Radar networking anti-stealth detection performance acquisition method and device, equipment and medium

Abstract

The invention discloses a radar networking anti-stealth detection performance obtaining method, device and equipment and a medium, and relates to the technical field of radar detection, the method and device are applied to a preset radar networking, the preset radar networking comprises a plurality of basic radar detection units, and the method comprises the following steps: receiving echo signals generated by the plurality of basic radar detection units, obtaining an available observation information group by using the echo signal; performing coordinate estimation of a stealth target on the available observation information group to obtain a target position of the stealth target; obtaining the positioning precision of the target position by using the target position and a preset positioning precision formula; and obtaining the detection power of the preset radar network based on the detection area of each basic radar detection unit. According to the scheme, the anti-stealth detection performance of the radar networking can be determined by acquiring the positioning precision and the detection power.

Description

Technical Field

[0001] The present invention relates to the technical field of radar detection, and particularly relates to a method, device, equipment and medium for obtaining the anti-stealth detection performance of a radar network. Background Art

[0002] At present, the most important stealth measure for airborne stealth targets is the shape design, which deflects and scatters the incident radar waves in other directions, ensuring that there is a very small RCS (Radar Cross section) within ±30° of the nose cone direction of the aircraft. When a bistatic radar detects a stealth target, when the bistatic angle is greater than 30°, lateral scattering will occur, causing the RCS of the stealth target to increase significantly; when it is greater than 180°, forward scattering will occur, and the target RCS will increase sharply; at the same time, a Doppler beat frequency phenomenon will appear on the bistatic baseline. These make the bistatic radar have better ability to detect stealth targets in the air. However, this technology requires an additional communication link to be installed between the bistatic radars, and the bistatic radar faces problems such as pulse chasing and low search efficiency when detecting targets. When a distributed communication radar basic unit based on two transmitters and one receiver (2T1R) detects and locates a target, no additional communication link needs to be installed, and problems such as pulse chasing and low search efficiency can be overcome. However, this method is limited by its own detection ability and is affected to a certain extent by the baseline length, time accuracy, and beam width. At the same time, the detection area is determined by the layout of the transmitting station and the receiving station, and the detection power is not great. Therefore, the detection power and positioning accuracy can be expanded by arranging multiple radar base stations.

[0003] In summary, how to determine the anti-stealth detection performance of a radar network is a problem to be solved in this field. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a method, device, equipment and medium for obtaining the anti-stealth detection performance of a radar network, which can determine the anti-stealth detection performance of the radar network. The specific scheme is as follows:

[0005] In the first aspect, the present application discloses a method for obtaining the anti-stealth detection performance of a radar network, which is applied to a preset radar network. The preset radar network includes multiple basic radar detection units, and includes:

[0006] Receiving the echo signals generated by the multiple basic radar detection units, and obtaining an available observation information group by using the echo signals;

[0007] Estimating the coordinates of the stealth target for the available observation information group to obtain the target position of the stealth target;

[0008] Obtaining the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula;

[0009] The detection power of the preset radar network is obtained based on the detection areas of the respective basic radar detection units.

[0010] Optionally, receiving the echo signals generated by the multiple basic radar detection units and obtaining an available observation information group by using the echo signals includes:

[0011] Receiving the current echo signal generated by the current basic radar detection unit, and extracting the first signal emission time emitted by the first transmitting station and the second signal emission time emitted by the second transmitting station in the current echo signal of the current basic radar detection unit;

[0012] Determining the signal reception time and reception azimuth angle of the receiving station in the current basic radar detection unit;

[0013] Determining a first distance sum and a second distance sum by using the signal reception time, the first signal emission time, and the second signal emission time;

[0014] Obtaining the available observation information group of the current basic radar detection unit by using the first distance sum, the second distance sum, and the reception azimuth angle.

[0015] Optionally, performing coordinate estimation of a stealth target on the available observation information group to obtain the target position of the stealth target includes:

[0016] Obtaining the site information of the current basic radar detection unit; wherein the site information includes a first site emitted by the first transmitting station, a second site emitted by the second transmitting station, and a third site of the receiving station in the current basic radar detection unit;

[0017] Performing coordinate estimation of the stealth target on the available observation information group and the site information of the current basic radar detection unit to obtain the target position of the stealth target detected by the current basic radar detection unit.

[0018] Optionally, performing coordinate estimation of a stealth target on the available observation information group to obtain the target position of the stealth target includes:

[0019] Constructing a target positioning equation;

[0020] Performing coordinate estimation of the stealth target on the available observation information group and the site information of the current basic radar detection unit by using the target positioning equation.

[0021] Optionally, before obtaining the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula, further includes:

[0022] Establish a likelihood function, and use the elimination method and the likelihood function to obtain the Fisher information matrix;

[0023] Use the Fisher information matrix to obtain a preset positioning accuracy formula.

[0024] Optionally, obtaining the detection power of the preset radar network based on the detection areas of the respective basic radar detection units includes:

[0025] Determine the detection areas of the respective basic radar detection units;

[0026] Calculate the sum of the respective detection areas, so as to obtain the detection power of the preset radar network based on the sum of the respective detection areas.

[0027] Optionally, determining the detection areas of the respective basic radar detection units includes:

[0028] Obtain the detection power auxiliary information of the current basic radar detection unit, so as to determine the detection area of the current basic radar detection unit based on the detection power auxiliary information; wherein, the detection power auxiliary information includes the peak power of the transmitting station, the signal wavelength, the transmitting station antenna gain, the transmitting station loss, the receiving filter noise bandwidth, and the minimum detectable signal-to-noise ratio.

[0029] In a second aspect, the present application discloses a device for obtaining the anti-stealth detection performance of a radar network, which is applied to a preset radar network and includes:

[0030] An observation information acquisition module, configured to receive echo signals generated by a plurality of the basic radar detection units, and use the echo signals to obtain an available observation information group;

[0031] A coordinate estimation module, configured to perform coordinate estimation of a stealth target on the available observation information group to obtain the target position of the stealth target;

[0032] A positioning accuracy acquisition module, configured to use the target position and a preset positioning accuracy formula to obtain the positioning accuracy of the target position;

[0033] A detection power acquisition module, configured to obtain the detection power of the preset radar network based on the detection areas of the respective basic radar detection units.

[0034] In a third aspect, the present application discloses an electronic device, including:

[0035] A memory, configured to store a computer program;

[0036] A processor, configured to execute the computer program to implement the steps of the method for obtaining the anti-stealth detection performance of a radar network disclosed above.

[0037] In a fourth aspect, the present application discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the steps of the radar networking anti-stealth detection performance acquisition method disclosed above are implemented.

[0038] The beneficial effects of the present application are as follows: The present application is applied to a preset radar network, and the preset radar network includes a plurality of basic radar detection units. The method includes: receiving echo signals generated by the plurality of basic radar detection units, and obtaining an available observation information group by using the echo signals; estimating the coordinates of a stealth target for the available observation information group to obtain the target position of the stealth target; obtaining the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula; and obtaining the detection power of the preset radar network based on the detection areas of the respective basic radar detection units. Thus, by obtaining the available observation information groups and detection areas of the plurality of basic radar detection units to obtain the corresponding positioning accuracy and detection power, the radar networking anti-stealth detection performance can be determined. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings according to the provided drawings without creative efforts.

[0040] Figure 1 It is a flowchart of a method for acquiring radar networking anti-stealth detection performance disclosed in the present application;

[0041] Figure 2 It is a schematic diagram of a specific basic radar detection unit disclosed in the present application;

[0042] Figure 3 It is a flowchart of a specific method for acquiring radar networking anti-stealth detection performance disclosed in the present application;

[0043] Figure 4 It is a flowchart of another specific method for acquiring radar networking anti-stealth detection performance disclosed in the present application;

[0044] FIG. 5(a) is a schematic diagram of the positioning accuracy of the first specific 2T2R disclosed in the present application at different station spacing of receiving stations;

[0045] FIG. 5(b) is a schematic diagram of the positioning accuracy of the second specific 2T2R disclosed in the present application at different station spacing of receiving stations;

[0046] Figure 5 (c) is a schematic diagram of the positioning accuracy of the third specific 2T2R disclosed in this application at different station spacing of receiving stations;

[0047] Figure 5 (d) is a schematic diagram of the positioning accuracy of the fourth specific 2T2R disclosed in this application at different station spacing of receiving stations;

[0048] Figure 6 (a) is a schematic diagram of the coverage multiplicity of the first specific 2T2R disclosed in this application at different station spacing of receiving stations;

[0049] Figure 6 (b) is a schematic diagram of the coverage multiplicity of the second specific 2T2R disclosed in this application at different station spacing of receiving stations;

[0050] Figure 6 (c) is a schematic diagram of the coverage multiplicity of the third specific 2T2R disclosed in this application at different station spacing of receiving stations;

[0051] Figure 6 (d) is a schematic diagram of the coverage multiplicity of the fourth specific 2T2R disclosed in this application at different station spacing of receiving stations;

[0052] Figure 7 (a) is a schematic diagram of the simulated GDOP of a specific 2T3R disclosed in this application;

[0053] Figure 7 (b) is a simulated detection coverage map of a specific 2T3R disclosed in this application;

[0054] Figure 7 (c) is a schematic diagram of the simulated GDOP of a specific 3T3R disclosed in this application;

[0055] Figure 7 (d) is a simulated detection coverage map of a specific 3T3R disclosed in this application;

[0056] Figure 7 (e) is a schematic diagram of the simulated GDOP of a specific 4T3R disclosed in this application;

[0057] Figure 7 (f) is a simulated detection coverage map of a specific 4T3R disclosed in this application;

[0058] Figure 7 (g) is a schematic diagram of the simulated GDOP of a specific 4T4R disclosed in this application;

[0059] Figure 7 (h) is a simulated detection coverage map of a specific 4T4R disclosed in this application;

[0060] Figure 8 is a schematic diagram of the structure of a device for obtaining the anti-stealth detection performance of a radar network disclosed in this application;

[0061] Figure 9 is a structural diagram of an electronic device disclosed in this application. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0063] Currently, the most important stealth measure for airborne stealth targets is the shape design, which deflects the incident radar waves and scatters them in other directions, ensuring that there is a very small RCS within ±30° of the nose cone direction of the aircraft. When a bistatic radar detects a stealth target, when the bistatic angle is greater than 30°, lateral scattering will occur, causing the RCS of the stealth target to increase significantly; when it is greater than 180°, forward scattering will occur, and the target RCS will increase sharply; at the same time, a Doppler beat frequency phenomenon will appear on the bistatic baseline. These enable the bistatic radar to have better ability to detect stealth targets in the air. However, this technology requires an additional communication link to be installed between the bistatic radars, and problems such as pulse chasing and low search efficiency are faced during the detection of targets by the bistatic radar. When a distributed communication radar basic unit based on two transmitters and one receiver (2T1R) detects and locates a target, no additional communication link needs to be installed, and problems such as pulse chasing and low search efficiency can be overcome. However, this method is limited by its own detection ability and will be affected by the baseline length, time accuracy, and beam width to a certain extent. At the same time, the detection area is determined by the layout of the transmitting station and the receiving station, and the detection power is not great. Therefore, the detection power and positioning accuracy can be expanded by arranging multiple radar base stations.

[0064] Therefore, the present application correspondingly provides a radar networking anti-stealth detection performance acquisition solution, which can determine the radar networking anti-stealth detection performance.

[0065] See Figure 1 As shown, the embodiments of the present application disclose a method for acquiring radar networking anti-stealth detection performance, which is applied to a preset radar network. The preset radar network includes a plurality of basic radar detection units, including:

[0066] Step S11: Receive the echo signals generated by the plurality of basic radar detection units, and obtain an available observation information group by using the echo signals.

[0067] It can be understood that a single 2T1R basic radar detection unit includes a first transmitting station, a second transmitting station, and a receiving station. Among them, the transmitting station can be a wide-beam transmitting station, and the receiving station can be a narrow-beam receiving station. m wide-beam transmitting stations and n narrow-beam receiving stations are pre-arranged to obtain an mTnR preset radar network. That is to say, the mTnR preset radar network includes a plurality of 2T1R basic radar detection units.

[0068] In this embodiment, receiving the echo signals generated by multiple said basic radar detection units and obtaining an available observation information group by using the echo signals includes: receiving the current echo signal generated by the current basic radar detection unit, and extracting the first signal emission time emitted by the first transmitting station and the second signal emission time emitted by the second transmitting station in the current echo signal of the current basic radar detection unit; determining the signal reception time and reception azimuth angle of the receiving station in the current basic radar detection unit; determining the first distance sum and the second distance sum by using the signal reception time, the first signal emission time, and the second signal emission time; and obtaining the available observation information group of the current basic radar detection unit by using the first distance sum, the second distance sum, and the reception azimuth angle. For example Figure 2 A schematic diagram of a specific basic radar detection unit shown, using a three-dimensional right-handed rectangular coordinate system, where it is assumed that the coordinates of the receiving station R are (x R , y R , z R ), the coordinates of the first transmitting station T1 are (x T1 , y T1 , z T1 ), the coordinates of the second transmitting station T2 are (x T2 , y T2 , z T2 ), and the coordinates of the stealth target P are (x, y, z), and the formed angles are as shown in the figure represents the elevation angle of the position of the first transmitting station T1 in the coordinate system defined by the receiving station R represents the elevation angle of the position of the second transmitting station T2 represents the azimuth angle of the position of the first transmitting station T1 represents the azimuth angle of the position of the second transmitting station T2 represents the azimuth angle of the target position. The first transmitting station and the second transmitting station respectively transmit signals to the stealth target, and the receiving station obtains the signals reflected by the stealth target to generate echo signals. The echo signals include the first signal emission time emitted by the first transmitting station T1, the first station location (x T1 , y T1 , z T1 ), the second signal emission time emitted by the second transmitting station T2, the second station location (x T2 , y T2 , z T2 ). Determine the signal reception time and the reception azimuth angle of the receiving station in the current basic radar detection unit; The formulas for determining the first distance sum and the second distance sum by using the signal reception time, the first signal emission time, and the second signal emission time are as follows

[0069] ;

[0070] ;

[0071] wherein, c represents the speed of light, represents the sum of the distances from the first transmitting station to the stealth target and then from the stealth target to the receiving station, represents the sum of the distances from the second transmitting station to the stealth target and then from the stealth target to the receiving station;

[0072] Using the first distance sum , the second distance sum and the receiving azimuth to obtain the available observation information group of the current basic radar detection unit , , the errors thereof are respectively , , , using n available observation information groups measured by n receiving stations.

[0073] Step S12: Estimate the coordinates of the stealth target for the available observation information group to obtain the target position of the stealth target.

[0074] In this embodiment, the estimating the coordinates of the stealth target for the available observation information group to obtain the target position of the stealth target includes: obtaining the site information of the current basic radar detection unit; wherein, the site information includes the first site transmitted by the first transmitting station, the second site transmitted by the second transmitting station and the third site of the receiving station in the current basic radar detection unit; estimating the coordinates of the stealth target for the available observation information group and the site information of the current basic radar detection unit to obtain the target position of the stealth target detected by the current basic radar detection unit. Determine the third site of the receiving station, and extract the first site transmitted by the first transmitting station and the second site transmitted by the second transmitting station from the echo signal. It can be understood that n available observation information groups measured by n receiving stations are used, and target coordinate estimation is performed according to the n available observation information groups and the site information.

[0075] In this embodiment, the estimating the coordinates of the stealth target for the available observation information group to obtain the target position of the stealth target includes: constructing a target positioning equation; using the target positioning equation to estimate the coordinates of the stealth target for the available observation information group and the site information of the current basic radar detection unit. Among them, the target positioning equation is as follows:

[0076] ;

[0077] Let , the target position , all measurements can be written as a function as follows:

[0078] ;

[0079] wherein, , , respectively represent the error-free true values of the respective observed quantities of the target by the th radar, represents the noise during measurement.

[0080] In the receiving station, there is the following relationship:

[0081] ;

[0082] For a communicationized radar receiving station that can only obtain part of the observations, the positioning equation corresponding to the unobservable information volume can be set to 0; for a single communicationized radar receiving station, its noise covariance is known to be a diagonal matrix. According to the above analysis, its covariance is a diagonal matrix as follows:

[0083] .

[0084] Step S13: Obtain the positioning accuracy of the target position by using the target position and the preset positioning accuracy formula.

[0085] The preset positioning accuracy formula (Geometric Dilution of Precision, i.e., GDOP) is as follows:

[0086] ;

[0087] wherein, FIM represents the Fisher information matrix.

[0088] Step S14: Obtain the detection power of the preset radar network based on the detection areas of the respective basic radar detection units.

[0089] In this embodiment, the detection areas of the respective basic radar detection units are determined; the sum of the respective detection areas is calculated so as to obtain the detection power of the preset radar network based on the sum of the respective detection areas. That is to say, the mTnR communicationized radar network is based on the 2T1R detection basic unit, so its detection area is the sum of the detection areas of all the 2T1R detection units included after the mTnR networking.

[0090] The beneficial effects of this application are as follows: This application is applied to a preset radar network, and the preset radar network includes multiple basic radar detection units. The method includes: receiving echo signals generated by the multiple basic radar detection units, and obtaining an available observation information group by using the echo signals; estimating the coordinates of a stealth target for the available observation information group to obtain the target position of the stealth target; obtaining the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula; and obtaining the detection power of the preset radar network based on the detection areas of the respective basic radar detection units. Thus, by obtaining the available observation information groups and detection areas of the multiple basic radar detection units to obtain the corresponding positioning accuracy and detection power, the anti-stealth detection performance of the radar network can be determined.

[0091] See Figure 3 As shown, an embodiment of this application discloses a specific method for obtaining the anti-stealth detection performance of a radar network, which is applied to a preset radar network. The preset radar network includes multiple basic radar detection units, and includes:

[0092] Step S21: Receive echo signals generated by the multiple basic radar detection units, and obtain an available observation information group by using the echo signals.

[0093] Step S22: Estimate the coordinates of a stealth target for the available observation information group to obtain the target position of the stealth target.

[0094] Step S23: Establish a likelihood function, and obtain a Fisher information matrix by using the elimination method and the likelihood function; obtain a preset positioning accuracy formula by using the Fisher information matrix.

[0095] In this embodiment, the likelihood function is as follows:

[0096] ;

[0097] The maximum likelihood estimate of X is:

[0098] ;

[0099] Let , and obtain;

[0100] ;

[0101] In the formula, is a constant term, specifically:

[0102] ;

[0103] Derive , and obtain:

[0104] ;

[0105] The Fisher information matrix can be obtained as follows:

[0106] ;

[0107] In the above formula, 、 、 denote the derivatives with respect to the target position vector .

[0108] For any point in the region of interest, substituting 、 、 can obtain the Fisher information matrix of this point. The minimum positioning accuracy of this point can be obtained by inverting the Fisher information matrix, which is:

[0109] ;

[0110] According to the definition of GDOP , the relationship between GDOP and the Fisher information matrix can be obtained:

[0111] ;

[0112] That is to say, the preset positioning accuracy formula is: .

[0113] Step S24: Obtain the positioning accuracy of the target position by using the target position and the preset positioning accuracy formula.

[0114] Obtain the derivatives 、 、 、 of the target position 、 、 . It can be understood that the independent variables in the preset positioning accuracy formula are

[0115] Step S25: Obtain the detection power of the preset radar network based on the detection areas of the respective basic radar detection units.

[0116] It can be seen that this application pre-constructs a preset positioning accuracy formula and a target positioning equation. After obtaining the echo signal, the target position of the stealth target is obtained by using the target positioning equation, and then the positioning accuracy of this target position is obtained by using the preset positioning accuracy formula, so that the deployment of each basic radar detection unit in the preset radar network can be adjusted accordingly by using the positioning accuracy.

[0117] See Figure 4 As shown, another specific method for obtaining the anti-stealth detection performance of a radar network is disclosed in an embodiment of the present application, which is applied to a preset radar network. The preset radar network includes a plurality of basic radar detection units, and includes:

[0118] Step S31: Receive the echo signals generated by the plurality of basic radar detection units, and obtain an available observation information group by using the echo signals.

[0119] Step S32: Estimate the coordinates of the stealth target for the available observation information group to obtain the target position of the stealth target.

[0120] Step S33: Obtain the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula.

[0121] Step S34: Determine the detection area of each basic radar detection unit; calculate the sum of the detection areas of each, so as to obtain the detection power of the preset radar network based on the sum of the detection areas of each.

[0122] In this embodiment, the determination of the detection area of each basic radar detection unit includes: obtaining the detection power auxiliary information of the current basic radar detection unit, so as to determine the detection area of the current basic radar detection unit based on the detection power auxiliary information; wherein, the detection power auxiliary information includes the peak power of the transmitting station, the signal wavelength, the transmitting station antenna gain, the transmitting station loss, the receiving filter noise bandwidth, and the minimum detectable signal-to-noise ratio. Let any transmitting station , and receiving station , the detection area of the 2T1R communication radar basic unit formed is

[0123] ;

[0124] In the formula, , represent , the peak power of the transmitting station, represents the signal wavelength, , represent , the transmitting station antenna gain, , represent , the transmitting station loss, represents the receiving system noise temperature, represents the receiving filter noise bandwidth, represents the minimum detectable signal-to-noise ratio, Denote the bistatic target RCS Denote the detection coverage multiplicity (i.e., the number of times the same target is covered by multiple detection units simultaneously) Denote the receiving station Loss

[0125] Then there is an mTnR communication radar network, and its detection area is:

[0126] .

[0127] It can be seen from this that the present application separately obtains the detection areas of each basic radar detection unit, sums up the detection areas of each, that is, obtains the total sum of the detection areas, and further obtains the detection power of the mTnR communication radar network, so as to subsequently make corresponding adjustments to the deployment of each basic radar detection unit in the preset radar network according to the detection power.

[0128] The following uses simulation experiment data to make corresponding explanations for the present application. Based on the radar network anti-stealth detection performance acquisition method of the present application, the target positioning accuracy, station layout, detection power, etc. of the 2TnR network in the communication radar anti-stealth system are calculated. The first specific 2T2R in different receiving station layout intervals as shown in Fig. 5(a) has a positioning accuracy diagram with a distance of 10 Km between its receiving stations. The second specific 2T2R in different receiving station layout intervals as shown in Fig. 5(b) has a positioning accuracy diagram with a distance of 40 Km between its receiving stations. The third specific 2T2R in different receiving station layout intervals as shown in Fig. 5(c) has a positioning accuracy diagram with a distance of 60 Km between its receiving stations. The fourth specific 2T2R in different receiving station layout intervals as shown in Fig. 5(d) has a positioning accuracy diagram with a distance of 140 Km between its receiving stations;

[0129] The first specific 2T2R in different receiving station layout intervals as shown in Fig. 6(a) has a coverage multiplicity diagram with a distance of 10 Km between its receiving stations. The second specific 2T2R in different receiving station layout intervals as shown in Fig. 6(b) has a coverage multiplicity diagram with a distance of 40 Km between its receiving stations. The third specific 2T2R in different receiving station layout intervals as shown in Fig. 6(c) has a coverage multiplicity diagram with a distance of 60 Km between its receiving stations. The fourth specific 2T2R in different receiving station layout intervals as shown in Fig. 6(d) has a coverage multiplicity diagram with a distance of 140 Km between its receiving stations;

[0130] Finally, the problems of target positioning accuracy, station layout, detection power, etc. of the mTnR network are calculated. As shown in Fig. 7(a), a specific simulation GDOP diagram of 2T3R, a specific simulation detection coverage map of 2T3R shown in Fig. 7(b), a specific simulation GDOP diagram of 3T3R shown in Fig. 7(c), a specific simulation detection coverage map of 3T3R shown in Fig. 7(d), a specific simulation GDOP diagram of 4T3R shown in Fig. 7(e), a specific simulation detection coverage map of 4T3R shown in Fig. 7(f), a specific simulation GDOP diagram of 4T4R shown in Fig. 7(g), and a specific simulation detection coverage map of 4T4R shown in Fig. 7(h);

[0131] Through calculation, the following conclusions are obtained:

[0132] 1) The fusion positioning accuracy of the wide-beam 2TnR system is significantly better than that of the wide-beam 2T1R basic detection unit;

[0133] 2) In the mTnR system with 2T1R as the basic detection unit, the system detection coverage area, that is, the system detection power, is mainly determined by the layout of the receiving stations, while the multiple coverage situation inside the detection area, that is, the area of the region, is mainly determined by the layout of the transmitting stations;

[0134] 3) The positioning accuracy performance of the system is jointly determined by the layout of the transmitting stations and the receiving stations. The increase of both the receiving stations and the transmitting stations can effectively improve the overall positioning accuracy of the system. However, the increase of the transmitting stations is more significant than that of the receiving stations in improving the positioning accuracy performance of the system. It should be noted that when the number of transmitting stations is greater than 4, the coverage multiplicity of the detection power area around the receiving stations can reach more than 3 times. According to the simulation experiment of the positioning accuracy performance of the triple coverage area, the high-precision positioning requirements can basically be met in this area.

[0135] 4) When the 2TnR structure is adopted for the detection system, adding receiving stations in the key focus area can effectively improve the local positioning accuracy of the system in this area. When arranging the stations of the whole system, the receiving stations can be considered to be dispersed to increase the detection coverage area of the system, that is, the detection power, so as to detect targets earlier; receiving stations are added in the key focus area to improve the local positioning accuracy and enhance the target positioning performance of the system.

[0136] See Figure 8 As shown, the embodiment of the present application discloses a device for obtaining the anti-stealth detection performance of a radar network, which is applied to a preset radar network and includes:

[0137] An observation information acquisition module 11, configured to receive echo signals generated by a plurality of the basic radar detection units, and acquire an available observation information group by using the echo signals;

[0138] A coordinate estimation module 12 for estimating the coordinates of a stealth target from the available observation information group to obtain the target position of the stealth target;

[0139] A positioning accuracy acquisition module 13 for obtaining the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula;

[0140] A detection power acquisition module 14 for obtaining the detection power of the preset radar network based on the detection areas of the respective basic radar detection units.

[0141] The beneficial effects of this application are as follows: This application is applied to a preset radar network, which includes a plurality of basic radar detection units. The method includes: receiving echo signals generated by the plurality of basic radar detection units and obtaining an available observation information group by using the echo signals; estimating the coordinates of a stealth target from the available observation information group to obtain the target position of the stealth target; obtaining the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula; and obtaining the detection power of the preset radar network based on the detection areas of the respective basic radar detection units. Thus, by obtaining the available observation information group and its detection area of the plurality of basic radar detection units to obtain the corresponding positioning accuracy and detection power, the anti-stealth detection performance of the radar network can be determined.

[0142] Furthermore, an embodiment of this application also provides an electronic device. Figure 9 It is a structural diagram of an electronic device 20 shown according to an exemplary embodiment. The content in the figure should not be considered as any limitation on the scope of use of this application.

[0143] Figure 9 It is a schematic structural diagram of an electronic device provided by an embodiment of this application. Specifically, it may include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. Among them, the memory 22 is used to store a computer program, and the computer program is loaded and executed by the processor 21 to implement the relevant steps in the radar network anti-stealth detection performance acquisition method executed by the electronic device disclosed in any of the foregoing embodiments.

[0144] In this embodiment, the power supply 23 is used to provide operating voltages for the various hardware devices on the electronic device; the communication interface 24 can create a data transmission channel between the electronic device and external devices, and the communication protocol it follows is any communication protocol applicable to the technical solution of this application, and no specific limitation is imposed on it here; the input / output interface 25 is used to obtain external input data or output data to the outside, and its specific interface type can be selected according to specific application needs, and no specific limitation is made here.

[0145] Among them, the processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor 21 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the wake state, also known as the CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 21 may be integrated with a GPU (Graphics Processing Unit), and the GPU is responsible for the rendering and drawing of the content to be displayed on the display screen. In some embodiments, the processor 21 may further include an AI (Artificial Intelligence) processor, and the AI processor is used to process computational operations related to machine learning.

[0146] In addition, as a carrier for resource storage, the memory 22 may be a read-only memory, a random access memory, a magnetic disk, or an optical disc, etc. The resources stored thereon include an operating system 221, a computer program 222, data 223, etc., and the storage method may be temporary storage or permanent storage.

[0147] Among them, the operating system 221 is used to manage and control each hardware device and the computer program 222 on the electronic device, so as to realize the operation and processing of the massive data 223 in the memory 22 by the processor 21. It may be Windows, Unix, Linux, etc. In addition to the computer program that can be used to complete the radar networking anti-stealth detection performance acquisition method executed by the electronic device disclosed in any of the foregoing embodiments, the computer program 222 may further include a computer program that can be used to complete other specific tasks. The data 223 may include not only the data transmitted by external devices received by the electronic device, but also the data collected by its own input / output interface 25, etc.

[0148] Furthermore, an embodiment of the present application also discloses a computer-readable storage medium. When the computer program stored in the storage medium is loaded and executed by a processor, the method steps executed in the radar networking anti-stealth detection performance acquisition process disclosed in any of the foregoing embodiments are realized.

[0149] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0150] The above has introduced in detail a method, device, equipment and medium for obtaining the anti-stealth detection performance of a radar network. Specific examples are used in this text to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A method for obtaining the anti-stealth detection performance of a radar network, characterized in that, Applied to a preset radar network, the preset radar network includes a plurality of basic radar detection units, including: Receiving echo signals generated by the plurality of basic radar detection units, and obtaining an available observation information group by using the echo signals; Performing coordinate estimation of a stealth target on the available observation information group to obtain the target position of the stealth target; Obtaining the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula; Obtaining the detection power of the preset radar network based on the detection areas of the respective basic radar detection units.

2. The method for obtaining the anti-stealth detection performance of a radar network according to claim 1, characterized in that, The receiving echo signals generated by the plurality of basic radar detection units, and obtaining an available observation information group by using the echo signals, includes: Receiving a current echo signal generated by the current basic radar detection unit, and extracting a first signal transmission time transmitted by a first transmitting station and a second signal transmission time transmitted by a second transmitting station in the current echo signal of the current basic radar detection unit; Determining a signal reception time and a reception azimuth angle of a receiving station in the current basic radar detection unit; Determining a first distance sum and a second distance sum by using the signal reception time, the first signal transmission time, and the second signal transmission time; Obtaining an available observation information group of the current basic radar detection unit by using the first distance sum, the second distance sum, and the reception azimuth angle.

3. The method for obtaining the anti-stealth detection performance of a radar network according to claim 2, characterized in that, The performing coordinate estimation of a stealth target on the available observation information group to obtain the target position of the stealth target, includes: Obtaining the site information of the current basic radar detection unit; wherein the site information includes a first site transmitted by the first transmitting station, a second site transmitted by the second transmitting station, and a third site of the receiving station in the current basic radar detection unit; Performing coordinate estimation of a stealth target on the available observation information group and the site information of the current basic radar detection unit to obtain the target position of the stealth target detected by the current basic radar detection unit.

4. The method for obtaining the anti-stealth detection performance of a radar network according to claim 3, characterized in that, The performing coordinate estimation of a stealth target on the available observation information group to obtain the target position of the stealth target, includes: Constructing a target positioning equation; Performing coordinate estimation of a stealth target on the available observation information group and the site information of the current basic radar detection unit by using the target positioning equation.

5. The method for obtaining the anti-stealth detection performance of a radar network according to claim 1, characterized in that Before the obtaining the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula, further includes: Establishing a likelihood function, and obtaining a Fisher information matrix by using an elimination method and the likelihood function; Obtaining a preset positioning accuracy formula by using the Fisher information matrix.

6. The method for obtaining the anti-stealth detection performance of a radar network according to any one of claims 1 to 5, characterized in that, The obtaining the detection power of the preset radar network based on the detection areas of the respective basic radar detection units, includes: Determining the detection areas of the respective basic radar detection units; Calculating the sum of the respective detection areas, so as to obtain the detection power of the preset radar network based on the sum of the respective detection areas.

7. The method for obtaining the anti-stealth detection performance of a radar network according to claim 6, wherein The determining the detection areas of the respective basic radar detection units, includes: Obtain the detection power assistance information of the current basic radar detection unit, so as to determine the detection area of the current basic radar detection unit based on the detection power assistance information; wherein, the detection power assistance information includes the peak power of the transmitting station, the signal wavelength, the antenna gain of the transmitting station, the loss of the transmitting station, the noise bandwidth of the receiving filter, and the minimum detectable signal-to-noise ratio.

8. A device for obtaining the anti-stealth detection performance of a radar network, characterized in that Applied to a preset radar network, including: An observation information acquisition module, configured to receive echo signals generated by multiple basic radar detection units, and obtain an available observation information group by using the echo signals; A coordinate estimation module, configured to perform coordinate estimation of stealth targets on the available observation information group to obtain the target positions of the stealth targets; A positioning accuracy acquisition module, configured to obtain the positioning accuracy of the target position by using the target position and a preset positioning accuracy formula; A detection power acquisition module, configured to obtain the detection power of the preset radar network based on the detection areas of the basic radar detection units.

9. An electronic device, characterized in that, Including: A memory, configured to store a computer program; A processor, configured to execute the computer program to implement the steps of the radar network anti-stealth detection performance acquisition method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, For storing a computer program; wherein, when the computer program is executed by a processor, the steps of the radar network anti-stealth detection performance acquisition method according to any one of claims 1 to 7 are implemented.

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