signals are collected and stored in a characteristic signal database. By cyclically transmitting signals based on these potential targets, the target receiver is triggered. To achieve pre-triggered wireless remote control devices, the transmission frequency of the jamming device must match the receiving frequency of the wireless remote control device, and the jamming device's receiver must be able to correctly decode the signal to initiate the corresponding triggering action. (Reference) Figure 5 and Figure 4In (a), after receiving the signal, the jamming device filters and amplifies it, then collects and sorts it to obtain baseband signals (signal samples) and stores them in a data sample library. This data sample library also includes analog and digital walkie-talkie signals constructed based on standard protocols, and wireless remote control signals generated based on remote control chip parameter manuals. The integrated control module, based on the sample data in the data sample library, controls the signal generation module to generate circuit action trigger signals. The signal generation module also encodes the circuit action trigger signals to form corresponding waveforms, which are then mixed, amplified, and transmitted via the antenna. (Reference) Figure 4 In step (b), the interfered device receives the signal, filters, amplifies, and demodulates it, and then decodes it. If the signal is successfully matched, an action is triggered; otherwise, it is discarded.

[0068] Based on the above analysis, it is clear that the interference signal transmitted by the jamming device must match the signal frequency, modulation style, and action code of the jammed device in order to correctly trigger the action of the receiver of the jammed device. Therefore, the action triggering signals for the squelch circuit of a walkie-talkie with unknown signals and the circuit in a wireless remote control device with unknown signals include: action triggering signals with multiple modulation styles and multiple action code formats, and frequency sweeping and rotating transmission at multiple frequency points within a predetermined frequency range.

[0069] In some embodiments, the signal processing module is further configured to: demodulate and decode the baseband reconnaissance signal to obtain time-domain waveform data of various action commands of the jammed device; the integrated control module is further configured to: control the signal generation module to reproduce the time-domain waveforms of various action commands of the jammed device based on the time-domain waveform data, as circuit action trigger signals.

[0070] Specifically, frequency modulation (FM) signal demodulation technology based on envelope detection can be used to perform analog demodulation and data analysis on the signals of the wireless remote control device, acquiring the data stream transmitted during target remote control and generating a target data sample library for the wireless remote control device. During scan triggering, the data in the sample library is used to generate a scan signal. The data sample library can be continuously enriched through extensive signal acquisition. Simultaneously, signal waveforms can be designed based on commonly used wireless remote control chip datasheets, and a software-defined radio architecture signal generation platform can generate scan signals of corresponding frequencies according to the chip data encoding format. Overall, the richness and completeness of the sample library determine the success probability of frequency scan triggering, and enriching the sample library is a continuous, long-term, and cumulative process.

[0071] In this invention, by simulating and generating possible target wireless remote control signals, and by using a multi-signal, multi-frequency point rotation method, frequency sweeping triggers possible target wireless remote control devices, thereby achieving the purpose of suppressing targets at a greater distance, detecting targets, and eliminating potential threats.

[0072] On the other hand, the present invention provides an interference method based on frequency sweep triggering. Figure 7 This is a flowchart of an interference method based on frequency sweep triggering according to an embodiment of the present invention. (Reference) Figure 7 The interference method based on frequency sweep triggering includes: S10 to S60.

[0073] In S10, electromagnetic wave signals are received and converted into current signals via a transceiver antenna, and current signals are received and converted into electromagnetic wave signals.

[0074] In S20, the current signal received from or transmitted to the transceiver antenna is amplified by a power amplifier component.

[0075] In S30, the current signal received from the power amplifier component is filtered and amplified with low noise using the radio frequency component to obtain a high-frequency reconnaissance signal; or, the received current signal is filtered and amplified with low noise and then sent to the power amplifier component.

[0076] In the S40, the high-frequency reconnaissance signal is sampled by the signal receiving module to obtain the digital reconnaissance signal.

[0077] In S50, the digital reconnaissance signal is down-converted by the signal processing module to obtain the baseband reconnaissance signal; and the circuit action trigger signal for the jammed device generated by the signal generation module based on the baseband reconnaissance signal is encoded and sent to the radio frequency component.

[0078] In S60, the integrated control module generates circuit action trigger signals for the jammed device based on the baseband reconnaissance signal and the control signal generation module.

[0079] In some embodiments, in generating an action trigger signal for a walkie-talkie squelch circuit with a known standard signal through a signal generation module, instead of using a baseband reconnaissance signal, a random signal is used to directly generate the transmission information and load different types of analog / digital sub-tone signals into its waveform to generate the circuit action trigger signal.

[0080] In some embodiments, for the action trigger signals of the squelch circuit of a walkie-talkie with unknown signals and the circuit of a wireless remote control device with unknown signals, the signal processing module generates a transmission target data sample library by envelope detection based on the data stream transmitted by the jammed device. The data sample library also includes: analog and digital walkie-talkie signals constructed based on standard protocols, and wireless remote control signals generated based on the chip parameter manual of the wireless remote control device. The integrated control module controls the signal generation module to generate circuit action trigger signals based on the sample data in the data sample library.

[0081] For further implementation details of this frequency-sweep-triggered jamming method, please refer to the description of the frequency-sweep-triggered jamming device above, which will not be repeated here.

[0082] The interference scheme of the present invention will be verified and explained through specific application examples below.

[0083] In the laboratory, we completed the design work for the remote control receiver frequency sweep triggering principle prototype, remote control triggering fixture, frequency sweep interference waveform, and other related work for the PT8A977 / PT8A978 encoding chip. We also conducted preliminary simulation verification tests in an outdoor demonstration test environment.

[0084] The baseband waveforms were automatically generated using Gray code to produce nine different encoding specifications for baseband control signals, ranging from 8 to 16 bits in length. The time-domain waveforms covered at least 90% of the encoded codewords. The baseband time-domain and RF waveforms of the frequency sweep trigger waveform are shown. Figure 8 As shown in (a) and (b).

[0085] For signal frequency sweep triggering, a high-precision clock is used for control. Since the data rate of the 26MHz-28MHz frequency sweep trigger signal is low, the dwell time of a single frequency sweep trigger signal is 2-6ms, and a 10ms signal interval can be used for triggering. Different trigger signals are emitted on each different rising edge of the clock. The clock signal and the frequency sweep trigger signal are as follows: Figure 9 As shown in (a) and (b).

[0086] A device for generating frequency sweep trigger signals, based on an outdoor simulated environment, is installed inside an interference transmitter vehicle. Figure 10 (a) , for analog remote control receiver ( Figure 10 A frequency sweep triggering test was conducted in (b) of the test, and the results are shown in Table 1.

[0087] Table 1. Sweep Frequency Trigger Signal Test Record Table

[0088]

[0089] The above verification results show that the frequency sweep triggering technology can not only achieve a high triggering success rate, but also has a sufficiently long effective range, which is much greater than the effective range of wireless interference suppression.

[0090] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An interference device based on frequency sweep triggering, characterized in that, The device includes: A transceiver antenna is used to convert received electromagnetic wave signals into current signals, and to convert received current signals into electromagnetic wave signals. A power amplifier component, connected to the transceiver antenna, is used to amplify the received current signal; A radio frequency component, connected to the power amplifier component, is used to receive an amplified current signal and filter and amplify the amplified current signal with low noise to obtain a high-frequency reconnaissance signal; or, to filter and amplify the received current signal with low noise and send it to the power amplifier component. A signal detection module, connected to the radio frequency component, is used to sample the high-frequency reconnaissance signal to obtain a digital reconnaissance signal; The signal processing module, connected to the signal receiving module and the radio frequency component respectively, is used to perform down-conversion processing on the digital reconnaissance signal to obtain a baseband reconnaissance signal; and to encode the circuit action trigger signal for the jammed device generated by the signal generation module based on the baseband reconnaissance signal and send it to the radio frequency component. The integrated control module, connected to the signal processing module, is used to control the signal generation module to generate circuit action trigger signals for the interfered device based on the baseband reconnaissance signal.

2. The device according to claim 1, characterized in that, The circuit action trigger signal includes at least: an action trigger signal for a walkie-talkie squelch circuit having a known standard signal or an unknown signal, and / or an action trigger signal for a circuit in a wireless remote control device having an unknown signal.

3. The device according to claim 2, characterized in that, In generating the action trigger signal for the walkie-talkie squelch circuit with a known standard signal, the signal generation module does not use the baseband reconnaissance signal but instead uses a random signal to directly generate the transmission information and loads different types of analog / digital sub-tone signals into its waveform to generate the circuit action trigger signal.

4. The device according to claim 3, characterized in that, The action trigger signal for the squelch circuit of a walkie-talkie with a known standard signal includes: action trigger signals with multiple modulation styles and multiple sub-tone encoding formats, and frequency sweeping and rotating transmission is performed at multiple frequency points within a predetermined frequency range.

5. The device according to claim 2, characterized in that, Action trigger signals for the squelch circuit of a walkie-talkie with unknown signals and the circuit in a wireless remote control device with unknown signals include: action trigger signals with multiple modulation styles and multiple action encoding formats, and frequency sweeping and rotating transmission is performed at multiple frequency points within a predetermined frequency range.

6. The device according to claim 5, characterized in that, The signal processing module is also used to demodulate and decode the baseband reconnaissance signal to obtain time-domain waveform data of various action commands of the jammed device; The integrated control module is also used to: control the signal generation module to reproduce the time-domain waveforms of various action commands of the interfered device based on the time-domain waveform data, as circuit action trigger signals.

7. The device according to claim 5, characterized in that, The signal processing module is also used to: generate a transmission target data sample library based on the data stream transmitted by the jammed device through envelope detection, wherein the data sample library also includes: analog and digital walkie-talkie signals constructed based on standard protocols, and wireless remote control signals generated based on the chip parameter manual of the wireless remote control device. The integrated control module is also used to: control the signal generation module to generate circuit action trigger signals based on the sample data in the data sample library.

8. An interference method based on frequency sweep triggering, characterized in that, The method includes: The system receives electromagnetic wave signals and converts them into current signals via a transceiver antenna, and also receives current signals and converts them into electromagnetic wave signals. The current signal received from or transmitted to the transceiver antenna is amplified by a power amplifier component. The current signal received from the power amplifier component is filtered and amplified with low noise using the radio frequency component to obtain a high-frequency detection signal; or the received current signal is filtered and amplified with low noise and then sent to the power amplifier component. The high-frequency reconnaissance signal is sampled by the signal detection module to obtain a digital reconnaissance signal; The digital reconnaissance signal is down-converted by the signal processing module to obtain a baseband reconnaissance signal; and the circuit action trigger signal for the jammed device generated by the signal generation module based on the baseband reconnaissance signal is encoded and sent to the radio frequency component. The integrated control module controls the signal generation module to generate circuit action trigger signals for the interfered device based on the baseband reconnaissance signal.

9. The method according to claim 8, characterized in that, In generating the action trigger signal of the walkie-talkie squelch circuit with a known standard signal through the signal generation module, the baseband reconnaissance signal is not used. Instead, random signals are used to directly generate the transmission information and load different types of analog / digital sub-tone signals into its waveform to generate the action trigger signal of the circuit.

10. The method according to claim 8, characterized in that, For the action trigger signals of walkie-talkie squelch circuits with unknown signals and wireless remote control devices with unknown signals, the signal processing module generates a transmission target data sample library by envelope detection based on the data stream transmitted by the jammed device. The data sample library also includes: analog and digital walkie-talkie signals constructed based on standard protocols, and wireless remote control signals generated based on the chip parameter manual of the wireless remote control device. The integrated control module controls the signal generation module to generate circuit action trigger signals based on the sample data in the data sample library.

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