Jamming signal generation method, related device, and computer program product

Abstract

A jamming signal generation method, a related device, and a computer program product. The jamming signal generation method comprises: acquiring a base station signal in a current environment; generating a synchronization jamming signal and a fill jamming signal on the basis of the base station signal, wherein the position of the synchronization jamming signal and the position of a synchronization signal in the base station signal in a frequency domain and a time domain are the same, the position of the fill jamming signal and the position of the synchronization signal in the frequency domain and the time domain are different, and a frequency band of the fill jamming signal is in a frequency band of the base station signal; and using the synchronization jamming signal and the fill jamming signal as jamming signals.

Description

Interference signal generation method and related device and computer program product

[0001] This application claims priority to the Chinese patent application No. 202410630445.1, filed on May 21, 2024, and entitled "Interference signal generation method and related device and product", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of terminal device interference, and in particular to an interference signal generation method and related device and product. BACKGROUND

[0003] In the field of TSCM (TECHNICAL SURVEILLANCE COUNTER MEASURES), for example, in the anti-terrorist explosive disposal scene, it is necessary to interfere with the signal of the terminal device (such as a mobile phone, a remote controller) of a remote-controlled bomb to avoid attacks by remote-controlled bombs in important situations. In the traditional scheme, the operation of interfering with the communication of the terminal device usually adopts, for example, a traditional signal interference scheme based on VCO technology, DDS technology, and storage and forwarding technology, but these traditional interference schemes have the problem of poor interference effect.

[0004] Technical solution of the present application

[0005] The present application provides an interference signal generation method, comprising:

[0006] Obtaining a base station signal in a current environment;

[0007] Generating a synchronous interference signal and a padding interference signal according to the base station signal; the synchronous interference signal has the same position in the frequency domain and time domain as a synchronization signal in the base station signal; the padding interference signal has a different position in the frequency domain and time domain from the synchronization signal, and the frequency band of the padding interference signal is in the frequency band of the base station signal;

[0008] Taking the synchronous interference signal and the padding interference signal as interference signals.

[0009] The present application also provides a signal interference device, comprising:

[0010] A base station signal receiving unit for obtaining a base station signal in a current environment;

[0011] The first signal generating unit generates a synchronous interference signal and a padding interference signal according to the base station signal; the synchronous interference signal has the same position in the frequency domain and the time domain as a synchronization signal in the base station signal; the padding interference signal has a different position in the frequency domain and the time domain from the synchronization signal, and a frequency band of the padding interference signal is in a frequency band of the base station signal;

[0012] The second signal generating unit takes the synchronous interference signal and the padding interference signal as interference signals.

[0013] The embodiment of the present application further provides an electronic device, including a memory and a processor;

[0014] The memory is used for storing a computer program;

[0015] The processor is used for executing the computer program to realize the method as described above.

[0016] The embodiment of the present application further provides a computer storage medium, which has a computer program stored thereon, and the computer program is executed by a processor to realize the method as described above.

[0017] The embodiment of the present application further provides a computer program product, which includes a computer program stored thereon, and the computer program is executed by a processor to realize the method as described above.

[0018] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0019] The technical solutions of the present application will be further described in detail below with the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a program flow chart of an embodiment of the interference signal generating method provided by the present application.

[0021] Fig. 2 is a program flow chart of another embodiment of the interference signal generating method provided by the present application.

[0022] Fig. 3 is a signal relationship diagram of a synchronous interference signal and a synchronization signal in an embodiment of the interference signal generating method provided by the present application.

[0023] Fig. 4 is a diagram of an interference signal in an embodiment of the interference signal generating method provided by the present application.

[0024] FIG. 5 is a program flowchart of an embodiment of the method for generating a jamming signal according to the present application.

[0025] FIG. 6 is a program flowchart of another embodiment of the method for generating a jamming signal according to the present application.

[0026] FIG. 7 is a program flowchart of an embodiment of the method for generating a jamming signal according to the present application.

[0027] FIG. 8 is a module schematic diagram of an embodiment of the signal jamming device according to the present application.

[0028] Embodiments of the present application

[0029] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood, and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] As shown in FIG. 1, in a first embodiment of the interference signal generation method provided in the present application, the following steps are included: S1, acquiring base station signals in a current environment. S2, generating a synchronous interference signal and a filling interference signal according to the base station signals, the synchronous interference signal having the same position in the frequency domain and the time domain as a synchronization signal in the base station signals. The filling interference signal has a different position in the frequency domain and the time domain from the synchronization signal, and the frequency band of the filling interference signal is in the frequency band of the base station signals. S3, taking the synchronous interference signal and the filling interference signal as interference signals.

[0033] In the embodiments of the present application, the above method can be executed by a signal interference device (such as a frequency interference instrument) or a signal interference module (which can be installed in other types of devices). The signal interference device or the signal interference module can be upgraded by software to realize the above method for existing hardware devices, or the above method can also be realized by controlling the existing signal interference device or the interference module through a computer or other host computer device. The following description takes the signal interference device as an example to explain the interference signal generation method of the present application.

[0034] Based on step S1, the signal interference to the terminal device is, for example, to interfere with the signal communication process between the terminal device and the base station, specifically to make the terminal device unable 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 the base station signals in the current environment. In an embodiment, during the process of searching and receiving the base station signals, all the base station signals can be received and stored for later processing. In an embodiment, the base station signals can also be processed at the same time as they are received, or the process can omit the storage of the base station signals and only store the analysis results of the base station signals. In a scenario, when the current environment includes multiple signals, all the base station signals in the environment can be identified according to a preset identification rule to obtain all the base station signals. It should be noted here that the process of obtaining the base station signals is to obtain the downlink signals broadcast by the base station, and the downlink signals here are the same as the downlink signals received by the terminal device under the premise of no interference.

[0035] Based on step S2, the specific execution order between the steps of generating the synchronous interference signal and generating the filling interference signal is not limited, for example: the synchronous interference signal and the filling interference signal can be generated at the same time, or the synchronous interference signal can be generated first and then the filling interference signal can be generated, or the filling interference signal can be generated first and then the synchronous interference signal can be generated.

[0036] The base station signal corresponding frequency band information can be obtained in multiple ways based on base station signal information obtained by analyzing base station signals, obtaining a set of swept frequency bands, obtaining frequency bands corresponding to each receiving antenna, and the like. Then, a synchronization interference signal identical to the synchronization signal frequency band in the base station signal is generated, and a filling interference signal different from the synchronization signal frequency band in the base station signal but still in the base station signal frequency band is generated. The synchronization interference signal and the filling interference signal generated by the embodiments of the present application, wherein the position of the synchronization interference signal in the frequency domain and the time domain is identical to the position of the synchronization signal in the frequency domain and the time domain in the corresponding base station signal, so the synchronization interference signal can be used to affect the demodulation process of the synchronization signal in the received base station signal by the terminal device, 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 embodiments of the present application generate the filling interference signal at the same time of generating the synchronization interference signal. The position of the filling interference signal in the frequency domain and the time domain is different from that of the base station synchronization signal, in other words, the frequency of the filling interference signal can be the same as that of the remaining signals in the base station signal except the synchronization signal or all the remaining signals, and the position of the filling interference signal in the time domain can be the same as that of the remaining signals in the base station signal except the synchronization signal or all the remaining signals. In order to simplify the description, the "remaining base station signal" is used to represent the remaining signals in the base station signal except the synchronization signal or all the remaining signals, such as the CRS signal. In the embodiments of the present application, the filling interference signal with the same position in the frequency domain and the time domain as the remaining base station signal can be randomly generated by a random algorithm, or the information of the remaining base station signal can be obtained by analyzing the remaining base station signal, and the filling interference signal with the same position in the frequency domain and the time domain as the remaining base station signal can be generated according to the information of the remaining base station signal. Therefore, the filling interference signal can interfere with the frequency band of the remaining signals in the base station signal except the synchronization signal or all the remaining signals.

[0037] In the embodiments of the present application, the position of the synchronization interference signal in the frequency domain is identical to that of the synchronization signal, which can be understood as the frequencies of the two being identical, and the position of the filling interference signal in the frequency domain is different from that of the synchronization signal, which can be understood as the frequencies of the two being different.

[0038] Based on step S3, the embodiment of the present application is to take the above-mentioned synchronization interference signal and the filling interference signal as interference signals, so as to realize the generation of the interference signals. In the subsequent work process, the terminal device can be interfered by transmitting the interference signals, specifically: when the terminal device receives the base station signal, it also receives the interference signals. Due to the existence of the interference signals, the terminal device cannot effectively identify and extract the base station signal and demodulate it, so as to realize the synchronization and communication with the base station. When the searched base station signal is multiple, and the multiple base station signals are respectively in multiple different frequency bands, each base station signal can be processed respectively to extract the base station signal information corresponding to each base station signal, and a corresponding interference signal can be generated according to the frequency band of each base station signal, so as to realize the full-band interference to the terminal device by all the interference signals. The interference to the terminal device only acts on the downlink frequency band of the base station signal, that is, only affects the demodulation process of the terminal device after receiving the base station signal, so as to realize the interference to the terminal device and achieve the shielding effect to the terminal device. It should be noted that, since the frequency band of the filling interference signal is the same as the frequency 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 the communication interference to the terminal device such as mobile phone can be realized by transmitting the interference signal cyclically. In other words, the frequency band of the interference signal generated by the embodiment of the present application can be completely the same as the frequency band of the base station signal, or it can also be smaller than the frequency band of the base station signal but located in the frequency band of the base station signal. In an embodiment, the interference signal can have a complete data frame structure, wherein the time length of each data frame can be an integer multiple of 10 milliseconds, such as 10 milliseconds or 20 milliseconds, etc., and the embodiment does not limit this.

[0039] It should be noted that the traditional signal interference scheme based on VCO technology and DDS technology is to generate a noise signal covering the frequency band of the base station signal by generating VCO technology and DDS technology, so as to realize signal interference to the terminal device, but the two traditional signal interference schemes need to ensure that the coverage frequency band of the noise signal is large, so high power consumption is needed, and the interference effect is poor. Compared with the above traditional interference scheme based on VCO technology and DDS technology, the interference signal generated by the present application includes two components of the synchronization interference signal and the filling interference signal, and is used for accurate interference on the synchronization interference signal in the base station signal and the remaining signal part in the base station signal respectively, so the interference effect is better, and the frequency band of the interference signal generated by the present application is narrower (less than or equal to the frequency band of the base station signal), so it is also beneficial to reduce power consumption. The traditional signal interference scheme based on the storage and forwarding technology needs to record a base station signal first, and then forwards the recorded base station signal after delaying or advancing a period of time, but this traditional signal interference scheme has the defects of poor quality of the recorded signal, large storage amount of the recorded signal data, and the need to frequently interrupt the interference to update the recorded base station signal, so that the signal interference is unstable, so the interference effect is poor, and usually other interference schemes need to be integrated to cause the design of the interference system to be too complex. Compared with the above traditional signal interference scheme based on the storage and forwarding technology, the scheme of the present application embodiment only needs to obtain a base station signal containing a complete data frame, has a smaller data storage amount requirement, and since the present application embodiment does not realize interference by forwarding the base station signal, it also does not need to interrupt the interference process to update the recorded base station signal, so the continuity of the interference is high, and the interference effect is good.

[0040] In an embodiment, as shown in FIG. 2, based on step S2, the synchronization interference signal and the 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 the synchronization interference signal and the filling interference signal according to the synchronization signal and the frequency band of the base station signal.

[0041] For step S21, the specific execution manner of step S21 can be determined according to the manner in which the signal interference device receives the base station signal, that is, different manners can be used to determine the base station frequency band for different base station signal receiving manners. In the present embodiment, the base station signal can be a complete base station frame.

[0042] For example, for a signal interference device that uses one receiving antenna and acquires the base station signal by sweeping, 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 by setting the center frequency point and bandwidth of the signal received by the receiving antenna, and sequentially locates the frequency band of the base station signal. If the 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 uses this type of base station signal receiving method, step S21 can be to obtain the frequency band of the base station signal acquired each time by acquiring the center frequency band and bandwidth set each time. This specification takes this type of receiving method as an example to explain and describe the technical solutions of the present application.

[0043] For a signal interference device that uses multiple receiving antennas to receive base station signals of different frequency bands, since each receiving antenna is pre-configured to accurately receive base station signals in a frequency band. Therefore, if the signal interference device uses this type of base station signal receiving method, step S21 can be to obtain the receiving frequency band pre-configured for each receiving antenna to obtain the frequency bands of the base station signals.

[0044] For step S22, after acquiring the base station signal, the processing of the base station signal can be demodulation processing of the base station signal to obtain base station signal information, wherein the demodulation of the base station signal can be implemented by using existing demodulation methods, which are not limited in the present embodiment. The acquired base station signal information 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 signals, and the interference signal can be generated based on the acquired synchronization signal (at least one of the PSS signal or the SSS signal). And the present embodiment does not limit the execution order of step S21 and step S22, for example: step S21 and step S22 can be executed in sequence, or step S22 and step S21 can be executed in sequence, or step S21 and step S22 can be executed simultaneously.

[0045] 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 the time domain, so a synchronization interference signal with the same position in the frequency domain and the time domain as the synchronization signal 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 signal in the base station signal except the synchronization signal can be obtained according to the base station signal and the synchronization signal, and the padding interference signal can be generated according to the remaining base station signal. The process of generating the padding interference signal according to the remaining base station signal, for example, can be: determining the position in the frequency domain and the time domain of all or part of the remaining signal (i.e., the above-mentioned remaining base station signal) in the base station signal except the synchronization signal according to the frequency band of the base station signal and the synchronization signal, and then modulating the corresponding modulation signal to the frequency of the remaining base station signal to generate the padding interference signal in the embodiment. The synchronization interference signal and the padding interference signal cooperate to ultimately achieve an interference signal with the same frequency band as the base station signal, as shown in FIG. 4.

[0046] For example, when the signal interference device adopts the above-mentioned sweep frequency method to acquire the base station signal, the minimum unit (base station frame) of the base station signal can be determined in the process of demodulating the base station signal, and the subframe position of the synchronization signal in the base station frame can also be determined, for example, the synchronization signal is located in the 1st subframe and the 6th subframe under the 4G-TTD frame structure, which is the position of the synchronization signal in the time domain. The frequency of the synchronization signal can be determined according to the center frequency point set according to the obtained base station signal, specifically, the frequency band of a certain number (for example, 64) of subcarriers on both sides of the center frequency point can be taken as the frequency band of the synchronization signal (i.e., 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 of these subcarriers is in the frequency band of the base station signal, and is much smaller than the frequency band of the base station signal.

[0047] It can be understood that the other subframes in the base station frame except the subframes where the synchronization signal is located constitute the above-mentioned remaining base station signal, so the positions of the other subframes can be taken as the time domain positions of the remaining base station signal, and the frequency band of the base station signal except the frequency band of the above-mentioned subcarriers can be taken as the frequency domain position of the remaining base station signal.

[0048] For example, the frequency band is the 4G frequency band in the current cell, and the bandwidth is 20MHz, so the interference signal with a bandwidth of 20MHz can be generated according to this frequency band. It should be understood that the frequency band here can include the frequency range and the bandwidth corresponding to the frequency range.

[0049] In an embodiment, the synchronization signal in the base station signal comprises a PSS signal. The PSS signal is a primary synchronization signal of the base station, and the PSS signal is used to realize frequency synchronization between the terminal device and the base station. Therefore, the generated synchronization interference signal in the embodiment can interfere with the demodulation of the PSS signal by the terminal device. After receiving the base station signal, the signal interference device obtains the position of the PSS signal in the frequency domain and the time domain by demodulating the base station signal, and then generates a corresponding synchronization interference signal. The PSS signal is used in the initial process of the terminal device accessing the base station. The terminal device determines the cell to be accessed according to 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 be synchronized with the base station. Meanwhile, each downlink frequency band of the base station signal has a corresponding frequency band, which can 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 synchronization 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 realizing full-band interference to the terminal device.

[0050] In an embodiment, the synchronization signal in the base station signal comprises a PSS signal. The PSS signal is a primary synchronization signal of the base station, and the PSS signal is used to realize frequency synchronization between the terminal device and the base station. Therefore, the generated synchronization interference signal in the embodiment can interfere with the demodulation of the PSS signal by the terminal device. After receiving the base station signal, the signal interference device obtains the position of the PSS signal in the frequency domain and the time domain by demodulating the base station signal, and then generates a corresponding synchronization interference signal. The PSS signal is used in the initial process of the terminal device accessing the base station. The terminal device determines the cell to be accessed according to 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 be synchronized with the base station. Meanwhile, each downlink frequency band of the base station signal has a corresponding frequency band, which can 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 synchronization 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 realizing full-band interference to the terminal device.

[0051] In an embodiment, based on step S23, the synchronization interference signal is generated according to the synchronization signal and the frequency band of 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 as the inverse signal of the synchronization signal of the base station signal, which can realize complete interference to the synchronization signal in the base station signal. When the center frequency of the synchronization interference signal and the synchronization signal is the same and the phase is opposite, the synchronization interference signal and the synchronization signal of the base station received by the terminal device can form the maximum mutual cancellation, that is, the amplitude of the synchronization interference signal can maximize the amplitude of the synchronization signal of the base station, so that the amplitude of the canceled signal is reduced to the amplitude degree that the terminal device cannot parse, thereby realizing that the terminal device cannot identify any information in the base station synchronization signal. In an embodiment, the synchronization interference signal can be obtained by directly inverting the synchronization signal, at this time, the obtained synchronization interference signal not only has the same center frequency as the synchronization signal and a phase difference of 180 degrees, but also has the same amplitude, which can make the synchronization interference signal better cancel the amplitude of the synchronization signal.

[0052] In an embodiment, taking the 4G base station signal as an example, the PSS signal in the base station signal adopts the ZC (Zadoff-Chu) sequence, which is distributed at the carrier center frequency position in the frequency domain, and the PSS signal frequency band is 64 subcarrier widths, and the position of the PSS signal in the time domain is: for example, in the FDD mode, the PSS signal is in the subframe 0 and the subframe 5. When generating the synchronization interference signal, the synchronization interference signal adopts the same sequence as the PSS signal of the base station signal, but the phase is rotated by 180°. From the time domain, each symbol of the PSS signal and the synchronization interference signal contains the same ZC sequence, and they are all in the subframe 0 and the subframe 5. From the frequency domain, each symbol of the PSS signal and the synchronization interference signal is located at the same position, and the frequencies of the subcarriers corresponding to the PSS signal and the synchronization interference signal are the same, and the only difference is that the phases are opposite. The PSS signal and the phase-rotated synchronization interference signal can be specifically as shown in FIG. 3: A is one of the PSS signals generated by the base station, B is the synchronization interference signal after the phase rotation of 180°, B is also the synchronization interference signal corresponding to A, and the amplitudes of A and B are equal. Since the phases of A and B are opposite by 180 degrees, the amplitudes and phases of A and B can be mutually canceled.

[0053] Wherein, the PSS sequence d(n) after the phase rotation of 180° (i.e. the synchronization interference signal) is the Zadoff-Chu sequence, which is generated by the following formula one:

[0054] Formula one:

[0055] The n above is a PSS subcarrier number divided according to a base station PSS signal, and there are 62 PSS subcarriers from 0 to 61. The above formula takes the opposite of the traditional PSS sequence d(n) to obtain the PSS sequence d(n) after phase rotation of 180°, that is, the synchronization interference signal.

[0056] In another embodiment, taking a 5G signal as an example, the PSS sequence d PSS (n) is generated according to the following Formula Two:

[0057] Formula Two:

[0058] There is a relationship shown in Formula Three and Formula Four in Formula Two.

[0059] Formula Three: x(i+7) = (x(i+4) + x(i)) mod 2

[0060] Formula Four: [x(6) x(5) x(4) x(3) x(2) x(1) x(0)] = [1 1 1 0 1 1 0]

[0061] The above Formula Two is a frequency domain expression of 127 PSS subcarriers in the PSS sequence of the 5G signal. n is a PSS subcarrier number divided according to a base station PSS signal. In the formula two, is the sequence index number of the sidelink primary synchronization signal, and the results of dpss(n) in Formula Two can be obtained by combining the above Formulas Two, Three and Four. The combined calculation logic can refer to the prior art, and the present scheme will not be repeated.

[0062] The frequency domain expression of 127 PSS subcarriers (i.e., the above Formula Two) is inverted to obtain the frequency domain expression of 127 PSS interference subcarriers, and the frequency domain expression of 127 PSS interference subcarriers collectively constitutes a synchronization interference signal. As shown in FIG. 4, FIG. 4 shows a schematic diagram of the interference signal in time domain and frequency domain, respectively.

[0063] The terminal device is exemplified by a mobile phone. The process of implementing mobile phone interference based on the synchronization interference signal can be as follows. In actual work, after the interference signal provided by the embodiment is transmitted, because the interference signal is in the frequency band of the base station signal or has the same frequency band as the base station signal, the interference signal is detected and received together with the base station signal by the mobile phone. Because the phase of the synchronization interference signal and the phase of the PSS signal are 180 degrees apart (i.e., the phases are opposite), the amplitude of the synchronization interference signal is offset by the amplitude of the PSS signal in the base station signal during the receiving process. Therefore, the mobile phone finally receives a PSS signal with extremely low amplitude after the offset by the synchronization interference signal, so that the mobile phone cannot decode the relevant base station information from the PSS signal, and thus cannot communicate with the base station, thereby achieving the effect of interfering with the mobile phone communication.

[0064] In an embodiment, based on step S22, the specific process of generating the filling interference signal can include: generating a modulation signal through a random algorithm, and modulating the modulation signal to the subcarriers corresponding to the preset frequency band to generate the filling interference signal. The preset frequency band is the frequency band of the base station signal except for 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, the synchronization signal of the base station signal, such as the PSS signal, has been generated based on the above process, and there are subcarriers in the total frequency band of the base station signal except for the frequency band of the synchronization signal. It can be understood that the frequency band of the synchronization interference signal only occupies a part of the frequency band of the interference signal, and the remaining frequency band of the interference signal is also occupied. In the embodiment, the remaining frequency band of the interference signal can be divided into a plurality of remaining sub-frequency bands, each remaining sub-frequency band can correspond to a subcarrier, and then a random algorithm can be used to randomly generate a plurality of sub-modulation signals which are the same as the number of the remaining sub-frequency bands. All the sub-modulation signals constitute the modulation signal of the embodiment, and finally all the sub-modulation signals can be modulated to all the subcarriers one by one, so that the filling interference signal for filling the remaining frequency band of the interference signal can be obtained. In another optional embodiment, a random algorithm can also be used to randomly generate one modulation signal, and the filling interference signal can be obtained by repeatedly modulating the one modulation signal to each subcarrier.

[0065] When the terminal device receives the base station signal and the filling interference signal at the same time, the filling interference signal has an impact on the signals in the remaining frequency band of the base station signal except for the synchronization signal, so that the terminal device cannot demodulate useful information from the signals in the remaining frequency band of the base station signal except for the synchronization signal, and thus the terminal device cannot communicate with the base station.

[0066] Further, as shown in FIG. 5, the step of generating the jamming signal by the random algorithm and modulating the jamming signal to the sub-carrier corresponding to the preset frequency band can include: step 231, generating the modulation signal including a plurality of sub-modulation signals by the random algorithm. Step 232, for each sub-carrier corresponding to the preset frequency band, selecting an arbitrary one from all the sub-modulation signals for modulation. Step 233, collectively taking the signals after modulation of all the sub-carriers in the preset frequency band as the jamming signal.

[0067] Specifically, in the embodiment, all the sub-modulation signals can be generated by the random algorithm in advance. When modulating each sub-carrier, one of the sub-modulation signals can be randomly selected from all the sub-modulation signals for modulation to finally complete the modulation of all the sub-carriers and obtain the entire jamming signal. It should be noted that in the embodiment, the number of the sub-modulation signals can be the same as the number of the sub-carriers, or the number of the sub-modulation signals can be less than the number of the sub-carriers, or the number of the sub-modulation signals can be greater than the number of the sub-carriers, and the embodiment does not limit this.

[0068] In another optional embodiment, the generation method of the jamming signal is not limited to the above case. For example, each sub-modulation signal is not generated in advance, but a sub-modulation signal is generated in real time by the random algorithm before modulation of each sub-carrier, and the sub-modulation signal is used to modulate the sub-carrier to finally complete the modulation of all the sub-carriers and obtain the entire jamming signal.

[0069] It should be noted that in the present scheme, the generation process of the plurality of sub-modulation signals and the modulation process of each sub-modulation signal modulated to the sub-carrier have no sequence. For example, the modulation process can be performed after all the plurality of sub-modulation signals are generated, or each sub-modulation signal can be modulated to a sub-carrier immediately after being generated, and the embodiment does not limit this.

[0070] In an embodiment, the random algorithm can use the QPSK modulation algorithm, and four sub-modulation signals can be randomly generated by the QPSK modulation algorithm, i.e., the modulation signal obtained can include four sub-modulation signals. One of the four sub-modulation signals is randomly selected to modulate the sub-carrier corresponding to the preset frequency band. The frequency band width occupied by each sub-carrier can be set in advance or calculated in real time, and the embodiment does not limit this.

[0071] Optionally, based on step S2, the signal amplitude of the filling interference signal is less 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 less than the synchronous interference signal, so that the signal interference device power consumption is reduced while realizing the strong interference effect. In a specific implementation, the amplitude of the filling interference signal can be set to be half of the amplitude of the synchronous interference signal, and the power consumption of the signal interference device can be reduced on the premise of effectively ensuring that the filling interference signal also has a good interference effect.

[0072] In an embodiment of the interference signal generation method of the present application, as shown in FIG. 7, based on the step S2 of generating the synchronous interference signal according to the base station signal, the embodiment of the present application can further include the following steps: step S7, obtaining the signal strength of the base station signal. Step S8, judging whether the signal strength of the base station signal is less than or equal to the preset strength, and then setting the signal amplitude of the synchronous interference signal to be the preset amplitude. Step S9, judging whether the signal strength of the base station signal is greater than the preset strength, and then setting the signal amplitude of the synchronous interference signal 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 the synchronous interference signal with the same center frequency as the synchronous signal and a phase difference of 180 degrees” is not limited.

[0073] That is, after obtaining all the base station signals in the current environment, the signal strength of each base station signal can be first confirmed, and it is judged 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 and the base station are at a normal distance. Since the size of the base station signal strength can represent 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 are likely to be close to the base station, and the communication stability between the terminal device and the base station in the interference area is higher, so the signal amplitude of the synchronous interference signal in the interference signal emitted by the signal interference device is increased based on the preset amplitude, so as 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 are likely to be close to the base station, and the communication stability between the terminal device and the base station is low, so the signal amplitude of the synchronous interference signal in the corresponding interference signal is controlled to be the preset amplitude. At this time, although the amplitude of the synchronous interference signal is not very large, it can still realize the interference effect, so as to reduce the power consumption. This embodiment dynamically adjusts the strength of the synchronous 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.

[0074] In an embodiment, during the adjustment of the synchronous interference signal, the signal amplitude of the filling interference signal is also adjusted according to the change of the signal amplitude of the synchronous interference signal, for example, the signal amplitude of the filling interference signal can be 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. The preset strengths corresponding to different base station signals can be set to be consistent or inconsistent, which is not limited in the embodiment.

[0075] As shown in FIG. 6, in an embodiment of the interference signal generation method provided by the application, the embodiment of the application further includes the following steps: step S4, acquiring 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 synchronous interference signal relative to the latest synchronization signal, so as to correct the position of the synchronous interference signal in the time domain according to the offset value.

[0076] Specifically, because all related signals in the interference signal generation process need to rely on the local clock, for example, the local clock in the signal interference device is needed to record the timing of the base station signal and generate the synchronous interference signal and the filling interference signal, but the local clock itself has a certain precision error. Even if the local clock is adjusted to align with the timing of the received base station signal at the beginning, the precision error of the local clock will cause the timing of the generated synchronous interference signal and the filling interference signal to deviate from the timing of the base station signal after a period of time. This deviation will become larger and larger over time, and when the deviation is large enough to make the timing of the generated synchronous interference signal deviate greatly from the timing of the synchronization signal in the actual base station signal, it will cause the interference effect to decrease.

[0077] To this end, the present scheme is provided with step S4, which needs to adjust the timing of the synchronous interference signal after a period of time (the length of the preset time can be determined in advance according to the clock accuracy). The specific process of adjustment can be to receive the base station signal again, calculate the time domain position of the synchronization signal in the base station signal received this time again, and then compare the time domain position of the synchronization signal obtained this time again with the time domain position of the synchronization signal determined according to the local clock in the last interference signal generation process to obtain the difference between the time domain positions of the two received synchronization signals. Since the time domain position of the synchronous interference signal is the same as the time domain position of the synchronization signal determined according to the local clock, the difference between the time domain positions of the two received synchronization signals is the offset value of step S4. Of course, when adjusting the timing of the synchronous interference signal, the local clock can also be corrected according to the offset value obtained in step S6, so that the local signal can be aligned with the timing of the base station signal again.

[0078] Before the base station signal is re-received, the last generated synchronization interference signal is also in the same time domain position as the synchronization signal determined according to the local clock. Therefore, in another optional embodiment, after the base station signal is re-received, the time domain position of the latest synchronization signal obtained according to the re-received base station signal can also be directly compared with the time sequence position of the last generated synchronization interference signal, and the time sequence position difference of the last generated synchronization interference signal relative to the current synchronization signal is obtained as the offset value of step S4. The time sequence 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, thereby enabling the subsequently transmitted interference signal to always maintain good interference effect.

[0079] The present embodiment does not limit the execution process of this 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, which is not limited in the present embodiment.

[0080] In addition, as shown in FIG. 8, in an embodiment of a signal interference device of the present application, the signal interference device comprises: a base station signal receiving unit 110, configured to acquire a base station signal in a current environment. A first interference signal generating unit 120, configured to generate a synchronization interference signal and a filling interference signal according to the base station signal. The synchronization interference signal is in the same frequency domain and time domain position as the synchronization signal in the base station signal. The filling interference signal is different from the synchronization signal in the frequency domain and time domain, 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, configured to take the synchronization interference signal and the filling interference signal as interference signals.

[0081] Specifically, the specific cooperation operation process between the units of the signal interference device here can refer to the above-mentioned terminal signal interference method, which will not be repeated here.

[0082] At the same time, it can be understood that for any electronic device, if it has the function of implementing the corresponding steps performed in the above-mentioned terminal signal interference method, it can be understood as a specific embodiment of the signal interference device of the present application. Each function can be realized by hardware, or realized by hardware executing corresponding software. The corresponding hardware or software includes one or more modules corresponding to the above-mentioned functions. That is, one or more modules respectively execute the steps in the above-mentioned method. The specific cooperation operation between each module can refer to the specific process of the above-mentioned method, which will not be repeated here.

[0083] In addition, an embodiment of the electronic device according to the present application can further include a memory and a processor. The memory is configured to store a computer program. The processor is configured to execute the computer program to implement the method according to any one of the above embodiments. Specifically, the processes described above with reference to the flowcharts can be implemented as a computer software program according to an embodiment of the present application. For example, an embodiment of the present application includes a computer program product including a computer program carried on a computer readable medium, the computer program including program code for implementing the method shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed in the electronic device and executed to perform the above functions defined in the method according to an embodiment of the present application. The electronic device according to the present application can be a terminal such as a notebook, a desktop, a tablet computer, a smart phone, or a server.

[0084] In addition, an embodiment of the computer storage medium according to the present application stores a computer program, and the computer program is executed by a processor to implement the method according to any one of the above embodiments. Specifically, it should be noted that the computer readable medium according to the present application can be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, 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 an embodiment of the present application, the computer readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, device or apparatus. In an embodiment of the present application, the computer readable signal medium can include a data signal carried in a baseband or as a part of a carrier wave, which carries computer readable program code. Such a propagated data signal can take various forms, including but not limited to an electromagnetic signal, an optical signal or any suitable combination of the above. The computer readable signal medium can also be any computer readable medium that is not a computer readable storage medium and that can transmit, propagate or transport program for use by or in connection with an instruction execution system, device or apparatus. The program code contained on the computer readable medium can be transmitted by any suitable medium, including but not limited to a wire, an optical fiber, an RF (radio frequency) or the like, or any suitable combination of the above.

[0085] The computer readable medium can be included in the electronic device. Alternatively, the computer readable medium can exist separately from the electronic device.

[0086] In addition, in an embodiment of the computer program product of the present application, a computer program is stored thereon, and the computer program is executed by a processor to implement the interference signal generation method of any one of the above. The specific steps and beneficial effects of the interference signal generation method can be referred to the above embodiments. Since the countermeasure device of the unmanned aerial vehicle in the embodiments of the present application adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be described one by one here.

[0087] It can be understood that the above embodiments only express the preferred embodiments of the present application, which are described in detail and specifically, but cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for those skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A method for generating interference signals, comprising: obtaining a base station signal in a current environment; generating a synchronous interference signal and a filling interference signal according to the base station signal; the synchronous interference signal has the same position in frequency domain and time domain as a synchronous signal in the base station signal; the filling interference signal has a different position in frequency domain and time domain from the synchronous signal, and a frequency band of the filling interference signal is in a frequency band of the base station signal; and taking the synchronous interference signal and the filling interference signal as interference signals. The step of generating a synchronous interference signal and a filling interference signal according to the base station signal comprises: determining a frequency band of the base station signal; demodulating the base station signal to obtain a synchronous signal in the base station signal; and generating the synchronous interference signal and the filling interference signal according to the synchronous signal and the frequency band of the base station signal. The step of determining the frequency band of the base station signal comprises: switching a frequency band of a signal received by a receiving antenna to be in each frequency band where a base station signal should be, and if the base station signal is received when switching to a certain frequency band, determining that a frequency band set by the receiving antenna is the frequency band of the current base station signal; or using multiple receiving antennas to receive base station signals of different frequency bands, obtaining frequency bands corresponding to the receiving antennas, and determining the frequency band of the base station signal according to the frequency bands corresponding to the receiving antennas. The step of demodulating the base station signal to obtain a synchronous signal in the base station signal comprises: demodulating the base station signal to obtain base station signal information corresponding to the base station signal; and obtaining the synchronous signal in the base station signal according to the base station signal information. The base station signal information comprises the synchronous signal, and the base station signal information further comprises one or more of carrier frequency point number information, signal strength, cell synchronization information, CRS signal and PBCH signal.

2. The interference signal generating method according to claim 1, characterized by, The synchronous signal comprises a PSS signal and / or an SSS signal. The step of generating the synchronous interference signal according to the synchronous signal and the frequency band of the base station signal comprises: generating a synchronous interference signal having the same center frequency as the synchronous signal and a phase difference of 180 degrees. The step of generating the filling interference signal according to the synchronous signal and the frequency band of the base station signal comprises: determining remaining base station signals based on the base station signal and the synchronous signal, the remaining base station signals being part of the base station signal or all of the base station signal after removing the synchronous signal; and generating the filling interference signal according to the remaining base station signals. The step of generating the filling interference signal according to the synchronous signal and the frequency band of the base station signal comprises: generating a modulation signal by a random algorithm, and modulating the modulation signal to subcarriers corresponding to a preset frequency band to generate the filling interference signal; wherein the preset frequency band is a remaining frequency band in the frequency band of the base station signal except for a frequency occupied by the synchronous interference signal.

3. The interference signal generating method according to claim 2, characterized by, The step of generating the filling interference signal by a random algorithm and modulating the modulation signal to subcarriers corresponding to a preset frequency band to generate the filling interference signal comprises: generating a modulation signal comprising multiple sub-modulation signals by a random algorithm. The step of generating the filling interference signal by a random algorithm and modulating the modulation signal to subcarriers corresponding to a preset frequency band to generate the filling interference signal comprises: generating a modulation signal comprising multiple sub-modulation signals by a random algorithm. ​ 4. The interference signal generating method according to claim 2, characterized by, ​ ​ ​ 5. The interference signal generating method according to claim 4, characterized by, ​ 6. The interference signal generating method according to claim 2, wherein ​ 7. The interference signal generating method according to claim 2, wherein ​ ​ 8. The interference signal generating method according to claim 2, characterized by, ​ ​ ​ 9. The interference signal generating method according to claim 2, characterized by, ​ ​ ​ 10. The interference signal generating method according to claim 9, characterized by, ​ ​ For each sub-carrier corresponding to the preset frequency band, any one of all the sub-modulation signals is selected for modulation; The signals modulated by all the sub-carriers in the preset frequency band are collectively used as the filling interference signal.

11. The interference signal generating method according to claim 10, wherein The random algorithm adopts a QPSK modulation algorithm.

12. The interference signal generating method of claim 1, wherein The amplitude of the filling interference signal is smaller than the amplitude of the synchronous interference signal.

13. The interference signal generating method according to claim 6, wherein The amplitude of the filling interference signal is half of the amplitude of the synchronous interference signal.

14. The interference signal generating method of claim 1, wherein The amplitudes of the synchronous interference signal and the filling interference signal are adjusted in proportion.

15. The interference signal generating method of claim 1, wherein The method for generating the synchronous interference signal according to the base station signal comprises: acquiring the signal strength of the base station signal; determining whether the signal strength of the base station signal is smaller than or equal to a preset strength, and setting the signal amplitude of the synchronous interference signal as a preset amplitude if the signal strength of the base station signal is smaller than or equal to the preset strength; determining whether the signal strength of the base station signal is greater than the preset strength, and setting the signal amplitude of the synchronous interference signal as greater than the preset amplitude if the signal strength of the base station signal is greater than the preset strength.

16. The interference signal generating method of claim 1, wherein After the step of using the synchronous interference signal and the filling interference signal as interference signals, the method further comprises: acquiring the base station signal in the current environment again; acquiring the latest synchronization signal from the latest acquired base station signal; acquiring the offset value of the synchronous interference signal relative to the latest synchronization signal, so as to correct the position of the synchronous interference signal in the time domain according to the offset value.

17. A signal jamming device, characterized by comprise: a base station signal receiving unit configured to acquire the base station signal in the current environment; a first signal generating unit configured to generate a synchronous interference signal and a filling interference signal according to the base station signal; the synchronous interference signal has the same position in the frequency domain and the time domain as the synchronization signal in the base station signal; the filling interference signal has a different position in the frequency domain and the 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 configured to use the synchronous interference signal and the filling interference signal as interference signals.

18. An electronic device, comprising: comprise a memory and a processor; the memory is configured to store a computer program; the processor is configured to execute the computer program to implement the method according to any one of claims 1 to 16.

19. A computer storage medium having stored thereon a computer program, characterized in that The computer program is executed by the processor to implement the method according to any one of claims 1 to 16.

20. A computer program product, characterised in that, The computer program is executed by the processor to implement the method according to any one of claims 1 to 16.

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