Dense disturbance deception jamming method and system for radar network

Abstract

The invention discloses a dense disturbance deception jamming method and system for a radar net, relates to the technical field of electronic countermeasure, and aims to solve the problem that in the prior art, single distance deception cannot form an effective jamming effect on the radar net, and the like, the method comprises the following steps: acquiring position information of each radar in the radar net; scanning beam width or view field range of each radar; the method comprises the following steps of: generating dense false targets by a plurality of jammers according to own equipment capability in a crossed region of target detection scanning by a radar network; therefore, an electronic interference cloud is formed, and a combined explosion effect can be caused to a fusion center of the radar network. According to the method, a large number of dense false targets can be generated in a small range to disturb homologous detection of the radar net, and the effect of collaborative cheating on the radar net is achieved.

Description

Technical Field

[0001] The present invention relates to a radar network-oriented dense disrupting, deceiving, and jamming method and system, belonging to the technical field of electronic countermeasures. Background Art

[0002] With the development of intelligent modern electronic warfare equipment, early warning and detection systems have evolved from single-station radar detection to multi-radar networked collaborative detection. Networked radar systems significantly improve anti-interference capabilities and target detection accuracy in complex electromagnetic environments, effectively countering traditional single-station deception jamming.

[0003] Therefore, implementing effective deception and interference on networked radars is an important issue that needs to be solved urgently, and it is of great significance for aerial platforms to successfully penetrate networked radars in electronic countermeasure environments.

[0004] Implementing a single distance deception on the radar network is difficult to break through the radar network's "same-source detection" mechanism based on multi-source information fusion, it is difficult to reduce the radar network's fusion efficiency and effect, and it is impossible to form effective interference on the radar network. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method and system for dense jamming and deception interference of radar networks, which can generate a large number of dense false targets in a small range, aiming to disrupt the "same-source detection" of the radar network, thereby forming a collaborative deception effect on the radar network.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0007] In a first aspect, the present invention provides a radar network-oriented dense jamming and deception interference method, comprising:

[0008] Obtain the location information of each radar in the radar network, as well as the azimuth beam width of each radar;

[0009] Based on the radar's position information and beam width, determine the intersection area of ​​each radar beam in the radar network, and obtain the vertex coordinates of the intersection area;

[0010] The geometric center coordinates of the intersection area are calculated based on the vertex coordinates. Jammers with only range deception capabilities are deployed in a set area near the geometric center, and jammers with both range and angle deception capabilities are deployed in a set area around the geometric center.

[0011] For jammers deployed near the geometric center, equally spaced false targets are generated along the radial direction between them and each radar. For jammers deployed around the geometric center, false targets with angle offsets are generated by cross-eye or centroid flashing methods.

[0012] By filling the intersection area with the false targets, the radar network fusion center will fail to function properly when performing point trace correlation inspection because the number of paired combinations exceeds the system processing capacity.

[0013] Furthermore, the position information of the radar includes two-dimensional position coordinates.

[0014] Furthermore, the determining of the intersection area of ​​each radar beam in the radar network based on the radar position information and beam width, and obtaining the vertex coordinates of the intersection area, includes:

[0015] Obtain the beam parameters of each radar in the radar network through reconnaissance aircraft, including the radar's location information, azimuth beam width and beam pointing;

[0016] Based on the beam parameters, the polygonal boundaries of each radar beam coverage are calculated to determine the intersection area. , and extract The vertex coordinates are , .

[0017] Furthermore, the geometric center coordinates of the intersection area are calculated based on the vertex coordinates of the intersection area, and the formula is as follows:

[0018] ;

[0019] in, are the geometric center coordinates.

[0020] Furthermore, for the jammer deployed near the geometric center, equally spaced false targets are generated along the radial direction between the jammer and each radar. The position coordinates of the false targets are:

[0021] ;

[0022] ;

[0023] in, is the position coordinate of the false target deployed at the geometric center, are the jammer coordinates, , , Indicates the distance between each false target, For the The angle information between the radar and the jammer, , For the The farthest distance between a radar and each vertex in the intersection area, , For the The shortest distance between each radar and each vertex in the intersection area, The expression is .

[0024] Furthermore, the jammers deployed around the geometric center generate false targets with angle offsets by using the cross-eye or centroid flashing method. The position coordinates of the false targets are:

[0025] ;

[0026] ;

[0027] in, are the position coordinates of the false targets deployed around the geometric center, are the jammer coordinates, , , Represents the offset of the jammer relative to the geometric center and satisfies, , r is the preset maximum offset radius, It is the angle between the false target point trace and the radar meridian direction and the meridian direction between the radar and the jammer.

[0028] In a second aspect, the present invention provides a radar network-oriented dense jamming and deception jamming system, comprising:

[0029] The information acquisition module is used to obtain the position information of each radar in the radar network and the azimuth beam width of each radar;

[0030] A beam intersection area confirmation module is used to determine the intersection area of ​​each radar beam in the radar network based on the radar's position information and beam width, and obtain the vertex coordinates of the intersection area;

[0031] The jammer deployment module is used to calculate the coordinates of the geometric center of the intersection area based on the vertex coordinates of the intersection area, deploy jammers with only distance deception capabilities in a set area near the geometric center, and deploy jammers with distance and angle deception capabilities in a set area around the geometric center;

[0032] The false target generation module is used to generate equally spaced false targets along the radial direction between the jammer deployed near the geometric center and each radar, and to generate false targets with angle offsets by using the cross-eye or centroid flashing method for jammers deployed around the geometric center.

[0033] The deception jamming module fills the intersection area with the false targets, so that the radar network fusion center fails to function properly when performing point trace correlation inspection because the number of paired combinations exceeds the system processing capacity.

[0034] Furthermore, in the jammer deployment module, the geometric center coordinates of the intersection area are calculated based on the vertex coordinates of the intersection area. The formula is as follows:

[0035] ;

[0036] in, are the geometric center coordinates, are the vertex coordinates of the intersection area, .

[0037] Furthermore, in the false target generation module, for the jammer deployed near the geometric center, false targets with equal spacing are generated along the radial direction between the jammer and each radar. The position coordinates of the false targets are:

[0038] ;

[0039] ;

[0040] in, is the position coordinate of the false target deployed at the geometric center, are the jammer coordinates, , , Indicates the distance between each false target, For the The angle information between the radar and the jammer, , For the The farthest distance between a radar and each vertex in the intersection area, , For the The shortest distance between each radar and each vertex in the intersection area, The expression is .

[0041] Furthermore, in the false target generation module, for the jammers deployed around the geometric center, false targets with angle offsets are generated by the cross-eye or centroid flashing method. The position coordinates of the false targets are:

[0042] ;

[0043] ;

[0044] in, are the position coordinates of the false targets deployed around the geometric center, are the jammer coordinates, , , Represents the offset of the jammer relative to the geometric center and satisfies, , r is the preset maximum offset radius, It is the angle between the false target point trace and the radar meridian direction and the meridian direction between the radar and the jammer.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The present invention provides a radar network-oriented dense jamming and deception interference method and system. The method combines networked radars and jammers to construct an electronic countermeasure penetration scenario. The method utilizes the position information of each radar in the radar network and the detection beam width or field of view of the radar. Through pre-reconnaissance of the radar network by a reconnaissance aircraft, the intersection area of ​​the radar beam coverage area is obtained. The jammers are reasonably deployed in the intersection area, and each jammer is planned to ensure that each jammer can maximize its own jamming performance. Then, false target traces are dynamically generated in real time in the intersection area, so that the intersection area is covered with traces, effectively reducing the fusion efficiency and effect of the radar network, and achieving effective interference to the radar network. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 1. A schematic flow chart of a method for dense jamming and deception interference of a radar network according to an embodiment of the present invention;

[0048] Figure 2 A diagram of a dense jamming, deception, and interference scenario of a dense jamming, deception, and interference method for a radar network in one embodiment of the present invention;

[0049] Figure 3 This is a diagram showing the interference effects of distance and angle interference on a radar network in a dense jamming and deception jamming method for a radar network in one embodiment of the present invention;

[0050] Figure 4 This is a diagram showing the interference effect of angle interference on a radar network in a dense jamming and deception interference method for a radar network in an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0052] Example 1: This example introduces a method for dense jamming and deception interference of a radar network, including:

[0053] Obtain the location information of each radar in the radar network, as well as the azimuth beam width of each radar;

[0054] Based on the radar's position information and beam width, determine the intersection area of ​​each radar beam in the radar network, and obtain the vertex coordinates of the intersection area;

[0055] The geometric center coordinates of the intersection area are calculated based on the vertex coordinates. Jammers with only range deception capabilities are deployed in a set area near the geometric center, and jammers with both range and angle deception capabilities are deployed in a set area around the geometric center.

[0056] For jammers deployed near the geometric center, equally spaced false targets are generated along the radial direction between them and each radar. For jammers deployed around the geometric center, false targets with angle offsets are generated by cross-eye or centroid flashing methods.

[0057] By filling the intersection area with the false targets, the radar network fusion center will fail to function properly when performing point trace correlation inspection because the number of paired combinations exceeds the system processing capacity.

[0058] like Figure 1 As shown, the application process of the dense jamming and deception jamming method for radar networks provided in this embodiment specifically involves the following steps:

[0059] Get the location information of each radar in the radar network, including two-dimensional position coordinates , .

[0060] Get the detection beam width or field of view of each radar, the azimuth beam width of the radar , the overall field of view of the radar network.

[0061] According to the intersection area of ​​the target detection scan by the radar network, multiple jammers generate dense false targets. The information of the false targets can be expressed as:

[0062] ;

[0063] in, Represents the coordinate set matrix of the false target, Indicates the number of false targets, Indicates the number of radars, Indicates that the jammer is The radar generates A false target Directional relationship.

[0064] The formation of electronic jamming clouds can cause a "combination explosion" to the fusion center of the radar network, including:

[0065] Determine the intersection area of ​​the radar network scanning beam, and obtain the intersection area of ​​the radar beam coverage area based on the relevant information obtained by the reconnaissance aircraft on the radar network , The vertex coordinates are , .

[0066] Reasonably deploy jammers in the intersection area, plan the flight path of each jammer, ensure that each jammer can maximize its jamming performance, and deploy jammers that only have distance deception performance as far as possible in the middle area of ​​the radar network intersection area, similar to the geometric center. The expression is as follows:

[0067] ;

[0068] in, are the geometric center coordinates, The coordinates of the polygon boundary vertices of the intersection area.

[0069] Deploy jammers with range and angle deception capabilities as close as possible to jammers with range deception capabilities.

[0070] According to the deployed jammers, false targets are generated accordingly. For jammers with only distance deception performance, equally spaced false target traces are generated in the radial direction of each radar. For jammers with distance and angle deception performance, corresponding false target traces containing angle deception are generated dynamically in real time in the intersection area through methods such as cross-eye and centroid flashing. The details are as follows:

[0071] For a jammer that only has the capability of distance deception, a false target point trace is generated in the radial direction between the radar and the jammer. The position coordinates of the false target generated by the radar are:

[0072] ;

[0073] ;

[0074] in, is the position coordinate of the false target deployed at the geometric center, are the jammer coordinates, , , Indicates the distance between each false target, For the The angle information between the radar and the jammer, , For the The farthest distance between a radar and each vertex in the intersection area, , For the The shortest distance between each radar and each vertex in the intersection area, The expression is In order to fill the intersection area with traces as much as possible, it is necessary to make the last trace of the false target trace generated in the longitudinal direction of the radar and the jammer exceed the boundary as much as possible, such as Figure 2 As shown, we calculate the distance between the vertices of all intersection areas and the radar. If the false target trace generated at the rear exceeds the maximum distance, then the last trace of the false target trace generated in the longitudinal direction of the radar and the jammer exceeds the boundary. If the false target trace generated in the front is lower than the minimum distance, then the last trace of the false target trace generated in the longitudinal direction of the radar and the jammer also exceeds the front boundary.

[0075] For jammers with distance and angle deception capabilities, the corresponding false target traces with angle offsets are generated dynamically in real time in the intersection area through methods such as cross-eyes and centroid flashing. The position coordinates of the false target generated by the radar are:

[0076] ;

[0077] ;

[0078] in, are the position coordinates of the false targets deployed around the geometric center, are the jammer coordinates, , , Represents the offset of the jammer relative to the geometric center and satisfies, , r is the preset maximum offset radius, The angle at which the false target trace and the radar longitudinal direction deviate from the radar and jammer longitudinal direction. In order to fill the intersection area with traces as much as possible, it is necessary to make the last trace of the false target trace generated in the radar and jammer longitudinal direction exceed the boundary as much as possible, such as Figure 2 As shown, we calculate the distance between the vertices of all intersection areas and the radar. If the false target trace generated at the rear exceeds the maximum distance, then the last trace of the false target trace generated in the longitudinal direction of the radar and the jammer exceeds the boundary. If the false target trace generated in the front is lower than the minimum distance, then the last trace of the false target trace generated in the longitudinal direction of the radar and the jammer also exceeds the front boundary.

[0079] The final intersection area will be filled with dots, which will cause a "combinatorial explosion" effect on the fusion center of the radar network, as follows:

[0080] Before performing fusion processing, the radar network fusion center needs to perform a point track correlation test to determine whether the observation information in the radar network comes from the same real target. The target correlation test requires pairing different observation information (point tracks) from different radar stations and performing correlation tests separately. Therefore, if the intersection area is filled with point tracks, it can effectively reduce the fusion efficiency and effect of the radar network, and even cause the fusion system to crash, resulting in a "combination explosion" effect in the fusion center.

[0081] The following describes the contents involved in the above embodiment in conjunction with a preferred embodiment.

[0082] This embodiment is analyzed in combination with the actual specific operation process.

[0083] like Figure 2 As shown in this example, two jammers shield real targets from penetrating the networked active and passive radars, generating false targets between 120km and 20km from the radars. The networked radar fusion center uses the nearest neighbor correlation algorithm with a correlation threshold of 4000m. When the distance between the generated active false target pairs is less than the correlation threshold, the false target points pass the correlation test and are fused, achieving the purpose of deceiving the networked active and passive radars. When the distance between the generated active false target pairs is greater than the correlation threshold, the false targets are eliminated by the fusion center. The simulation parameters of the radar station and jammers are shown in Tables 1 and 2.

[0084] Table 1 Radar parameters

[0085]

[0086] Table 2 Jammer Parameters

[0087]

[0088] Calculating the data in Tables 1 and 2 shows that the two radars are 10 km apart and the distance between the two jammers is 7.6 km. The two jammers fly at a constant speed, and the initial distance between the jammers and the radars is 60 km, where they produce false target traces.

[0089] Under the above simulation parameters, the two jammers implement single-range deception and angle-range composite deception on the two active and passive composite radar networks.

[0090] Implementing the angle-distance composite jamming method, the false target traces of each radar station before and after data fusion are as follows: Figure 3 As shown in the figure, the single-range deception scheme is implemented, and the false target traces of each radar station before and after data fusion are as follows: Figure 4 The networked radar performs point-to-point correlation on the false target traces using the nearest neighbor correlation method, and then fuses the successfully correlated traces.

[0091] from Figure 3 and Figure 4 It can be seen that the two jammers respectively perform single distance deception and angle distance compound deception on the two radars, both of which produce a large number of false targets. After point trace correlation and fusion, the comparison shows that Figure 3 and Figure 4 The false targets generated by the angle-distance composite deception jamming scheme can pass the "homologous consistency test" of the networked radar more often than the false targets generated by the single-distance deception scheme, making it easier to achieve the purpose of collaborative deception of the networked radar.

[0092] Embodiment 2: This embodiment provides a dense jamming and deception jamming device for a radar network, including:

[0093] The information acquisition module is used to obtain the position information of each radar in the radar network and the azimuth beam width of each radar;

[0094] A beam intersection area confirmation module is used to determine the intersection area of ​​each radar beam in the radar network based on the radar's position information and beam width, and obtain the vertex coordinates of the intersection area;

[0095] The jammer deployment module is used to calculate the coordinates of the geometric center of the intersection area based on the vertex coordinates of the intersection area, deploy jammers with only distance deception capabilities in a set area near the geometric center, and deploy jammers with distance and angle deception capabilities in a set area around the geometric center;

[0096] The false target generation module is used to generate equally spaced false targets along the radial direction between the jammer deployed near the geometric center and each radar, and to generate false targets with angle offsets by using the cross-eye or centroid flashing method for jammers deployed around the geometric center.

[0097] The deception jamming module fills the intersection area with the false targets, so that the radar network fusion center fails to function properly when performing point trace correlation inspection because the number of paired combinations exceeds the system processing capacity.

[0098] In the jammer deployment module, the geometric center coordinates of the intersection area are calculated based on the vertex coordinates of the intersection area. The formula is as follows:

[0099] ;

[0100] in, are the geometric center coordinates, are the vertex coordinates of the intersection area, .

[0101] In the false target generation module, for the jammer deployed near the geometric center, false targets with equal spacing are generated along the radial direction between the jammer and each radar. The position coordinates of the false targets are:

[0102] ;

[0103] ;

[0104] in, is the position coordinate of the false target deployed at the geometric center, are the jammer coordinates, , , Indicates the distance between each false target, For the The angle information between the radar and the jammer, , For the The farthest distance between a radar and each vertex in the intersection area, , For the The shortest distance between each radar and each vertex in the intersection area, The expression is .

[0105] In the false target generation module, for the jammers deployed around the geometric center, false targets with angle offset are generated by the cross-eye or centroid flashing method. The position coordinates of the false targets are:

[0106] ;

[0107] ;

[0108] in, are the position coordinates of the false targets deployed around the geometric center, are the jammer coordinates, , , Represents the offset of the jammer relative to the geometric center and satisfies, , r is the preset maximum offset radius, It is the angle between the false target point trace and the radar meridian direction and the meridian direction between the radar and the jammer.

[0109] The specific functional implementation of each of the above modules can be found in the relevant content of the method in Example 1 and will not be elaborated on here.

[0110] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for dense jamming and deception interference of radar networks, characterized in that: include: Obtain the location information of each radar in the radar network, as well as the azimuth beam width of each radar; Based on the radar's position information and beam width, determine the intersection area of ​​each radar beam in the radar network, and obtain the vertex coordinates of the intersection area; The geometric center coordinates of the intersection area are calculated based on the vertex coordinates. Jammers with only range deception capabilities are deployed in a set area near the geometric center, and jammers with both range and angle deception capabilities are deployed in a set area around the geometric center. For jammers deployed near the geometric center, equally spaced false targets are generated along the radial direction between them and each radar. For jammers deployed around the geometric center, false targets with angle offsets are generated by cross-eye or centroid flashing methods. By filling the intersection area with the false targets, the radar network fusion center will fail to function properly when performing point trace correlation inspection because the number of paired combinations exceeds the system processing capacity.

2. The radar network-oriented dense jamming and deception jamming method according to claim 1 is characterized in that: The position information of the radar includes two-dimensional position coordinates.

3. The radar network-oriented dense jamming and deception jamming method according to claim 2, characterized in that: The determining of the intersection area of ​​each radar beam in the radar network based on the radar position information and beam width, and obtaining the vertex coordinates of the intersection area, includes: Obtain the beam parameters of each radar in the radar network through reconnaissance aircraft, including the radar's location information, azimuth beam width and beam pointing; Based on the beam parameters, the polygonal boundaries of each radar beam coverage are calculated to determine the intersection area. , and extract The vertex coordinates are , .

4. The radar network-oriented dense jamming and deception jamming method according to claim 3 is characterized in that: The geometric center coordinates of the intersection area are calculated based on the vertex coordinates of the intersection area. The formula is as follows: ； in, are the geometric center coordinates.

5. The radar network-oriented dense jamming and deception jamming method according to claim 1, characterized in that: The jammer deployed near the geometric center generates equally spaced false targets along the radial direction between the jammer and each radar. The position coordinates of the false targets are: ； ； in, is the position coordinate of the false target deployed at the geometric center, are the jammer coordinates, , , Indicates the distance between each false target, For the The angle information between the radar and the jammer, , For the The farthest distance between a radar and each vertex in the intersection area, , For the The shortest distance between each radar and each vertex in the intersection area, The expression is .

6. The radar network-oriented dense jamming and deception jamming method according to claim 5, characterized in that: The jammers deployed around the geometric center generate false targets with angle offsets through the cross-eye or centroid flashing method. The position coordinates of the false targets are: ； ； in, are the position coordinates of the false targets deployed around the geometric center, are the jammer coordinates, , , Represents the offset of the jammer relative to the geometric center and satisfies, , r is the preset maximum offset radius, It is the angle between the false target point trace and the radar meridian direction and the meridian direction between the radar and the jammer.

7. A dense jamming and deception jamming system for radar networks, characterized in that: include: The information acquisition module is used to obtain the position information of each radar in the radar network and the azimuth beam width of each radar; A beam intersection area confirmation module is used to determine the intersection area of ​​each radar beam in the radar network based on the radar's position information and beam width, and obtain the vertex coordinates of the intersection area; The jammer deployment module is used to calculate the coordinates of the geometric center of the intersection area based on the vertex coordinates of the intersection area, deploy jammers with only distance deception capabilities in a set area near the geometric center, and deploy jammers with distance and angle deception capabilities in a set area around the geometric center; The false target generation module is used to generate equally spaced false targets along the radial direction between the jammer deployed near the geometric center and each radar, and to generate false targets with angle offsets by using the cross-eye or centroid flashing method for jammers deployed around the geometric center. The deception jamming module fills the intersection area with the false targets, so that the radar network fusion center fails to function properly when performing point trace correlation inspection because the number of paired combinations exceeds the system processing capacity.

8. The radar network-oriented dense jamming and deception jamming system according to claim 7 is characterized in that: In the jammer deployment module, the geometric center coordinates of the intersection area are calculated based on the vertex coordinates of the intersection area. The formula is as follows: ； in, are the geometric center coordinates, are the vertex coordinates of the intersection area, .

9. The radar network-oriented dense jamming and deception jamming system according to claim 7, characterized in that: In the false target generation module, for the jammer deployed near the geometric center, false targets with equal spacing are generated along the radial direction between the jammer and each radar. The position coordinates of the false targets are: ； ； in, is the position coordinate of the false target deployed at the geometric center, are the jammer coordinates, , , Indicates the distance between each false target, For the The angle information between the radar and the jammer, , For the The farthest distance between a radar and each vertex in the intersection area, , For the The shortest distance between each radar and each vertex in the intersection area, The expression is .

10. The radar network-oriented dense jamming and deception jamming system according to claim 9, characterized in that: In the false target generation module, for the jammers deployed around the geometric center, false targets with angle offset are generated by the cross-eye or centroid flashing method. The position coordinates of the false targets are: ； ； in, are the position coordinates of the false targets deployed around the geometric center, are the jammer coordinates, , , Represents the offset of the jammer relative to the geometric center and satisfies, , r is the preset maximum offset radius, It is the angle between the false target point trace and the radar meridian direction and the meridian direction between the radar and the jammer.

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