A method for generating interference signal and related equipment and products

Abstract

The present invention relates to an interference signal generation method and related equipment and products. The interference signal generation method includes: obtaining a base station signal in a current environment; generating a synchronization interference signal and a filling interference signal according to the base station signal; the synchronization interference signal has the same position in the frequency domain and time domain as the synchronization signal in the base station signal; the filling interference signal has a different position in the frequency domain and time domain from the synchronization signal, and the frequency band of the filling interference signal is in the frequency band of the base station signal; and using the synchronization interference signal and the filling interference signal as interference signals.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of terminal device interference, and more specifically, to an interference signal generation method and related equipment and products. Background Art

[0002] In traditional schemes, operations for interfering with the communication of terminal devices are usually carried out, such as traditional signal interference schemes based on VCO technology, DDS technology, and storage and forwarding technology, but these traditional interference schemes have the problem of low interference effect. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide an interference signal generation method and related equipment and products in view of the technical defects of the above-mentioned traditional signal interference in the prior art that the interference effect is poor.

[0004] The technical solution adopted by the embodiment of the present invention to solve the technical problem is: constructing a method for generating an interference signal, comprising:

[0005] Get the base station signal in the current environment;

[0006] Generate a synchronization interference signal and a filling interference signal according to the base station signal; the synchronization interference signal has the same position in the frequency domain and time domain as the synchronization signal in the base station signal; the filling interference signal has different positions in the frequency domain and time domain from the synchronization signal, and the frequency band of the filling interference signal is in the frequency band of the base station signal;

[0007] The synchronization interference signal and the filling interference signal are used as interference signals.

[0008] Preferably, in an embodiment of the interference signal generating method described in the invention, the step of generating a synchronization interference signal and a filling interference signal according to the base station signal includes:

[0009] Determine the frequency band of the base station signal;

[0010] Demodulating the base station signal to obtain a synchronization signal in the base station signal;

[0011] The synchronization interference signal and the filling interference signal are generated according to the frequency band of the synchronization signal and the base station signal.

[0012] Preferably, in an embodiment of the interference signal generating method described in the invention, the synchronization signal includes a PSS signal.

[0013] Preferably, in an embodiment of the interference signal generation method of the invention, the step of generating the synchronization interference signal according to the frequency band of the synchronization signal and the base station signal includes:

[0014] A synchronous interference signal having the same center frequency as the synchronous signal and a phase difference of 180 degrees is generated.

[0015] Preferably, in an embodiment of the interference signal generation method described in the invention, the step of generating the filling interference signal according to the frequency band of the synchronization signal and the base station signal includes:

[0016] Generate a modulation signal by a random algorithm, and modulate the modulation signal to a subcarrier corresponding to a preset frequency band to generate the filling interference signal;

[0017] The preset frequency band is the remaining frequency band of the base station signal except the frequency occupied by the synchronization interference signal.

[0018] Preferably, in an embodiment of the interference signal generation method described in the invention, a modulated signal is generated by a random algorithm, and the modulated signal is modulated to a subcarrier corresponding to a preset frequency band to generate the filler interference signal, including:

[0019] generating a modulation signal including a plurality of sub-modulation signals by a random algorithm;

[0020] For each subcarrier corresponding to the preset frequency band, any one is selected from all the submodulation signals for modulation;

[0021] The signals modulated by all subcarriers in the preset frequency band are collectively used as the filling interference signal.

[0022] Preferably, in an embodiment of the interference signal generating method described in the invention, the amplitude of the filling interference signal is smaller than the amplitude of the synchronization interference signal.

[0023] Preferably, in an embodiment of the interference signal generating method described in the invention, the amplitude of the filling interference signal is half of the amplitude of the synchronization interference signal.

[0024] Preferably, in an embodiment of the interference signal generation method of the invention, generating the synchronization interference signal according to the base station signal includes:

[0025] Obtaining the signal strength of the base station signal;

[0026] If the signal strength of the base station signal is less than or equal to a preset strength, the signal amplitude of the synchronization interference signal is set to a preset amplitude;

[0027] When it is determined that the signal strength of the base station signal is greater than the preset strength, the signal amplitude of the synchronization interference signal is set to be greater than the preset amplitude.

[0028] Preferably, in an embodiment of the interference signal generating method described in the invention, after the step of using the synchronization interference signal and the filling interference signal as interference signals, the method further includes:

[0029] Acquire the base station signal in the current environment again;

[0030] Acquire the latest synchronization signal from the base station signal acquired most recently;

[0031] An offset value of the synchronization interference signal relative to the latest synchronization signal is obtained to correct the position of the synchronization interference signal in the time domain according to the offset value.

[0032] The embodiment of the present invention also constructs a signal jamming device, including:

[0033] A base station signal receiving unit, used to obtain base station signals in the current environment;

[0034] A first signal generating unit generates a synchronization interference signal and a filling interference signal according to the base station signal; the synchronization interference signal has the same position in the frequency domain and time domain as the synchronization signal in the base station signal; the filling interference signal has different positions in the frequency domain and time domain from the synchronization signal, and the frequency band of the filling interference signal is in the frequency band of the base station signal;

[0035] The second signal generating unit uses the synchronization interference signal and the filling interference signal as interference signals.

[0036] The embodiment of the present invention also constructs an electronic device, including a memory and a processor;

[0037] The memory is used to store computer programs;

[0038] The processor is configured to execute the computer program to implement the method described above.

[0039] The embodiment of the present invention further constructs a computer storage medium on which a computer program is stored. When the computer program is executed by a processor, the method described above is implemented.

[0040] The embodiment of the present invention further constructs a computer program product, including a computer program stored therein, and when the computer program is executed by a processor, the method described above is implemented.

[0041] The interference signal generation method and related devices proposed in the embodiment of the present invention have the following beneficial effects: since the synchronization interference signal and the synchronization signal have the same position in the frequency domain and time domain, the synchronization signal can be interfered with in a targeted manner, and the interference effect can be guaranteed. In addition, the interference signal includes the synchronization interference signal and the filling interference signal, and the frequency band union of the synchronization interference signal and the filling interference signal is not greater than the frequency band of the base station signal, so the data storage capacity requirement is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0043] Figure 1 It is a program flow chart of an embodiment of an interference signal generating method of the present invention.

[0044] Figure 2 It is a program flow chart of another embodiment of an interference signal generating method of the present invention.

[0045] Figure 3 The present invention is a schematic diagram of the signal relationship between a synchronous interference signal and a synchronous signal in an embodiment of an interference signal generating method of the present invention.

[0046] Figure 4 It is a schematic diagram of an interference signal in an embodiment of an interference signal generating method of the present invention.

[0047] Figure 5 It is a program flow chart of an embodiment of a method for generating a filling interference signal in an interference signal generating method of the present invention.

[0048] Figure 6 It is a program flow chart of another embodiment of an interference signal generating method of the present invention.

[0049] Figure 7 It is a program flow chart of an embodiment of a synchronous interference signal generating method in an interference signal generating method of the present invention.

[0050] Figure 8 It is a module schematic diagram of an embodiment of a signal jammer device of the present invention.

[0051] Description of Figure Numbers:

[0052] 110: base station signal receiving unit, 120: first signal generating unit, 130: second signal generating unit. DETAILED DESCRIPTION

[0053] In order to have a clearer understanding of the technical features, purposes and effects of the embodiments of the present invention, the specific implementation methods of the embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0054] like Figure 1 As shown, in a first embodiment of an interference signal generation method proposed by the present invention, the following steps are included: S1. Acquire a base station signal in the current environment. S2. Generate a synchronization interference signal and a filling interference signal according to the base station signal, and the synchronization interference signal has the same position in the frequency domain and time domain as the synchronization signal in the base station signal. The filling interference signal has a different position in the frequency domain and time domain from the synchronization signal, and the frequency band of the filling interference signal is in the frequency band of the base station signal. S3. Use the synchronization interference signal and the filling interference signal as interference signals.

[0055] In an embodiment of the present invention, the above method can be performed by a signal interference device (such as a frequency jammer) or a signal interference module (the interference module can be installed on other types of devices). The signal interference device or the signal interference module can be a software modification and upgrade for an existing hardware device to implement the above method, or a host device such as a computer can be used to control an existing signal interference device or interference module to implement the above method. The following description takes the execution subject as a signal interference device as an example to explain the interference signal generation method of the present application.

[0056] Based on step S1, the signal interference to the terminal device is, for example, interference with the signal communication process between the terminal device and the base station, specifically making it impossible for the terminal device to effectively demodulate the base station signal sent by the base station, so that the terminal device cannot establish mobile communication with the base station, so as to achieve the purpose of signal shielding of the terminal device. Therefore, step S1 needs to search all base station signals in the current environment first. In one embodiment, in the process of searching and receiving the base station signal, all base station signals can be received and stored for later processing. In one embodiment, the base station signal can also be processed while being received, or the process can omit the storage of the base station signal and only store the analysis results of the base station signal. In one scenario, when the current environment includes multiple signals, all signals in the environment can be identified according to preset identification rules to obtain all base station signals therein. It should be noted here that the acquisition process of the base station signal is to obtain the downlink signal broadcast by the base station, and the downlink signal here is the same as the downlink signal received by the terminal device under the premise of no interference.

[0057] Based on step S2, there is no restriction on the specific execution order between the two steps of generating a synchronization interference signal and generating a filling interference signal. For example, the synchronization interference signal and the filling interference signal can be generated at the same time, or the synchronization interference signal can be generated first and then the filling interference signal, or the filling interference signal can be generated first and then the synchronization interference signal.

[0058] The frequency band information corresponding to the base station signal can be obtained based on a variety of methods such as analyzing the base station signal to obtain the base station signal information, obtaining the set frequency sweeping band, obtaining the frequency band corresponding to each receiving antenna, and then generating a synchronization interference signal that is the same as the synchronization signal frequency band in the base station signal, and generating a filling interference signal that is different from the synchronization signal frequency band in the base station signal but still in the base station signal frequency band. The synchronization interference signal and filling interference signal generated by the embodiment of the present application, wherein the position of the synchronization interference signal in the frequency domain and time domain is the same as the position of the synchronization signal in the corresponding base station signal in the frequency domain and time domain, so the synchronization interference signal can be used to affect the demodulation process of the terminal device on the synchronization signal in the received base station signal, so as to interfere with the terminal device. Since the synchronization signal in the base station signal is only a part of the entire base station signal, in order to further enhance the overall interference effect of the interference signal on the base station signal, the embodiment of the present application generates a filling interference signal while generating a synchronization interference signal. The filling interference signal is different from the position of the base station synchronization signal in the frequency domain and time domain. In other words, the frequency of the filling interference signal can be the same as the frequency of part of the remaining signals or all the remaining signals in the base station signal except the synchronization signal, and the position of the filling interference signal in the time domain can be the same as the position of part of the remaining signals or all the remaining signals in the base station signal except the synchronization signal in the time domain. To simplify the expression, "the rest of the base station signal" is used below to represent part of the remaining signals or all the remaining signals in the base station signal except the synchronization signal, such as the CRS signal. In the embodiment of the present application, a filling interference signal with the same position in the frequency domain and time domain as the rest of the base station signal can be randomly generated by a random algorithm, or the information of the rest of the base station signal can be obtained by parsing the rest of the base station signal, and the filling interference signal with the same position in the frequency domain and time domain as the rest of the base station signal can be generated according to the information of the rest of the base station signal. Therefore, the filling interference signal can interfere with the frequency band of part of the remaining signals or all the remaining signals in the base station signal after the synchronization signal is removed.

[0059] In the embodiment of the present application, the same position of the synchronization interference signal and the synchronization signal in the frequency domain can be understood as the same frequency of the two, and the different positions of the filling interference signal and the synchronization signal in the frequency domain can be understood as the different frequencies of the two.

[0060] Based on step S3, the embodiment of the present invention uses the above-mentioned synchronization interference signal and filling interference signal as interference signals, so as to realize the generation of interference signals. In the subsequent working process, the interference signal can be transmitted to form signal interference to the terminal device, specifically: the terminal device will also receive the interference signal when receiving the base station signal. Due to the existence of the interference signal, the terminal device cannot effectively identify, extract and demodulate the base station signal, and it is impossible to achieve synchronization and communication with the base station. When there are multiple base station signals searched, and the multiple base station signals are in multiple different frequency bands, each base station signal can be processed separately to extract the base station signal information corresponding to each base station signal, and generate corresponding interference signals according to the frequency bands of each base station signal, so as to achieve full-band interference to the terminal device through all interference signals. Among them, the interference to the terminal device only acts on the downlink frequency band of the base station signal, that is, it only affects the demodulation process after the terminal device receives the base station signal, thereby realizing interference to the terminal device and achieving the shielding effect of the terminal device.

[0061] It should be noted that, since the frequency band of the filling interference signal is the same as the frequency of part of the remaining signals or all of the remaining signals in the base station signal except the synchronization signal, and the frequency of the synchronization interference signal is the same as the synchronization signal, the interference signal composed of the above-mentioned synchronization interference signal and the filling interference signal is completely in the same frequency band as the base station signal, and by sending the interference signal in a loop, communication interference to terminal devices such as mobile phones can be achieved. In other words, the frequency band of the interference signal generated by the embodiment of the present application can be exactly the same as the frequency band of the base station signal, or it can be smaller than the frequency band of the base station signal but located in the frequency band of the base station signal. In one embodiment, the interference signal can have a complete data frame structure, wherein the duration of each data frame can be an integer multiple of 10 milliseconds, such as 10 milliseconds or 20 milliseconds, etc., which is not limited in this embodiment.

[0062] It should be noted that the traditional signal interference schemes based on VCO technology and DDS technology generate noise signals covering the base station signal frequency band by generating VCO technology and DDS technology, thereby achieving signal interference for the terminal device. However, these two traditional signal interference schemes need to ensure that the coverage frequency band of the noise signal is larger, so they require higher power consumption and have poor interference effects. Compared with the above-mentioned traditional interference schemes based on VCO technology and DDS technology, the interference signal generated by the present application scheme includes two components: a synchronous interference signal and a filling interference signal, and they are used to accurately interfere with the synchronous interference signal in the base station signal and the remaining signal parts in the base station signal, respectively. Therefore, the interference effect is better, and the frequency band of the interference signal generated by this scheme is narrower (less than or equal to the frequency band of the base station signal), so it is also conducive to reducing power consumption. The traditional signal interference scheme based on the storage and forwarding technology requires first recording a section of base station signal, and then delaying or forwarding the recorded base station signal after a period of time. However, the traditional signal interference scheme has the defects of poor recorded signal quality, large amount of recorded signal data storage, and frequent interruption of interference to update the recorded base station signal, which makes the signal interference unstable. Therefore, the interference effect is poor, and it is usually necessary to integrate other interference schemes, which makes the design of the interference system too complicated. Compared with the above-mentioned traditional signal interference scheme based on the storage and forwarding technology, the scheme of the embodiment of the present application only needs to obtain a base station signal containing a complete data frame, and the data storage capacity requirement is relatively small. Moreover, since the embodiment of the present application does not achieve interference by forwarding the base station signal, there is no need to interrupt the interference process to update the recorded base station signal. The continuity of the interference is higher and the interference effect is better.

[0063] In one embodiment, if Figure 2 As shown, based on step S2, a synchronization interference signal and a filling interference signal are generated according to the base station signal, which can specifically include the following steps: S21, determining the frequency band of the base station signal, S22, demodulating the base station signal to obtain the synchronization signal in the base station signal, S23, generating a synchronization interference signal and a filling interference signal according to the synchronization signal and the frequency band of the base station signal.

[0064] For step S21, the specific execution mode of step S21 can be determined according to the way the signal interference device receives the base station signal, that is, different methods can be used to determine the base station frequency band for different base station signal reception methods. In this embodiment, the base station signal can be a complete base station frame.

[0065] For example: For a signal interference device that uses a receiving antenna and obtains base station signals by frequency scanning, since the frequency band where the base station signal should be located is public, the signal interference device switches the frequency band of the signal received by the receiving antenna to the various frequency bands where the base station signal should be located by setting the center frequency and bandwidth of the signal received by the receiving antenna. If a base station signal is received when switching to a certain frequency band, it means that the frequency band set by the receiving antenna at this time is the frequency band of the current base station signal. Therefore, if the signal interference device adopts this type of base station signal receiving method, step S21 can be to obtain the frequency band where the base station signal obtained each time is located by obtaining the center frequency band and bandwidth set each time. This specification takes this receiving method as an example to explain the technical solution of the present application.

[0066] For a signal interference device that uses multiple receiving antennas to receive base station signals in different frequency bands, each receiving antenna is pre-configured to accurately receive base station signals in a frequency band. Therefore, if the signal interference device uses such a base station signal receiving method, step S21 can obtain the receiving frequency band pre-configured for each receiving antenna to obtain the frequency bands where the base station signal is located.

[0067] For step S22, after the base station signal is acquired, the processing process of the base station signal can be to demodulate the base station signal to obtain the base station signal information, wherein the demodulation of the base station signal can be implemented by the existing demodulation method, and this embodiment does not limit this. The base station signal information acquired includes but is not limited to: EARFCN (carrier frequency point number) information, signal strength, cell synchronization information, PSS signal, SSS signal, CRS signal, PBCH signal, etc. Among them, the PSS signal and the SSS signal are a kind of synchronization signal, and an interference signal can be generated based on the acquired synchronization signal (at least one of the PSS signal or the SSS signal). And this embodiment does not limit the execution order of step S21 and step S22, for example: step S21 and step S22 may be executed successively, or step S22 and step S21 may be executed successively, or step S21 and step S22 may be executed simultaneously.

[0068] For step S23, the acquired synchronization signal includes not only the synchronization data carried by the synchronization signal itself, but also the position of the synchronization signal in the frequency domain and time domain. Therefore, a synchronization interference signal having the same position as the synchronization signal in the frequency domain and time domain can be generated according to the synchronization signal. On the premise that the frequency band of the base station signal has been acquired, the remaining base station signals in the base station signal except the synchronization signal can be further obtained according to the base station signal and the synchronization signal, and a filling interference signal can be generated according to the remaining base station signals. The above process of generating a filling interference signal according to the remaining base station signals can, for example, be: according to the frequency band of the base station signal and the synchronization signal, first determine the position of all or part of the remaining signals in the base station signal except the synchronization signal (i.e., the above-mentioned remaining base station signals) in the frequency domain and time domain, and then modulate the corresponding modulated signal to the frequency of the remaining base station signals to generate the filling interference signal in this embodiment. The synchronization interference signal cooperates with the filling interference signal to finally achieve an interference signal with the same frequency band as the base station signal, such as Figure 4 shown.

[0069] For example, when the signal interference device uses the above-mentioned frequency scanning method to obtain the base station signal, in the process of demodulating the base station signal, the minimum unit of the base station signal (base station frame) can be determined, and the subframe position of the synchronization signal in the base station frame can also be determined. For example, under the 4G-TTD frame structure, the synchronization signal is located in the 1st subframe and the 6th subframe, and the subframe position is the position of the synchronization signal in the time domain. The frequency of the synchronization signal can be determined based on the center frequency point set when the base station signal is obtained. Specifically, the frequency band where a certain number (for example, 64) of subcarriers on both sides of the center frequency point are located can be used as the frequency band of the synchronization signal (that is, the position in the frequency domain), and the number of subcarriers on both sides of the center frequency point is the same. It can be understood that the frequency band where these subcarriers are located is in the frequency band of the base station signal and is much smaller than the frequency band of the base station signal.

[0070] It can be understood that the subframes in the base station frame except the subframe where the synchronization signal is located constitute the above-mentioned remaining base station signals. Therefore, the positions of other subframes can be used as the time domain positions of the remaining base station signals, and the frequency bands in the base station signal frequency band except the frequency band where the above-mentioned subcarrier is located can be used as the frequency domain positions of the remaining base station signals.

[0071] For example, if the frequency band is the 4G frequency band in the current cell and the bandwidth is 20 MHz, then an interference signal with a bandwidth of 20 MHz may be generated based on the frequency band. It should be understood that the frequency band may include a frequency range and a bandwidth corresponding to the frequency range.

[0072] In one embodiment, the synchronization signal in the base station signal includes a PSS signal. Among them, the PSS signal is the main synchronization signal of the base station, and the PSS signal is used to achieve frequency synchronization between the terminal device and the base station. Therefore, the synchronization interference signal generated corresponding to this embodiment can interfere with the terminal device to demodulate the PSS signal. After receiving the base station signal, the signal interference device obtains the position in the frequency domain and time domain corresponding to the PSS signal by demodulating the base station signal, and then generates a corresponding synchronization interference signal. The PSS signal acts on the initial process of the terminal device accessing the base station, and the terminal device determines the cell to be accessed based on the detected PSS signal. When the terminal device receives the synchronization interference signal and the PSS signal at the same time, the influence of the synchronization interference signal on the PSS signal makes the terminal device unable to recognize the useful information in the PSS signal, that is, the terminal device cannot synchronize with the base station. At the same time, the downlink frequency band of each base station signal has a corresponding frequency band, which may be the same or different, but there is a corresponding PSS signal in each frequency band of the base station signal. At this time, the signal interference device can generate a synchronous interference signal corresponding to the PSS signal of each downlink frequency band, so that the terminal device cannot communicate with the base station through any possible downlink frequency band, thereby achieving full-band interference to the terminal device.

[0073] In one embodiment, in step S23, the auxiliary synchronization signal (i.e., the above-mentioned SSS signal) in the base station signal can also be selected as the synchronization signal to generate a synchronization interference signal. Similarly, when receiving the base station signal, the signal interference device demodulates the base station signal to obtain the position in the frequency domain and time domain corresponding to the SSS signal, and then generates the corresponding synchronization interference signal. The SSS signal also acts on the initial process of the terminal device accessing the base station. After detecting the PSS signal, the terminal device will further detect the SSS signal to use the PSS signal and the SSS signal to obtain the cell identifier to determine the cell to be accessed. When the terminal device simultaneously receives the synchronization interference signal and the SSS signal corresponding to the SSS, the influence of the synchronization interference signal corresponding to the SSS on the SSS signal makes the terminal device unable to recognize the useful information in the SSS signal, that is, the terminal device cannot be synchronized with the base station.

[0074] In one embodiment, based on step S23, a synchronization interference signal is generated according to the frequency band of the synchronization signal and the base station signal, specifically including: generating a synchronization interference signal with the same center frequency as the synchronization signal and a phase difference of 180 degrees. That is, in order to maximize the interference ability of the synchronization interference signal to the terminal device, the synchronization interference signal can be set to an inverted signal of the synchronization signal of the base station signal, so as to achieve complete interference with the synchronization signal in the base station signal. When the synchronization interference signal has the same center frequency as the synchronization signal and an opposite phase, the synchronization interference signal received by the terminal device and the synchronization signal of the base station can form a maximum mutual cancellation, that is, the amplitude of the synchronization interference signal can cancel the amplitude of the synchronization signal of the base station to the maximum extent, so that the amplitude of the signal after cancellation is reduced to an amplitude level that the terminal device cannot resolve, thereby achieving that the terminal device cannot recognize any information in the base station synchronization signal. In one embodiment, the synchronization signal can be directly inverted to obtain the synchronization interference signal. At this time, the obtained synchronization interference signal is not only the same as the center frequency of the synchronization signal, the phase difference is 180 degrees, and the amplitude is the same, so that the synchronization interference signal can better cancel the amplitude of the synchronization signal.

[0075] In one embodiment, taking a 4G base station signal as an example, the PSS signal in the base station signal adopts a ZC (Zadoff-Chu) sequence, which is distributed at the center frequency position of the carrier in the frequency domain. The PSS signal frequency band is 64 subcarriers wide, and the position of the PSS signal in the time domain is: for example, in FDD mode, the PSS signal is in subframe 0 and subframe 5. When generating a synchronous interference signal, the synchronous interference signal adopts the same sequence as the base station signal PSS signal, but the phase is rotated 180˚. From the time domain point of view, each symbol of the PSS signal and the synchronous interference signal contains the same ZC sequence, and both are in subframe 0 and subframe 5. From the frequency domain point of view, each symbol of the PSS signal and the synchronous interference signal is located at the same position, and the frequencies of the subcarriers corresponding to the PSS signal and the synchronous interference signal are the same, and the only difference is that the phase is opposite. Among them, the PSS signal and the synchronous interference signal after phase rotation can be specifically as follows Figure 3 As shown: A is a signal in the PSS signal generated by the base station, B is the synchronous interference signal after the phase is rotated 180°, B is also the synchronous interference signal corresponding to A, and the amplitudes of A and B are equal. Since the phase difference between A and B is 180 degrees, the amplitudes and phases of A and B can cancel each other out.

[0076] Among them, the PSS sequence d (n) (i.e., the synchronization interference signal) after phase rotation of 180° is the Zadoff-Chu sequence, which is generated by the following formula 1:

[0077] Formula 1:

[0078]

[0079] The above n is the PSS subcarrier number divided according to the base station PSS signal, with a total of 62 PSS subcarriers from 0 to 61, j is the imaginary unit, u is the root value of the Zadoff-Chu sequence, and the values ​​of u include 25, 29 and 34. The above formula negates the traditional PSS sequence d (n) to obtain the PSS sequence d (n) after phase rotation of 180°, that is, the synchronous interference signal.

[0080] In another embodiment, taking a 5G signal as an example, the PSS sequence d of 5G PSS (n) The generation formula is shown in Formula 2 below:

[0081] Formula 2:

[0082] .

[0083] Formula 2 has the relationship shown in Formula 3 and Formula 4.

[0084] Formula 3:

[0085] .

[0086] Formula 4:

[0087] .

[0088] The above formula 2 is the frequency domain expression of 127 PSS subcarriers from 0 to 126 in the PSS sequence of the 5G signal. n is the PSS subcarrier number divided according to the base station PSS signal. The value range of i is 0-126. It is the sequence index number of the main synchronization signal of the direct link. By combining the above formulas 2, 3, and 4, the result of dpss (n) in formula 2 can be obtained. The combined calculation logic can refer to the existing technology, and this solution will not elaborate on it.

[0089] The frequency domain expressions of the 127 PSS subcarriers (i.e., the above formula 2) are negated to obtain the frequency domain expressions of the 127 PSS interference subcarriers. The frequency domain expressions of the 127 PSS interference subcarriers together constitute the synchronous interference signal. Figure 4 As shown, Figure 4 Schematic diagrams of interference signals in the time domain and frequency domain are shown.

[0090] Here, the terminal device is explained by taking a mobile phone as an example. The process of realizing mobile phone interference based on the synchronous interference signal can be as follows. Since the mobile phone needs to demodulate the PSS signal in the base station signal to obtain relevant base station information, it can subsequently upload data to the base station through uplink communication. In the actual working process, after the interference signal provided by this embodiment is transmitted, since the interference signal is in the frequency band of the base station signal, or the same as the frequency band of the base station signal, the interference signal will be detected and received by the mobile phone together with the base station signal, and since the phase difference between the synchronous interference signal and the PSS signal is 180 degrees (that is, the phase is opposite), the phase is opposite during the receiving process, which is equivalent to the amplitude of the synchronous interference signal being offset by the amplitude of the PSS signal in the base station signal. Therefore, the mobile phone finally receives a PSS signal with an extremely low amplitude after being offset by the synchronous interference signal, which makes it impossible for the mobile phone to decode the relevant base station information from the PSS signal, thereby making it impossible for the mobile phone to communicate uplink with the base station, so as to achieve the effect of interfering with the mobile phone communication.

[0091] In one embodiment, based on step S22, the specific process of generating a filling interference signal may include: generating a modulation signal through a random algorithm, and modulating the modulation signal to a subcarrier corresponding to a preset frequency band to generate a filling interference signal. Wherein, the preset frequency band is the remaining frequency band in the frequency band of the base station signal except the frequency occupied by the synchronization interference signal. If the total frequency band of the interference signal is the same as the frequency band of the base station signal, a synchronization signal with the base station signal has been generated based on the above process, such as a synchronization interference signal with the same frequency band as the PSS signal, and there are subcarriers other than the synchronization signal frequency band in the total frequency band of the base station signal, it can be understood that the frequency band of the synchronization interference signal only occupies a part of the frequency band in the interference signal, and there are other frequency bands in the interference signal. In this embodiment, the remaining frequency band in the interference signal can be divided into a plurality of remaining sub-frequency bands, each of which can correspond to a subcarrier, and then a random algorithm can be used to randomly generate a plurality of sub-modulation signals with the same number as the remaining sub-frequency bands, and all sub-modulation signals constitute the modulation signal of this embodiment, and finally all sub-modulation signals can be modulated one-to-one to all subcarriers, so as to obtain a filling interference signal that fills the vacant frequency band of the interference signal. In another optional embodiment, a random algorithm may be used to randomly generate a modulated signal. In this case, the filling interference signal may be obtained by repeatedly modulating the modulated signal onto each subcarrier.

[0092] When a terminal device receives a base station signal and a filler interference signal at the same time, the filler interference signal affects the signals in the base station signal's frequency bands other than the synchronization signal, making it impossible for the terminal device to demodulate useful information from the signals in the base station signal's frequency bands other than the synchronization signal, thereby making it impossible for the terminal device to communicate with the base station.

[0093] Further, if Figure 5As shown, the above-mentioned step of generating a modulation signal by a random algorithm and modulating the modulation signal to the subcarrier corresponding to the preset frequency band to generate a filling interference signal may include: step 231, generating a modulation signal including multiple sub-modulation signals by a random algorithm. Step 232, for each subcarrier corresponding to the preset frequency band, any one is selected from all sub-modulation signals for modulation. Step 233, the signals modulated by all subcarriers in the preset frequency band are collectively used as the filling interference signal.

[0094] Specifically, in this embodiment, all submodulation signals can be generated in advance by a random algorithm. When modulating each subcarrier, one of the submodulation signals can be randomly selected from all the submodulation signals to modulate the subcarrier to finally complete the modulation of all subcarriers and obtain the entire filling interference signal. It should be noted that in this embodiment, the number of submodulation signals can be the same as the number of subcarriers, or the number of submodulation signals can be less than the number of subcarriers, or the number of submodulation signals can be greater than the number of subcarriers, and this embodiment does not limit this.

[0095] In another optional embodiment, the method of generating the filling interference signal is not limited to the above situation. For example, each sub-modulation signal is not pre-generated, but before modulating each subcarrier, a sub-modulation signal is generated in real time using a random algorithm, and the subcarrier is modulated using the sub-modulation signal, and finally the modulation of all subcarriers is completed to obtain the entire filling interference signal.

[0096] It should be noted that, in this solution, there is no order between the generation process of multiple sub-modulation signals and the modulation process of each sub-modulation signal onto a subcarrier. For example, the modulation process may be performed after all multiple sub-modulation signals are generated, or each sub-modulation signal may be immediately modulated onto a subcarrier, which is not limited in this embodiment.

[0097] In one embodiment, the random algorithm may adopt a QPSK modulation algorithm, and four sub-modulation signals may be randomly generated by the QPSK modulation algorithm, that is, the obtained modulation signal may include four sub-modulation signals. One of the four sub-modulation signals is randomly selected to modulate the subcarrier corresponding to the preset frequency band. The frequency band width occupied by each subcarrier may be set in advance or calculated in real time, which is not limited in this embodiment.

[0098] Optionally, based on step S2, the signal amplitude of the filling interference signal is smaller than the amplitude of the synchronous interference signal. In this embodiment, the synchronous interference signal realizes the main interference effect, and the filling interference signal is used to further enhance the interference effect. Therefore, the signal amplitude of the filling interference signal can be set to be smaller than the synchronous interference signal, so as to reduce the power consumption of the signal interference device while achieving a strong interference effect. In a specific implementation, the amplitude of the filling interference signal can be set to half of the amplitude of the synchronous interference signal, which can effectively ensure that the filling interference signal also has a good interference effect. The power consumption of the signal interference device can be reduced.

[0099] In one embodiment of the interference signal generating method of the present invention, Figure 7 As shown, based on generating a synchronous interference signal according to the base station signal in step S2, an embodiment of the present invention may further include the following steps: Step S7, obtaining the signal strength of the base station signal. Step S8, when it is determined that the signal strength of the base station signal is less than or equal to the preset strength, the signal amplitude of the synchronous interference signal is set to the preset amplitude. Step S9, when it is determined that the signal strength of the base station signal is greater than the preset strength, the signal amplitude of the synchronous interference signal is set to be greater than the preset amplitude. It should be noted that the execution order of the above three steps and the previous step of "generating a synchronous interference signal with the same center frequency as the synchronization signal and a phase difference of 180 degrees" is not limited.

[0100] That is, after acquiring all base station signals in the current environment, the signal strength of each base station signal can be confirmed first, and it can be determined whether the strength of each base station signal exceeds the preset strength. The preset strength can be determined according to the strength of the base station signal in the environment when the signal interference device is at a normal distance from the base station. Since the magnitude of the base station signal strength can indicate the distance between the signal interference device and the base station and the communication stability between the terminal device and the base station, if the strength of the base station signal is higher than the preset strength, it means that the signal interference device and its interference area may be close to the base station, and the communication stability between the terminal device and the base station in the interference area is high, then the signal amplitude of the synchronous interference signal in the interference signal emitted by the signal interference device is increased on the basis of the preset amplitude to improve the interference effect of the synchronous interference signal. If the strength of the base station signal is less than or equal to the preset strength, it means that the signal interference device and its interference area may be close to the base station, and the communication stability between the terminal device and the base station is low, then the signal amplitude of the synchronous interference signal in the corresponding interference signal is controlled to the preset amplitude. At this time, although the amplitude of the synchronous interference signal is not very large, it can still achieve the interference effect, thereby reducing power consumption. This embodiment dynamically adjusts the strength of the synchronization interference signal in combination with the strength of the base station signal, which can not only ensure the interference effect but also further reduce the power consumption of the device.

[0101] In one embodiment, during the adjustment of the synchronous interference signal, the signal amplitude of the filling interference signal in the interference signal is also adjusted as the signal amplitude of the synchronous interference signal changes. For example, the signal amplitude of the filling interference signal can be always controlled at half of the signal amplitude of the synchronous interference signal. It can also be understood that the amplitudes of the synchronous interference signal and the filling interference signal are adjusted in proportion. Among them, the preset strengths corresponding to different base station signals can be set to be consistent or inconsistent, which is not limited in this embodiment.

[0102] like Figure 6 As shown, in one embodiment of the interference signal generation method proposed by the present invention, the embodiment of the present invention further includes the following steps: Step S4, obtaining the base station signal in the current environment again. Step S5, obtaining the latest synchronization signal from the latest acquired base station signal. Step S6, obtaining the offset value of the synchronization interference signal relative to the latest synchronization signal, so as to correct the position of the synchronization interference signal in the time domain according to the offset value.

[0103] Specifically, because all relevant signals in the interference signal generation process need to rely on the local clock, for example, it is necessary to rely on the local clock in the signal interference device to record the timing of the base station signal and generate synchronous interference signals and fill interference signals, but the local clock itself has a certain accuracy error. Even if the local clock is adjusted to align with the timing of the received base station signal after receiving the base station signal at the beginning, after the interference signal transmission process continues for a period of time, the accuracy error of the local clock will cause its timing to deviate from the timing of the base station signal, which will also cause the generated synchronous interference signal timing and fill interference signal timing to deviate. This deviation will become larger and larger over time. When the deviation is so large that the timing of the generated synchronous interference signal is significantly different from the timing of the synchronization signal in the actual base station signal, the interference effect will be reduced.

[0104] In view of this, the present scheme is provided with step S4, so after a period of time (the length of the preset time period can be predetermined according to the clock accuracy), the timing of the synchronization interference signal needs to be adjusted. The specific process of the adjustment can be to re-receive the base station signal, calculate the time domain position of the synchronization signal in the base station signal re-received this time, and then compare the time domain position of the re-obtained synchronization signal with the time domain position of the synchronization signal determined according to the local clock in the process of generating the interference signal last time, and obtain the difference in the time domain position of the synchronization signal received twice. Since the time domain position of the synchronization interference signal is the same as the time domain position of the synchronization signal determined according to the local clock, the difference in the time domain position of the synchronization signal received twice is the offset value of step S4. Of course, when adjusting the timing of the synchronization interference signal, the local clock can also be corrected according to the offset value obtained in step S6 at the same time, so that the local signal can be re-aligned with the timing of the base station signal.

[0105] Before the base station signal is received again, the synchronization interference signal generated last time is also in the same time domain position as the synchronization signal determined based on the local clock. Therefore, in another optional embodiment, after the base station signal is received again, the time domain position of the latest synchronization signal obtained based on the re-received base station signal can also be directly compared with the timing position of the synchronization interference signal generated last time, and the timing position difference of the synchronization interference signal generated last time relative to the current synchronization signal is obtained as the offset value of step S4. The timing of the synchronization interference signal is compensated according to the obtained offset value, that is, the time domain position of the synchronization interference signal is corrected according to the offset value, so that the time domain position of the corrected synchronization interference signal can be consistent with the time domain position of the synchronization signal in the re-acquired base station signal, so that the interference signal sent subsequently can always maintain a good interference effect.

[0106] This embodiment does not limit the execution process of step S4. For example, the process of obtaining the offset value to correct the synchronization interference signal can be triggered according to a preset interval time or other trigger conditions. This embodiment does not limit this.

[0107] In addition, such as Figure 8 As shown, in one embodiment of a signal interference device of the present invention, the signal interference device includes: a base station signal receiving unit 110, which is used to obtain a base station signal in a current environment. A first signal generating unit 120, which generates a synchronization interference signal and a filling interference signal according to the base station signal. The synchronization interference signal has the same position in the frequency domain and time domain as the synchronization signal in the base station signal. The filling interference signal has a different position in the frequency domain and time domain from the synchronization signal, and the frequency band of the filling interference signal is in the frequency band of the base station signal. A second signal generating unit 130, which uses the synchronization interference signal and the filling interference signal as interference signals.

[0108] Specifically, the specific coordination operation process between the various units of the signal interference device here can refer to the above-mentioned terminal signal interference method, which will not be repeated here.

[0109] At the same time, it can be understood that any electronic device, if it has the function of implementing the corresponding steps performed in the above-mentioned terminal signal interference method, can be understood as a specific embodiment of the signal interference device of the present invention. Each function can be implemented by hardware, or the corresponding software can be implemented by hardware. The corresponding hardware or software includes one or more modules corresponding to the above functions. That is, the steps in the above method are respectively executed by one or more modules. The specific coordination operations between the modules can refer to the specific process of the above method, which will not be repeated here.

[0110] In addition, in one embodiment of an electronic device proposed by the present invention, the electronic device may further include a memory and a processor. The memory is used to store a computer program. The processor is used to execute the computer program to implement any of the above methods. Specifically, according to an embodiment of the present invention, the process described with reference to the flowchart above can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed by an electronic device and when executed, it performs the above functions defined in the method of the embodiment of the present invention. The electronic device in the present invention can be a terminal such as a notebook, a desktop, a tablet computer, a smart phone, or a server.

[0111] In addition, in one embodiment of a computer storage medium proposed by the present invention, a computer program is stored thereon, and when the computer program is executed by a processor, any of the above methods is implemented. Specifically, it should be noted that the above-mentioned computer-readable medium of the present invention may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In one embodiment of the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device. In one embodiment of the present invention, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than computer readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0112] The computer readable medium may be included in the electronic device, or may exist independently without being installed in the electronic device.

[0113] In addition, in one embodiment of a computer program product of the present invention, a computer program is stored thereon, and when the computer program is executed by a processor, any one of the above interference signal generation methods is implemented. The specific steps and beneficial effects of the interference signal generation method can be referred to the above embodiments. Since the countermeasure device for the drone proposed in the embodiment of the present invention adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0114] It is understandable that the above embodiments only express the preferred implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope of the claims of the present invention.

Claims

1. A method for generating an interference signal, characterized in that: include: Get the base station signal in the current environment; Generate a synchronization interference signal and a filling interference signal according to the base station signal; the synchronization interference signal has the same position in the frequency domain and time domain as the synchronization signal in the base station signal; the filling interference signal has different positions in the frequency domain and time domain from the synchronization signal, and the frequency band of the filling interference signal is in the frequency band of the base station signal; The synchronization interference signal and the filling interference signal are used as interference signals, wherein the filling interference signal is used to interfere with the frequency bands of all remaining signals in the base station signal after the synchronization signal is removed, and is randomly generated by a random algorithm; Wherein, the step of generating a synchronization interference signal and a filling interference signal according to the base station signal includes: Determining a frequency band of the base station signal; Demodulating the base station signal to obtain a synchronization signal in the base station signal; Generate the synchronization interference signal and the filling interference signal according to the frequency band of the synchronization signal and the base station signal; The step of generating the filling interference signal according to the frequency band of the synchronization signal and the base station signal includes: Generate a modulation signal by a random algorithm, and modulate the modulation signal to a subcarrier corresponding to a preset frequency band to generate the filling interference signal; The preset frequency band is the remaining frequency band of the base station signal except the frequency occupied by the synchronization interference signal.

2. The interference signal generating method according to claim 1, characterized in that: The synchronization signal includes a PSS signal.

3. The interference signal generating method according to claim 1, characterized in that: The step of generating the synchronization interference signal according to the synchronization signal and the frequency band of the base station signal comprises: A synchronous interference signal having the same center frequency as the synchronous signal and a phase difference of 180 degrees is generated.

4. The interference signal generating method according to claim 1, characterized in that: Generating a modulation signal by a random algorithm, and modulating the modulation signal to a subcarrier corresponding to a preset frequency band to generate the filling interference signal, including: generating a modulation signal including a plurality of sub-modulation signals by a random algorithm; For each subcarrier corresponding to the preset frequency band, any one is selected from all the submodulation signals for modulation; The signals modulated by all subcarriers in the preset frequency band are collectively used as the filling interference signal.

5. The interference signal generating method according to claim 1, characterized in that: The amplitude of the filling interference signal is smaller than the amplitude of the synchronization interference signal.

6. The interference signal generating method according to claim 5, characterized in that: The amplitude of the filling interference signal is half of the amplitude of the synchronization interference signal.

7. The interference signal generating method according to claim 1, characterized in that: Generating the synchronization interference signal according to the base station signal includes: Obtaining the signal strength of the base station signal; If the signal strength of the base station signal is less than or equal to a preset strength, the signal amplitude of the synchronization interference signal is set to a preset amplitude; When it is determined that the signal strength of the base station signal is greater than the preset strength, the signal amplitude of the synchronization interference signal is set to be greater than the preset amplitude.

8. The interference signal generating method according to claim 1, characterized in that: After the step of using the synchronization interference signal and the filling interference signal as interference signals, the method further includes: Acquire the base station signal in the current environment again; Acquire the latest synchronization signal from the base station signal acquired most recently; An offset value of the synchronization interference signal relative to the latest synchronization signal is obtained to correct the position of the synchronization interference signal in the time domain according to the offset value.

9. A signal jammer, characterized in that: include: A base station signal receiving unit, used to obtain base station signals in the current environment; A first signal generating unit generates a synchronization interference signal and a filling interference signal according to the base station signal; the synchronization interference signal has the same position in the frequency domain and time domain as the synchronization signal in the base station signal; the filling interference signal has different positions in the frequency domain and time domain from the synchronization signal, and the frequency band of the filling interference signal is in the frequency band of the base station signal, wherein the filling interference signal is used to interfere with the frequency bands of all remaining signals in the base station signal after the synchronization signal is removed, and is randomly generated by a random algorithm; A second signal generating unit, using the synchronization interference signal and the filling interference signal as interference signals; The specific steps of the first signal generating unit generating the synchronization interference signal and the filling interference signal include: Determining a frequency band of the base station signal; Demodulating the base station signal to obtain a synchronization signal in the base station signal; Generate a synchronization interference signal and a filling interference signal according to the frequency band of the synchronization signal and the base station signal, and the process of generating the filling interference signal according to the frequency band of the synchronization signal and the base station signal includes generating a modulation signal by a random algorithm, and modulating the modulation signal to a subcarrier corresponding to a preset frequency band to generate the filling interference signal; The preset frequency band is the remaining frequency band of the base station signal except the frequency occupied by the synchronization interference signal.

10. An electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is configured to execute the computer program to implement the method according to any one of claims 1 to 8.

11. A computer storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

12. A computer program product, characterized in that The method comprises a computer program; the computer program is executed by a processor to implement the method according to any one of claims 1 to 8.

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