CN115694715A - Satellite communication interference method and device - Google Patents
Satellite communication interference method and device Download PDFInfo
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Abstract
The application discloses a satellite communication interference method and a satellite communication interference device, which are used for solving the problem of low satellite communication interference effectiveness. The scheme provided by the application comprises the following steps: acquiring a position parameter of a region to be interfered and parameter information of a target interference satellite, wherein the parameter information of the target interference satellite comprises the position parameter and a transmitting signal parameter of the target interference satellite; determining an interference execution position according to the position parameter of the to-be-interfered area and the position parameter of the target interference satellite, wherein the interference execution position is located between the to-be-interfered area and the target interference satellite; and sending an interference signal to the area to be interfered based on the interference execution position, wherein the interference signal is generated based on the transmission signal parameter, and the interference signal is used for simulating a signal transmitted by the target interference satellite.
Description
Technical Field
The present application relates to the field of communications, and in particular, to a satellite communication interference method and apparatus.
Background
In the field of satellite communication, a satellite signal receiving terminal can locate a target satellite based on a received satellite signal, and then perform tracking communication on the target satellite. Although the prior art can shield satellite signals through signal shielding rooms, signal shielding cabinets and other devices to block satellite communication, the scheme is limited by space and difficult to realize interference on receiving equipment in an open environment.
Moreover, for an area where satellite signal interference needs to be performed, the existing scheme is difficult to realize targeted and effective interference for the area, and has the disadvantages of high power consumption and poor interference effectiveness.
How to improve the effectiveness of satellite communication interference is a technical problem to be solved by the application.
Disclosure of Invention
The embodiment of the application aims to provide a satellite communication interference method and a satellite communication interference device, which are used for solving the problem of low satellite communication interference effectiveness.
In a first aspect, a satellite communication interference method is provided, including:
acquiring a position parameter of a region to be interfered and parameter information of a target interference satellite, wherein the parameter information of the target interference satellite comprises the position parameter and a transmitting signal parameter of the target interference satellite;
determining an interference execution position according to the position parameter of the to-be-interfered area and the position parameter of the target interference satellite, wherein the interference execution position is located between the to-be-interfered area and the target interference satellite;
and sending an interference signal to the area to be interfered based on the interference execution position, wherein the interference signal is generated based on the transmission signal parameter, and the interference signal is used for simulating a signal transmitted by the target interference satellite.
In a second aspect, a satellite communication jamming device is provided, including:
the acquisition module is used for acquiring the position parameters of a region to be interfered and the parameter information of a target interference satellite, wherein the parameter information of the target interference satellite comprises the position parameters and the transmitting signal parameters of the target interference satellite;
the determining module is used for determining an interference execution position according to the position parameter of the to-be-interfered area and the position parameter of the target interference satellite, wherein the interference execution position is positioned between the to-be-interfered area and the target interference satellite;
and the sending module is used for sending an interference signal to the area to be interfered based on the interference execution position, wherein the interference signal is generated based on the transmission signal parameter, and the interference signal is used for simulating a signal transmitted by the target interference satellite.
In a third aspect, an electronic device is provided, the electronic device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the first aspect.
In a fourth aspect, a computer-readable storage medium is provided, having stored thereon a computer program which, when executed by a processor, carries out the steps of the method as of the first aspect.
In the embodiment of the application, by acquiring the position parameter of the area to be interfered and the parameter information of a target interference satellite, the parameter information of the target interference satellite comprises the position parameter and the transmission signal parameter of the target interference satellite; determining an interference execution position according to the position parameter of the to-be-interfered area and the position parameter of the target interference satellite, wherein the interference execution position is located between the to-be-interfered area and the target interference satellite; and sending an interference signal to the area to be interfered based on the interference execution position, wherein the interference signal is generated based on the transmission signal parameter, and the interference signal is used for simulating a signal transmitted by the target interference satellite. According to the scheme, interference can be executed aiming at the interference area, and the interference signal is sent to the interference area by simulating the signal transmitted by the satellite, so that the receiving antenna in the interference area cannot be positioned to the satellite or cannot analyze the satellite communication signal, and directional and effective satellite communication interference is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1a is a schematic flow chart of a satellite communication interference method according to an embodiment of the present application;
fig. 1b is a schematic structural diagram of an active satellite communication jamming device according to an embodiment of the present application;
fig. 2a is a second schematic flowchart of a satellite communication interference method according to an embodiment of the present application;
FIG. 2b is a schematic diagram illustrating a relationship between an Area to be interfered and a target interfering satellite according to an embodiment of the present application;
FIG. 2c is a second schematic diagram illustrating a relationship between areas to be interfered and target interfering satellites according to an embodiment of the present invention;
fig. 3 is a third flowchart of a satellite communication interference method according to an embodiment of the present application;
fig. 4 is a fourth flowchart illustrating a satellite communication jamming method according to an embodiment of the present application;
fig. 5 is a fifth flowchart illustrating a satellite communication jamming method according to an embodiment of the present application;
fig. 6 is a sixth flowchart illustrating a satellite communication jamming method according to an embodiment of the present application;
fig. 7 is a seventh schematic flow chart of a satellite communication jamming method according to an embodiment of the present application;
FIG. 8 is a schematic illustration of beacon signal or signal level values as a function of antenna azimuth for one embodiment of the present application;
fig. 9 is a schematic structural diagram of a satellite communication jamming device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application. The reference numbers in the present application are only used for distinguishing the steps in the scheme and are not used for limiting the execution sequence of the steps, and the specific execution sequence is described in the specification.
In the technical field of satellite communication, a receiving terminal can determine the position of a target satellite through satellite finding, and then control a receiving antenna to point to the target satellite, so that the signal of the target satellite is stably received to realize satellite communication.
In practical application, the receiving terminal can preliminarily calculate the theoretical azimuth of the target satellite according to the relative position between the receiving terminal and the target satellite, and then perform coarse alignment on the theoretically calculated azimuth, so as to improve the precision and perform fine alignment.
The location of the receiving terminal may be fixed or variable relative to the ground. When the position of the receiving terminal is fixed, the communication mode with the target satellite can be called 'silent center communication'. When the position of the receiving terminal changes, the communication mode with the target satellite can be called 'communication in motion'.
In a satellite communication scenario, it is difficult for the prior art to achieve interference to a receiving device in an open environment. Moreover, for an area where satellite signal interference needs to be performed, the existing scheme is difficult to realize targeted and effective interference for the area, and has the disadvantages of high power consumption and poor interference effectiveness. Among them, since the position of the receiving terminal is constantly changing in the "communication in motion" scenario, it is more difficult to effectively perform satellite communication interference on the moving receiving terminal.
In order to solve the problems in the prior art, the embodiments of the present application provide a satellite communication interference method, and the scheme provided by the embodiments of the present application may be applied to the scenarios of "silent communication" or "communication in motion". As shown in fig. 1a, the method comprises the following steps:
s11: acquiring the position parameters of a region to be interfered and the parameter information of a target interference satellite, wherein the parameter information of the target interference satellite comprises the position parameters and the transmitting signal parameters of the target interference satellite.
The area to be interfered may be a circular, rectangular or irregular closed figure, and in practical application, the area to be interfered may be determined according to a receiving device that needs to perform interference.
For a receiving device to be interfered, the position of the receiving device to be interfered may be determined as a center, and a region not greater than a preset distance from the center may be determined as a region to be interfered.
For a plurality of receiving devices to be interfered, a region can be determined for each receiving device to be interfered, and then the regions corresponding to the receiving devices to be interfered are determined as a region to be interfered together, so that the region to be interfered includes the positions of the receiving devices to be interfered.
The target interference satellite is a target satellite for satellite communication of receiving equipment in an area to be interfered, and the parameter information of the satellite is public information and can be inquired in advance and stored as a database so as to be flexibly called when in use. The parameter information of the target interfering satellite includes but is not limited to: satellite ephemeris, state, signal system, operating mode, orbit information, etc.
Specifically, the transmitted signal parameters may include beacon signal parameters of the target interfering satellite, and may also include satellite television signal (DVB-S/S2) parameters. The transmission signal parameters can characterize the transmission signal of the target interference satellite, and the signal transmitted by the target interference satellite can be simulated based on the transmission signal parameters.
S12: and determining an interference execution position according to the position parameter of the to-be-interfered area and the position parameter of the target interference satellite, wherein the interference execution position is positioned between the to-be-interfered area and the target interference satellite.
The optimal position for executing satellite communication interference in the area to be interfered is the position between the area to be interfered and the target interference satellite. Specifically, the position of the receiving antenna main lobe aligned with the target interference satellite in the to-be-interfered area can be calculated and determined according to the relative position between the to-be-interfered area and the target interference satellite, and then the interference execution position is determined in the position to perform satellite communication interference. Based on the interference execution position, reception of the target interference satellite signal by the receiving antenna in the area to be interfered can be blocked.
S13: and sending an interference signal to the area to be interfered based on the interference execution position, wherein the interference signal is generated based on the transmission signal parameter, and the interference signal is used for simulating a signal transmitted by the target interference satellite.
In this step, a target interference satellite is simulated based on the transmission signal parameters to generate an interference signal, and then the interference signal is sent to the to-be-interfered area based on the interference execution position, so that a real signal and an interference signal transmitted by the target interference satellite are simultaneously received in the main lobe direction of a receiving antenna in the to-be-interfered area, and then the position of the target interference satellite cannot be accurately identified, or the real signal transmitted by the target interference satellite cannot be separated from the received signal, thereby achieving the purpose of satellite communication interference.
In actual execution, because the interference execution position is usually in the air with a certain distance from the ground, the interference signal can be sent to the area to be interfered through the interference execution position of the flight equipment such as the unmanned aerial vehicle in the air. For example, the target satellite beacon signal belongs to a narrow-band (tens of kHz) single carrier signal, and in the scheme, a specific single-frequency sinusoidal signal matched with the transmission signal parameter may be generated and transmitted as an interference signal.
Optionally, an interference signal G baseband signal may be generated in advance according to the transmission signal parameter and stored in a memory of the unmanned aerial vehicle, and after the unmanned aerial vehicle reaches the interference execution position, the interference signal G baseband signal stored in the memory in advance is called by the interference signal generation device and converted into an interference signal G frequency band signal by the frequency converter, and then amplified by the amplifier, so that the transmission of the interference signal is executed by the antenna carried by the unmanned aerial vehicle.
Optionally, the interference signal G baseband signal may be generated in real time, besides a manner of generating the interference signal G baseband signal in advance. After the unmanned aerial vehicle reaches the interference execution position, an interference signal G can be dynamically generated according to the posture of the unmanned aerial vehicle and sent. For a scene of 'quiet center communication', after the position of the receiving terminal changes, the area to be interfered may correspondingly change, the unmanned aerial vehicle can follow the corresponding change of the position of the receiving terminal, generate an interference signal aiming at the receiving terminal in real time and transmit the interference signal, and accordingly dynamic and flexible satellite communication interference is achieved.
An alternative active satellite communication jamming device (101) is provided below, and fig. 1b shows a schematic structural diagram of the active satellite communication jamming device (101), where the schematic structural diagram includes:
an interference signal generating device (201); a memory (202); a frequency converter (203); an amplifier (204); an antenna (205), a communication interface (206).
The interference signal generating device (201) has the functions of flexibly and quickly generating the interference signal G baseband signal and controlling and calculating functions, and can be communicated with external equipment.
The memory (202) is an optional module, and the memory can also be configured inside the interference signal generating device. In case that the baseband signal of the interference signal G needs to be stored in advance, the memory may be configured to store the baseband signal generated in advance. In a scenario where the interference signal is generated in real time, the interference signal may be generated directly by the interference signal generating device without providing the memory. In addition, the memory (202) can be used for storing the parameter information of the known and published target interference satellite, so that the interference signal generating device can call the parameter information at any time and generate the interference signal.
When the memory (202) is configured, the memory is connected with the interference signal generating device (201) in a communication mode, so that the interference signal generating device (201) can conduct reading calling, deleting and other operations on data in the memory (202).
The frequency converter (203) can be used for converting baseband signals into frequency band signals, for example, C, ku, ka are communication frequency bands commonly used in a satellite communication system of communication in motion, and the frequency converter can realize the movement of interference signals G baseband signals and interference signals G frequency band signals of C, ku, ka frequency bands and is configured with at least one frequency converter of C, ku, ka frequency bands. In the 'quiet center-through' scene, the common frequency bands are L and X frequency bands, and in practical application, the frequency converter corresponding to the required frequency band can be selected according to practical requirements.
And the amplifier (204) is used for realizing the signal level amplification of the interference signal G frequency band, so that a receiving antenna in the area to be interfered can receive the interference signal with certain strength, and the receiving terminal is prevented from separating a real signal transmitted by the target interference satellite from the received signal.
And the antenna (205) is used for transmitting the amplified interference signal, and the corresponding antenna can be selected according to the frequency band to be interfered actually. The characteristics of the selected antenna, such as frequency range, polarization characteristic and the like, can be configured according to the requirements of a beacon signal and/or a satellite television signal (DVB-S/S2) corresponding to a target interference satellite, so that the transmitted interference signal is closer to a real signal transmitted by the target interference satellite.
In addition, the direction of the antenna can be configured according to needs, for example, a directional antenna or a directional adjustable antenna is selected, and directional or specific area interference can be realized. When the directional antenna is used, the antenna can send interference signals to an area to be interfered by adjusting the attitude of the unmanned aerial vehicle. When the directivity-adjustable antenna is used, the interference signal can be transmitted to the area to be interfered by adjusting the antenna directivity.
And a communication interface (206) with one end connected with the interference signal generating device (201) and the other end capable of communicating with an external device. In practical applications, the interference signal generating device may be configured or sent instructions to be executed through the communication interface, so as to control the active satellite communication interference device. For example, which satellite is the target interfering satellite may be specified through the communication interface, an area to be interfered may be specified through the communication interface, or a time period for performing interference may be specified.
Optionally, the scheme may use a Software Defined Radio (SDR) platform in combination with corresponding program Software to generate the interference signal G baseband signal. The scheme can be widely applied to the field of satellite communication, the field of electronic countermeasure or the field of radio interference, and the effectiveness of satellite communication interference can be remarkably improved through the scheme provided by the embodiment of the application. According to the scheme, interference can be executed aiming at the interference area, and the interference signal is sent to the interference area by simulating the signal transmitted by the satellite, so that the receiving antenna in the interference area cannot be positioned to the satellite or cannot analyze the satellite communication signal, and directional and effective satellite communication interference is realized.
The scheme can be applied to application scenes of 'static communication' and 'communication in motion', and in the two scenes, a satellite communication system is required to be provided with a satellite searching and tracking device for enabling a main lobe of a receiving antenna to be aligned to a satellite in real time to realize stable communication.
The satellite communication system for communication in motion is usually deployed on a carrier to realize mobile communication, a large physical aperture antenna cannot be adopted, and the common communication frequency band is C/Ku/Ka.
Wherein, C frequency band (4 to 8 GHz) satellite communication: the frequency band is 5850-6425MHz/3625-4200MHz, is little influenced by rainfall, has larger ground station antenna caliber of 2.4-3m, and is mainly used for 'static center communication'.
The Ku frequency band (12 to 18GHz) satellite communication comprises the following components: the antenna is mainly used for satellite communication, the frequency band of 14.0-14.25GHz/12.25-12.75GHz is mostly used for Fixed Satellite Service (FSS), the frequency band of 11.7-12.2GHz is mostly used for Broadcast Satellite Service (BSS), and the aperture of a receiving terminal antenna is about 1 m.
Wherein, ka frequency band (26.5 to 40GHz) satellite communication: mainly used for satellite communication, high throughput communication satellites (HTS) mostly allocate frequency bands of 27.7-29.5GHz/17.7-19.7GHz to ground stations, and allocate frequency bands of 29.5-30.0GHz/19.7-20.2GHz to receiving terminals. The receiving terminal can use 0.75m antenna, and its receiving/transmitting speed can reach 50/5Mbps.
For a satellite communication system of 'static-to-center communication', the position and the attitude of an antenna feeder system of a receiving terminal are unchanged, and because the position of a satellite can change constantly, the antenna feeder system is required to be controlled by a satellite searching and tracking device, so that the main lobe of an antenna is always aligned with the satellite.
For the satellite communication system, the antenna feeder system is located in the carrier, and the position and the coordinate change all the time, in order to make the antenna main lobe always align to the satellite, the position and the coordinate of the carrier must be measured, and the angle parameter of the antenna feeder system aligning to the target satellite must be calculated accordingly.
Based on the international telecommunication union regulation, the Ku frequency band antenna main lobe satellite alignment error is less than 0.2 degrees, when the antenna pointing error is more than 0.5 degrees, the transmitting level must be reduced in the transmitting mode to avoid interference with adjacent satellites, and when the antenna pointing error is more than 0.5 degrees, the signal-to-noise ratio of a received signal may be greatly reduced in the receiving mode. According to the scheme, an active satellite communication interference device is used for simulating and generating and radiating an interference signal G which is the same as a target satellite public beacon signal and a satellite television signal (DVB-S/S2), a regional satellite communication interference system which is deployed in a region is constructed by combining a main lobe optimal interference position selection method, and a satellite communication active interference method is used for interfering a satellite searching and tracking device of a receiving terminal, so that the satellite searching and tracking device cannot be correctly aligned with the target satellite or mistakenly tracks the interference signal G, and the purpose of interfering satellite communication is achieved.
Based on the solution provided by the foregoing embodiment, optionally, as shown in fig. 2a, step S12 includes:
s21: determining a target communication angle parameter of the area to be interfered according to the position parameter of the area to be interfered and the position parameter of the target interference satellite, wherein the communication angle parameter comprises a pitch angle of a receiving antenna
Azimuth angle of the magnetic field
And angle of polarization
。
The target communication angle parameter of the area to be interfered is the communication angle parameter of the satellite communication receiving antenna positioned in the area to be interfered. The target communication angle parameter can be used to characterize the direction in which the receiving antenna is pointing at the target interfering satellite.
In the communication angle parameter, the pitch angle is used to represent the angle between the receiving antenna and the horizontal plane at the position. The azimuth angle is used to indicate the angle of rotation of the receiving antenna in the horizontal plane of the position, and can be expressed by longitude. The polarization angle is the difference between the polarization angle of the signal received by the receiving antenna and the polarization angle of the signal transmitted by the satellite. Taking a satellite located above the equator as an example, whose transmitted signal includes both horizontal and vertical directions, only receiving devices located at the equator will receive signals with unchanged polarization angles, while receiving signals at other latitudes will receive signals with changed angles, i.e. the polarization angles mentioned above.
S22: and determining an origin according to the position parameters of the region to be interfered, and determining the interference execution position in the direction pointed by the target communication angle parameters of the origin.
In the scheme, the interference execution position is determined by using the direction pointed by the receiving antenna, so that an interference signal is sent to an area to be interfered by equipment such as an aircraft in the main lobe direction of the receiving antenna, and the interference of satellite communication is realized.
With the active satellite communication jamming device (101) provided by the above embodiment, when the jamming signal G baseband signal forms the jamming signal G frequency band signal through the frequency converter (203), the polarization angle of the jamming signal is set
For the angle of polarisation in the above step
Then the radiation is carried out after passing through an amplifier (204) and an antenna (205). And a pitch angle
And azimuth angle
The method can be realized by adjusting the attitude of the active satellite communication interference device (101) and adjusting the attitude of the antenna (205).
An alternative solution for determining the interference execution position is provided in the embodiment of the present application, and fig. 2b shows the relationship between the Area to be interfered (shown by dotted shading) and the target interference satellite position.
First, a target satellite to be interfered, i.e., a target interfering satellite, is determined in step S11 of the embodiment of the present application. And acquiring the public information and necessary parameters of the target satellite and determining the position parameters of the Area to be interfered.
Wherein, the target satellite public information comprises: height H of target satellite, longitude of target satellite
(ii) a The necessary parameters include at least: the radius of the earth R. The Area parameter of the Area to be interfered at least comprises: geometric center longitude of Area to be interfered
Latitude of degree of freedom
。
Firstly, a geographical coordinate system of the target satellite in the Area to be interfered is calculated according to the following formula 1
Middle coordinate value
Wherein, in the step (A),
。
Then, an initial pitch angle at which the receiving terminal in the Area to be interfered wants to communicate with the target satellite is calculated according to equation 2
Angle of polarization
Azimuth angle
(geographical coordinate System)
）。
Then, in a geographic coordinate system
The position of the interference signal G is set, and the azimuth angle of the interference signal G is set
Equal to the initial azimuth
. And, given the height of the interference signal G
Or the horizontal distance Jg between the interference signal G and the geometric center of the Area to be interfered is any parameter, so that the two satisfy the following formula 3:
tan
=
(formula 3)
The POS _ G executing position is the same as the latitude, longitude and azimuth of the target satellite according to the interference
R, and the like, and the POS _ G in the geographic coordinate system is calculated according to the formula 1
Middle coordinate value
。
Subsequently, when performing interference, only the interference signal G needs to be deployed in the geographical coordinate system
Middle coordinate value
Namely, the POS _ G point can make the interference signal G be located in the main lobe (small range airspace Y) of the receiving terminal antenna in the area to be interfered, thereby realizing targeted execution of satellite communication interference in the area to be interfered.
Further, the embodiment of the present application further provides an estimation method of the deployment position height and the orientation error of the interference signal G, which may be used to further improve the interference accuracy, see fig. 2c.
For a receiving terminal located in the Area to be interfered, the half power lobe width (HPBW) of the antenna feeder system of the receiving terminal is shown as formula 4.
HPBW =70 λ/D (formula 4)
Wherein HPBW represents half power lobe width in degrees; λ represents wavelength, in m; d represents the antenna physical aperture size diameter in m.
In practical application, the HPBW of the Ku-band antenna feeder system is between 1.16 and 1.75 degrees; the HPBW of the Ka-band antenna feeder system is 0.7-1.05 degrees; the deployment position height error Err and HPBW,
The estimated relationship therebetween is shown in the following equation 5.
Err=HPBW×0.01745×
(formula 5)
With HPBW =1 °,
=500m, i.e. the interference signal G only needs to be deployed within the altitude error Err =8.7m centered on POS _ G, and can enter the main lobe of the receiving terminal antenna. As can be seen, the deployment position error of the interference signal G is ± HPBW.
Based on the azimuth error calculated by the embodiment, in practical application, the active satellite communication interference device can be combined with the unmanned aerial vehicle system on the basis of unknown execution of interference determination, so that fixed-point and following interference can be realized.
Specifically, the system consists of an unmanned aerial vehicle (which can comprise a positioning and attitude determining system), a control station, an active satellite communication interference device and a stable holder.
Firstly, install active satellite communication jamming unit at stable cloud platform, whole unmanned aerial vehicle as load carrying. Then, a geographic coordinate system corresponding to the POS _ G point is obtained
Middle coordinate value
And the control station guides the unmanned aerial vehicle to hover at a POS _ G point through a closed-loop control fixed point according to the positioning and attitude determination system, and the height and azimuth errors are positioned in the Err. Then, the stable tripod head is controlled to ensure the interference signal G pitch angle
Angle of polarization
Azimuth angle
And (4) stabilizing. And finally, controlling the active satellite communication interference device to generate and radiate an interference signal G so as to realize satellite communication interference aiming at the area to be interfered.
Based on the solution provided by the foregoing embodiment, optionally, as shown in fig. 3, the position parameter of the area to be interfered includes longitude and latitude coordinate values of a plurality of edge feature points of the area to be interfered;
wherein, the step S21 includes:
s31: and respectively determining the communication angle parameters of the edge feature points according to the longitude and latitude coordinate values of the edge feature points and the position parameters of the target interference satellite.
In this example, the edge feature point may be, for example, a feature point such as a geometric vertex, a geometric edge midpoint, and the like of the region to be interfered, and the edge feature point is used to characterize a contour of the region to be interfered.
S32: and determining a target communication angle parameter of the to-be-interfered area according to the communication angle parameters of the edge feature points.
The longitude of the geometric center of Area of the Area to be interfered is provided in the embodiment
Latitude of degree of latitude
Calculating pitch angle
Angle of polarization
Azimuth angle
The method of (1). To make the calculation more accurate, Q feature points (index Q, { Q epsilon [0, Q-1) can be set on the geometric edge of the Area to be interfered]| q ∈ N }) feature point longitude
,…,
Latitude and longitude
,…,
And calculating the total Q groups of angle values according to the formula 1 and the formula 2 in the above embodiment (
,
,
) And taking the average value as the pitch angle
Angle of polarization
Azimuth angle
Therefore, more accurate target communication angle parameters are obtained.
Through the scheme provided by the embodiment of the application, more reasonable target communication angle parameters can be determined for the interference area with irregular outline, so that effective satellite communication interference can be realized at each position in the area to be interfered, and the overall effectiveness of satellite communication interference is improved.
Based on the solution provided by the foregoing embodiment, optionally, as shown in fig. 4, the foregoing step S22 includes:
s41: and determining the geometric center of the area to be interfered as the origin.
As shown by the origin O in fig. 2b, 2c, the set center of the interference region is determined as the origin in order to determine the interference execution position between the two points.
S42: and determining a target distance between an interference execution position and the origin according to a circumscribed circle of the area to be interfered, wherein the area of the circumscribed circle is in positive correlation with the target distance.
In the embodiment of the application, in order to realize satellite communication interference at any position in the to-be-interfered area, the distance between the interference execution position and the to-be-interfered area can be determined based on the circumscribed circle of the to-be-interfered area. For the same type of transmitting antenna carried on the unmanned aerial vehicle, on the premise that the transmitting power is enough to meet the requirement, the farther the interference execution position is from the to-be-interfered area, the larger the actual range interfered by satellite communication is.
S43: and determining a position where a distance from the origin in a direction indicated by the target communication angle parameter of the origin is the target distance, as the interference execution position.
Taking fig. 2b as an example, the target distance is the linear distance between the origin O and POS _ G, and through the scheme provided in the embodiment of the present application, a reasonable target distance can be determined, and on the one hand, the target distance can ensure that the satellite communication interference can comprehensively cover the area to be interfered, and on the other hand, the requirement for signal transmission power can be reduced, thereby ensuring that the satellite communication interference is effective, and also reducing power consumption.
Based on the solution provided by the foregoing embodiment, optionally, as shown in fig. 5, the foregoing step S13 includes:
s51: and generating a satellite simulation signal based on the transmission signal parameters, wherein the satellite simulation signal is used for simulating the signal transmitted by the target interference satellite.
In the solution provided in the embodiment of the present application, the satellite analog signal may specifically be an interference signal G baseband signal. The satellite analog signal may be pre-stored in memory and recalled directly at the time of use, or may be generated in real time.
S52: and acquiring attitude information of the interference antenna, wherein the attitude information is used for representing the attitude of the interference antenna relative to the ground.
The interfering antenna described in this step may be the antenna (205) shown in fig. 1b for transmitting the interfering signal. The attitude information may specifically characterize the attitude of the interfering antenna relative to the ground at its coordinates.
S53: and generating the interference signal according to the attitude information of the interference antenna and the satellite simulation signal, wherein the interference signal is used for simulating the signal transmitted by the target interference satellite and received by the receiving antenna of the to-be-interfered area.
In this step, the satellite analog signal is adjusted according to the acquired attitude information to generate an interference signal. Therefore, interference signals received by the receiving antenna in the interference area are closer to real signals transmitted by a target interference satellite, and the problem that the interference effect on the receiving antenna is poor due to the attitude change of the interference antenna is solved.
S54: and sending the interference signal to the area to be interfered through an interference antenna based on the interference execution position.
According to the scheme provided by the embodiment of the application, the interference signal is generated based on the attitude information of the interference antenna, so that the generated interference signal can make up for the negative influence on the interference effect possibly caused by the change of the attitude of the antenna. The scheme can further improve the satellite interference effectiveness of the area to be interfered.
Based on the solution provided by the foregoing embodiment, optionally, as shown in fig. 6, before the foregoing step S13, the method further includes:
s61: acquiring a receiving level range of a receiving terminal in the region to be interfered;
s62: determining the target signal strength of the interference signal according to the receiving level range and the region to be interfered;
wherein, the step S13 includes:
s63: and sending the interference signal of the target signal strength to the area to be interfered based on the interference execution position, wherein the interference signal of the target signal strength is used for saturating the receiving level of a receiving terminal in the area to be interfered.
The scheme provided by the embodiment of the application is used for realizing constant saturation level interference and enabling the signal level of the interference signal G to reach the receiving terminal
Far greater than the signal level of the target satellite beacon signal and/or satellite television signal (DVB-S/S2) when the signal reaches the receiving terminal
。
With respect to signal level of a target satellite beacon signal and/or a satellite television signal (DVB-S/S2) signal when it reaches a receiving terminal
The value setting is, for example, that the receiving level range of the receiver beacon in the area to be interfered is-100 dBm to-50dBm, and the receiving level range of the DVB-S and DVB-S2 is-65 dBm to-25 dBm.
Maintaining interference signal G level
The target signal strength is constantly greater than-25 dBm, which may be-10 dBm, for example, so that the level of the beacon signal and/or satellite television signal (DVB-S/S2) receiver configured by the receiving terminal is saturated, the DC voltage corresponding to the angle change is saturated, and the servo system cannot be controlled, which causes satellite finding error to achieve the purpose of satellite communication interference.
Based on the solution provided by the foregoing embodiment, optionally, as shown in fig. 7, step S13 includes:
s71: and sending the interference signal to the to-be-interfered area from a random position in a preset area based on the interference execution position, wherein the interference execution position is the central position of the preset area.
The scheme provided by the embodiment of the application is used for realizing position change interference. For example, based on the receiver described in the above embodiment, the interference signal G level is set as: -50dBm (beacon reception level) or-25 dBm (DVB-S and DVB-S2 reception levels) to ensure that the receiver can correctly receive interfering signals G at levels higher than the beacon and or satellite television signal (DVB-S/S2) receiver levels. Meanwhile, the unmanned aerial vehicle is controlled to randomly move in a small range around the POS _ G point, the range can be preset to simulate a target satellite, the receiving terminal antenna feeder system is induced to continuously seek and track along with the movement of an interference signal G, and the target satellite cannot be correctly locked so as to achieve the purpose of satellite communication interference.
The present solution is further described below in conjunction with the particular manner in which the receiver performs satellite communications.
The receiver usually comprises a satellite finding and tracking device for performing satellite finding and satellite tracking, and the main lobe of the antenna needs to be ensured to be aligned with the satellite, and the satellite communication process is mainly divided into a fast satellite finding stage and a stable tracking stage.
In the quick satellite finding stage, after the receiving terminal is powered on, the satellite finding and tracking device immediately enters the quick satellite finding stage to realize initial satellite alignment, and static initial acquisition and dynamic initial acquisition can be performed according to the state of a carrier when an initial satellite alignment program is started.
The static initial capture means that the carrier is static, and the implementation steps comprise: (1) initially finding stars; (2) coarse alignment; (3) fine alignment;
the dynamic initial capture refers to the movement of a carrier, and the implementation steps comprise: (1) stably keeping the carrier; (2) initially finding stars; (3) coarse alignment; (4) fine alignment; the purpose of increasing the stability of the carrier is to keep the directivity of the antenna feeder system unchanged in a geographic coordinate system within a period of time, so as to substantially achieve the condition required by static initial capture.
In the initial satellite finding step, firstly, theoretical calculation satellite finding, satellite beacon signal satellite finding and satellite television signal (DVB-S/S2) satellite finding are carried out. Engineering methods are mostly a combination of one or more of the above.
In the step of theoretically calculating and finding the satellite, the satellite finding and tracking device obtains the pitch angle required by the antenna main lobe pointing to the target satellite at the moment t by combining the positioning and attitude determining system according to the prestored target satellite public information and the current time, longitude and latitude and height
Azimuth angle of the magnetic field
Angle of polarization
。
In the satellite beacon signal searching step, a beacon signal phase-locked receiver is configured to output different beacon signal level values A according to different pointing directions of an antenna main lobe, when the antenna main lobe is over against a satellite, the beacon signal phase-locked receiver outputs the maximum level value A, and the monitoring satellite beacon receiver outputs the level value A to guide the target satellite to point.
In the satellite searching step of the satellite television signal (DVB-S/S2), a digital tuner matched with a target satellite can be configured to form a signal feedback system, and different beacon signal level values A are output according to different directions of an antenna main lobe.
In the initial satellite finding step, firstly, the target satellite beacon signal center frequency is measured
Or satellite television signal (DVB-S/S2) signal characteristic values are loaded into a beacon signal lock-in receiver or digital tuner, such that it can lock onto the target satellite beacon signal or satellite television signal (DVB-S/S2) and output target satellite signal strength information corresponding thereto. Then, according to the public information of the target satellite and the attitude and position information of the carrier, the controller calculates and obtains an initial pitch angle required for pointing to the airspace of the target satellite
Azimuth angle
Angle of polarization
. Finally, the servo system points the antenna feeder system to a target satellite airspace according to the initial pitch angle and the polarization angle;
in the coarse alignment step, the initial azimuth angle is searched by the servo system rotating at a certain speed
And monitoring and storing the signal intensity information of the target satellite at each azimuth angle within a certain range nearby, checking whether the signal intensity information is greater than a preset threshold value, and judging whether the target satellite is searched.
Under the premise of coarse alignment, the initial azimuth angle needs to be further searched by adopting modes of step scanning, cone scanning and the like
And adjusting the pitch angle, the polarization angle and the azimuth angle within a small-range airspace within a certain range nearby until the signal intensity information of the target satellite reaches the maximum value within the small-range airspace, thereby realizing precise alignment.
When the satellite searching and tracking device uses a beacon signal or a satellite television signal (DVB-S/S2) to search and track, the beacon signal output by the beacon signal phase-locked receiver or the DVB-S/S2 signal level value a output by the digital tuner changes with the azimuth angle of the antenna (for example, the azimuth angle is assumed to be unchanged, the pitch angle and the polarization angle have the same principle, and are not described again), as shown in fig. 8. After the level threshold is preset, the azimuth of the target satellite can be obviously acquired to be located at n degrees in the azimuth-level value graph. According to the beacon signal or DVB-S/S2 signal level value at the moment
The star finding is successful.
Subsequently, in a stable tracking stage, if the satellite searching and tracking device can stably realize the fine alignment in the T time period, entering the stable tracking stage, and comprising the following steps:
(1) The controller controls a servo system according to the attitude and position information of the carrier and the signal intensity information of the target satellite, and realizes the step-by-step alignment of the antenna feeder system to the target satellite quickly, accurately and in the smallest steps according to different step methods, wherein the tracking methods generally comprise step tracking, cone scanning tracking, single pulse tracking and the like;
(2) The controller needs to correct the accumulated error of the positioning and attitude determining system, so as to avoid the star loss;
(3) If the signal path has a shielding condition, keeping a tracking state to wait for the shielding to disappear;
(4) If the signal is judged to be lost, a rapid satellite finding stage is executed or a reacquisition process is entered.
Therefore, the main lobe of the antenna is already pointed to the small-range airspace Y where the target satellite is located through the processes of star finding, coarse alignment and fine alignment. Meanwhile, the coarse alignment and the fine alignment ensure that the satellite is searched in the small-range airspace Y, and because a directional and low-sidelobe antenna feeder system is adopted, the interference effect of an interference signal G outside the small-range airspace Y on a receiving terminal is poor.
Furthermore, the satellite communication system of "communication in motion" makes interference signal G difficult to interfere with the satellite finding and tracking process in real time due to the change of the position of the carrier.
For the above satellite communication mode, in the scheme provided by the embodiment of the present application, effective interference of satellite communication is realized from the following aspects:
1. a valid interference signal G is generated and transmitted.
In the embodiment of the application, a software radio platform and software can be used for forming an interference signal generating device, an active satellite communication interference device is formed by combining a memory, a frequency converter, an amplifier and an antenna, an interference signal G is generated and radiated by using a method of simulating and radiating a beacon signal and a satellite television signal (DVB-S/S2), and a polarization angle of the interference signal G is set
Equal to the initial angle of polarization
To transmit a valid interference signal to the receiver.
2. And determining an effective interference execution position.
In a geographical coordinate system
In the method, the public information and necessary parameters of the target satellite are known, then the parameters of the Area to be interfered are given, and the initial pitch angle of the receiving terminal in the Area to be interfered for communicating with the target satellite can be calculated
Angle of polarization
Azimuth angle
And further confirm in the geographic coordinate system
In the method, an interference signal G is deployed at a proper position POS _ G by adopting a proper means, so that the interference signal G is positioned in a main lobe (a small-range airspace Y) of a receiving terminal antenna.
3. The transmission of the interference signal G is effectively realized based on a satellite communication interference system.
In order to realize the arrangement of the interference signal G at a proper position, the scheme combines an active satellite communication interference device with an unmanned aerial vehicle and stabilizes the pitch angle of the interference signal G by utilizing a stabilizing cradle head
Angle of polarization
Azimuth angle
The problem of deployment of interference signals G at POS _ G points in practical application is solved.
4. Effective satellite communication active interference is performed.
And realizing the interference of the receiving terminal by adopting a constant saturation level interference method and an interference signal G position change interference method.
With the above arrangement, the interference signal G can implement effective interference to the receiving terminal in the Area where interference is to be implemented. Further, when the change of the interference Area is to be carried out, only the initial pitch angle needs to be recalculated
Angle of polarization
Azimuth angle of the magnetic field
And are combinedAnd by adopting a proper means, the interference signal G is deployed at a proper position again, so that the interference area transformation or the following interference is realized.
In order to solve the problems in the prior art, an embodiment of the present invention further provides a satellite communication jamming device 90, as shown in fig. 9, including:
the acquiring module 91 acquires a position parameter of a region to be interfered and parameter information of a target interference satellite, wherein the parameter information of the target interference satellite includes a position parameter and a transmission signal parameter of the target interference satellite;
a determining module 92, configured to determine an interference performing position according to the position parameter of the to-be-interfered area and the position parameter of the target interfering satellite, where the interference performing position is located between the to-be-interfered area and the target interfering satellite;
a sending module 93, configured to send an interference signal to the to-be-interfered area based on the interference execution position, where the interference signal is generated based on the transmission signal parameter, and the interference signal is used to simulate a signal transmitted by the target interfering satellite.
According to the device provided by the embodiment of the application, interference can be executed aiming at the interference area, and the interference signal is sent to the interference area by simulating the signal transmitted by the satellite, so that the receiving antenna in the interference area cannot be positioned to the satellite or cannot analyze the satellite communication signal, and directional and effective satellite communication interference is realized.
The modules in the device provided by the embodiment of the present application may also implement the method steps provided by the method embodiment. Alternatively, the apparatus provided in the embodiment of the present application may further include other modules besides the modules described above, so as to implement the method steps provided in the foregoing method embodiment. The device provided by the embodiment of the application can achieve the technical effects achieved by the method embodiment.
Preferably, an embodiment of the present application further provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the above-mentioned satellite communication interference method embodiment, and can achieve the same technical effect, and details are not repeated here to avoid repetition.
The embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the above-mentioned satellite communication interference method embodiment, and can achieve the same technical effects, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus comprising the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (10)
1. A satellite communication jamming method, comprising:
acquiring a position parameter of a region to be interfered and parameter information of a target interference satellite, wherein the parameter information of the target interference satellite comprises the position parameter and a transmitting signal parameter of the target interference satellite;
determining an interference execution position according to the position parameter of the to-be-interfered area and the position parameter of the target interference satellite, wherein the interference execution position is located between the to-be-interfered area and the target interference satellite;
and sending an interference signal to the area to be interfered based on the interference execution position, wherein the interference signal is generated based on the transmission signal parameter, and the interference signal is used for simulating a signal transmitted by the target interference satellite.
2. The method of claim 1, wherein determining an interference performing location based on the location parameters of the area to be interfered and the location parameters of the target interfering satellite comprises:
determining target communication angle parameters of the to-be-interfered area according to the position parameters of the to-be-interfered area and the position parameters of the target interference satellite, wherein the communication angle parameters comprise a pitch angle, an azimuth angle and a polarization angle of a receiving antenna;
and determining an origin according to the position parameters of the area to be interfered, and determining the interference execution position in the direction pointed by the target communication angle parameter of the origin.
3. The method of claim 2, wherein the location parameters of the area to be interfered comprise longitude and latitude coordinate values of a plurality of edge feature points of the area to be interfered;
determining a target communication angle parameter of the to-be-interfered area according to the position parameter of the to-be-interfered area and the position parameter of the target interference satellite, wherein the determining of the target communication angle parameter of the to-be-interfered area comprises the following steps:
according to the longitude and latitude coordinate values of the edge feature points and the position parameters of the target interference satellite, respectively determining communication angle parameters of the edge feature points;
and determining a target communication angle parameter of the to-be-interfered area according to the communication angle parameters of the edge feature points.
4. The method as claimed in claim 3, wherein determining an origin from the location parameter of the area to be interfered, and determining the interference execution location in the direction indicated by the target communication angle parameter of the origin, comprises:
determining the geometric center of the area to be interfered as the origin;
determining a target distance between an interference execution position and the origin according to a circumscribed circle of the to-be-interfered area, wherein the area of the circumscribed circle is positively correlated with the target distance;
determining, as the interference performing position, a position at which a distance from the origin in the direction indicated by the target communication angle parameter of the origin is the target distance.
5. The method of claim 1, wherein sending the interference signal to the area to be interfered based on the interference performing location comprises:
generating a satellite simulation signal based on the transmission signal parameters, wherein the satellite simulation signal is used for simulating a signal transmitted by the target interference satellite;
acquiring attitude information of an interference antenna, wherein the attitude information is used for representing the attitude of the interference antenna relative to the ground;
generating the interference signal according to the attitude information of the interference antenna and the satellite simulation signal, wherein the interference signal is used for simulating a signal transmitted by the target interference satellite and received by a receiving antenna of the area to be interfered;
and sending the interference signal to the area to be interfered through an interference antenna based on the interference execution position.
6. The method of claim 1, wherein prior to sending the interference signal to the area to be interfered based on the interference performing location, further comprising:
acquiring a receiving level range of a receiving terminal in the region to be interfered;
determining the target signal strength of the interference signal according to the receiving level range and the region to be interfered;
wherein sending the interference signal to the to-be-interfered area based on the interference execution position comprises:
and sending the interference signal of the target signal strength to the area to be interfered based on the interference execution position, wherein the interference signal of the target signal strength is used for saturating the receiving level of a receiving terminal in the area to be interfered.
7. The method of claim 1, wherein sending the interference signal to the area to be interfered based on the interference performing position comprises:
and sending the interference signal to the to-be-interfered area from a random position in a preset area based on the interference execution position, wherein the interference execution position is the central position of the preset area.
8. A satellite communication jamming device, comprising:
the acquisition module is used for acquiring the position parameters of a region to be interfered and the parameter information of a target interference satellite, wherein the parameter information of the target interference satellite comprises the position parameters and the transmitting signal parameters of the target interference satellite;
the determining module is used for determining an interference execution position according to the position parameter of the to-be-interfered area and the position parameter of the target interference satellite, wherein the interference execution position is positioned between the to-be-interfered area and the target interference satellite;
and the sending module is used for sending an interference signal to the area to be interfered based on the interference execution position, wherein the interference signal is generated based on the transmission signal parameter, and the interference signal is used for simulating a signal transmitted by the target interference satellite.
9. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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