System for realizing 5G multi-channel intelligent interference based on rapid frequency sweep analysis

Abstract

The invention relates to a system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis, which comprises a clock synchronization unit, a fast frequency sweep analysis unit, a deception signal simulation unit, a reference clock distribution unit and a digital signal processing unit, the output end of the clock synchronization unit is connected with the input end of the digital signal processing unit, the rapid frequency sweeping analysis unit is connected with a radio frequency receiving antenna, and the output end of a clock of an FPGA of the digital signal processing unit is connected with the input end of the reference clock distribution unit. By adopting the system for realizing 5G multi-channel intelligent interference based on rapid frequency sweeping analysis, deception suppression of the 5G terminal is realized, low-power interference and control of the resident network capability of the interfered terminal can be realized, and a portable and long-endurance interference solution is provided for various types of secret-related and management and control scenes.

Description

Technical Field

[0001] This invention relates to the field of 5G wireless communication, and more particularly to the field of 5G wireless communication security and protection, specifically to a system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis. Background Technology

[0002] With the development of wireless communication such as 5G, significant challenges have been posed to communication security. In some special locations and scenarios, the need to suppress communication interference is becoming increasingly urgent, such as police checkpoints.

[0003] Schools, examination rooms, and other venues will impose necessary restrictions on wireless communication. Domestic and foreign institutions have carried out a lot of research on this, and it has gradually become a research hotspot in the field of wireless communication security applications.

[0004] Traditional wireless signal jamming devices suppress high-power signals by scanning signal sources or by collecting and replaying data. This approach is ineffective against communication systems with strong anti-interference capabilities, such as 5G and OFDM, and prolonged exposure to high-power transmitters can be harmful to humans. This invention rapidly scans different 5G frequency bands to quickly identify the strongest cell PCI in each band. It then reconstructs the base station signal of the strongest cell PCI in each band by modifying higher-layer protocol signaling and transmits it through multiple parallel channels to suppress and deceive 5G terminals. This innovative jamming signal design and strategy development achieve low-power jamming and control over the network access capabilities of the jammed terminal, providing a portable and long-lasting jamming solution for various types of classified and control scenarios. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a system for achieving 5G multi-channel intelligent interference based on fast frequency sweep analysis that is portable, has long battery life, and is widely applicable.

[0006] To achieve the above objectives, the present invention provides a system for implementing 5G multi-channel intelligent interference based on fast frequency sweep analysis as follows: The system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis is characterized by the following: the system includes a clock synchronization unit, a fast frequency sweep analysis unit, a spoofing signal simulation unit, a reference clock allocation unit, and a digital signal processing unit. The input terminal of the clock synchronization unit is connected to the navigation satellite system antenna, and the output terminal of the clock synchronization unit is connected to the input terminal of the digital signal processing unit. The fast frequency sweep analysis unit is connected to the radio frequency receiving antenna and also to the input terminal of the digital signal processing unit. The digital signal processing unit includes an FPGA, and the clock output terminal of the FPGA is connected to the input terminal of the reference clock allocation unit. The output terminal of the reference clock allocation unit is connected to the clock input terminal of the eight-channel digital-to-analog converter of the spoofing signal simulation unit. The receiving end of the clock synchronization unit collects data from the start position of the wireless frame, and the transmitting end of the clock synchronization unit transmits a base station signal synchronized with the base station; the fast frequency sweep analysis unit quickly scans different 5G frequency bands, and obtains IQ data at different frequency points by switching the local oscillator in steps with the 5G subcarrier bandwidth; the spoofing signal simulation unit is used to transmit and reconstruct the strongest cell signal of different 5G frequency bands, interfere with the 5G terminal to disconnect its link from the base station, and make the terminal no longer camp by transmitting spoofing signals; the reference clock allocation unit is used to provide a fully synchronized sampling clock for the receiving channel and different transmitting channels; the digital signal processing unit is used to analyze the data collected by the digital-to-analog converter, and analyze the PCI of the strongest cell in different frequency bands to reconstruct the baseband signal of the strongest cell in different frequency bands. The deception signal simulation unit includes four dual-channel digital-to-analog converters (DACs): a first dual-channel DAC, a second dual-channel DAC, a third dual-channel DAC, and a fourth dual-channel DAC. Each dual-channel DAC includes two input terminals and two output terminals, and each dual-channel DAC corresponds to two transmission channels. Therefore, the deception signal simulation unit includes eight transmission channels: a first transmission channel, a second transmission channel, a third transmission channel, a fourth transmission channel, a fifth transmission channel, a sixth transmission channel, a seventh transmission channel, and an eighth transmission channel. The first dual-channel DAC corresponds to the first and second transmission channels, the second dual-channel DAC corresponds to the third and fourth transmission channels, the third dual-channel DAC corresponds to the fifth and sixth transmission channels, and the fourth dual-channel DAC corresponds to the seventh and eighth transmission channels. The output terminals of the first and third dual-channel DACs are connected to a digital signal processing unit, and the input terminals of the second and fourth dual-channel DACs are connected to the digital signal processing unit. Each transmit channel includes a reconstructed low-pass filter, an IQ modulator, a band-pass filter, a digitally controlled attenuator, an amplifier, and a power amplifier. The analog IQ output of the dual-channel digital-to-analog converter is connected to the input of the reconstructed low-pass filter. The output of the reconstructed low-pass filter is connected to the input of the IQ modulator, used to output signals at any frequency point within the frequency band. The output of the IQ modulator is connected to the input of the digitally controlled attenuator through the band-pass filter, used to automatically adjust the signal output power. The output of the digitally controlled attenuator is connected to the input of the amplifier, used to compensate for channel loss. The output of the amplifier is connected to the input of the power amplifier, used to ensure effective interference distance.

[0007] Preferably, the receiving end of the clock synchronization unit takes the rising edge of the second pulse as the starting position for the analog-to-digital converter baseband data acquisition, acquires baseband IQ data and calculates it as an interference signal to disconnect the terminal. The eight transmission channel ports use the rising edge of the second pulse as a reference to calibrate the time transmission delay of N microseconds for different channels, so as to synchronize the time of different transmission channels. The rising edge of the same second pulse is used as the starting position for the transmission of the deception and interference superimposed signal.

[0008] Preferably, the fast frequency sweep resolution unit includes a first low-noise amplifier, a filter bank, a second low-noise amplifier, a first mixer, a first bandpass filter, a second mixer, a second bandpass filter, an intermediate frequency amplifier, a broadband IQ demodulator, and an anti-aliasing filter. The output of the first low-noise amplifier is connected to the filter bank, and the input of the second low-noise amplifier is connected to the filter bank for amplifying the received signal. The output of the second low-noise amplifier is connected to the first mixer bank, and the input of the first bandpass filter is connected to the first mixer bank for improving the signal strength of the received signal. The signal quality is improved by: the output of the first bandpass filter being connected to the second mixer, and the input of the second bandpass filter being connected to the second mixer to suppress out-of-band spurious signals; the output of the second bandpass filter being connected to the input of the intermediate frequency amplifier, and the input of the broadband IQ demodulator being connected to the output of the intermediate frequency amplifier to improve the intermediate frequency gain and signal-to-noise ratio; the output of the broadband IQ demodulator being connected to the input of the anti-aliasing filter to improve the demodulation quality of the 5G signal; and the output of the anti-aliasing filter being connected to the input of the analog-to-digital converter via a differential interface.

[0009] Preferably, the passband bandwidths of the bandpass filters of the second, third, fourth, fifth, sixth, seventh, and eighth transmission channels of the deception signal simulation unit are 1805MHz~1915MHz, 2010MHz~2155MHz, 2300MHz~2390MHz, 3300MHz~3400MHz, 3400MHz~3600MHz, 2515MHz~2675MHz, and 4800MHz~5000MHz, respectively.

[0010] Preferably, the reference clock distribution unit includes a clock distributor, the input of which is connected to the clock output of the FPGA, and the output of which is connected to the input of the four dual-channel digital-to-analog converters of the spoofing signal simulation unit, and also to the clock input of the IQ modulator of the eight transmit channels of the spoofing signal simulation unit.

[0011] Preferably, the digital signal processing unit further includes a USB and an ARM. The FPGA is connected to the clock synchronization unit, the fast frequency sweep analysis unit, the spoofing signal simulation unit, and the reference clock allocation unit, respectively. The FPGA is connected to the ARM, and the ARM is connected to the USB. The USB is used to control external devices. The ARM is used to run device calibration algorithms and calibrate data storage. The FPGA is used to analyze the data collected by the digital-to-analog converter, parse the cell number of the strongest cell PCI in different frequency bands, store the data collected from the start point of the radio frame, and reconstruct the 5G baseband signal of the strongest cell in different frequency bands.

[0012] This invention employs a system for intelligent 5G multi-channel interference based on rapid frequency scanning and analysis. By quickly scanning different 5G frequency bands, it rapidly analyzes and identifies the strongest cell PCI (Potential Cell Identity) in each band. It then reconstructs the base station signal of the strongest cell PCI in each band by modifying higher-layer protocol signaling and transmits it through multiple parallel channels to suppress and deceive 5G terminals. The system features innovative interference signal design and interference strategy development, achieving low-power interference and control over the network access capabilities of the interfered terminal. It provides a portable and long-lasting interference solution for various types of classified and controllable scenarios. Through the design of the above scheme, this system provides effective interference and suppression methods for radio control examination support and security agencies. Attached Figure Description

[0013] Figure 1 This is a block diagram illustrating the principle of the system for implementing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to the present invention.

[0014] Figure 2 This is a schematic diagram of the clock synchronization unit of the system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to the present invention.

[0015] Figure 3 This is a schematic diagram of the fast frequency sweeping analysis unit of the system for realizing 5G multi-channel intelligent interference based on fast frequency sweeping analysis according to the present invention.

[0016] Figure 4 This is a schematic diagram of the deception signal simulation unit of the system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to the present invention.

[0017] Figure 5 This is a schematic diagram of the reference clock allocation unit of the system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to the present invention.

[0018] Figure 6 This is a schematic diagram of the digital signal processing unit of the system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to the present invention. Detailed Implementation

[0019] To more clearly describe the technical content of the present invention, the following description is provided in conjunction with specific embodiments.

[0020] The present invention discloses a system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis, comprising a clock synchronization unit, a fast frequency sweep analysis unit, a spoofing signal simulation unit, a reference clock allocation unit, and a digital signal processing unit. The input terminal of the clock synchronization unit is connected to the navigation satellite system antenna, and the output terminal of the clock synchronization unit is connected to the input terminal of the digital signal processing unit. The fast frequency sweep analysis unit is connected to the radio frequency receiving antenna and also to the input terminal of the digital signal processing unit. The digital signal processing unit includes an FPGA, and the clock output terminal of the FPGA is connected to the input terminal of the reference clock allocation unit. The output terminal of the reference clock allocation unit is connected to the clock input terminal of the eight-channel digital-to-analog converter of the spoofing signal simulation unit. The receiving end of the clock synchronization unit collects data from the start position of the wireless frame, and the transmitting end of the clock synchronization unit transmits a base station signal synchronized with the base station; the fast frequency sweep analysis unit quickly scans different 5G frequency bands, and obtains IQ data at different frequency points by switching the local oscillator in steps with the 5G subcarrier bandwidth; the spoofing signal simulation unit is used to transmit and reconstruct the strongest cell signal of different 5G frequency bands, interfere with the 5G terminal to disconnect its link from the base station, and make the terminal no longer camp by transmitting spoofing signals; the reference clock allocation unit is used to provide a fully synchronized sampling clock for the receiving channel and different transmitting channels; the digital signal processing unit is used to analyze the data collected by the digital-to-analog converter, and analyze the PCI of the strongest cell in different frequency bands to reconstruct the baseband signal of the strongest cell in different frequency bands. The deception signal simulation unit includes four dual-channel digital-to-analog converters (DACs): a first dual-channel DAC, a second dual-channel DAC, a third dual-channel DAC, and a fourth dual-channel DAC. Each dual-channel DAC includes two input terminals and two output terminals, and each dual-channel DAC corresponds to two transmission channels. Therefore, the deception signal simulation unit includes eight transmission channels: a first transmission channel, a second transmission channel, a third transmission channel, a fourth transmission channel, a fifth transmission channel, a sixth transmission channel, a seventh transmission channel, and an eighth transmission channel. The first dual-channel DAC corresponds to the first and second transmission channels, the second dual-channel DAC corresponds to the third and fourth transmission channels, the third dual-channel DAC corresponds to the fifth and sixth transmission channels, and the fourth dual-channel DAC corresponds to the seventh and eighth transmission channels. The output terminals of the first and third dual-channel DACs are connected to a digital signal processing unit, and the input terminals of the second and fourth dual-channel DACs are connected to the digital signal processing unit. Each transmit channel includes a reconstructed low-pass filter, an IQ modulator, a band-pass filter, a digitally controlled attenuator, an amplifier, and a power amplifier. The analog IQ output of the dual-channel digital-to-analog converter is connected to the input of the reconstructed low-pass filter. The output of the reconstructed low-pass filter is connected to the input of the IQ modulator, used to output signals at any frequency point within the frequency band. The output of the IQ modulator is connected to the input of the digitally controlled attenuator through the band-pass filter, used to automatically adjust the signal output power. The output of the digitally controlled attenuator is connected to the input of the amplifier, used to compensate for channel loss. The output of the amplifier is connected to the input of the power amplifier, used to ensure effective interference distance.

[0021] In a preferred embodiment of the present invention, the receiving end of the clock synchronization unit takes the rising edge of the second pulse as the starting position for the baseband data acquisition of the analog-to-digital converter, acquires the baseband IQ data and calculates it as an interference signal to disconnect the terminal. The eight transmission channel ports use the rising edge of the second pulse as a reference to calibrate the time transmission delay of N microseconds for different channels, so as to synchronize the time of different transmission channels. The rising edge of the same second pulse is used as the starting position for the transmission of the deception and interference superimposed signal.

[0022] In a preferred embodiment of the present invention, the fast frequency sweep analysis unit includes a first low-noise amplifier, a filter bank, a second low-noise amplifier, a first mixer, a first bandpass filter, a second mixer, a second bandpass filter, an intermediate frequency amplifier, a broadband IQ demodulator, and an anti-aliasing filter. The output terminal of the first low-noise amplifier is connected to the filter bank, and the input terminal of the second low-noise amplifier is connected to the filter bank for amplifying the received signal. The output terminal of the second low-noise amplifier is connected to the first mixer bank, and the input terminal of the first bandpass filter is connected to the first mixer bank for amplifying the received signal. To improve the quality of small-signal signals; the output of the first bandpass filter is connected to the second mixer, and the input of the second bandpass filter is connected to the second mixer to suppress out-of-band spurious signals; the output of the second bandpass filter is connected to the input of the intermediate frequency amplifier, and the input of the broadband IQ demodulator is connected to the output of the intermediate frequency amplifier to improve the intermediate frequency gain and signal-to-noise ratio; the output of the broadband IQ demodulator is connected to the input of the anti-aliasing filter to improve the demodulation quality of 5G signals; the output of the anti-aliasing filter is connected to the input of the analog-to-digital converter through a differential interface.

[0023] In a preferred embodiment of the present invention, the passband bandwidths of the bandpass filters of the second, third, fourth, fifth, sixth, seventh, and eighth transmission channels of the deception signal simulation unit are 1805MHz~1915MHz, 2010MHz~2155MHz, 2300MHz~2390MHz, 3300MHz~3400MHz, 3400MHz~3600MHz, 2515MHz~2675MHz, and 4800MHz~5000MHz, respectively.

[0024] In a preferred embodiment of the present invention, the reference clock distribution unit includes a clock distributor. The input terminal of the clock distributor is connected to the clock output terminal of the FPGA. The output terminal of the clock distributor is connected to the input terminals of the four dual-channel digital-to-analog converters of the spoofing signal simulation unit, and is also connected to the clock input terminal of the IQ modulator of the eight transmission channels of the spoofing signal simulation unit.

[0025] In a preferred embodiment of the present invention, the digital signal processing unit further includes a USB and an ARM. The FPGA is connected to the clock synchronization unit, the fast frequency sweep analysis unit, the spoofing signal simulation unit, and the reference clock allocation unit, respectively. The FPGA is connected to the ARM, and the ARM is connected to the USB. The USB is used to control external devices, the ARM is used to run device calibration algorithms and calibrate data storage, and the FPGA is used to analyze the data collected by the digital-to-analog converter, parse the cell number of the strongest cell PCI in different frequency bands, store the data collected from the start point of the radio frame, and reconstruct the 5G baseband signal of the strongest cell in different frequency bands.

[0026] In specific embodiments of the present invention, such as Figure 1 As shown, a 5G multi-channel intelligent jamming system based on fast frequency sweep analysis includes a clock synchronization unit, a fast frequency sweep analysis unit, a spoofing signal simulation unit, a reference clock allocation unit, and a digital signal processing unit. The GNSS (Navigation Satellite System) antenna is connected to the input of the digital signal processing unit through the clock synchronization unit. The radio frequency receiving antenna is connected to the input of the digital signal processing unit through the fast frequency sweep analysis unit. The clock output of the FPGA (Programmable Gate Array) of the digital signal processing unit is connected to the input of the reference clock allocation unit. The output of the reference clock allocation unit is connected to the input of the analog-to-digital converter of the fast frequency sweep analysis unit and the clock input of the eight-channel digital-to-analog converter of the spoofing signal simulation unit.

[0027] The aforementioned 5G multi-channel intelligent jamming system based on fast frequency sweep analysis includes a clock synchronization unit used by the receiving end to collect data from the start position of the wireless frame and by the transmitting end to transmit base station signals synchronized with the base station. The processing procedure is as follows: (1) The signal receiving end uses the rising edge of the second pulse as the starting position for the ADC baseband data acquisition, and acquires 20ms baseband IQ data for calculation and as an interference signal to disconnect the terminal.

[0028] (2) The eight transmit channel ports are used to calibrate the time transmission delay of N microseconds for different channels based on the rising edge of the second pulse, ensuring time synchronization of different transmit channels. The rising edge of the same second pulse serves as the starting position for transmitting the deception and interference superimposed signal. A delay of 4 microseconds is recommended for N, which provides the best deception effect.

[0029] like Figure 3 As shown, the 5G multi-channel intelligent interference system based on fast frequency sweep analysis uses a fast frequency sweep analysis unit to quickly scan different 5G frequency bands. It acquires IQ data at different frequency points by switching the local oscillator in steps of 30kHz 5G subcarrier bandwidth. The processing procedure is as follows: (1) The output terminal of the first low noise amplifier and the input terminal of the second low noise amplifier are connected to the input terminal and the output terminal of the filter bank, respectively. The amplification gain of the first low noise amplifier and the second low noise amplifier is 15dB, which is used to amplify the received signal while reducing noise. The passband bandwidth of the filter bank is designed as F1: 0.65-1GHz, F2: 1-2GHz, F3: 2-2.7GHz, F4: 2.7-3.4GHz, F5: 3.4-3.8GHz, F6: 3.8-6GHz. In order to ensure the passband filtering of the 3GPP 5G standard frequency band and the private network non-standard frequency band, suppress out-of-band interference, and improve the signal-to-noise ratio.

[0030] (2) The output of the second low-noise amplifier and the input of the first bandpass filter are both connected to the input and output of the first mixer. The first mixer has its own local oscillator with an output intermediate frequency of 1185MHz and a local oscillator phase noise of 130dBc to ensure the quality of small signal signals. The bandwidth of the bandpass filter is 100MHz to ensure full RB resolution of 5G signals.

[0031] (3) The output of the first bandpass filter and the input of the second bandpass filter are respectively connected to the input and output of the second mixer. The second mixer has its own local oscillator with an output intermediate frequency of 140MHz and a local oscillator phase noise of 130dBc to ensure the quality of small signal signals. The bandwidth of the bandpass filter is 100MHz to suppress out-of-band spurious signals.

[0032] (4) The output of the second bandpass filter and the input of the broadband IQ demodulator are connected to the input and output of the intermediate frequency amplifier, respectively. The intermediate frequency amplification gain is 15dB, which is intended to improve the intermediate frequency gain and the signal-to-noise ratio.

[0033] (5) The output of the broadband IQ demodulator is connected to the input of the anti-aliasing filter. The anti-aliasing filter is a low-pass filter with a 1dB bandwidth of 50MHz and an in-band flatness of ±0.2dB. This is to ensure the demodulation quality of the 5G signal.

[0034] (6) The output of the anti-aliasing filter is connected to the input of the analog-to-digital converter (ADC) through a differential interface. The ADC has 14 effective bits and a sampling rate of 245.76 Mbps, which ensures that the receiving channel reduces the degradation of 5G signal quality.

[0035] like Figure 4 As shown, the 5G multi-channel intelligent interference system based on fast frequency sweep analysis uses a deception signal simulation unit to transmit and reconstruct the strongest cell signals of different 5G frequency bands to interfere with 5G terminals, causing them to disconnect from the base station. Simultaneously, by transmitting deception signals, the system deceives the 5G terminal into believing that the current base station is fully loaded while the terminal is camped in the cell, forcing the terminal to leave the cell. The processing procedure is as follows: (1) The analog IQ output of the first dual-channel digital-to-analog converter (DAC) of the first transmission channel is connected to the input of the first reconstructed low-pass filter. The 1dB bandwidth of the first reconstructed low-pass filter is 50MHz, the in-band flatness is ±0.5dB, the effective number of bits of the digital-to-analog converter (DAC) is 16 bits, the sampling rate is 122.88Mbps, and full RB transmission is guaranteed.

[0036] (2) The output of the first reconstructed low-pass filter is connected to the input of the first IQ modulator. The first IQ modulator has its own local oscillator and the modulation output range is 758MHz~960MHz, ensuring signal output at any frequency point in this frequency band.

[0037] (3) The output of the first IQ modulator is connected to the input of the first digitally controlled attenuator through the first bandpass filter. The adjustable gain range of the digitally controlled attenuator is 0 to 30 dB, which aims to automatically adjust the signal output power.

[0038] (4) The output of the first digitally controlled attenuator is connected to the input of the first amplifier. The gain of the first amplifier is 15dB, which is to compensate for channel loss.

[0039] (5) The output of the first amplifier is connected to the input of the power amplifier. A 2W fixed gain power amplifier is used to ensure an effective interference distance of 20 meters.

[0040] (6) Repeat steps (1) to (5) for the second, third, fourth, fifth, sixth, seventh and eighth transmission channels. The output frequency range of the IQ modulator and the passband bandwidth of the bandpass filter are 1805MHz~1915MHz, 2010MHz~2155MHz, 2300MHz~2390MHz, 3300MHz~3400MHz, 3400MHz~3600MHz, 2515MHz~2675MHz, and 4800MHz~5000MHz, respectively, covering all the frequency bands used by existing operators.

[0041] The spoofing signal simulation unit includes four dual-channel digital-to-analog converters (DACs): a first dual-channel DAC, a second dual-channel DAC, a third dual-channel DAC, and a fourth dual-channel DAC. The spoofing signal simulation unit also includes eight transmission channels: a first transmission channel, a second transmission channel, a third transmission channel, a fourth transmission channel, a fifth transmission channel, a sixth transmission channel, a seventh transmission channel, and an eighth transmission channel. The first dual-channel DAC corresponds to the first and second transmission channels; the second dual-channel DAC corresponds to the third and fourth transmission channels; the third dual-channel DAC corresponds to the fifth and sixth transmission channels; and the fourth dual-channel DAC corresponds to the seventh and eighth transmission channels. The outputs of the first and third dual-channel DACs are connected to a digital signal processing unit, and the inputs of the second and fourth dual-channel DACs are connected to the digital signal processing unit.

[0042] The aforementioned 5G multi-channel intelligent jamming system based on fast frequency sweep analysis includes a reference clock allocation unit used to provide a fully synchronized sampling clock for the receiving channel and different transmitting channels. The processing procedure is as follows: (1) The clock output of the FPGA is connected to the input of the clock distributor, and the reference clock is 122.88MHz.

[0043] (2) The output of the clock distributor is connected to the clock input of the four-channel DAC and the clock input of the eight-channel IQ modulator respectively to ensure that the clocks are from the same source and have the same phase, and the output clock rate is 122.88MHz.

[0044] like Figure 6 As shown, the 5G multi-channel intelligent interference system based on fast frequency sweep analysis includes a digital signal processing unit that rapidly analyzes data collected by the digital-to-analog converter (ADC), quickly identifies the strongest cell PCI (cell ID) in different frequency bands, stores background noise data collected from the start of the radio frame to deceive the signal, and reconstructs the baseband signal of the strongest cell in different frequency bands to deceive the 5G terminal and prevent it from camping normally. The processing procedure is as follows: (1) USB: Used for external device control.

[0045] (2) ARM: Used for device calibration algorithm operation, calibration data storage, and local reference data storage.

[0046] (3) FPGA: Quickly analyze the data collected by the digital-to-analog converter (ADC), quickly parse out the PCI (cell number) of the strongest cell in different frequency bands, and store the data collected from the start point of the radio frame to deceive the background noise data of the signal. At the same time, it reconstructs the 5G baseband signal of the strongest cell in different frequency bands.

[0047] For the specific implementation scheme of this embodiment, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0048] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0049] It should be noted that in the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means at least two.

[0050] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] This invention employs a system for intelligent 5G multi-channel interference based on rapid frequency scanning and analysis. By quickly scanning different 5G frequency bands, it rapidly analyzes and identifies the strongest cell PCI (Potential Cell Identity) in each band. It then reconstructs the base station signal of the strongest cell PCI in each band by modifying higher-layer protocol signaling and transmits it through multiple parallel channels to suppress and deceive 5G terminals. The system features innovative interference signal design and interference strategy development, achieving low-power interference and control over the network access capabilities of the interfered terminal. It provides a portable and long-lasting interference solution for various types of classified and controllable scenarios. Through the design of the above scheme, this system provides effective interference and suppression methods for radio control examination support and security agencies.

[0052] In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis, characterized in that, The system includes a clock synchronization unit, a fast frequency sweep and analysis unit, a spoofing signal simulation unit, a reference clock allocation unit, and a digital signal processing unit. The input of the clock synchronization unit is connected to the navigation satellite system antenna, and the output of the clock synchronization unit is connected to the input of the digital signal processing unit. The fast frequency sweep and analysis unit is connected to the radio frequency receiving antenna and also to the input of the digital signal processing unit. The digital signal processing unit includes an FPGA. The clock output of the FPGA is connected to the input of the reference clock allocation unit, and the output of the reference clock allocation unit is connected to the clock input of the eight-channel digital-to-analog converter of the spoofing signal simulation unit. The receiving end of the clock synchronization unit collects data from the start position of the wireless frame, and the transmitting end of the clock synchronization unit transmits a base station signal synchronized with the base station; the fast frequency sweep analysis unit quickly scans different 5G frequency bands, and obtains IQ data at different frequency points by switching the local oscillator in steps with the 5G subcarrier bandwidth; the spoofing signal simulation unit is used to transmit and reconstruct the strongest cell signal of different 5G frequency bands, interfere with the 5G terminal to disconnect its link from the base station, and make the terminal no longer camp by transmitting spoofing signals; the reference clock allocation unit is used to provide a fully synchronized sampling clock for the receiving channel and different transmitting channels; the digital signal processing unit is used to analyze the data collected by the digital-to-analog converter, and analyze the PCI of the strongest cell in different frequency bands to reconstruct the baseband signal of the strongest cell in different frequency bands. The deception signal simulation unit includes four dual-channel digital-to-analog converters (DACs): a first dual-channel DAC, a second dual-channel DAC, a third dual-channel DAC, and a fourth dual-channel DAC. Each dual-channel DAC includes two input terminals and two output terminals, and each dual-channel DAC corresponds to two transmission channels. Therefore, the deception signal simulation unit includes eight transmission channels: a first transmission channel, a second transmission channel, a third transmission channel, a fourth transmission channel, a fifth transmission channel, a sixth transmission channel, a seventh transmission channel, and an eighth transmission channel. The first dual-channel DAC corresponds to the first and second transmission channels, the second dual-channel DAC corresponds to the third and fourth transmission channels, the third dual-channel DAC corresponds to the fifth and sixth transmission channels, and the fourth dual-channel DAC corresponds to the seventh and eighth transmission channels. The output terminals of the first and third dual-channel DACs are connected to a digital signal processing unit, and the input terminals of the second and fourth dual-channel DACs are connected to the digital signal processing unit. Each transmit channel includes a reconstructed low-pass filter, an IQ modulator, a band-pass filter, a digitally controlled attenuator, an amplifier, and a power amplifier. The analog IQ output of the dual-channel digital-to-analog converter is connected to the input of the reconstructed low-pass filter. The output of the reconstructed low-pass filter is connected to the input of the IQ modulator, used to output signals at any frequency point within the frequency band. The output of the IQ modulator is connected to the input of the digitally controlled attenuator through the band-pass filter, used to automatically adjust the signal output power. The output of the digitally controlled attenuator is connected to the input of the amplifier, used to compensate for channel loss. The output of the amplifier is connected to the input of the power amplifier, used to ensure effective interference distance.

2. The system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to claim 1, characterized in that, The receiving end of the clock synchronization unit takes the rising edge of the second pulse as the starting position for the analog-to-digital converter baseband data acquisition, acquires baseband IQ data and calculates it as an interference signal to disconnect the terminal. The eight transmission channel ports use the rising edge of the second pulse as a reference to calibrate the time transmission delay of N microseconds for different channels, so as to synchronize the time of different transmission channels. The rising edge of the same second pulse is used as the starting position for the transmission of the deception and interference superimposed signal.

3. The system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to claim 1, characterized in that, The fast frequency sweep analysis unit includes a first low-noise amplifier, a filter bank, a second low-noise amplifier, a first mixer, a first bandpass filter, a second mixer, a second bandpass filter, an intermediate frequency amplifier, a broadband IQ demodulator, and an anti-aliasing filter. The output of the first low-noise amplifier is connected to the filter bank, and the input of the second low-noise amplifier is connected to the filter bank for amplifying the received signal. The output of the second low-noise amplifier is connected to the first mixer bank, and the input of the first bandpass filter is connected to the first mixer bank for improving small-signal signal strength. The signal quality is as follows: the output of the first bandpass filter is connected to the second mixer, and the input of the second bandpass filter is connected to the second mixer to suppress out-of-band spurious signals; the output of the second bandpass filter is connected to the input of the intermediate frequency amplifier, and the input of the broadband IQ demodulator is connected to the output of the intermediate frequency amplifier to improve the intermediate frequency gain and signal-to-noise ratio; the output of the broadband IQ demodulator is connected to the input of the anti-aliasing filter to improve the demodulation quality of the 5G signal; the output of the anti-aliasing filter is connected to the input of the analog-to-digital converter via a differential interface.

4. The system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to claim 1, characterized in that, The passband bandwidths of the bandpass filters of the second, third, fourth, fifth, sixth, seventh, and eighth transmission channels of the deception signal simulation unit are 1805MHz~1915MHz, 2010MHz~2155MHz, 2300MHz~2390MHz, 3300MHz~3400MHz, 3400MHz~3600MHz, 2515MHz~2675MHz, and 4800MHz~5000MHz, respectively.

5. The system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to claim 1, characterized in that, The reference clock distribution unit includes a clock distributor. The input of the clock distributor is connected to the clock output of the FPGA. The output of the clock distributor is connected to the input of the four dual-channel digital-to-analog converters of the spoofing signal simulation unit, and also to the clock input of the IQ modulator of the eight transmit channels of the spoofing signal simulation unit.

6. The system for realizing 5G multi-channel intelligent interference based on fast frequency sweep analysis according to claim 1, characterized in that, The digital signal processing unit also includes a USB and an ARM. The FPGA is connected to the clock synchronization unit, the fast frequency sweep analysis unit, the spoofing signal simulation unit, and the reference clock allocation unit. The FPGA is connected to the ARM, and the ARM is connected to the USB. The USB is used to control external devices. The ARM is used to run device calibration algorithms and calibrate data storage. The FPGA is used to analyze the data collected by the digital-to-analog converter, parse the cell number of the strongest cell PCI in different frequency bands, store the data collected from the start point of the radio frame, and reconstruct the 5G baseband signal of the strongest cell in different frequency bands.

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