A method, apparatus, device, and storage medium for simulating radar main lobe feeding.

Abstract

This application discloses a method, apparatus, device, and storage medium for simulating radar main lobe feeding, relating to the field of radar simulation technology and applied to radar simulation systems. The radar simulation system includes a radar antenna, a simulation device antenna, and a simulation device. The method includes: acquiring the main lobe parameters of the radar antenna and the coverage angle parameters of the simulation device antenna; if the main lobe parameters match the coverage angle parameters, determining the angle error value; based on the angle error value, determining the main lobe beam parameters corresponding to the main lobe beam, wherein the main lobe beam parameters include main lobe gain, S-curve amplitude, and angle range; based on the main lobe beam parameters, determining the effective sidelobe set emitted by the radar antenna; based on the effective sidelobe set, determining the target triplet mapped by the main lobe beam onto the simulation device antenna; and based on the target triplet, generating the target echo fed back from the simulation device antenna to the radar antenna. This application can improve the accuracy and reliability of radar main lobe simulation.

Description

Technical Field

[0001] This application relates to the field of radar simulation technology, and in particular to a method, apparatus, device, and storage medium for simulating radar main lobe feeding. Background Technology

[0002] Currently, with the rapid development of simulation technology, simulation equipment is being used more and more widely in the research and development testing of equipment such as radar and electronic warfare, as well as in the training of operators.

[0003] In related technologies, traditional simulation methods are mainly divided into two categories: platform-assisted simulation and electronically scanned radar sidelobe simulation. However, methods relying on platforms are costly, have poor adaptability, and are difficult to meet complex training needs. Sidelobe simulation methods cannot precisely control the angle, resulting in uncontrollable simulated target positions and affecting training effectiveness.

[0004] Therefore, there is an urgent need for a ground-based, low-cost, and high-precision simulation method that can accurately simulate the target angle changes of the main lobe in the sidelobe feeding mode, thereby improving the accuracy and reliability of radar main lobe simulation and thus enhancing the realism and practicality of radar training. Summary of the Invention

[0005] The main objective of this application is to provide a method, apparatus, device, 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 objectives, this application provides a method for simulating radar main lobe feeding, applied to a radar simulation system. The radar simulation system includes a radar antenna, a simulation equipment antenna, and a simulation device. The simulation equipment antenna consists of multiple antenna elements, with every three antenna elements forming a triplet. The method includes:

[0007] Obtain the main lobe parameters of the radar antenna and the coverage angle parameters of the analog device antenna. The main lobe parameters are used to indicate the spatial distribution of the energy of the main lobe beam, which is the maximum radiation lobe emitted by the radar antenna. The coverage angle parameters are used to indicate the angular range covered by the analog device antenna.

[0008] If the main lobe parameters match the coverage angle parameters, then the angle error value is determined. The angle error value is used to indicate the deviation angle between the main lobe beam and the virtual target, which is a false radar echo signal generated by the simulation equipment.

[0009] Based on the angle error value, the main lobe beam parameters corresponding to the main lobe beam are determined. The main lobe beam parameters include the main lobe gain, the S-curve amplitude value, and the 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 differential path to the sum path signal of the monopulse radar as a function of the angle.

[0010] Based on the main lobe beam parameters, the effective sidelobe set emitted by the radar antenna is determined, 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.

[0011] Based on the effective sidelobe set, the target triplet of the main lobe beam mapping on the analog device antenna is determined;

[0012] Based on the target triplet, the target echo fed back to the radar antenna from the simulated device antenna is generated.

[0013] Optionally, based on the effective sidelobe set, the target triplet mapped onto the analog device antenna by the main lobe beam is determined, including: determining the sidelobe beam parameters based on the effective sidelobe set, wherein the sidelobe beam parameters include the sidelobe gain, the S-curve amplitude value of the sidelobe, and the sidelobe angle range, and the sidelobe gain is used to indicate the radiation intensity of the sidelobe; and determining the target triplet based on the sidelobe beam parameters.

[0014] Optionally, based on the sidelobe beam parameters, the target triplet is determined, including: determining multiple equivalent scattering points composed of each triplet, wherein the equivalent scattering points are used to indicate the direction of a virtual radiation center in space through the signal interference of the three antenna elements corresponding to the triplet; if the equivalent scattering points match the sidelobe angle range in the sidelobe beam parameters, then the triplet corresponding to the synthesized equivalent scattering points is determined as the target triplet.

[0015] Optionally, based on the target triplet, a target echo fed back from the device antenna to the radar antenna is generated, including: determining a gain compensation value based on the main lobe gain in the main lobe beam parameters and the sidelobe gain in the sidelobe beam parameters; and generating the target echo based on the gain compensation value and the target triplet.

[0016] Optionally, based on the gain compensation value and the target triplet, the target echo is generated, including: determining the antenna feed amplitude corresponding to the three antenna elements of the target triplet; adjusting the antenna feed amplitude using the gain compensation value to generate the target echo.

[0017] Optionally, the radar simulation system also includes a radar. Before acquiring the main lobe parameters of the radar antenna and the coverage angle parameters of the simulation device antenna, the method for simulating the radar main lobe feeding further includes: acquiring 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; based on the geometric configuration parameters, determining 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; and based on the elevation angle, the radar antenna parameters, and the simulation device antenna parameters, determining the main lobe parameters and the coverage angle parameters.

[0018] Optionally, determining the target triplet mapped onto the analog device antenna based on the effective sidelobe set includes: determining the minimum size of the antenna array elements in the analog device antenna based on the main lobe parameters and geometric configuration parameters; and determining the target triplet based on the effective sidelobe set and the minimum size.

[0019] Furthermore, to achieve the above objectives, this application also provides a device for simulating radar main lobe feeding, applied to a radar simulation system. The radar simulation system includes a radar antenna, a simulation device antenna, and a simulation device. The simulation device antenna consists of multiple antenna elements, with every three antenna elements forming a triplet. The device includes: an acquisition module for acquiring the main lobe parameters of the radar antenna and the coverage angle parameters of the simulation device antenna, wherein the main lobe parameters indicate the spatial distribution of the main lobe beam's energy, the main lobe beam being the maximum radiating lobe emitted by the radar antenna, and the coverage angle parameters indicating the coverage angle range of the simulation device antenna; and a first determination module for determining an angle error value if the main lobe parameters match the coverage angle parameters, wherein the angle error value indicates the deviation angle between the main lobe beam and the virtual target, the virtual target being the simulated radar antenna. The system comprises the following modules: a first module for generating false radar echo signals; a second determining module for determining the main lobe beam parameters corresponding to the main lobe beam based on the angle error value, wherein the main lobe beam parameters include the main lobe gain, the S-curve amplitude value, and the angle range, the main lobe gain indicating the maximum radiation intensity of the main lobe beam, and the S-curve amplitude value indicating the curve of the ratio of the differential and sum signals of the monopulse radar changing with the angle; a third determining module for determining 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; a fourth determining module for determining the target triplet mapped by the main lobe beam onto the analog device antenna based on the effective sidelobe set; and a generation module for generating the target echo fed back from the analog device antenna to the radar antenna based on the target triplet.

[0020] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the analog radar main lobe feeding method as described above.

[0021] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the analog radar main lobe feeding method as described above.

[0022] The method for simulating radar main lobe feeding in this application obtains the main lobe parameters corresponding to the main lobe emitted by the radar antenna and the coverage angle parameters of the simulation equipment, matches the two, and determines the angular error value between the main lobe beam and the virtual target when they match. This determines the main lobe beam parameters and the effective set of sidelobes that can meet the angle simulation requirements within the main lobe beam parameter range. Furthermore, it determines the target triplet mapped by the main lobe beam onto the simulation equipment antenna, and generates the target echo fed back from the simulation equipment antenna to the radar antenna using the target triplet. Because this application generates the target triplet mapped by the main lobe beam onto the simulation equipment antenna, the generation of the target echo is directly based on the spatial mapping relationship between the main lobe beam and the simulation equipment, ensuring a high degree of matching between the echo characteristics and the main lobe parameters, thus improving the accuracy and reliability of radar main lobe simulation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram illustrating the spatial relationship between the effective periods of a radar antenna and an analog device antenna according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram illustrating one usage scenario of an embodiment of this application;

[0025] Figure 3 This is one of the flowcharts of a method for simulating radar main lobe feeding according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of a radar and / or differential path direction according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the difference and ratio S-curve and phase relationship according to an embodiment of this application;

[0028] Figure 6(a) is a schematic diagram of one of the antenna array elements of an analog device according to an embodiment of this application;

[0029] Figure 6(b) is a second schematic diagram of an antenna array element form of an analog device according to an embodiment of this application;

[0030] Figure 7 This is a second flowchart of a method for simulating radar main lobe feeding according to an embodiment of this application;

[0031] Figure 8 This is the third flowchart of a method for simulating radar main lobe feeding according to an embodiment of this application;

[0032] Figure 9 This is a schematic diagram of the relative positional relationship of antennas according to an embodiment of this application;

[0033] Figure 10 This is a flowchart of a method for accurately simulating radar main lobe feeding using a triplet sidelobe, according to an embodiment of this application.

[0034] Figure 11(a) is a schematic diagram of an effective angle measurement interval of an S-curve according to an embodiment of this application;

[0035] Figure 11(b) is a schematic diagram of the effective angle measurement range of an analog device antenna according to an embodiment of this application;

[0036] Figure 12(a) shows a target deviation angle according to an embodiment of this application. A schematic diagram equivalent to the S-curve;

[0037] Figure 12(b) shows a target deviation angle according to an embodiment of this application. A schematic diagram of the equivalent sidelobe in the radiation pattern;

[0038] Figure 13 This is a schematic diagram of a device for simulating radar main lobe feeding according to an embodiment of this application;

[0039] Figure 14 A schematic diagram of the physical structure of an electronic device is provided;

[0040] In the diagram: 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.

[0041] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] Currently, with the rapid development of simulation technology, simulation equipment is being used more and more widely in the research and development testing of equipment such as radar and electronic warfare, as well as in the training of operators.

[0044] In related technologies, traditional simulation methods are mainly divided into two categories: airborne platform-assisted simulation and electronically scanned radar sidelobe simulation. However, both methods have significant drawbacks and cannot meet the high-precision training requirements of modern monopulse radar. Airborne platform-assisted simulation relies on an airborne platform (such as a UAV or carrier aircraft) carrying simulation equipment to simulate target echo signals in the air. However, it suffers from the following problems: limited maneuverability: the motion characteristics of the simulated target are constrained by the performance of the airborne platform, making it difficult to achieve complex maneuvers. Significant environmental impact: high-altitude airflow, weather conditions, and other factors can interfere with the stability of the simulated signal. High cost: it involves issues such as airborne platform scheduling, airspace coordination, and communication support, and also poses safety hazards. Electronically scanned radar sidelobe simulation uses ground-based simulation equipment, injecting simulated signals into the radar antenna sidelobes. However, it has the following shortcomings: a large gain difference between the main and sidelobes (usually exceeding 80dB), requiring extremely high power compensation; otherwise, the signal is difficult for the radar to detect. Low angle simulation accuracy: Relying solely on sum-path (Σ) signal detection without simulating difference-path (Δ) signals leads to random jumps in the simulated target angle within the radar main lobe range, failing to meet the high-precision requirements of applications such as fire control radar. Unstable sidelobe feed point: During radar beam scanning, the sidelobe feed point may fall into the zero-depth region of the antenna pattern, causing simulation failure. Therefore, methods relying on airborne platforms are costly, have poor adaptability, and are difficult to meet complex training needs. The inability to precisely control the angle in sidelobe simulation methods results in uncontrollable simulated target positions, affecting training effectiveness.

[0045] Among them, the "sidelobe spatial feed injection method" is a technique used in radar system testing, target simulation, or anti-jamming verification to accurately inject simulated signals (such as target echoes or jamming signals) into the sidelobe region of the radar antenna through a spatial radiation path. Its core is to utilize the spatial pointing characteristics of the sidelobes in the radar antenna pattern to achieve signal injection through a non-main lobe path.

[0046] A radar antenna's radiation pattern consists of a main lobe (the main radiation direction with the most concentrated energy) and side lobes (the side lobes outside the main lobe, with lower energy but distributed across multiple angular intervals). The essence of sidelobe-feed injection is that the signal source (such as the transmitting antenna of a simulation device) adjusts its radiation direction according to the angular intervals of the radar sidelobes (obtained through radar antenna parameters or measured radiation patterns), aiming its signal at a specific sidelobe of the radar. The signal propagates through space ("feeding") and is received by the radar's sidelobes, thus simulating "target echoes from the sidelobe direction" or "interference signals intruding from the sidelobe."

[0047] Compared to main lobe-feed injection (signal injected into the main lobe) or wired injection (directly connected to the radar receiver via cable), the uniqueness of sidelobe-feed injection lies in its high spatial layout flexibility: The main lobe usually points towards the radar's primary detection direction (e.g., long-range airspace). If a signal needs to be injected in the direction of the main lobe, it may be limited by the site (e.g., requiring a long open area) or security (e.g., the main lobe has strong energy, and injection at close range can easily damage the equipment). Side lobes, however, are distributed at multiple angles (e.g., ±30°, ±60°, etc., away from the main lobe), allowing injection from the side or rear of the radar, without occupying the "core detection path" of the main lobe. This is suitable for testing in site-constrained or complex electromagnetic environments. Simulated scenarios are closer to real combat: In actual combat, radar not only needs to detect targets in the direction of the main lobe but may also face interference from the direction of the side lobe (e.g., the enemy using the radar side lobes for electronic countermeasures) or low-altitude / lateral targets (entering the side lobe coverage area). Sidelobe injection can accurately reproduce such scenarios, verifying the radar's ability to detect targets on the sidelobe and its resistance to sidelobe interference (such as sidelobe cancellation and null techniques), providing a more comprehensive assessment than testing only the main lobe scenario. It avoids "excessive interference" from the main lobe signal: the main lobe gain is usually much higher than the sidelobe gain (e.g., 20 to 40 dB higher). If the main lobe injection signal power is not properly controlled, it may overload the radar receiving system. Conversely, the sidelobe gain is low, and the injected signal power can match the sidelobe receiving characteristics, reducing the potential risk of damage to the radar hardware.

[0048] In summary, it utilizes the spatial radiation characteristics of the sidelobe to construct a "non-main lobe" signal transmission link to simulate the radar detection process of targets / interference in the sidelobe direction in real-world scenarios.

[0049] Therefore, there is an urgent need for a ground-based, low-cost, and high-precision simulation method that can accurately simulate the target angle changes of the main lobe in the sidelobe feeding mode, thereby improving the realism and practicality of radar training. Figure 1 This is a schematic diagram illustrating the spatial relationship between the effective lifespan of a radar antenna and an analog device antenna according to an embodiment of this application, as shown below. Figure 1 As shown, the construction of a training scenario for a monopulse radar typically involves setting up a simulation device near the radar. Through sidelobe-feed injection, amplitude modulation, delay modulation, and Doppler frequency modulation, a target scenario is provided to the radar to achieve the training objective. This figure mainly illustrates that as the radar antenna beam scans, there will always be an effective sidelobe region within the coverage area of ​​the simulation device antenna. The only difference is that the covered sidelobe region is different each time, and may even be a combination of different regions from two adjacent sidelobes, ensuring that within the sidelobe coverage area, there is always a corresponding specific location of the main lobe region.

[0050] Figure 2 This is a schematic diagram illustrating a usage scenario of an embodiment of this application, such as... Figure 2As shown, by setting up simulation equipment on the ground, a realistic simulation of aerial targets is achieved. During the operation, the training system's central control platform continuously acquires geometric parameter information of the radar at different times, which may include: beam pointing, working sequence, waveform parameters, working frequency, etc. Together with the position information of the virtual target at different times, that is, the radar working and virtual target motion information at each time are correlated 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, according to the target distance, target speed, and working waveform relationship, an echo signal with the corresponding working frequency is generated and radiated towards the radar antenna through the simulation equipment antenna.

[0051] Figure 3 This is one of the flowcharts of a method for simulating radar main lobe feeding according to an embodiment of this application. This 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:

[0052] Step 310: Obtain the main lobe parameters of the radar antenna and the coverage angle parameters of the analog device antenna. The main lobe parameters are used to indicate the spatial distribution of the energy of the main lobe beam, which is the maximum radiation lobe emitted by the radar antenna. The coverage angle parameters are used to indicate the angular range covered by the analog device antenna.

[0053] In this implementation, the main lobe parameters of the radar antenna and the coverage angle parameters of the analog device antenna are obtained. The main lobe parameters may include: the main lobe beam pointing of the radar at different times (denoted as...). Information such as working timing, waveform parameters, and working frequency, covering angle parameters. It can include elevation angle and azimuth angle, where the main lobe beam can be simply referred to as the main lobe.

[0054] Optionally, the main lobe parameters directly reflect the spatial characteristics of the radar main lobe. For example, the main lobe width determines the radar's ability to resolve the target's azimuth, and the beam pointing clarifies the direction of maximum radiation. By obtaining these parameters, the spatial range and energy distribution pattern of the main lobe beam can be accurately defined.

[0055] Optionally, the coverage angle parameter defines the spatial angle range that the simulation equipment can respond to. The combination of the two can accurately determine whether the coverage area of ​​the simulation equipment completely includes the spatial distribution of the radar main lobe, avoiding echo loss due to "partial areas of the main lobe not being simulated"; at the same time, it can calibrate the alignment accuracy of the beam pointing, preventing echo energy simulation errors caused by angular offset.

[0056] Step 320: If the main lobe parameters match the coverage angle parameters, then determine the angle error value, whereby the angle error value is used to indicate the deviation angle between the main lobe beam and the virtual target, which is a false radar echo signal generated by the simulation equipment.

[0057] In this implementation, after obtaining the main lobe parameters and coverage angle parameters in step 310 above, the two are matched. If the main lobe parameters match the coverage angle parameters, it means that the coverage angle of the analog antenna is greater than the main lobe beam emitted by the radar antenna. That is, the angle range of the analog device can theoretically cover the main lobe beam, but it cannot reflect the fine alignment relationship between the two in a 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.

[0058] For example, assuming the main lobe beam pointing is 0° and the coverage angle of the simulation device 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 position of 0.5°, there is an angle deviation of 0.5°, that is, the angle error value is 0.5°.

[0059] Optionally, the angle measurement of a single-pulse radar is mainly based on the fact that the virtual target deviates from the radar beam direction by different degrees within the 3dB beam range of the radar antenna. The differential path received signal changes drastically, and the corresponding S-curve changes accordingly. Moreover, it changes monotonically within the main lobe beam range. The radar calculates the ratio k of the differential path and the sum path signal in the received target echo, and compares the S-curve within the main lobe beam to find the angle value corresponding to the ratio k value. This represents the deviation angle of the virtual target from the current radar beam direction, thereby obtaining the angle error value of the virtual target.

[0060] For example, the change in the polarity of the S-curve corresponds to the change in phase, representing the polarity relationship of the virtual target deviating from the radar, which can include left-right or high-low relationships. When using monopulse radar for angle measurement, sum beams (Σ) and difference beams (Δ) are typically set. Figure 4 This is a schematic diagram of a radar and / or differential path direction according to an embodiment of this application. Figure 5 This is a schematic diagram of the difference and ratio S-curve and phase relationship according to an embodiment of this application, as shown below. Figure 4 and Figure 5 The two receiving beam shapes shown represent the amplitude, spatial corresponding angle, and phase difference between the two beams, respectively. The sum beam signal can be calculated using formula (1), and the difference beam signal can be calculated using formula (2).

[0061] (1)

[0062] (2)

[0063] Where A and B are amplitude coefficients, For the beam pattern function, The difference beam pattern function (approximately linear over a small angular range).

[0064] Angular error signal The ratio of the difference beam signal to the sum beam signal can be expressed using the following formula (3):

[0065] (3)

[0066] in, k This is the normalization coefficient, used to convert the ratio into an angle-dependent linear relationship. In practical applications, the signal is often converted into a voltage value through logarithmic operations or amplitude detection, assuming the beam voltage is... Differential beam voltage is The angle of the virtual target can be calculated using the following formula (4):

[0067] (4)

[0068] in, These are system calibration coefficients, determined by the radar antenna pattern, receiver gain, etc. Assume the current virtual target's angular position is... The angle error value can then be calculated using the following formula (5):

[0069] (5)

[0070] in, The polarity indicates which side of the scanning beam the virtual target is located on.

[0071] Optionally, by determining the angle error value, quantifying spatial deviation, guiding parameter optimization, and associating with real scene characteristics, the micro-error under macro-matching is effectively eliminated, ensuring that the physical characteristics of the virtual target echo and the main lobe beam are highly consistent, and ultimately significantly improving the accuracy and reliability of radar main lobe simulation.

[0072] Step 330: Based on the angle error value, determine the main lobe beam parameters corresponding to the main lobe beam. The main lobe beam parameters include the main lobe gain, the S-curve amplitude value, and the 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 differential path to the sum path signal of the monopulse radar as a function of the angle.

[0073] In this embodiment, after determining the angle error value in step 320 above, the main lobe beam parameters corresponding to the main lobe beam are determined based on the angle error value. For example, the main lobe 3dB beam parameter table established by querying the radar antenna parameters is used to determine the main lobe beam parameters corresponding to the main lobe beam. This is only an example and does not limit the specific method for determining the main lobe beam parameters corresponding to the main lobe beam.

[0074] Optionally, the main lobe beam parameters are determined by the angle error value, transforming the abstract spatial deviation into quantifiable and computable signal characteristics. This process ensures that the energy, angle measurement signal, and regional response of the virtual target echo are strictly consistent with the real main lobe-target interaction scenario, fundamentally improving the physical realism and logical rigor of the radar main lobe simulation, and providing highly reliable simulation data for radar system testing, algorithm verification, and other scenarios.

[0075] Step 340: Based on the main lobe beam parameters, determine the set of effective sidelobes emitted by the radar antenna, 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.

[0076] In this embodiment, after determining the main lobe beam parameters in step 330, the effective sidelobe set emitted by the radar antenna is determined based on the main lobe beam parameters. For example, the effective sidelobe set emitted by the radar antenna is determined by querying the sidelobe effective feed area parameter table established by the radar antenna parameters. This is only an example and does not limit the specific method for determining the effective sidelobe set emitted by the radar antenna.

[0077] Optionally, by linking the simulation of the main lobe and side lobes through "angle measurement characteristic equivalence" (consistent S-curve amplitude values), the limitation of traditional main lobe simulation that "only focuses on the main lobe and ignores the real influence of the side lobes" is overcome. This not only makes the simulated scenario closer to the electromagnetic environment (multi-lobe coupling) of actual radar operation, but also ensures the "effectiveness" and "correlation" of side lobe interference through precise screening. Ultimately, this makes the angle measurement signal characteristics and energy coupling effects of the virtual target echo highly consistent with the real scenario, providing more reliable simulation data for radar system performance testing (such as anti-jamming and angle measurement accuracy verification).

[0078] Step 350: Based on the effective sidelobe set, determine the target triplet that the main lobe beam is mapped onto the analog device antenna.

[0079] In this embodiment, after determining the effective sidelobe set in step 340, the target triplet on which the main lobe beam is mapped onto the analog device antenna is determined from multiple triplets based on the effective sidelobe set.

[0080] Optionally, once the scenario is determined, if a single analog device antenna is used, the position of the radar antenna fed into the radar will change continuously as the radar main lobe beam scans, making it impossible to feed the radar antenna into the side lobe according to the theoretical side lobe feeding position, thus failing to achieve the effect of effectively simulating the main lobe with the side lobe. Therefore, the concept of a triplet is introduced, which allows the angle that the analog device can simulate to be adjusted within a certain range.

[0081] Optionally, Figure 6(a) is a schematic diagram of one type of antenna array element for an analog device according to an embodiment of this application, and Figure 6(b) is a schematic diagram of another type of antenna array element for an analog device according to an embodiment of this application. As shown in Figures 6(a) and 6(b), considering the instantaneous feed angle range, multiple antenna array elements are used to form an analog device antenna. Simultaneously, three antenna array elements are selected to form a triplet. The amplitude-phase relationship of the triplet feed signal is calculated so that the spatially synthesized signal satisfies the radar feed angle position. The analog device antenna adopts... Figure 4 The structure consists of 7 antenna elements, forming 6 triplet regions. Figure 6(a) shows that the azimuth 3dB beamwidth is greater than the elevation 3dB beamwidth; Figure 6(b) shows that the elevation 3dB beamwidth is greater than the azimuth 3dB beamwidth. Both are the same antenna element, rotated 90° relative to each other, representing two different installation methods. Only one method needs to be used. 0#-6# represent different antenna elements. Typically, the 3dB beamwidth of a radar antenna is divided into azimuth and elevation beamwidths, which may be equal or different. When the azimuth and elevation 3dB beamwidths are different, a 90° rotation is used to achieve compatibility and high utilization.

[0082] Optionally, retaining only the effective sidelobe set determined by sidelobes with characteristics equivalent to the main lobe avoids interference from irrelevant sidelobes, ensuring that the target signal generated by the simulation device perfectly matches the main lobe and effective sidelobe echoes received by the real radar in the three dimensions of angle, energy, and phase. The target triplet guarantees the physical authenticity of the simulated signal from the bottom layer through "multi-parameter binding".

[0083] Step 360: Based on the target triplet, generate the target echo that is fed back from the device antenna to the radar antenna.

[0084] In this embodiment, after the target triplet is determined in step 350, the target echo fed back to the radar antenna by modulating the antenna feed amplitude of the target triplet is generated.

[0085] For example, suppose a target is simultaneously covered by the main lobe (angle error 0.5°) and an effective side lobe (angle difference 5°). 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 these two signals (exhibiting an amplitude cancellation effect), which is consistent with the echo characteristics of a target illuminated by multiple lobes in a real environment.

[0086] Optionally, the target triple (such as angular coordinates, amplitude characteristics, and phase relationship) is a quantitative description of the interaction characteristics between the main lobe and the effective sidelobe, while the target echo is the physical carrier of these characteristics. The process of generating the echo is essentially the conversion of the abstract parameters of the triple into electromagnetic signals that can be received by the radar.

[0087] Optionally, the target triple explicitly includes the distance parameter between the virtual target and the radar. When generating the target echo based on this parameter, the time delay of the echo signal can be precisely controlled, simulating the arrival time of the echo at the radar antenna when the virtual target is at different distances. This is entirely consistent with the principle that the radar main lobe generates a corresponding time delay based on the distance to the virtual target in actual detection, making the distance information of the virtual target in the simulated main lobe detection scenario highly accurate.

[0088] In this embodiment, the main lobe parameters corresponding to the main lobe beam emitted by the radar antenna and the coverage angle parameters of the simulation device are obtained and matched. When they match, the angular error value between the main lobe beam and the virtual target is determined, thereby determining the main lobe beam parameters and the effective set of sidelobes that can meet the angle simulation requirements within the range of the main lobe beam parameters. This leads to the determination of the target triplet mapped onto the simulation device antenna by the main lobe beam, and the target echo fed back from the simulation device antenna to the radar antenna is generated using the target triplet. Because this application generates the target triplet mapped onto the simulation device antenna by the main lobe beam, the generation of the target echo is directly based on the spatial mapping relationship between the main lobe beam and the simulation device, ensuring a high degree of matching between the echo characteristics and the main lobe parameters, thus improving the accuracy and reliability of radar main lobe simulation.

[0089] The steps described above will be explained in detail below.

[0090] Figure 7 This is a second flowchart of a method for simulating radar main lobe feeding according to an embodiment of this application. Figure 7 As shown, step 350, based on the effective sidelobe set, determines the target triplet mapped to the analog device antenna by the angle parameters covered by the analog device, which may include the following steps:

[0091] Step 710: Based on the effective sidelobe set, determine the sidelobe beam parameters, which include sidelobe gain, sidelobe S-curve amplitude value and sidelobe angle range. The sidelobe gain is used to indicate the radiation intensity of the sidelobe.

[0092] Step 720: Determine the target triplet based on the sidelobe beam parameters.

[0093] In this embodiment, the sidelobe angle interval corresponding to the sidelobe beam parameter is determined from the effective sidelobe set according to the sidelobe effective feed region parameter table. The sidelobe angle interval can also be called the equivalent feed angle.

[0094] For example, within the set of effective sidelobes, find the angle error value. The corresponding S-curve amplitude value All corresponding sidelobe angle intervals (denoted as) ).

[0095] Optionally, after determining the sidelobe beam parameters, the actual angular range of the sidelobe's influence in space is used to determine the multiple equivalent scattering points formed by each triplet combination. If the equivalent scattering point matches the sidelobe angle range, that is, if the equivalent scattering point is within the sidelobe angle range, then the triplet composed of the three antenna array elements corresponding to the synthesized equivalent scattering point is determined as the target triplet.

[0096] For example, the amplitude centroid triplet positioning method is used. This method only considers the influence of the changes in the three variables of amplitude of the triplet on the equivalent scattering point, while the three phases are all zero and are not considered. As a result, the equivalent scattering point is only distributed within the triangular region of the triplet. The relationship between the spherical coordinates of the equivalent scattering point and the feed amplitude is shown in formulas (6) and (7):

[0097] (6)

[0098] (7)

[0099] in, The coordinates of the equivalent composite radiation center in the radar measurement system. , , The amplitude of the feed for the three antenna elements of the triplet array. , , These are the coordinates of the three antennas in the radar coordinate system.

[0100] Optionally, the method for simulating radar main lobe feeding further includes: determining a gain compensation value based on the main lobe gain in the main lobe beam parameters and the side lobe gain in the side lobe beam parameters; for example, performing a difference operation between the main lobe gain and the side lobe gain, the result of which can be determined as the gain compensation value. This is only an example and does not limit the specific method for determining the gain compensation value.

[0101] Optionally, after determining the gain compensation value, the antenna feed amplitude corresponding to the three antenna array elements in the target triplet is determined; the antenna feed amplitude is adjusted using the gain compensation value to generate the target echo.

[0102] For example, suppose the coordinates of the three antenna elements in the analog device's antenna in the radar coordinate system are as follows: , , ,in, These represent the maximum difference in azimuth and elevation angles between the three elements in the triplet, respectively. The triangle formed by the triplet is then an isosceles triangle. The antenna feed amplitude configuration is calculated using known equivalent scattering point locations, as shown in formulas (8) to (10).

[0103] (8)

[0104] (9)

[0105] (10)

[0106] Optionally, from "effective sidelobe parameter extraction" to "target triplet screening" and then to "gain compensation and feed adjustment," the entire process forms a multi-stage verification mechanism: verification of the effectiveness of sidelobe parameters (excluding invalid sidelobes); verification of the spatial rationality of equivalent scattering points (matching angle range); and quantitative verification of echo intensity (gain compensation). These verification stages significantly reduce random and systematic errors in the simulation process, ensuring stable consistency of simulation results under different scenarios and avoiding simulation failures due to oversights in a single stage.

[0107] Figure 8 This is the third flowchart of a method for simulating radar main lobe feeding according to an embodiment of this application. Figure 8 As shown, the method for simulating radar main lobe feeding may include the following steps:

[0108] 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 equipment;

[0109] Step 820: Based on the geometric configuration parameters, determine the elevation angle of the center of the analog device antenna relative to the radar antenna, the radar antenna parameters corresponding to the radar antenna, and the analog device antenna parameters corresponding to the analog device antenna.

[0110] Step 830: Determine the main lobe parameters and angle parameters based on the elevation angle, radar antenna parameters, and analog device antenna parameters.

[0111] In this embodiment, the geometric configuration parameters of the radar simulation system are obtained. These geometric configuration parameters may include, but are not limited to, the installation spacing r, i.e., the straight-line distance between the center of the radar array and the center of the simulation device antenna, the center height H of the radar array, the center height h of the simulation device antenna, and the amplitude and phase characteristics of the radar test antenna pattern.

[0112] Optionally, after obtaining the geometric configuration parameters, the elevation angle of the analog device antenna center relative to the radar, the radar antenna parameters, and the analog device antenna parameters are determined.

[0113] For example, based on the installation spacing r, the center height H of the radar array, and the center height h of the analog device antenna, the relative elevation pointing of the analog device antenna center to the radar can be calculated using formula (11). Unit: rad

[0114] (11)

[0115] For another example, the effective parameter table is extracted from the radar test antenna pattern. Table 1 is the main lobe 3dB parameter table, and Table 2 is the sidelobe effective feed area parameter table. As shown in Tables 1 and 2, the parameters corresponding to each angle of the main lobe are mapped one by one to each sidelobe.

[0116] Table 1. Main Lobe 3dB Beam Parameters

[0117]

[0118] Table 2. Parameters of the Effective Feed Region of the Sidelobe

[0119]

[0120] For another example, based on the installation spacing r and the calculated minimum size L of the analog equipment antenna array, the elevation angle range covered by the analog equipment is determined. , Figure 9 This is a schematic diagram illustrating the relative positional relationship of antennas according to an embodiment of this application, as shown below. Figure 9 As shown, the range of elevation angles covered by the simulation equipment is... The method for calculating the azimuth angle is the same and will not be repeated here. The calculation of the elevation angle is shown in the following formulas (12) and (13):

[0121] (12)

[0122] (13)

[0123] Optionally, the method for simulating radar main lobe feeding further includes: determining the minimum size of the antenna array elements in the simulated device antenna based on the main lobe parameters and geometric configuration parameters, thereby determining the target triplet based on the minimum size.

[0124] For example, suppose the radar main lobe beamwidth is 3dB. The unit is rad, the distance r between the radar and the analog equipment is m, and the minimum size L of the analog equipment antenna array can be calculated using the following formula (14), in m:

[0125] (14)

[0126] Optionally, accurately acquiring geometric configuration parameters ensures that the simulated signal propagation path and angular relationships are completely consistent with the physical process of "radar detecting targets" in real scenarios, fundamentally avoiding main lobe simulation distortion caused by spatial misalignment. Based on the triplet selected by "minimum size," the interference characteristics between its array elements are more stable (small mutual coupling, high phase consistency), which can accurately reproduce the directional information of target scattering within the main lobe (such as the target's elevation angle and azimuth angle shift in the main lobe), making the synthesized equivalent scattering point highly consistent with the spatial position and scattering intensity distribution of the real target in the main lobe.

[0127] In this embodiment, the main lobe parameters corresponding to the main lobe beam and the coverage angle parameters of the simulation device are obtained and matched. When they match, the angular error value between the main lobe beam and the virtual target is determined, thereby determining the main lobe beam parameters and the effective set of sidelobes that can meet the angle simulation requirements within the range of the main lobe beam parameters. This leads to the determination of the target triplet mapped onto the simulation device antenna, and the target echo fed back from the simulation device antenna to the radar antenna is generated using the target triplet. Because this application generates the target triplet mapped onto the simulation device antenna by the main lobe beam, the generation of the target echo is directly based on the spatial mapping relationship between the main lobe beam and the simulation device, ensuring a high degree of matching between the echo characteristics and the main lobe parameters, thus improving the accuracy and reliability of radar main lobe simulation.

[0128] The embodiments of this application will be further described below.

[0129] Figure 10 This is a flowchart illustrating a method for accurately simulating radar main lobe feeding using a triplet sidelobe, according to an embodiment of this application. Figure 10 As shown, the method includes the following steps:

[0130] Step 1001: Obtain relevant information about the radar and simulation equipment.

[0131] In this embodiment, relevant information about the radar and the simulation device is obtained, such as the direction of the radar's main lobe beam, the location of the virtual target in the simulation device, the relevant parameters of the simulation antenna, and the coverage area of ​​the simulation device.

[0132] Step 1002: Coordinate transformation.

[0133] In this implementation, the main lobe beam direction of the radar was... and coverage angle parameters Perform coordinate transformation so that both can be operated in the same coordinate system. For example, convert both to the geodetic polar coordinate system.

[0134] Step 1003: Determine whether the main lobe beam emitted by the radar matches the coverage area of ​​the simulation equipment.

[0135] In this implementation, 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. 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.

[0136] Step 1004: Determine the angle range of the main lobe.

[0137] In this embodiment, the angle range of the main lobe is determined according to Table 1 above.

[0138] Step 1005: Determine the set of valid sidelobes.

[0139] In this embodiment, the effective sidelobe set can be determined by consulting Table 2 above.

[0140] Step 1006: Calculate the position information of the virtual target position mapped onto the analog antenna.

[0141] In this embodiment, since when the radar beam scans to a certain position At that time, the target angle that needs to be simulated is The beam varies within a 3dB beam range centered on the target. As the target angle changes, the amplitude of the S-curve measurement of the corresponding beam changes synchronously. Based on the principle of radar main lobe single-pulse angle measurement, an appropriate angle value is selected within the effective sidelobe set so that the amplitude of its corresponding S-curve is equal to the amplitude of the S-curve in the theoretical main lobe angle measurement interval.

[0142] Optionally, firstly, the angular error value between the virtual target and the radar main beam direction is determined according to the aforementioned formula (5). Secondly, within the calculation interval of the main lobe angle of the S-curve, search for... The corresponding S-curve amplitude value Figure 11(a) is a schematic diagram of the effective angle measurement range of an S-curve according to an embodiment of this application. The thickened part of the S-curve represents the 3dB angle measurement range of the main lobe and the equivalent angle measurement range of the sidelobe. Figure 11(b) is a schematic diagram of the effective angle measurement range of an analog device antenna according to an embodiment of this application. Figure 11(b) corresponds to Figure 11(a). To accurately simulate the angle through the sidelobe, the effective feed angle range of the sidelobe is shown in the thickened part of Figure 11(a) (excluding the main lobe).

[0143] Optionally, after determining the set of valid sidelobes, search for All corresponding equivalent feed angles ,in, i Represents the target number. j The feed angle number represents the condition met. Figure 12(a) shows a target deviation angle according to an embodiment of this application. A schematic diagram equivalent to the S-curve, Figure 12(b) shows a target deviation angle according to an embodiment of this application. A schematic diagram of the equivalent sidelobe in the radiation pattern; as shown in Figure 12, the specific equivalent locations are marked with ○.

[0144] Step 1007: Confirm the target triplet.

[0145] In this embodiment, after the scene is determined, if a single analog device antenna is used, the position of the feed radar antenna will continuously change as the radar beam scans, making it impossible to feed the radar antenna according to the theoretical sidelobe feed position and achieve the effect of effectively simulating the main lobe with the sidelobe. Therefore, the concept of a triplet is introduced, allowing the angle that the analog device can simulate to be adjusted within a certain range. Based on this, during the radar scanning process, the effective sidelobe feed interval is calculated by the analog device according to the target and radar beam scanning angle as needed, as shown in Figures 6(a) and 6(b). Furthermore, one of the triplets (A, B, C...F) to be used is determined, along with the amplitude relationship of the three signals corresponding to the triplet (triplet algorithm).

[0146] Optionally, this application determines the minimum coverage range of the triplet array by setting the spacing r and the radar 3dB beamwidth (i.e. the effective range of the main lobe). That is, no matter how the beam direction changes, there will always be an effective sidelobe falling within the angular range of the analog antenna with the minimum size L of the analog device antenna array.

[0147] Step 1008, Amplitude Allocation.

[0148] In this embodiment, the amplitude allocation of the target triplet is determined by using the configuration of the antenna feed amplitude obtained by the known equivalent scattering point position according to the aforementioned formulas (8) to (10).

[0149] Step 1009: Determine the main lobe gain.

[0150] Step 1010: Determine the sidelobe gain.

[0151] Step 1011: Calculate the gain compensation value.

[0152] In this embodiment, the gain compensation value is calculated by performing a difference operation on the determined main lobe gain and side lobe gain.

[0153] Step 1012: Generate echo.

[0154] In this embodiment, the main lobe parameters corresponding to the main lobe beam emitted by the radar antenna and the coverage angle parameters of the simulation device are obtained and matched. When they match, the angular error value between the main lobe beam and the virtual target is determined, thereby determining the main lobe beam parameters and the effective set of sidelobes that can meet the angle simulation requirements within the range of the main lobe beam parameters. This leads to the determination of the target triplet mapped onto the simulation device antenna by the main lobe beam, and the target echo fed back from the simulation device antenna to the radar antenna is generated using the target triplet. Because this application generates the target triplet mapped onto the simulation device antenna by the main lobe beam, the generation of the target echo is directly based on the spatial mapping relationship between the main lobe beam and the simulation device, ensuring a high degree of matching between the echo characteristics and the main lobe parameters, thus improving the accuracy and reliability of radar main lobe simulation.

[0155] Based on the above embodiments, this application also provides a device for simulating radar main lobe feeding. Figure 13 This is a schematic diagram of a device for simulating radar main lobe feeding according to an embodiment of this application, as shown below. Figure 13 As shown, the device 1300 for feeding the simulated radar main lobe may 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.

[0156] The acquisition module 1310 is used to acquire the main lobe parameters of the radar antenna and the coverage angle parameters of the analog device antenna. The main lobe parameters indicate the spatial distribution of the main lobe beam's energy, and the main lobe beam is the maximum radiating lobe emitted by the radar antenna. The coverage angle parameters indicate the coverage angle range of the analog device antenna. The first determination module 1320 determines an angle error value if the main lobe parameters match the coverage angle parameters. The angle error value indicates the deviation angle between the main lobe beam and the virtual target, which is a false radar echo signal generated by the analog device. The second determination module 1330 determines the main lobe beam parameters corresponding to the main lobe beam based on the angle error value. The beam parameters include main lobe gain, S-curve amplitude, and angle range. The main lobe gain indicates the maximum radiation intensity of the main lobe beam, and the S-curve amplitude indicates the curve of the ratio of the differential and sum signals of the monopulse radar changing with the angle. The third determining module 1340 is used to determine the effective sidelobe set emitted by the radar antenna based on the main lobe beam parameters, wherein the S-curve amplitude of each sidelobe in the effective sidelobe set is consistent with the S-curve amplitude within the main lobe beam range. The fourth determining module 1350 is used to determine the target triplet mapped by the main lobe beam onto the analog device antenna based on the effective sidelobe set. The generating module 1360 is used to generate the target echo fed back from the analog device antenna to the radar antenna based on the target triplet.

[0157] Therefore, the acquisition module 1310 acquires the main lobe parameters of the radar antenna and the coverage angle parameters of the analog device antenna. The main lobe parameters indicate the spatial distribution of the main lobe beam's energy, and the main lobe beam is the maximum radiating lobe emitted by the radar antenna. The coverage angle parameters indicate the coverage angle range of the analog device antenna. If the main lobe parameters match the coverage angle parameters, the first determination module 1320 determines the angle error value, which indicates the deviation angle between the main lobe beam and the virtual target, where the virtual target is a false radar echo signal generated by the analog device. The second determination module 1330 determines the main lobe beam parameters corresponding to the main lobe beam based on the angle error value. The parameters include main lobe gain, S-curve amplitude, and angle range. The main lobe gain indicates the maximum radiation intensity of the main lobe beam emitted by the radar antenna, and the S-curve amplitude indicates the curve of the ratio of the differential and sum signals of the monopulse radar changing with the angle. The third determining module 1340 determines the effective sidelobe set emitted by the radar antenna based on the main lobe beam parameters, wherein the S-curve amplitude of each sidelobe in the effective sidelobe set is consistent with the S-curve amplitude within the main lobe beam range. The fourth determining module 1350 determines the target triplet mapped by the main lobe beam onto the analog device antenna based on the effective sidelobe set. The generating module 1360 generates the target echo fed back from the analog device antenna to the radar antenna based on the target triplet.

[0158] In some implementations, the fourth determining 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; and determine the target triplet based on the sidelobe beam parameters.

[0159] In some implementations, the fourth determining 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 a virtual radiation center in space through the signal interference of the three antenna array elements corresponding to the triplet; if the equivalent scattering point matches the sidelobe angle range in the sidelobe beam parameters, then the triplet corresponding to the synthesized equivalent scattering point is determined as the target triplet.

[0160] In some implementations, the fourth determining module 1350 is further specifically used to: determine a gain compensation value based on the main lobe gain in the main lobe beam parameters and the side lobe gain in the side lobe beam parameters; and generate a target echo based on the gain compensation value and the target triplet.

[0161] In some implementations, the fourth determining module 1350 is further specifically used to: determine the antenna feed amplitude corresponding to the three antenna array elements corresponding to the target triplet; adjust the antenna feed amplitude using the gain compensation value to generate the target echo.

[0162] In some embodiments, the device 1300 for simulating radar main lobe feeding is further specifically used for: acquiring 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; determining, based on the geometric configuration parameters, 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; and determining, based on the elevation angle, the radar antenna parameters, and the simulation device antenna parameters, the main lobe parameters and the coverage angle parameters.

[0163] In some implementations, the fourth determining module 1350 is also specifically used to: determine the minimum size of the antenna array element in the analog device antenna based on the main lobe parameters and geometric configuration parameters; and determine the target triplet based on the effective sidelobe set and the minimum size.

[0164] It should be noted that for details not disclosed in the simulated radar main lobe feeding device of this embodiment, please refer to the details disclosed in the embodiments of the simulated radar main lobe feeding method in this specification, which will not be repeated here.

[0165] Based on the above embodiments, Figure 14 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 14As shown, the electronic device may 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 communicate with each other through the communication bus 1440. The processor 1410 can call logic instructions in the memory 1430 to execute a method for feeding a simulated radar main lobe. This method includes: acquiring the main lobe parameters of the radar antenna and the coverage angle parameters of the simulated device antenna, wherein the main lobe parameters indicate the spatial distribution of the energy of the main lobe beam, the main lobe beam being the maximum radiated lobe emitted by the radar antenna, and the coverage angle parameters indicating the angular range covered by the simulated device antenna; if the main lobe parameters match the coverage angle parameters, then determining an angle error value, wherein the angle error value indicates the deviation angle between the main lobe beam and the virtual target, the virtual target being a false radar echo signal generated by the simulated device; based on the angle error value... The main lobe beam parameters corresponding to the main lobe beam are determined, including main lobe gain, S-curve amplitude, and angle range. The main lobe gain indicates the maximum radiation intensity of the main lobe beam, and the S-curve amplitude indicates the ratio of the differential and sum signals of the monopulse radar as a function of angle. Based on the main lobe beam parameters, the effective sidelobe set emitted by the radar antenna is determined, wherein the S-curve amplitude of each sidelobe in the effective sidelobe set is consistent with the S-curve amplitude within the main lobe beam range. Based on the effective sidelobe set, the target triplet mapped by the main lobe beam onto the analog device antenna is determined. Based on the target triplet, the target echo fed back from the analog device antenna to the radar antenna is generated.

[0166] Furthermore, the logical instructions in the aforementioned memory 1430 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0167] Based on the above embodiments, in another aspect, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the simulated radar main lobe feeding method provided by the above methods. The method includes: acquiring the main lobe parameters of the radar antenna and the coverage angle parameters of the simulated 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 maximum radiation lobe emitted by the radar antenna, and the coverage angle parameters are used to indicate the angular range covered by the simulated device antenna; if the main lobe parameters match the coverage angle parameters, then determining an angle error value, wherein the angle error value is used to indicate the relationship between the main lobe beam and the virtual... The deviation angle between targets is determined, with the virtual target being a false radar echo signal generated by the simulation device. Based on the angle error value, the main lobe beam parameters corresponding to the main lobe beam are determined. These parameters include main lobe gain, S-curve amplitude, and angle range. The main lobe gain indicates the maximum radiation intensity of the main lobe beam, and the S-curve amplitude indicates the curve showing the ratio of the differential and sum signals of the monopulse radar as a function of angle. Based on the main lobe beam parameters, the effective sidelobe set emitted by the radar antenna is determined, where the S-curve amplitude of each sidelobe in the effective sidelobe set is consistent with the S-curve amplitude within the main lobe beam range. Based on the effective sidelobe set, the target triplet mapped by the main lobe beam onto the simulation device antenna is determined. Based on the target triplet, the target echo fed back from the simulation device antenna to the radar antenna is generated.

[0168] Based on the above embodiments, in another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements a method for feeding a simulated radar main lobe provided by the methods described above. This method includes: acquiring main lobe parameters of a radar antenna and coverage angle parameters of a simulated device antenna, wherein the main lobe parameters indicate the spatial distribution of the energy of the main lobe beam, the main lobe beam being the maximum radiating lobe emitted by the radar antenna, and the coverage angle parameters indicating the angular range covered by the simulated device antenna; if the main lobe parameters match the coverage angle parameters, then determining an angle error value, wherein the angle error value indicates the deviation angle between the main lobe beam and a virtual target, the virtual target being... The simulation device generates a false radar echo signal; based on the angle error value, the main lobe beam parameters corresponding to the main lobe beam are determined, including the main lobe gain, S-curve amplitude, and angle range. The main lobe gain indicates the maximum radiation intensity of the main lobe beam, and the S-curve amplitude indicates the curve of the ratio of the differential and sum signals of the monopulse radar changing with the angle; based on the main lobe beam parameters, the effective sidelobe set emitted by the radar antenna is determined, wherein the S-curve amplitude of each sidelobe in the effective sidelobe set is consistent with the S-curve amplitude within the main lobe beam range; based on the effective sidelobe set, the target triplet mapped by the main lobe beam onto the simulation device antenna is determined; based on the target triplet, the target echo fed back from the simulation device antenna to the radar antenna is generated.

[0169] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0170] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

Claims

1. A method for simulating radar main lobe feeding, characterized in that, The method is applied to a radar simulation system, which includes a radar antenna, a simulation equipment antenna, and a simulation device, wherein the simulation equipment antenna consists of multiple antenna elements, with every three antenna elements forming a triplet; the method includes: 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 of the energy of the main lobe beam, the main lobe beam is the beam 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. If the main lobe parameter matches the coverage angle parameter, then the 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 parameters corresponding to the main lobe beam are determined, 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 differential path to the sum path signal of the monopulse radar as a function of angle; Based on the main lobe beam parameters, the effective sidelobe set emitted by the radar antenna is determined, 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; Based on the effective sidelobe set, the target triplet of the main lobe beam mapped onto the analog device antenna is determined; Based on the target triplet, the target echo is generated and fed back to the radar antenna by the analog device antenna.

2. The method for simulating radar main lobe feeding according to claim 1, characterized in that, The step of determining the target triplet mapped onto the analog device antenna based on the effective sidelobe set includes: Based on the effective sidelobe set, sidelobe beam parameters are determined, wherein the sidelobe beam parameters include sidelobe gain, sidelobe S-curve amplitude value, and sidelobe angle range, 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, Determining the target triplet based on the sidelobe beam parameters includes: Determine multiple equivalent scattering points formed by each of the three elements, wherein the equivalent scattering points are used to indicate the direction of a virtual radiation center in space, which is virtualized by the signal interference of the three antenna elements corresponding to the three elements of the three elements; If the equivalent scattering point matches the sidelobe angle range in the sidelobe beam parameters, then 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 step of generating the target echo fed back from the analog device antenna to the radar antenna based on the target triplet includes: Based on the main lobe gain in the main lobe beam parameters and the side lobe gain in the side lobe beam parameters, the gain compensation value is determined; 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 step of generating the target echo based on the gain compensation value and the target triplet includes: Determine the antenna feed amplitude corresponding to the three antenna array elements of the target triplet; The antenna feed amplitude is adjusted using the gain compensation value to generate the target echo.

6. The method for feeding the simulated radar main lobe according to claim 1, characterized in that, The radar simulation system further includes a radar, and before acquiring the main lobe parameters of the radar antenna and the coverage angle parameters of the simulation device antenna, the method further includes: 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; Based on the geometric configuration parameters, the elevation angle of the center of the analog device antenna relative to the radar antenna, the radar antenna parameters corresponding to the radar antenna, and the analog device antenna parameters corresponding to the analog device antenna are determined. Based on the elevation angle, the radar antenna parameters, and the analog device antenna parameters, the main lobe parameters and the coverage angle parameters are determined.

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

8. A device for simulating radar main lobe feeding, characterized in that, This device is applied to a radar simulation system, which includes a radar antenna, a simulation equipment antenna, and a simulation device. The simulation equipment antenna consists of multiple antenna elements, with every three antenna elements forming a triplet. The device includes: The acquisition module is used to acquire 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 of the energy of the main lobe beam, the main lobe beam is the beam of the 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. The first determining module is used 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 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 determining module is used to determine the main lobe beam parameters corresponding to the main lobe beam based on the angle error value. 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 differential path to the sum path signal of the monopulse radar as a function of the angle. The third determining module is used to determine 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 determining module is used to determine the target triplet mapped by the main lobe beam onto the analog device antenna based on the effective sidelobe set; The generation module is used to generate the target echo fed back from the analog device antenna to the radar antenna based on the target triplet.

9. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method of feeding the analog radar main lobe as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the method of feeding the simulated radar main lobe as described in any one of claims 1 to 7.

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