Method, device and equipment for simulating radar main lobe feed-in and storage medium

Abstract

The invention discloses a method, device and equipment for simulating radar main lobe feed-in and a storage medium, relates to the technical field of radar simulation, and is applied to a radar simulation system which comprises a radar antenna, a simulation equipment antenna and simulation equipment. The method comprises the following steps: acquiring a main lobe parameter of a radar antenna and a coverage angle parameter of a simulation equipment antenna; if the main lobe parameter is matched with the coverage angle parameter, determining an angle error value; based on the angle error value, main lobe beam parameters corresponding to the main lobe beam are determined, and the main lobe beam parameters comprise a main lobe gain, an S curve amplitude value and an angle interval; based on the main lobe beam parameters, determining an effective side lobe set emitted by the radar antenna; based on the effective side lobe set, determining a target triple of the main lobe beam mapped on the analog equipment antenna; and based on the target triad, generating a target echo fed back to the radar antenna by the simulation equipment antenna. According to the invention, the accuracy and reliability of radar main lobe simulation can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radar simulation, in particular to a method and device for simulating radar main lobe feeding, equipment and storage medium. BACKGROUND

[0002] At present, with the rapid development of simulation technology, simulation devices are more and more widely used in the research and development testing of radar, electronic warfare and other equipment and the operation of personnel training.

[0003] In related technologies, traditional simulation methods are mainly divided into two categories: airborne platform assisted simulation and electrically scanned radar sidelobe simulation. However, the method relying on airborne platform has high cost and poor adaptability, and is difficult to meet the complex training requirements. The sidelobe simulation method cannot accurately control the angle, resulting in uncontrollable simulation target position and affecting the training effect.

[0004] Therefore, there is an urgent need for a ground-mounted, low-cost and high-precision simulation method that can accurately simulate the angle change of the main lobe target under the sidelobe feeding mode, thereby improving the accuracy and reliability of radar main lobe simulation, and further improving the fidelity and practicality of radar training. SUMMARY

[0005] The main purpose of the present application is to provide a method, device, equipment and storage medium for simulating radar main lobe feeding, so as to improve the accuracy and reliability of radar main lobe simulation.

[0006] To achieve the above purpose, the present application provides a method for simulating radar main lobe feeding, applied to a radar simulation system, the radar simulation system comprising a radar antenna, a simulation device antenna, and a simulation device, wherein the simulation device antenna is composed of a plurality of antenna elements, and every three antenna elements form a triplet; the method comprises: obtaining main lobe parameters of the radar antenna and coverage angle parameters of the simulation device antenna, wherein the main lobe parameters are used to indicate the spatial distribution state of the energy of the main lobe beam, the main lobe beam is the lobe with the maximum radiation emitted by the radar antenna, and the coverage angle parameters are used to indicate the angle range covered by the simulation device antenna; if the main lobe parameters match the coverage angle parameters, determining an angle error value, wherein the angle error value is used to indicate the deviation angle between the main lobe beam and a virtual target, and the virtual target is a false radar echo signal generated by the simulation device; determining main lobe beam parameters corresponding to the main lobe beam based on the angle error value, wherein the main lobe beam parameters include main lobe gain, S curve amplitude value and angle interval, the main lobe gain is used to indicate the maximum radiation intensity of the main lobe beam, and the S curve amplitude value is used to indicate the curve of the ratio of the single pulse radar difference path to the sum path signal changing with the angle; determine a set of effective side lobes based on the main lobe beam parameter, wherein each side lobe in the set of effective side lobes has a same S-curve amplitude value as in the main lobe beam range; determine a target triad based on the set of effective side lobes, wherein the target triad is mapped on the simulation device antenna by the main lobe beam; generate a target echo based on the target triad, wherein the target echo is fed back to the radar antenna by the simulation device antenna.

[0007] Optionally, the determining the target triad based on the set of effective side lobes comprises: determining a side lobe beam parameter based on the set of effective side lobes, wherein the side lobe beam parameter comprises a side lobe gain, an S-curve amplitude value of the side lobe, and a side lobe angle interval, and the side lobe gain is used to indicate a radiation intensity of the side lobe; and determining the target triad based on the side lobe beam parameter.

[0008] Optionally, the determining the target triad based on the side lobe beam parameter comprises: determining a plurality of equivalent scattering points composed of respective triads, wherein the equivalent scattering point is used to indicate a direction of a virtual imaginary radiation center by signal interference of three antenna elements corresponding to the triad; and determining the triad corresponding to the composed equivalent scattering point as the target triad if the equivalent scattering point matches the side lobe angle interval in the side lobe beam parameter.

[0009] Optionally, the generating the target echo based on the target triad comprises: determining a gain compensation value based on a main lobe gain in the main lobe beam parameter and a side lobe gain in the side lobe beam parameter; and generating the target echo based on the gain compensation value and the target triad.

[0010] Optionally, the generating the target echo based on the gain compensation value and the target triad comprises: determining an antenna feeding amplitude corresponding to three antenna elements corresponding to the target triad; and adjusting the antenna feeding amplitude by using the gain compensation value to generate the target echo.

[0011] Optionally, the radar simulation system further comprises a radar, and before the main lobe parameter of the radar antenna and the coverage angle parameter of the simulation device antenna are acquired, the method further comprises: acquiring a geometric configuration parameter of the radar simulation system, wherein the geometric configuration parameter is used to indicate a spatial relationship between the radar and the simulation device; determining a center pitch angle of the simulation device antenna relative to the radar antenna, a radar antenna parameter corresponding to the radar antenna, and a simulation device antenna parameter corresponding to the simulation device antenna based on the geometric configuration parameter; and determining the main lobe parameter and the coverage angle parameter based on the pitch angle, the radar antenna parameter, and the simulation device antenna parameter.

[0012] Optionally, determining the target triplet to which the main lobe beam is mapped on the analog device antenna based on the effective sidelobe set comprises: determining a minimum size of an antenna element in the analog device antenna based on the main lobe parameter and the geometric configuration parameter; and determining the target triplet based on the effective sidelobe set and the minimum size.

[0013] In addition, to achieve the above object, the application further provides a device for simulating radar main lobe feeding, applied to a radar simulation system, the radar simulation system comprising a radar antenna, an analog device antenna, and an analog device, wherein the analog device antenna is composed of a plurality of antenna elements, and every three antenna elements form a triplet; the device comprises: an acquisition module, configured to acquire a main lobe parameter of the radar antenna and an angle of coverage parameter of the analog device antenna, wherein the main lobe parameter is used to indicate a spatial distribution state of energy of a main lobe beam, the main lobe beam is a lobe with maximum radiation emitted by the radar antenna, and the angle of coverage parameter is used to indicate an angle of coverage range of the analog device antenna; a first determination module, configured to determine an angle error value if the main lobe parameter matches the angle of coverage parameter, wherein the angle error value is used to indicate a deviation angle between the main lobe beam and a virtual target, and the virtual target is a false radar echo signal generated by the analog device; a second determination module, configured to determine a main lobe beam parameter corresponding to the main lobe beam based on the angle error value, wherein the main lobe beam parameter comprises a main lobe gain, an S-curve amplitude value, and an angle interval, the main lobe gain is used to indicate a maximum radiation intensity of the main lobe beam, and the S-curve amplitude value is used to indicate a curve of a sum-to-difference signal ratio of a monopulse radar with respect to an angle; a third determination module, configured to determine an effective sidelobe set emitted by the radar antenna based on the main lobe beam parameter, wherein an S-curve amplitude value of each sidelobe in the effective sidelobe set is consistent with an S-curve amplitude value within a range of the main lobe beam; a fourth determination module, configured to determine a target triplet to which the main lobe beam is mapped on the analog device antenna based on the effective sidelobe set; and a generation module, configured to generate a target echo fed back to the radar antenna by the analog device antenna based on the target triplet.

[0014] The application further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method for simulating radar main lobe feeding according to any one of the above when executing the computer program.

[0015] The application further provides a computer readable storage medium, having a computer program stored thereon, and the computer program is executable on a processor to implement the method for simulating radar main lobe feeding according to any one of the above.

[0016] The method for feeding in the main lobe of the simulated radar of the application matches the main lobe parameters corresponding to the main lobe emitted by the radar antenna and the coverage angle parameters of the simulation device, determines the angle error value between the main lobe beam and the virtual target when the two are matched, determines the main lobe beam parameters and the effective sidelobe set capable of meeting the angle simulation requirements within the main lobe beam parameter range, and further determines the target triplet of the main lobe beam mapped on the simulation device antenna, and generates the target echo fed back to the radar antenna by the simulation device antenna through the target triplet. Since the application generates the target triplet of the main lobe beam mapped on the simulation device antenna, the generation of the target echo is directly based on the spatial mapping relationship between the main lobe beam and the simulation device, which ensures that the echo characteristics are highly matched with the main lobe parameters, and improves the accuracy and reliability of the radar main lobe simulation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the effective spatial relationship between the radar antenna and the simulation device antenna of an embodiment of the application; Figure 2 is a schematic diagram of a use scenario of an embodiment of the application; Figure 3 is one of the flowcharts of a method for feeding in the main lobe of the simulated radar of an embodiment of the application; Figure 4 is a schematic diagram of the radar and / or difference path direction of an embodiment of the application; Figure 5 is a schematic diagram of the difference and ratio S curve and phase relationship of an embodiment of the application; Figure 6(a) is one of the schematic diagrams of the simulation device antenna element form of an embodiment of the application; Figure 6(b) is another schematic diagram of the simulation device antenna element form of an embodiment of the application; Figure 7 is one of the flowcharts of a method for feeding in the main lobe of the simulated radar of an embodiment of the application; Figure 8 is one of the flowcharts of a method for feeding in the main lobe of the simulated radar of an embodiment of the application; Figure 9 is a schematic diagram of the relative position relationship between the antennas of an embodiment of the application; Figure 10 is a flowchart of a method for feeding in the main lobe of the simulated radar of an embodiment of the application; Figure 11(a) is a schematic diagram of the S curve effective angle measurement interval of an embodiment of the application; Figure 11(b) is a schematic diagram of the simulation device antenna effective angle measurement interval of an embodiment of the application; Figure 12(a) is a schematic diagram of the target deviation angle of an embodiment of the application Equivalent diagram on S-curve; Figure 12 (b) is a target deviation angle of an embodiment of the application Equivalent diagram on direction pattern side lobe; Figure 13 Figure 10 is a schematic diagram of a device for simulating radar main lobe feeding of an embodiment of the application; Figure 14 An example of a schematic diagram of a physical structure of an electronic device is shown in Figure 1. In the figure: 1310, acquisition module; 1320, first determination module; 1330, second determination module; 1340, third determination module; 1350, fourth determination module; 1360, generation module; 1410, processor; 1420, communication interface; 1430, memory; 1440, communication bus.

[0018] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the application more clear, the technical solutions in the application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0020] At present, with the rapid development of simulation technology, simulation devices are more and more widely used in the research and development, testing and operation of radar, electronic warfare and other equipment.

[0021] In the related art, traditional simulation methods are mainly divided into two categories: airborne platform assisted simulation and electrically scanned radar sidelobe simulation, but both methods have significant defects and are difficult to meet the needs of modern single-pulse radar high-precision training. The airborne platform assisted simulation method relies on an airborne platform (such as a drone or an aircraft) to carry simulation equipment and simulate target echo signals in the air. However, it has the following problems: limited mobility: the motion characteristics of the simulated target are constrained by the performance of the airborne platform, making it difficult to achieve complex maneuvers. Environmental impact: factors such as high-altitude airflow and weather conditions can interfere with the stability of the simulated signal. High cost: involves issues such as airborne platform scheduling, airspace coordination, and communication support, and has safety hazards. The electrically scanned radar sidelobe simulation method uses ground-mounted simulation equipment to inject simulation signals through the radar antenna sidelobe, but it has the following shortcomings: large gain difference between main and sidelobes (usually more than 80 dB), which requires a large power compensation, otherwise the signal is difficult to detect by the radar. Low angle simulation accuracy: only relies on the sum (Σ) signal detection, without simulating the difference (Δ) signal, resulting in random jumping of the simulated target angle within the radar main lobe range, which cannot meet the high-precision application requirements of fire control radars and other high-precision applications. Unstable sidelobe feed-in point: when the radar beam is scanned, the sidelobe feed-in position may fall into the null depth area of the antenna pattern, causing simulation failure. Therefore, the method relying on airborne platforms has high cost, poor adaptability, and is difficult to meet complex training needs. The sidelobe simulation method cannot accurately control the angle, resulting in uncontrollable simulation target position and affecting the training effect.

[0022] Among them, the "sidelobe space feed injection method" is a technical means in radar system testing, target simulation, or anti-jamming verification, which accurately injects simulation signals (such as target echoes, jamming signals) into the sidelobe area of the radar antenna through a space radiation path. Its core is to use the spatial pointing characteristics of the sidelobe in the radar antenna pattern to achieve non-main lobe path injection of signals.

[0023] The pattern of a radar antenna is composed of a main lobe (the main radiation direction with the most concentrated energy) and a sidelobe (a sidelobe outside the main lobe with lower energy but distributed in multiple angle intervals). The essence of the sidelobe space feed injection method is that the signal source (such as the transmitting antenna of the simulation equipment) adjusts its radiation direction according to the angle interval of the radar sidelobe (obtained through radar antenna parameters or measured pattern), so that its signal aims at a specific sidelobe of the radar; the signal propagates through space ("space feed") and is received by the sidelobe of the radar, thereby simulating "target echoes from the sidelobe direction" or "jamming signals invading the sidelobe".

[0024] Compared with main lobe air feed injection (signal injection main lobe) or wired injection (directly connected to the radar receiving end through the cable), the unique characteristics of the side lobe air feed injection are as follows: high flexibility of spatial layout: the main lobe is usually directed to the main detection direction of the radar (such as the long-distance space), if the signal needs to be injected in the direction of the main lobe, it may be limited by the site (such as the need for a long-distance open area) or safety (such as the main lobe energy is strong, and the near-distance injection is easy to damage the equipment). The side lobe is distributed in multiple angles (such as deviating from the main lobe ± 30°, ± 60°, etc.), which can be injected using the side lobe area of the radar, without occupying the "core detection path" of the main lobe, and is suitable for testing in a site-limited or complex electromagnetic environment. The simulation scene is closer to the actual combat: in real combat, the radar not only needs to detect targets in the main lobe direction, but also may face interference in the side lobe direction (such as the enemy using the radar side lobe for electronic countermeasures) or low-altitude / side targets (entering the side lobe coverage range). The side lobe air feed injection can accurately reproduce such scenes, verify the detection capability of the radar to the side lobe target and the anti-side lobe interference performance (such as side lobe cancellation and nulling technology), which is more comprehensive than testing only the main lobe scene. Avoid "overly strong interference" of the main lobe signal: the main lobe gain is usually much higher than the side lobe (such as the main lobe gain is 20 to 40 dB higher than the side lobe), if the main lobe injection signal power is not properly controlled, it may overload the radar receiving system. The side lobe gain is low, and the injection signal power can match the side lobe receiving characteristics, reducing the potential damage risk to the radar hardware.

[0025] In summary, it is to utilize the spatial radiation characteristics of the side lobe to construct a "non-main lobe" signal transmission link for simulating the detection process of the radar to the target / interference in the side lobe direction in the real scene.

[0026] Therefore, there is an urgent need for a ground-mounted, low-cost, high-precision simulation method that can accurately simulate the change of the main lobe target angle in the side lobe feed mode, thereby improving the fidelity and practicality of radar training. Figure 1 is a schematic diagram of the spatial relationship between the radar antenna and the simulation device antenna effective period of an embodiment of the present application, as Figure 1 shown, for a single pulse radar training scene construction, a simulation device is usually mounted near the radar, and through the side lobe air feed injection mode, amplitude modulation, delay modulation, Doppler frequency modulation and other ways are used to provide a target scene for the radar, so as to achieve the training purpose. This figure mainly illustrates that as the radar antenna beam changes, there is always an effective side lobe area in the area covered by the simulation device antenna, the only difference is that the covered side lobe area is different each time, and even the splicing of different areas of two adjacent side lobes, to ensure that in the side lobe coverage area, there is always a corresponding specific position of the main lobe area.

[0027] Figure 2 is a schematic diagram of a use scene of an embodiment of the present application, as Figure 2As shown in the figure, realistic simulation of aerial targets is achieved by setting up simulation equipment on the ground. During the operation, the training system control platform continuously obtains the geometric parameter information of the radar at different times, which may include: beam pointing, working timing, waveform parameters, working frequency and other information, together with the position information of the virtual target at different times, that is, the radar working and virtual target motion information at each moment are corresponding, and sent to the simulation equipment. The simulation equipment determines in real time whether the virtual target is within the beam pointing. When the condition that the virtual target is within the beam pointing is met, the echo signal of the corresponding working frequency is generated according to the target distance, target speed, and working waveform relationship, and radiated toward the direction of the radar antenna through the simulation equipment antenna.

[0028] Figure 3 This is one of the flow charts of a method for simulating radar main lobe feeding according to an embodiment of the present application. The method for simulating radar main lobe feeding can be executed by a processor of an electronic device, such as Figure 3 As shown, the method for simulating radar main lobe feeding may include the following steps: Step 310: Obtain the main lobe parameters of the radar antenna and the coverage angle parameters of the analog device antenna, wherein the main lobe parameters are used to indicate the spatial distribution state of the energy of the main lobe beam, which is the lobe of maximum radiation emitted by the radar antenna, and the coverage angle parameters are used to indicate the angular range covered by the analog device antenna.

[0029] In this implementation, the main lobe parameters of the radar antenna and the coverage angle parameters of the simulation device antenna are obtained, wherein the main lobe parameters may include: the main lobe beam pointing of the radar at different times (denoted as ), working timing, waveform parameters, working frequency and other information, covering angle parameters It may include elevation angle and azimuth angle, wherein the main lobe beam may be referred to as the main lobe for short.

[0030] Alternatively, mainlobe parameters directly reflect the spatial characteristics of the radar's mainlobe. For example, the mainlobe width determines the radar's ability to resolve target direction, while the beam pointing defines the direction of maximum radiation. By obtaining these parameters, the spatial extent and energy distribution of the mainlobe beam can be precisely defined.

[0031] Optionally, the coverage angle parameter specifies the spatial angle range within which the simulation device can respond. The combination of these two parameters accurately determines whether the simulation device's coverage fully encompasses the spatial distribution of the radar mainlobe, avoiding echo omissions due to "partial mainlobe regions not being simulated." It also calibrates beam pointing accuracy to prevent echo energy simulation errors caused by angle offsets.

[0032] Step 320: If the main lobe parameter matches the coverage angle parameter, an angle error value is determined, wherein the angle error value is used to indicate the deviation angle between the main lobe beam and the virtual target, and the virtual target is a false radar echo signal generated by the simulation device.

[0033] In this embodiment, after the main lobe parameter and the coverage angle parameter are obtained in step 310, the two parameters are matched. If the main lobe parameter matches the coverage angle parameter, it indicates that the coverage angle of the simulation antenna is greater than the main lobe beam emitted by the radar antenna, that is, the angle range of the simulation device can theoretically cover the main lobe beam, but cannot reflect the fine alignment relationship between the two in the specific spatial position. Based on this, the angle error value between the main lobe beam and the virtual target is determined, and the “actual position offset” of the virtual target in the main lobe beam is determined.

[0034] For example, assuming that the main lobe beam of the main lobe parameter points to 0°, and the simulation device coverage angle is ±5°, it can be determined that the main lobe parameter matches the coverage angle parameter. However, if the virtual target is actually simulated at a 0.5° position, there is a 0.5° angle deviation, that is, the angle error value is 0.5°.

[0035] Optionally, the monopulse radar angle measurement mainly changes according to the different degrees of deviation of the virtual target from the radar beam pointing within the 3dB beam range of the radar antenna, the sharp change of the difference channel receiving signal, the corresponding change of the S curve, and the monotonic change within the main lobe beam range. The radar measures the ratio k of the difference channel signal and the sum channel signal in the received target echo, and looks up the angle value corresponding to the ratio k value in the S curve within the main lobe beam to represent the deviation angle of the virtual target from the current radar beam pointing. Thus, the angle error value of the virtual target is obtained.

[0036] For example, the change of the polarity of the S curve is consistent with the change of the phase, and represents the polarity relationship of the virtual target from the radar, which can include left-right relationship or high-low relationship. When the monopulse radar angle measurement is performed, the sum beam (Σ) and the difference beam (Δ) are usually set, Figure 4 is a schematic diagram of a radar and / or difference channel direction of an embodiment of the present application, Figure 5 is a schematic diagram of a difference and ratio S curve and phase relationship of an embodiment of the present application, as shown in Figure 4 and Figure 5 The two receiving beam shapes shown in and respectively represent the amplitude, the corresponding angle in space, and the phase difference between the two beams. The sum beam signal can be calculated using formula (1) as follows, and the difference beam signal can be calculated using formula (2) as follows: (1) (2) Wherein, A and B are amplitude coefficients, is a sum beam pattern function, is the difference beam pattern function (approximately linear in a small angular range).

[0037] Angle error signal is the ratio of the difference beam signal to the sum beam signal, which can be expressed using the following formula (3): (3) in, k is the normalization coefficient, which is used to convert the ratio into an angle-dependent linear value. In practical applications, the signal is often converted into a voltage value through logarithmic operation or amplitude detection. Assume that the sum beam voltage is , the difference beam voltage is , then the angle of the virtual target can be calculated by the following formula (4): (4) in, is the system calibration coefficient, which is determined by the radar antenna pattern, receiver gain, etc. Assume that the current virtual target angle position is , then the angle error value can be calculated by the following formula (5): (5) in, The polarity represents which side of the scanning beam the virtual target is located.

[0038] Optionally, determining the angle error value effectively eliminates the microscopic errors under macroscopic matching by quantifying spatial deviations, guiding parameter optimization, and correlating with real scene characteristics, ensuring that the virtual target echo is highly consistent with the physical characteristics of the mainlobe beam, and ultimately significantly improving the accuracy and reliability of radar mainlobe simulation.

[0039] Step 330: Based on the angle error value, determine the main lobe beam parameters corresponding to the main lobe beam, wherein the main lobe beam parameters include main lobe gain, S-curve amplitude value and angle range, the main lobe gain is used to indicate the maximum radiation intensity of the main lobe beam, and the S-curve amplitude value is used to indicate the curve of the ratio of the difference path and sum path signals of the single pulse radar changing with the angle.

[0040] In this embodiment, after the angle error value is determined in the above step 320, the main lobe beam parameters corresponding to the main lobe beam are determined based on the angle error value. For example, the main lobe beam parameters corresponding to the main lobe beam are determined by querying the main lobe 3dB beam parameter table established by the radar antenna parameters. This is only an illustrative example and does not limit the specific method for determining the main lobe beam parameters corresponding to the main lobe beam.

[0041] Optionally, the main lobe beam parameter is determined by the angle error value, which converts the abstract spatial deviation into quantifiable and calculable signal characteristics. This process ensures that the energy, angle measurement signal, and area response of the virtual target echo are strictly consistent with the real main lobe-target interaction scene, fundamentally improving the physical authenticity and logical rigor of the radar main lobe simulation, and providing high-fidelity simulation data for radar system testing, algorithm verification, and other scenarios.

[0042] Step 340: Based on the main lobe beam parameter, determine the effective side lobe set emitted by the radar antenna, wherein the S-curve amplitude value of each side lobe in the effective side lobe set is consistent with the S-curve amplitude value within the main lobe beam range.

[0043] In this embodiment, after determining the main lobe beam parameter in step 330, the effective side lobe set emitted by the radar antenna is determined according to the main lobe beam parameter, for example, by querying the side lobe effective feed area parameter table established by the radar antenna parameters, to determine the effective side lobe set emitted by the radar antenna. This is only an exemplary example and does not limit the specific method of determining the effective side lobe set emitted by the radar antenna.

[0044] Optionally, the simulation of the main lobe and the side lobe is associated through the "angle measurement characteristic equivalence" (S-curve amplitude value consistency), which solves the limitation of traditional main lobe simulation that only focuses on the main lobe and ignores the real impact of the side lobe. It not only makes the simulation scene closer to the actual electromagnetic environment of the radar (multi-lobe coupling), but also ensures the "effectiveness" and "relevance" of the side lobe interference through accurate screening, ultimately making the angle measurement signal characteristics and energy coupling effect of the virtual target echo highly consistent with the real scene, and providing more reliable simulation data for performance testing of the radar system (such as anti-jamming and angle measurement accuracy verification).

[0045] Step 350: Based on the effective side lobe set, determine the target triple mapping the main lobe beam on the antenna of the simulation device.

[0046] In this embodiment, after determining the effective side lobe set in step 340, the target triple mapping the main lobe beam on the antenna of the simulation device is determined from a plurality of triples according to the effective side lobe set.

[0047] Optionally, after the scene is determined, if a single simulation device antenna is used, the position of the radar antenna changes constantly as the radar main lobe beam scans, making it impossible to feed the radar antenna according to the theoretical side lobe feed position, and unable to achieve effective simulation of the main lobe effect of the side lobe. Therefore, the triple concept is introduced, so that the angle that can be simulated by the simulation device can be adjusted within a certain range.

[0048] Optionally, Fig. 6(a) is one of the schematic diagrams of the form of the antenna array element of the simulation device according to the embodiments of the present application, and Fig. 6(b) is another of the schematic diagrams of the form of the antenna array element of the simulation device according to the embodiments of the present application. As shown in Fig. 6(a) and Fig. 6(b), considering the range of instantaneous feed-in angle, a plurality of antenna array elements are used to form the simulation device antenna, and meanwhile, three antenna array elements are selected to form a triplet, and the amplitude correlation of the feed-in signals of the triplet is calculated, so that the signal space is synthesized to meet the radar feed-in angle position. The simulation device antenna adopts the structural form of Figure 4 which is composed of 7 antenna array elements to form 6 triplet regions. Fig. 6(a) represents that the azimuth 3dB beam width is greater than the elevation 3dB beam width; and Fig. 6(b) represents that the elevation 3dB beam width is greater than the azimuth 3dB beam width, both of which are the same antenna array element and are rotated by 90° with respect to each other, representing two erection modes, and one of them can be used. Among them, 0#-6# represent different antenna array elements. Generally, the 3dB beam width of the radar antenna is divided into azimuth and elevation, and the two may be equal or different. When the azimuth and elevation 3dB beam widths are different, the compatibility is realized by rotating 90°, and the utilization rate is high.

[0049] Optionally, the effective sidelobe set determined by retaining only the sidelobes equivalent to the main lobe characteristics avoids the interference of irrelevant sidelobes, and ensures that the target signal generated by the simulation device is completely matched with the main lobe and effective sidelobe echo received by the real radar in the three dimensions of angle, energy and phase. The target triplet guarantees the physical reality of the simulation signal from the bottom layer through “multi-parameter binding”.

[0050] Step 360: Based on the target triplet, the target echo fed back to the radar antenna by the simulation device antenna is generated.

[0051] In this embodiment, after the target triplet is determined in step 350, the target echo fed back to the radar antenna by the simulation device antenna is generated by modulating the antenna feed amplitude of the target triplet.

[0052] For example, it is assumed that the target is covered by the main lobe (angle error 0.5°) and an effective sidelobe (angle difference 5°) at the same time, and the amplitude ratio of the two in the triplet is 3:1 and the phase difference is 180°. The generated echo will be the superposition of the two signals (showing amplitude cancellation effect), which is consistent with the echo characteristics of the target irradiated by multiple lobes at the same time in the real environment.

[0053] Optionally, the target triplet (such as angle coordinates, amplitude characteristics, and phase relationship) is a quantitative description of the interaction characteristics of the main lobe and the effective sidelobe, and the target echo is the physical carrier of these characteristics. The process of generating the echo is essentially to convert the abstract parameters of the triplet into electromagnetic signals that can be received by the radar.

[0054] Optionally, the distance parameter between the virtual target and the radar is explicitly included in the target triplet. Based on this parameter, the delay of the echo signal on the time axis can be accurately controlled when generating the target echo, simulating the time when the echo reaches the radar antenna when the virtual target is at different distances. This is completely consistent with the principle that the main lobe produces a corresponding time delay according to the distance of the virtual target in actual detection, making the distance information of the virtual target in the simulated main lobe detection scene highly accurate.

[0055] In this embodiment, by acquiring the main lobe parameter corresponding to the main lobe beam emitted by the radar antenna and the coverage angle parameter of the simulation device, the two are matched, when the two are matched, the angle error value between the main lobe beam and the virtual target is determined, thereby determining the main lobe beam parameter and the effective side lobe set capable of meeting the angle simulation demand within the main lobe beam parameter range, and further determining the target triplet of the main lobe beam mapped on the simulation device antenna, and generating the target echo fed back by the simulation device antenna to the radar antenna through the target triplet. Since the target triplet of the main lobe beam mapped on the simulation device antenna is generated in the present application, the generation of the target echo is directly based on the spatial mapping relationship between the main lobe beam and the simulation device, ensuring that the echo characteristics are highly matched with the main lobe parameter, and improving the accuracy and reliability of the radar main lobe simulation.

[0056] The above steps will be described in detail below.

[0057] Figure 7 is a flowchart of a method for simulating radar main lobe feeding according to an embodiment of the present application. As shown in Figure 7 Step 350, based on the effective side lobe set, determining the target triplet of the angle parameter covered by the simulation device mapped on the simulation device antenna, can include the following steps: Step 710: Based on the effective side lobe set, determining the side lobe beam parameter, wherein the side lobe beam parameter includes the side lobe gain, the S curve amplitude value of the side lobe, and the side lobe angle interval, and the side lobe gain is used to indicate the radiation intensity of the side lobe.

[0058] Step 720: Based on the side lobe beam parameter, determining the target triplet.

[0059] In this embodiment, according to the effective side lobe set, the side lobe angle interval corresponding to the side lobe beam parameter is determined from the effective side lobe set, wherein the side lobe angle interval can also be referred to as the equivalent feeding angle.

[0060] For example, in the effective side lobe set, the angle error value corresponding S curve amplitude value corresponding to all side lobe angle intervals (denoted as ).

[0061] Optionally, after the sidelobe beam parameters are determined, the angle range in space where the sidelobe actually has an effect is determined, and a plurality of equivalent scattering points are synthesized from each three-element group, and if the equivalent scattering point matches the sidelobe angle interval, that is, the equivalent scattering point is within the sidelobe angle interval, then a three-element group composed of three antenna elements corresponding to the synthesized equivalent scattering point is determined as a target three-element group.

[0062] For example, the amplitude barycenter three-element group positioning method is used, which only considers the influence of the three variables of the amplitude of the three-element group on the equivalent scattering point, and the three phases are not considered. The result is that the equivalent scattering points are only distributed in the triangular region of the three-element group. The relationship between the spherical coordinates of the equivalent scattering point and the feeding amplitude is shown in formulas (6) and (7): (6) (7) Wherein, is the coordinate of the equivalent synthesized radiation center in the radar measurement system, , , is the amplitude of the feeding of the three antenna elements of the three-element group, , , is the coordinate of the three antennas of the three-element group in the radar coordinate system.

[0063] Optionally, the method of simulating the main lobe feeding further comprises: determining a gain compensation value according to the main lobe gain in the main lobe beam parameter and the sidelobe gain in the sidelobe beam parameter; for example, the main lobe gain and the sidelobe gain are subjected to difference operation, and the result obtained can be determined as the gain compensation value. This is only an example and does not limit the specific method of determining the gain compensation value.

[0064] Optionally, after the gain compensation value is determined, the antenna feeding amplitudes corresponding to the three antenna elements in the target three-element group are determined; the gain compensation value is used to adjust the antenna feeding amplitudes to generate a target echo.

[0065] For example, it is assumed that the coordinates of the three antenna elements in the simulation device antenna in the radar coordinate system are respectively , , Wherein, are respectively the maximum difference of the azimuth angle and the maximum difference of the elevation angle between the three elements in the three-element group. At this time, the triangle formed by the three-element group is an isosceles triangle. The configuration calculation of the antenna feeding amplitude obtained by the known equivalent scattering point position is shown in formulas (8) to (10): (8) (9) (10) Optionally, from "effective sidelobe parameter extraction" to "target triplets screening", and then to "gain compensation and feed adjustment", the whole process forms a multi-link verification mechanism: the effectiveness verification of the sidelobe parameter (excluding invalid sidelobe); the spatial rationality verification of the equivalent scattering point (matching the angle interval); the quantification verification of the echo intensity (gain compensation). These verification links greatly reduce the random error and system error in the simulation process, ensure the stability and consistency of the simulation results under different scenarios, and avoid simulation failure due to a single link oversight.

[0066] Figure 8 Figure 3 is a flowchart of a method for simulating radar main lobe feeding according to an embodiment of the present application. As shown in Figure 3, the method for simulating radar main lobe feeding can include the following steps: Figure 8 Step 810: Obtain the geometric configuration parameters of the radar simulation system, wherein the geometric configuration parameters are used to indicate the spatial relationship between the radar and the simulation device; Step 820: Based on the geometric configuration parameters, determine the elevation angle of the center of the simulation device antenna relative to the radar antenna, the radar antenna parameters corresponding to the radar antenna, and the simulation device antenna parameters corresponding to the simulation device antenna; Step 830, based on the elevation angle, the radar antenna parameters and the simulation device antenna parameters, determine the main lobe parameters and the angle parameters. In this embodiment, the geometric configuration parameters of the radar simulation system are obtained, wherein the geometric configuration parameters can include at least but not limited to: erection distance r, that is, the straight-line distance between the center of the radar array surface and the center of the simulation device antenna, radar array surface center height H, simulation device antenna center height h, radar test antenna pattern amplitude and phase characteristics, etc.

[0067] Optionally, after obtaining the geometric configuration parameters, the elevation angle of the center of the simulation device antenna relative to the radar, the antenna parameters of the radar, and the simulation device antenna parameters are determined.

[0068] For example, according to the erection distance r, the radar array surface center height H, and the simulation device antenna center height h, the simulation device antenna center relative to the radar elevation pointing direction can be calculated according to formula (11)

[0069] , unit rad: (11) For another example, the effective parameter table is extracted from the radar test antenna pattern, Table 1 is a main lobe 3dB parameter table, and Table 2 is a sidelobe effective feed-in area parameter table, as shown in Table 1 and Table 2, the parameters corresponding to each angle of the main lobe are one-to-one mapped in each sidelobe. ​

[0070] Table 1 Main lobe 3dB beam parameters

[0071] Table 2 Sidelobe effective feeding area parameters

[0072] For example, based on the installation spacing r and the calculated minimum size L of the simulated device antenna array, the elevation angle range covered by the simulated device is determined. , Figure 9 Schematic diagram of the relative position relationship of antennas in an embodiment of the present application. Figure 9 As shown, the elevation angle range covered by the simulated device is The calculation method of azimuth angle is the same and will not be repeated here. The elevation angle is calculated as shown in the following formula (12) and formula (13): (12) (13) Optionally, the method for simulating radar main lobe feeding further includes: determining the minimum size of antenna array elements in the simulated device antenna based on main lobe parameters and geometric configuration parameters, thereby determining the target triplet based on the minimum size.

[0073] For example, assume that the radar main lobe 3dB beamwidth is , unit is rad, the distance between the radar and the simulation equipment is r, unit is m, then the minimum size L of the simulation equipment antenna array can be calculated using the following formula (14), unit is m: (14) Optionally, precise acquisition of geometric configuration parameters ensures that the simulated signal propagation paths and angular relationships are fully consistent with the physical process of radar detection in real-world scenarios, fundamentally avoiding mainlobe simulation distortion caused by spatial misalignment. Triplet arrays selected based on "minimum size" exhibit more stable inter-element interference characteristics (low mutual coupling and high phase consistency), accurately reproducing the directional information of target scattering within the mainlobe (such as the target's pitch and azimuth offset within the mainlobe), ensuring that the synthesized equivalent scattering points closely match the spatial position and scattering intensity distribution of the actual target within the mainlobe.

[0074] In this embodiment, by acquiring the main lobe parameter corresponding to the main lobe beam and the coverage angle parameter of the simulation device, the two are matched, when the two are matched, the angle error value between the main lobe beam and the virtual target is determined, thereby determining the main lobe beam parameter and the effective sidelobe set capable of meeting the angle simulation demand in the main lobe beam parameter range, and then determining the target triplet of the main lobe mapping on the simulation device antenna, and generating the target echo fed back by the simulation device antenna to the radar antenna through the target triplet. Since the target triplet of the main lobe beam mapping on the simulation device antenna is generated, the generation of the target echo is directly based on the spatial mapping relationship between the main lobe beam and the simulation device, which ensures that the echo characteristics are highly matched with the main lobe parameter, and improves the accuracy and reliability of the radar main lobe simulation.

[0075] The embodiments of the present application are further described below.

[0076] Figure 10 is a flowchart of a three-element sidelobe accurate simulation radar main lobe feeding method according to an embodiment of the present application. As shown in Figure 10 , the method comprises the following steps: Step 1001: acquiring the relevant information of the radar and the simulation device.

[0077] In this embodiment, the relevant information of the radar and the simulation device is acquired, for example, the main lobe beam pointing of the radar, the position of the virtual target in the simulation device, the relevant parameters of the simulation antenna and the coverage range of the simulation device, etc.

[0078] Step 1002: coordinate conversion.

[0079] In this embodiment, the main lobe beam pointing of the radar and the coverage angle parameter are converted in coordinates, so that they are operated in the same coordinate system, for example, converted into the geodetic polar coordinate system.

[0080] Step 1003: determining whether the main lobe beam emitted by the radar matches the coverage range of the simulation device.

[0081] In this embodiment, it is determined whether the main lobe beam emitted by the radar matches the coverage range of the simulation device, if the main lobe beam emitted by the radar matches the coverage range of the simulation device, it means that the coverage range of the simulation device can cover the main lobe beam of the radar at this time, based on this, step 1004 is executed, if the main lobe beam emitted by the radar does not match the coverage range of the simulation device, step 1001 is executed.

[0082] Step 1004: determining the angle interval of the main lobe.

[0083] In this embodiment, the angle interval of the main lobe is determined according to Table 1 above.

[0084] Step 1005: Determine the effective sidelobe set.

[0085] In this embodiment, the effective sidelobe set may be determined by querying Table 2 above.

[0086] Step 1006: Calculate the position information of the virtual target position mapped to the simulated antenna.

[0087] In this embodiment, when the radar beam scans to a certain position When the target angle to be simulated is The center changes within the 3dB beam range. As the target angle changes, the S-curve measurement amplitude value of the corresponding beam changes synchronously. According to the radar main lobe single pulse angle measurement principle, within the effective side lobe set, the appropriate angle value is selected so that the corresponding S-curve amplitude value is equal to the S-curve amplitude value in the theoretical and main lobe angle measurement intervals.

[0088] Optionally, first, determine the angular error between the virtual target and the radar main beam according to the aforementioned formula (5): ; Secondly, in the S-curve main lobe angle calculation interval, find Corresponding S-curve amplitude value ; Figure 11 (a) is a schematic diagram of an effective angle measurement range of an S-curve in an embodiment of the present application. The bold part of the S-curve represents the 3dB angle measurement range of the main lobe and the equivalent angle measurement range of the side lobe; Figure 11 (b) is a schematic diagram of an effective angle measurement range of an analog device antenna in an embodiment of the present application. Figure 11 (b) corresponds to Figure 11 (a). In order to accurately simulate the angle through the side lobe, the effective feeding angle range of the side lobe is shown in the bold part of Figure 11 (a) (excluding the main lobe).

[0089] Optionally, after determining the effective sidelobe set, look up All corresponding equivalent feeding angles ,in, i represents the target number, j Represents the feed angle number that meets the conditions. Figure 12 (a) is a target deviation angle of an embodiment of the present application. Figure 12(b) is an equivalent schematic diagram on the S curve, which shows a target deviation angle in an embodiment of the present application. A schematic diagram of the equivalent side lobes in the directional pattern is shown in FIG12 , where specific equivalent positions are marked with circles.

[0090] Step 1007: confirm the target triplet.

[0091] In this embodiment, after the scene is determined, if a single simulation device antenna is used, the position of the radar antenna fed changes constantly as the radar beam scans, so that the radar antenna cannot be fed according to the theoretical sidelobe feeding position, the effective sidelobe simulation main lobe effect cannot be achieved, therefore, the triplet concept is introduced, so that the angle that can be simulated by the simulation device can be adjusted within a certain range. Based on this, during the radar scanning process, the target and the radar beam scanning angle are simulated as needed, the effective sidelobe feeding interval is calculated by the simulation device, as shown in FIG. 6(a) and FIG. 6(b), further determine one of the triplets (A, B, C…F) used, and the amplitude relationship of the three signals of the corresponding triplet (triplet algorithm).

[0092] Optionally, by erecting a distance r, the radar 3dB beam width (that is, the effective interval of the main lobe), the minimum coverage range of the triplet array is determined, that is, no matter how the beam points, there is always an effective sidelobe falling within the simulation antenna angle range of the minimum size L length of the simulation device antenna array.

[0093] Step 1008, amplitude distribution.

[0094] In this embodiment, according to the foregoing formulas (8) to (10), the configuration of the antenna feeding amplitude is determined to determine the amplitude distribution of the target triplet by using the known equivalent scattering point position.

[0095] Step 1009, determine the main lobe gain.

[0096] Step 1010, determine the sidelobe gain.

[0097] Step 1011, calculate the gain compensation value.

[0098] In this embodiment, according to the determined main lobe gain and sidelobe gain, the gain compensation value is calculated by difference operation.

[0099] Step 1012, generate the echo.

[0100] In this embodiment, by obtaining the main lobe parameter corresponding to the main lobe beam emitted by the radar antenna and the coverage angle parameter of the simulation device, the two are matched, when the two are matched, the angle error value between the main lobe beam and the virtual target is determined, thereby determining the main lobe beam parameter and the effective sidelobe set that can meet the angle simulation demand within the main lobe beam parameter range, and further determining the target triplet of the main lobe beam mapped on the simulation device antenna, and generating the target echo of the simulation device antenna fed back to the radar antenna through the target triplet. Since the target triplet of the main lobe beam mapped on the simulation device antenna is generated by the present application, the generation of the target echo is directly based on the spatial mapping relationship between the main lobe beam and the simulation device, which ensures that the echo characteristics are highly matched with the main lobe parameter, and improves the accuracy and reliability of the radar main lobe simulation.

[0101] On the basis of the above-mentioned embodiments, the application further provides a device for simulating radar main lobe feeding. Figure 13 is a schematic diagram of a device for simulating radar main lobe feeding according to an embodiment of the application, as shown in the figure, the device for simulating radar main lobe feeding 1300 can include an acquisition module 1310, a first determination module 1320, a second determination module 1330, a third determination module 1340, a fourth determination module 1350, and a generation module 1360. Figure 13

[0102] The acquisition module 1310 is configured to acquire main lobe parameters of a radar antenna and coverage angle parameters of a simulation device antenna, wherein the main lobe parameters are used to indicate the spatial distribution state of the energy of the main lobe beam, the main lobe beam is the lobe with the maximum radiation emitted by the radar antenna, and the coverage angle parameters are used to indicate the coverage angle range of the simulation device antenna. The first determination module 1320 is configured to determine an angle error value if the main lobe parameters match the coverage angle parameters, wherein the angle error value is used to indicate the deviation angle between the main lobe beam and a virtual target, and the virtual target is a false radar echo signal generated by the simulation device. The second determination module 1330 is configured to determine main lobe beam parameters corresponding to the main lobe beam based on the angle error value, wherein the main lobe beam parameters include main lobe gain, S-curve amplitude value, and angle interval, the main lobe gain is used to indicate the maximum radiation intensity of the main lobe beam, and the S-curve amplitude value is used to indicate the curve of the ratio of the sum and difference signals of the single-pulse radar with respect to the angle. The third determination module 1340 is configured to determine an effective side lobe set emitted by the radar antenna based on the main lobe beam parameters, wherein the S-curve amplitude value of each side lobe in the effective side lobe set is consistent with the S-curve amplitude value within the main lobe beam range. The fourth determination module 1350 is configured to determine a target triple based on the effective side lobe set, which is mapped on the simulation device antenna by the main lobe beam. The generation module 1360 is configured to generate a target echo fed back to the radar antenna by the simulation device antenna based on the target triple.

[0103] ​Thus, the main lobe parameters of the radar antenna and the coverage angle parameters of the simulation device antenna are obtained through the acquisition module 1310, wherein the main lobe parameters are used to indicate the spatial distribution state of the energy of the main lobe beam, and the main lobe beam is the lobe of maximum radiation emitted by the radar antenna, and the coverage angle parameters are used to indicate the coverage angle range of the simulation device antenna; if the main lobe parameters match the coverage angle parameters, the first determination module 1320 determines the angle error value, wherein the angle error value is used to indicate the deviation angle between the main lobe beam and the virtual target, and the virtual target is a false radar echo signal generated by the simulation device; the second determination module 1330 determines the main lobe beam parameters corresponding to the main lobe beam according to the angle error value, wherein the main lobe beam The parameters include main lobe gain, S-curve amplitude value and angle range. The main lobe gain is used to indicate the maximum radiation intensity of the main lobe beam emitted by the radar antenna, and the S-curve amplitude value is used to indicate the curve of the ratio of the difference path and sum path signals of the single pulse radar as the angle changes; the third determination module 1340 determines the effective sidelobe set emitted by the radar antenna based on the main lobe beam parameters, wherein the S-curve amplitude value of each sidelobe in the effective sidelobe set is consistent with the S-curve amplitude value within the main lobe beam range; the fourth determination module 1350 determines the target triplet mapped by the main lobe beam on the analog device antenna based on the effective sidelobe set; the generation module 1360 generates the target echo fed back to the radar antenna by the analog device antenna based on the target triplet.

[0104] In some embodiments, the fourth determination module 1350 is specifically used to: determine the sidelobe beam parameters based on the effective sidelobe set, wherein the sidelobe gain is used to indicate the radiation intensity of the sidelobe, and the sidelobe beam parameters include the sidelobe gain, the sidelobe curve amplitude value and the sidelobe angle range, and the sidelobe gain is used to indicate the radiation intensity of the sidelobe; determine the target triplet based on the sidelobe beam parameters.

[0105] In some embodiments, the fourth determination module 1350 is further specifically used to: determine multiple equivalent scattering points composed of each triplet, wherein the equivalent scattering point is used to indicate the direction of an imaginary radiation center virtualized in space by signal interference through the three antenna array elements corresponding to the triplet; if the equivalent scattering point matches the sidelobe angle interval in the sidelobe beam parameter, the triplet corresponding to the synthesized equivalent scattering point is determined as the target triplet.

[0106] In some embodiments, the fourth determination module 1350 is further specifically used to: determine a gain compensation value based on the mainlobe gain in the mainlobe beam parameters and the sidelobe gain in the sidelobe beam parameters; and generate a target echo based on the gain compensation value and the target triplet.

[0107] In some implementations, the fourth determination module 1350 is further specifically configured to: determine antenna feed amplitudes corresponding to the three antenna array elements corresponding to the target triplet; and adjust the antenna feed amplitudes using the gain compensation value to generate a target echo.

[0108] In some embodiments, the device 1300 for simulating radar main lobe feeding is further configured to: obtain a geometric configuration parameter of the radar simulation system, wherein the geometric configuration parameter is used to indicate a spatial relationship between the radar and the simulation device; determine, based on the geometric configuration parameter, an elevation angle of a center of the simulation device antenna relative to the radar antenna, a radar antenna parameter corresponding to the radar antenna, and a simulation device antenna parameter corresponding to the simulation device antenna; and determine, based on the elevation angle, the radar antenna parameter, and the simulation device antenna parameter, the main lobe parameter and the coverage angle parameter.

[0109] In some embodiments, the fourth determination module 1350 is further configured to: determine, based on the main lobe parameter and the geometric configuration parameter, a minimum size of an antenna element in the simulation device antenna; and determine, based on the effective sidelobe set and the minimum size, the target triple.

[0110] It should be noted that details of the device for simulating radar main lobe feeding in the present embodiment that are not disclosed are for reference to details disclosed in the embodiments of the method for simulating radar main lobe feeding in the present specification, which will not be described herein.

[0111] On the basis of the above-described embodiments, Figure 14 An example of a schematic diagram of a physical structure of an electronic device is shown in FIG. 1, which shows a schematic diagram of a physical structure of an electronic device. Figure 14As shown, the electronic device can include a processor 1410, a communication interface 1420, a memory 1430, and a communication bus 1440, wherein the processor 1410, the communication interface 1420, and the memory 1430 complete mutual communication through the communication bus 1440. The processor 1410 can call the logical instructions in the memory 1430 to execute the method of simulating the main lobe feeding of the radar, which includes: obtaining the main lobe parameter of the radar antenna and the coverage angle parameter of the simulation device antenna, wherein the main lobe parameter is used to indicate the spatial distribution state of the energy of the main lobe beam, the main lobe beam is the lobe with the maximum radiation emitted by the radar antenna, and the coverage angle parameter is used to indicate the angle range covered by the simulation device antenna; if the main lobe parameter matches the coverage angle parameter, an angle error value is determined, wherein the angle error value is used to indicate the deviation angle between the main lobe beam and the virtual target, and the virtual target is a false radar echo signal generated by the simulation device; based on the angle error value, the main lobe beam parameter corresponding to the main lobe beam is determined, wherein the main lobe beam parameter includes the main lobe gain, the S curve amplitude value, and the angle interval, the main lobe gain is used to indicate the maximum radiation intensity of the main lobe beam, and the S curve amplitude value is used to indicate the curve of the ratio of the single-pulse radar difference path to the sum path signal changing with the angle; based on the main lobe beam parameter, an effective side lobe set emitted by the radar antenna is determined, wherein the S curve amplitude value of each side lobe in the effective side lobe set is consistent with the S curve amplitude value within the main lobe beam range; based on the effective side lobe set, a target triple is determined which is mapped on the simulation device antenna by the main lobe beam; based on the target triple, a target echo fed back to the radar antenna by the simulation device antenna is generated.

[0112] In addition, the logical instructions in the memory 1430 described above can be implemented in the form of a software function unit and sold or used as an independent product, which can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0113] On the basis of the above-mentioned embodiments, in another aspect, the present application also provides a computer program product, the computer program product comprising a computer program, the computer program being stored on a non-transitory computer-readable storage medium, and the computer program being executable by a processor to cause a computer to perform the method of simulating the radar main lobe feed provided by the above-mentioned methods, the method comprising: obtaining a main lobe parameter of a radar antenna and an angle of coverage parameter of a simulation device antenna, wherein the main lobe parameter is used to indicate a spatial distribution state of energy of a main lobe beam, the main lobe beam being a lobe of maximum radiation emitted by the radar antenna, and the angle of coverage parameter is used to indicate an angle range covered by the simulation device antenna; if the main lobe parameter matches the angle of coverage parameter, determining an angle error value, wherein the angle error value is used to indicate a deviation angle between the main lobe beam and a virtual target, the virtual target being a false radar echo signal generated by the simulation device; based on the angle error value, determining a main lobe beam parameter corresponding to the main lobe beam, wherein the main lobe beam parameter comprises a main lobe gain, an S-curve amplitude value and an angle interval, the main lobe gain being used to indicate a maximum radiation intensity of the main lobe beam, and the S-curve amplitude value being used to indicate a curve of a single-pulse radar difference channel and sum channel signal ratio changing with an angle; based on the main lobe beam parameter, determining an effective side lobe set emitted by the radar antenna, wherein an S-curve amplitude value of each side lobe in the effective side lobe set is consistent with an S-curve amplitude value within the main lobe beam range; based on the effective side lobe set, determining a target triple on the simulation device antenna mapped by the main lobe beam; and based on the target triple, generating a target echo fed back to the radar antenna by the simulation device antenna.

[0114] On the basis of the above-mentioned embodiments, in still another aspect, the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the method for simulating radar main lobe feeding provided by the above-mentioned methods, the method comprising: acquiring a main lobe parameter of a radar antenna and an angle of coverage parameter of a simulation device antenna, wherein the main lobe parameter is used to indicate a spatial distribution state of energy of a main lobe beam, the main lobe beam being a lobe with maximum radiation emitted by the radar antenna, and the angle of coverage parameter is used to indicate an angle range covered by the simulation device antenna; if the main lobe parameter matches the angle of coverage parameter, determining an angle error value, wherein the angle error value is used to indicate a deviation angle between the main lobe beam and a virtual target, the virtual target being a false radar echo signal generated by the simulation device; based on the angle error value, determining a main lobe beam parameter corresponding to the main lobe beam, wherein the main lobe beam parameter comprises a main lobe gain, an S-curve amplitude value and an angle interval, the main lobe gain being used to indicate a maximum radiation intensity of the main lobe beam, and the S-curve amplitude value being used to indicate a curve of a single-pulse radar difference channel and sum channel signal ratio changing with an angle; based on the main lobe beam parameter, determining an effective side lobe set emitted by the radar antenna, wherein an S-curve amplitude value of each side lobe in the effective side lobe set is consistent with an S-curve amplitude value within the main lobe beam range; based on the effective side lobe set, determining a target triple on the simulation device antenna mapped by the main lobe beam; and based on the target triple, generating a target echo fed back to the radar antenna by the simulation device antenna.

[0115] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the present embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0116] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and necessary universal hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions, essentially or in terms of contribution to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

Claims

1. A method for simulating radar main lobe feed, characterized in that: Applied to a radar simulation system, the radar simulation system includes a radar antenna, a simulation device antenna, and a simulation device, wherein the simulation device antenna is composed of multiple antenna array elements, and every three antenna array elements form a triplet; the method includes: Obtaining a main lobe parameter of the radar antenna and a coverage angle parameter of the analog device antenna, wherein the main lobe parameter is used to indicate the spatial distribution state of energy of a main lobe beam, the main lobe beam being the lobe of maximum radiation emitted by the radar antenna, and the coverage angle parameter is used to indicate the angular range covered by the analog device antenna; If the main lobe parameter matches the coverage angle parameter, determining an angle error value, wherein the angle error value is used to indicate a deviation angle between the main lobe beam and a virtual target, where the virtual target is a false radar echo signal generated by the simulation device; Determining main lobe beam parameters corresponding to the main lobe beam based on the angle error value, wherein the main lobe beam parameters include a main lobe gain, an S-curve amplitude value, and an angle interval, the main lobe gain being used to indicate the maximum radiation intensity of the main lobe beam, and the S-curve amplitude value being used to indicate a curve showing a change in the ratio of the difference path and sum path signals of the monopulse radar with angle; Determining, based on the main lobe beam parameters, a valid sidelobe set emitted by the radar antenna, wherein an S-curve amplitude value of each sidelobe in the valid sidelobe set is consistent with an S-curve amplitude value within the main lobe beam range; Determining a target triplet of the mainlobe beam mapped onto the analog device antenna based on the effective sidelobe set; Based on the target triplet, a target echo fed back by the analog device antenna to the radar antenna is generated.

2. The method for simulating radar main lobe feeding according to claim 1, characterized in that: The determining, based on the effective sidelobe set, a target triplet of the mainlobe beam mapped onto the analog device antenna includes: Determining sidelobe beam parameters based on the effective sidelobe set, wherein the sidelobe beam parameters include sidelobe gain, an S-curve amplitude value of the sidelobe, and a sidelobe angle interval, and the sidelobe gain is used to indicate the radiation intensity of the sidelobe; The target triplet is determined based on the sidelobe beam parameters.

3. The method for simulating radar main lobe feeding according to claim 2, characterized in that: The determining the target triplet based on the sidelobe beam parameters includes: Determining a plurality of equivalent scattering points formed by each of the three-element groups, wherein the equivalent scattering point is used to indicate the direction of an imaginary radiation center created in space by signal interference passing through the three antenna array elements corresponding to the three-element group; If the equivalent scattering point matches the sidelobe angle interval in the sidelobe beam parameter, the triplet corresponding to the synthesized equivalent scattering point is determined as the target triplet.

4. The method for simulating radar main lobe feeding according to claim 2, characterized in that: The generating, based on the target triplet, a target echo fed back by the analog device antenna to the radar antenna includes: Determining a gain compensation value based on a mainlobe gain in the mainlobe beam parameters and a sidelobe gain in the sidelobe beam parameters; The target echo is generated based on the gain compensation value and the target triplet.

5. The method for simulating radar main lobe feeding according to claim 4, characterized in that: The generating the target echo based on the gain compensation value and the target triplet includes: Determining antenna feed amplitudes corresponding to the three antenna array elements corresponding to the target triplet; The antenna feeding amplitude is adjusted using the gain compensation value to generate the target echo.

6. The method for simulating radar main lobe feeding according to claim 1, characterized in that: The radar simulation system further includes a radar. Before obtaining the main lobe parameters of the radar antenna and the coverage angle parameters of the simulation device antenna, the method further includes: Acquiring geometric configuration parameters of the radar simulation system, wherein the geometric configuration parameters are used to indicate a spatial relationship between the radar and the simulation device; determining, based on the geometric configuration parameters, an elevation angle of a center of the analog device antenna relative to the radar antenna, radar antenna parameters corresponding to the radar antenna, and analog device antenna parameters corresponding to the analog device antenna; The main lobe parameter and the coverage angle parameter are determined based on the elevation angle, the radar antenna parameter, and the analog device antenna parameter.

7. The method for simulating radar main lobe feeding according to claim 6, characterized in that: The determining, based on the effective sidelobe set, a target triplet of the mainlobe beam mapped onto the analog device antenna includes: Determining a minimum size of the antenna array element in the analog device antenna based on the main lobe parameters and the geometric configuration parameters; The target triplet is determined based on the valid sidelobe set and the minimum size.

8. A device for simulating radar main lobe feed, characterized in that: Applied to a radar simulation system, the radar simulation system includes a radar antenna, a simulation device antenna, and a simulation device, wherein the simulation device antenna is composed of multiple antenna array elements, and each three antenna array elements form a triplet; the device includes: an acquisition module, configured to acquire a main lobe parameter of the radar antenna and a coverage angle parameter of the analog device antenna, wherein the main lobe parameter is used to indicate the spatial distribution state of energy of a main lobe beam, the main lobe beam being the lobe of maximum radiation emitted by the radar antenna, and the coverage angle parameter is used to indicate the angular range covered by the analog device antenna; a first determining module, configured to determine an angle error value if the main lobe parameter matches the coverage angle parameter, wherein the angle error value is used to indicate a deviation angle between the main lobe beam and a virtual target, where the virtual target is a false radar echo signal generated by the simulation device; a second determination module, configured to determine main lobe beam parameters corresponding to the main lobe beam based on the angle error value, wherein the main lobe beam parameters include a main lobe gain, an S-curve amplitude value, and an angle interval, the main lobe gain being used to indicate the maximum radiation intensity of the main lobe beam, and the S-curve amplitude value being used to indicate a curve showing a change in the ratio of a difference path signal to a sum path signal of a monopulse radar with an angle; a third determining module, configured to determine, based on the main lobe beam parameters, a set of effective side lobes emitted by the radar antenna, wherein an S-curve amplitude value of each side lobe in the effective side lobe set is consistent with an S-curve amplitude value within the main lobe beam range; A fourth determining module is configured to determine a target triplet of the main lobe beam mapped onto the analog device antenna based on the effective side lobe set; A generating module is used to generate a target echo fed back by the analog device antenna to the radar antenna based on the target triplet.

9. An electronic device, characterized in that: The method comprises a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the method for simulating radar main lobe feeding according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that A computer program is stored thereon, and when the program is executed by a processor, the method for simulating radar main lobe feeding according to any one of claims 1 to 7 is implemented.

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