CN210693954U - Base station signal interference device - Google Patents
Base station signal interference device Download PDFInfo
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- CN210693954U CN210693954U CN202020121345.3U CN202020121345U CN210693954U CN 210693954 U CN210693954 U CN 210693954U CN 202020121345 U CN202020121345 U CN 202020121345U CN 210693954 U CN210693954 U CN 210693954U
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Abstract
The utility model discloses a base station signal interference device, including casing, central processing unit, signal receiving unit, signal transmitting unit, man-machine interface unit and power supply unit, central processing unit, signal receiving unit, signal transmitting unit and power supply unit all fix in the casing, man-machine interface unit fixes on the casing, central processing unit is connected with signal receiving unit, signal transmitting unit, man-machine interface unit and power supply unit respectively; the signal receiving unit is used for collecting downlink signals transmitted by the base station, and the central processing unit modulates downlink analog interference signals according to the downlink signals and controls the signal transmitting unit to transmit the downlink analog interference signals. The utility model discloses simple structure, convenient to use can carry out effective interference to the regional basic station signal of locating.
Description
Technical Field
The utility model relates to an information security technical field especially relates to a basic station signal interference device, and mainly used disturbs the down signal of basic station.
Background
At present, the domestic mobile phone jammers are mainly divided into two types, namely signal suppression and signal adsorption, which are based on isolating signals of a mobile phone and a base station, and the two types of jammers have different principles and are specifically distinguished as follows:
1. the signal adsorption means that the equipment emits the signal of the virtual base station to trick the communication between the mobile phone and the virtual base station, thereby achieving the purpose of isolating the mobile phone from the base station.
2. The interference of the mobile phone is carried out by the principle of signal suppression, and the interference is divided into two types by the difference of interference signals, wherein the most common method is to generate the interference signals with certain bandwidth by VCO frequency sweeping, and carry out the interference by signal amplification. However, as the existing wireless spectrum resources are more and more tense, the frequency spectrum allocated to each industry according to the requirements is more and more refined, and the frequency intervals among different frequency bands are more and more narrow. Especially, the wide application of the same frequency time division communication (LTE-TDD) makes the frequency-sweeping type interference suppressor generate interference to adjacent frequency bands and interference to uplink signals of the base station, which easily causes communication breakdown of the base station. Meanwhile, the frequency spectrum utilization rate of the sweep frequency interference is low, the interference efficiency is low, and the electromagnetic radiation pollution is easily caused.
The prior document with publication number CN101123762 discloses an environment-friendly mobile signal shielding method and device in 2008, 2/13, and the technical scheme is as follows: the mobile phone frequency band signal detection, judgment control and shielding signal emission are carried out, a detection part detects a mobile phone frequency band signal, an uplink signal and a downlink signal are distinguished, an out-of-band signal and the downlink signal are filtered and sent to a judgment control part, the detected signal forms high and low levels through an amplifying circuit and a detection circuit and is sent to a CPU, the frequency band of the detected signal is judged, and a control signal is output; the shielding signal transmitting part receives the output signal of the CPU to control the relay to operate, so that the corresponding power transmitting module works, an interference signal is generated within a specified time, and the measured frequency is shielded. The technology only starts to play a role when a mobile phone signal is received, each frequency band is independently controlled and does not interfere with each other, the starting time of the mobile signal shielding instrument is shortened within the range of the maximum limit, and the purpose of environmental protection is achieved. However, the following defects still exist in the practical application: 1, due to the inherent characteristic that the switching times of the relay are limited, the problem of uplink and downlink time-sharing interference of communication of a TDD system cannot be solved. 2, the technology carries out whole-segment interference on the frequency band, and cannot achieve the interference effect of frequency points to frequency points, and the interference effect is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome the above-mentioned problem that exists among the prior art, disclose a base station signal interference device, the utility model discloses simple structure, convenient to use can carry out effective interference to the regional base station signal of locating.
In order to achieve the above object, the utility model adopts the following technical scheme:
a base station signal interference apparatus, comprising: the intelligent monitoring system comprises a shell, a central processing unit, a signal receiving unit, a signal transmitting unit, a man-machine interface unit and a power supply unit, wherein the central processing unit, the signal receiving unit, the signal transmitting unit and the power supply unit are all fixed in the shell; the signal receiving unit is used for collecting downlink signals transmitted by the base station, and the central processing unit modulates downlink analog interference signals according to the downlink signals and controls the signal transmitting unit to transmit the downlink analog interference signals.
And a wireless communication module connected with the central processing unit is also arranged in the shell.
The signal receiving unit comprises a receiving antenna, a first multiplexer, a second multiplexer and a plurality of filter amplifiers, the receiving antenna is connected with the input end of the first multiplexer, the plurality of filter amplifiers are respectively connected with the output end of the first multiplexer and the input end of the second multiplexer, and the output end of the second multiplexer is connected with the central processing unit; the receiving antenna is used for acquiring downlink signals and sending the acquired downlink signals to the first multiplexer, the first multiplexer is used for sending the downlink signals of different frequency bands to the plurality of filter amplifiers respectively for filtering and amplifying, and the second multiplexer is used for sequentially outputting the filtered and amplified downlink signals to the central processing unit.
The central processing unit comprises a signal processing module, an FPGA control module and an interference signal simulation generator, the signal processing module is respectively connected with the second multiplexer and the FPGA control module, and the interference signal simulation generator is respectively connected with the signal transmitting unit and the FPGA control module; the signal processing module is used for demodulating the downlink signal after filtering and amplifying, and the FPGA control module is used for modulating the downlink analog interference signal and controlling the interference signal analog generator to generate the downlink analog interference signal.
The signal transmitting unit comprises a plurality of transmitting channels for transmitting downlink analog interference signals in a frequency division range, each transmitting channel comprises a signal amplifier for performing gain adjustment and a transmitting antenna for transmitting the downlink analog interference signals, the signal amplifier is connected with the interference signal analog generator, and the transmitting antenna is connected with the signal amplifier.
The shell is of a square structure.
The back of the shell is provided with a hanging fastener.
The shell comprises a bottom shell and a cover shell, and the bottom shell and the cover shell are fixed through screws.
Adopt the utility model has the advantages of:
1. the utility model discloses mainly constitute by central processing unit, signal reception unit, signal transmission unit, man-machine interface unit and power supply unit, and central processing unit, signal reception unit, signal transmission unit and power supply unit all fix in the casing, consequently have advantages such as simple structure, convenient to use. And because the central processing unit modulates the downlink analog interference signal according to the downlink signal of the base station and controls the signal transmitting unit to transmit the downlink analog interference signal, narrow-band point-frequency interference can be performed on the communication signal of the base station in a targeted manner, specifically, a narrow-band frequency spectrum almost completely consistent with a radiation signal can be generated during interference, and an electromagnetic radiation frequency spectrum for digital information transmission is covered, so that the interference efficiency is improved, the pollution of the electromagnetic signal to the environment is reduced, and the normal communication of a mobile terminal outside a shielding region is not influenced. In addition, in an environment with complex signals, it is difficult to automatically set a proper output power, which causes an undesirable interference effect, so that the device can work in a manual mode through the man-machine interface unit, and the power output gear of the device is adjusted to be optimal, thereby achieving the optimal interference effect.
2. The utility model discloses still be provided with the wireless communication module who is connected with central processing unit in the casing, through wireless communication module, can be before gathering down signal, whether there is interference equipment of the same type in the region that is located through wireless communication module detection by central processing unit earlier, if there is, then send the instruction that stops to launch down simulation interference signal to interference equipment of the same type by central processing unit, then treat this central processing unit and modulate out down simulation interference signal after, launch down simulation interference signal with other interference equipment of the same type simultaneously again. Through the wireless communication module, the interference protection in coordination can be carried out with other interference equipment of the same type when the interference equipment of the same type exists, the shielding blind area is swept, and the interference effect is further improved.
3. The signal receiving unit in the utility model comprises a receiving antenna, a first multiplexer, a second multiplexer and a plurality of filter amplifiers, wherein the receiving antenna is connected with the input end of the first multiplexer, the plurality of filter amplifiers are respectively connected with the output end of the first multiplexer and the input end of the second multiplexer, and the output end of the second multiplexer is connected with the central processing unit; the structure has the advantages that firstly, the information leakage can be effectively prevented, secondly, the equipment cost can be effectively reduced, and the equipment volume is reduced.
4. The central processing unit in the utility model comprises a signal processing module, an FPGA control module and an interference signal simulation generator which are connected in sequence, wherein the signal processing module can demodulate the downlink signal after filtering and amplifying, and the FPGA control module can modulate the downlink simulation interference signal and control the interference signal simulation generator to generate the downlink simulation interference signal; the central processing unit adopting the structure can effectively generate the downlink analog interference signal for interference. Meanwhile, all the devices are unified and normalized, and the stability and the practicability of the interference device are favorably improved.
5. The utility model provides a signal transmission unit includes the multichannel sub-band transmission downlink analog interference signal's transmission channel, and every way transmission channel includes a signal amplifier that is used for carrying out gain adjustment and a transmitting antenna that is used for transmitting downlink analog interference signal. The signal transmitting unit adopting the structure can perform gain adjustment on downlink analog interference signals of different frequency bands, so that the signal intensity of the downlink analog interference signals is greater than that of downlink signals transmitted by the base station; and the downlink signals of different frequency bands can be transmitted simultaneously, so that the communication between the mobile terminal and the base station is effectively cut off, and the aim of effectively preventing information leakage is fulfilled.
6. The utility model discloses intensity, characteristics, the law according to basic station communication principle and basic station radiation signal carry out the general consideration design, effectively solved the technical problem such as the inefficiency that frequency sweep interference brought, electromagnetic pollution is big, be difficult to carry out high-efficient shielding to the basic station signal.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic block diagram of the present invention;
fig. 3 is a schematic block diagram of a signal receiving unit according to the present invention;
FIG. 4 is a functional block diagram of a CPU according to the present invention;
fig. 5 is a schematic block diagram of the signal transmitting unit of the present invention.
Detailed Description
Example 1
The embodiment discloses a base station signal interference device, which comprises a shell, a central processing unit, a signal receiving unit, a signal transmitting unit, a wireless communication module, a man-machine interface unit and a power supply unit, wherein the central processing unit, the signal receiving unit, the wireless communication module, the signal transmitting unit and the power supply unit are all fixed in the shell; the signal receiving unit is used for collecting downlink signals transmitted by the base station, and the central processing unit modulates downlink analog interference signals according to the downlink signals and controls the signal transmitting unit to transmit the downlink analog interference signals.
In this embodiment, the signal receiving unit includes a receiving antenna, a first multiplexer, a second multiplexer, and a plurality of filter amplifiers, the receiving antenna is connected to an input end of the first multiplexer, the plurality of filter amplifiers are respectively connected to an output end of the first multiplexer and an input end of the second multiplexer, and an output end of the second multiplexer is connected to the central processing unit; the receiving antenna is used for acquiring downlink signals and sending the acquired downlink signals to the first multiplexer, the first multiplexer is used for sending the downlink signals of different frequency bands to the plurality of filter amplifiers respectively for filtering and amplifying, and the second multiplexer is used for sequentially outputting the filtered and amplified downlink signals to the central processing unit.
In this embodiment, the central processing unit includes a signal processing module, an FPGA control module, and an interference signal simulation generator, the signal processing module is connected to the second multiplexer and the FPGA control module, and the interference signal simulation generator is connected to the signal transmitting unit and the FPGA control module; the signal processing module is used for demodulating the downlink signal after filtering and amplifying, and the FPGA control module is used for modulating the downlink analog interference signal and controlling the interference signal analog generator to generate the downlink analog interference signal. The central processing unit controls the sequential signals generated by the FPGA and controls the ordered working state of the whole equipment. In the initial period of operation, the base station signal from the signal receiving unit is detected, and the modulation signal of the analog base station is generated by combining the signal environment of the equipment field through demodulation processing.
In this embodiment, the signal transmitting unit includes multiple transmitting channels for transmitting the downlink analog interference signal in multiple frequency division bands, each transmitting channel includes a signal amplifier for performing gain adjustment and a transmitting antenna for transmitting the downlink analog interference signal, the signal amplifier is connected to the interference signal analog generator, and the transmitting antenna is connected to the signal amplifier. When interference is carried out, the multi-channel transmitting channels simultaneously transmit downlink analog interference signals of different frequency bands so as to ensure effective interference of the signals.
In this embodiment, the power supply unit supplies power to the central processing unit, and is connected to the signal receiving unit and the signal transmitting unit through the central processing unit, and the power supply unit supplies power to the signal receiving unit and the signal transmitting unit in a time-sharing power supply manner. The man-machine interface unit can provide an upper computer signal for the central processing unit, and can adjust the power output gear of the equipment to be optimal manually, so that the signal isolation of the mobile terminal reaches the optimal state.
In this embodiment, the wireless communication module is configured to detect whether there are interference devices of the same type in an area where the wireless communication module is located during use, and if there is an interference device of the same type in the area, the wireless communication module performs networking, and after networking, the central processing unit sends an instruction to stop transmitting the downlink analog interference signal to the interference devices of the same type, and then after the central processing unit modulates the downlink analog interference signal, the wireless communication module transmits the downlink analog interference signal simultaneously with the other interference devices of the same type. Therefore, the signals of the located area can be effectively shielded, automatic networking synchronization and cooperative interference protection are carried out on the same type of interferers, and the shielding blind area is swept away. Specifically, when the device is started to work, the device firstly sends an instruction signal to be worked through the wireless communication module and by using the special wireless communication network, if the area has interference devices with the same type, the device immediately stops sending the interference signal after receiving the instruction signal, and then sends the interference signal with the interference devices with the same type after receiving the base station signal.
In this embodiment, when receiving the base station signal, the signal receiving unit analyzes the synchronization signal of the base station, distinguishes the uplink and downlink signals of the base station, and sends the signal to the signal transmitting unit, so as to achieve the purpose of only interfering with the downlink signal of the base station. And the emission of the downlink analog interference signal is preferably synchronous with the downlink signal emitted by the base station, so that the electromagnetic pollution is effectively reduced while the interference effect is met. In addition, when the interference is carried out on the base station signal, the equipment generates a narrow-band frequency spectrum almost completely consistent with the radiation signal according to the electromagnetic radiation characteristic of digital information transmission, covers the electromagnetic radiation frequency spectrum of the digital information transmission, implements point-frequency interference in a targeted manner, improves the interference efficiency and reduces the pollution of the electromagnetic signal to the environment.
In this embodiment, the receiving antenna and the transmitting antenna are printed antennas designed by self-development, and the signal amplifier is designed by chip self-development and has a model number of HTN7G27S010P (HUANTAI ELECTRONICS LTD). The model of the FPGA control module is XC6SEX75 (XILINX). The model of the signal processing module is XC7Z100 (XILINX). The filter amplifier employs a family of crystal filters, such as TA0394 (TAI-SAW).
The implementation principle of the embodiment is as follows:
1. the downlink signals transmitted by the base station in the area are collected through the receiving antenna, after the downlink signals are collected, the collected downlink signals are processed in a frequency division section, namely the downlink signals in different frequency bands are distinguished, then the first multiplexer and the plurality of filter amplifiers are used for respectively carrying out filtering amplification processing on the downlink signals in different frequency bands, and finally the downlink signals after filtering amplification are sequentially output to the central processing unit through the second multiplexer. For example, the frequency bands of the downlink signals transmitted by the base station and collected by the interference device in the area are set to be 900MHz, 1800MHz and 2100MHz, after the downlink signals are collected, the downlink signals of 900MHz, 1800MHz and 2100MHz are distinguished, then the downlink signals of 900MHz, 1800MHz and 2100MHz are filtered and amplified respectively, and finally the downlink signals of 900MHz, 1800MHz and 2100MHz are output to the central processing unit in sequence.
2. And demodulating the downlink signal after filtering and amplifying through a signal processing module to obtain a carrier frequency point and signal intensity of the downlink signal. Preferably, the downlink signals of different frequency bands are demodulated in sequence, that is, each time filtering and amplifying is performed, the filtered and amplified downlink signal is immediately demodulated.
3. And according to the obtained carrier frequency point and signal intensity of the downlink signal, the FPGA control module and the interference signal simulation generator are matched to modulate the downlink simulation interference signal of the frequency band corresponding to the downlink signal.
4. The FPGA control module controls the signal amplifier to carry out gain adjustment on the downlink analog interference signals of different frequency bands, so that the signal intensity of the downlink analog interference signals is greater than that of the downlink signals transmitted by the base station, and after adjustment is finished, all transmitting antennas are controlled to simultaneously transmit the downlink analog interference signals for interference. The gain amplitude of the gain adjustment is preferably 6 to 10dBm corresponding to the downlink signal. For example, if the downlink signal strength of a certain frequency band transmitted by the base station is set to be-40 dBm, the amplitude of the correspondingly modulated downlink analog interference signal is more than-34 dBm, thereby ensuring effective dot-frequency interference.
Example 2
This embodiment is substantially the same as embodiment 1, and the main areas are:
the shell is of a square structure, and a three-wire socket, an RJ-45 network cable interface and the like of the to-be-protected tube and the ship-shaped switch are integrated on one side of the shell. The back of the shell is provided with a hanging fastener, and the interference device can be directly placed on a horizontal table top or can be installed on a wall or a foot rest through the hanging fastener. The shell comprises a bottom shell and a cover shell, and the bottom shell and the cover shell are fixed through screws.
Example 3
The embodiment verifies the technical scheme in embodiment 1, and specifically includes the following steps:
the interference device described in example 1 was placed in a conference room, and the following signals were measured in a corporate conference room: carrier frequency: 944MHz, signal strength: -73 dBm; carrier frequency 1935MHz, signal strength: -94 dBm; carrier frequency 2330MHz, signal strength: -59dBm, etc. The downlink analog interference signals transmitted after modulation are respectively: carrier frequency: 944MHz, signal strength: -63 dBm; carrier frequency 1935MHz, signal strength: -88 dBm; carrier frequency 2330MHz, signal strength: -51dBm, etc. Then, the telephone dialing and the Internet surfing can not be communicated in a conference room by using mobile phones of different systems, so that the technical scheme of the embodiment 1 can achieve a very good interference effect and can effectively prevent information leakage.
Any feature disclosed in this specification may, unless stated otherwise, be replaced by alternative features serving the same, equivalent or similar purpose; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.
Claims (8)
1. A base station signal interference apparatus, comprising: the intelligent monitoring system comprises a shell, a central processing unit, a signal receiving unit, a signal transmitting unit, a man-machine interface unit and a power supply unit, wherein the central processing unit, the signal receiving unit, the signal transmitting unit and the power supply unit are all fixed in the shell; the signal receiving unit is used for collecting downlink signals transmitted by the base station, and the central processing unit modulates downlink analog interference signals according to the downlink signals and controls the signal transmitting unit to transmit the downlink analog interference signals.
2. The base station signal interference device of claim 1, wherein: and a wireless communication module connected with the central processing unit is also arranged in the shell.
3. A base station signal interference apparatus according to claim 1 or 2, wherein: the signal receiving unit comprises a receiving antenna, a first multiplexer, a second multiplexer and a plurality of filter amplifiers, the receiving antenna is connected with the input end of the first multiplexer, the plurality of filter amplifiers are respectively connected with the output end of the first multiplexer and the input end of the second multiplexer, and the output end of the second multiplexer is connected with the central processing unit; the receiving antenna is used for acquiring downlink signals and sending the acquired downlink signals to the first multiplexer, the first multiplexer is used for sending the downlink signals of different frequency bands to the plurality of filter amplifiers respectively for filtering and amplifying, and the second multiplexer is used for sequentially outputting the filtered and amplified downlink signals to the central processing unit.
4. A base station signal interference unit according to claim 3, characterized in that: the central processing unit comprises a signal processing module, an FPGA control module and an interference signal simulation generator, the signal processing module is respectively connected with the second multiplexer and the FPGA control module, and the interference signal simulation generator is respectively connected with the signal transmitting unit and the FPGA control module; the signal processing module is used for demodulating the downlink signal after filtering and amplifying, and the FPGA control module is used for modulating the downlink analog interference signal and controlling the interference signal analog generator to generate the downlink analog interference signal.
5. The base station signal interference device of claim 4, wherein: the signal transmitting unit comprises a plurality of transmitting channels for transmitting downlink analog interference signals in a frequency division range, each transmitting channel comprises a signal amplifier for performing gain adjustment and a transmitting antenna for transmitting the downlink analog interference signals, the signal amplifier is connected with the interference signal analog generator, and the transmitting antenna is connected with the signal amplifier.
6. The base station signal interference device of claim 1, wherein: the shell is of a square structure.
7. The base station signal interference device of claim 1, wherein: the back of the shell is provided with a hanging fastener.
8. The base station signal interference device of claim 1, wherein: the shell comprises a bottom shell and a cover shell, and the bottom shell and the cover shell are fixed through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121345.3U CN210693954U (en) | 2020-01-19 | 2020-01-19 | Base station signal interference device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121345.3U CN210693954U (en) | 2020-01-19 | 2020-01-19 | Base station signal interference device |
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| CN210693954U true CN210693954U (en) | 2020-06-05 |
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| CN202020121345.3U Active CN210693954U (en) | 2020-01-19 | 2020-01-19 | Base station signal interference device |
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