A simulation method based on consistency of sea clutter scattering resolution of dual-base radar

Abstract

The application discloses a simulation method based on consistency of ground sea clutter scattering resolution of double base radar, comprising the following steps: according to the relationship between Doppler frequency and azimuth angle, calculating the minimum resolution capable of keeping Doppler resolution of division unit as the azimuth resolution; taking the radar transmitting end as the center, determining the maximum distance, dividing the ground into a plurality of clutter patches C tj based on the azimuth resolution and distance resolution; taking the radar receiving end as the center, dividing a plurality of clutter patches C ri based on the azimuth resolution and distance resolution; judging whether the clutter patches C ri and C tj intersect, if intersecting, the intersecting part will form a double base scattering patch meeting the resolution of the radar transmitting end and receiving end; calculating the area of the convex polygon composed of the double base scattering patch, and calculating the echo signal and intensity of the patch through the radar equation. The application can solve the problem of inconsistent resolution caused by double base scattering.

Description

Technical Field

[0001] This invention relates to the field of radar communication technology, and in particular to a simulation method based on the consistency of ground and sea clutter scattering resolution in bistatic radar. Background Technology

[0002] Detecting and identifying targets using their electromagnetic scattering characteristics is the fundamental working principle of radar. However, targets exist or are concealed within their surrounding environment, and the interference caused by environmental electromagnetic scattering on radar target signal detection is called radar clutter. During radar look-down illumination, the main difficulty arises from various types of ground and sea clutter interference. Clutter modeling and simulation techniques help in selecting target detection methods, thereby ensuring or even improving the overall performance of the radar. The clutter simulation modeling process generally involves first dividing the ground / sea surface into a specific number of equidistant rings according to radar resolution, and then further dividing these equidistant rings into individual small patches based on the radar beamwidth or Doppler resolution, such as... Figure 1 As shown, each fragment, due to its small area, can be considered as having the same distance from all points on the fragment to the radar transmitter, thus being treated as point target scattering. The echo intensity of the small fragment can then be calculated using the radar equations, where the scattering coefficient is related to the surface topography. By considering the range delay, Doppler modulation, and ground scattering power corresponding to each fragment and modulating the radar echo signal, the sum of all fragment echo signals constitutes the total clutter echo. This method is well-suited for clutter modeling of monostatic radars.

[0003] Bistatic / multistatic radar has been extensively studied in recent years, primarily due to its significant advantages and potential in electronic warfare. Firstly, the receiver of a bistatic radar is passive and easily maneuverable, thus possessing stealth capabilities and being difficult to detect. Secondly, strong directional backscatter jamming can only be directed at the transmitter of a bistatic radar, with minimal impact on the receiver. If the enemy employs omnidirectional, wide-bandgap jamming, its power density and jamming effect will naturally decrease, thus enhancing the radar's resistance to active suppression jamming. Thirdly, the radio silence state of a bistatic receiver protects it from anti-radiation missile attacks, and a single bistatic receiver can operate using signals from multiple different transmitters. Fourthly, when positioned forward, a bistatic receiver can detect targets below the transmitter's line of sight, or covertly detect low-altitude targets in distant areas using airborne or space-based illumination sources. Finally, the radar community unanimously agrees that bistatic radar has better anti-stealth potential than monostatic radar.

[0004] Based on the advantages of bistatic radar mentioned above, its role in modern warfare is becoming increasingly important. However, because the transmitter and receiver of a bistatic radar are not located in the same place, the clutter fragmentation based on the radar transmitter location is necessarily different from that based on the radar receiver location. This means that clutter fragments originating from the same range cell for the transmitter may span multiple range cells relative to the receiver.

[0005] exist Figure 2 In (a), at the same angular resolution, because the distance ring is closer to the receiver, one fragment at the transmitter is angularly divided into three fragments at the receiver. Figure 2 In (b), the same range loop is divided into different range cells at the receiver. This problem leads to inconsistent resolution in clutter fragment partitioning, which makes clutter simulation difficult. One feasible approach is to partition the ground / sea fragments finely enough so that they are less than one radar-resolvable cell for both the transmitter and receiver; however, this approach results in a significant increase in the computational complexity of clutter analysis. Summary of the Invention

[0006] To reduce the computational complexity of bistatic scattering clutter simulations while maintaining accuracy, this invention proposes a simulation method based on the consistency of bistatic radar ground and sea clutter scattering resolution, which solves the problem of resolution inconsistency caused by bistatic scattering. This invention re-divides the clutter fragments centered on the radar transmitter with the receiver centered on the receiver, ensuring that the re-divided clutter fragments meet the resolution requirements relative to both the transmitter and receiver. This reduces the computational complexity of the simulation while satisfying the bistatic resolution requirement.

[0007] The technical solution adopted in this invention is as follows:

[0008] A simulation method based on the consistency of ground-sea clutter scattering resolution of bistatic radar includes the following steps:

[0009] S1. Based on the relationship between Doppler frequency and azimuth angle, calculate the minimum resolution that can maintain the Doppler resolution of the dividing unit as the azimuth resolution;

[0010] S2. Centered on the radar transmitter, determine the maximum range, and divide the ground into multiple clutter elements C based on the azimuth resolution and range resolution. tj Centered on the radar receiver, multiple clutter elements C are divided based on the azimuth resolution and range resolution. ri ;

[0011] S3. Determine clutter fragment C ri With C tj Whether they intersect; if they intersect, the intersecting portion will form a bistatic scattering element C that satisfies the resolution of both the radar transmitter and receiver. trk ;

[0012] S4. Calculate the bistatic scattering element C trk The area of ​​the convex polygon formed is calculated, and the echo signal and intensity of the fragment are calculated using radar equations.

[0013] Furthermore, in step S1, if the position of the radar transmitter is r t =(x t ,y t ,z t The linear frequency modulation bandwidth is B, and the distance resolution after pulse compression is... Where c is the speed of light; the radar coherent pulse number is N, the pulse repetition interval is T, and the Doppler resolution is Δf. d =1 / NT, then based on the relationship between Doppler frequency and azimuth angle, the minimum value that can just maintain the Doppler resolution of the dividing unit is selected. As the azimuth resolution, that is:

[0014]

[0015] Where v is the radar velocity and θ is the beam grazing angle. λ is the azimuth angle, and λ is the wavelength.

[0016] Further, in step S2, with the radar transmitter as the center, the maximum range is determined, and the ground is divided into multiple clutter elements C based on the azimuth resolution and range resolution. tj include:

[0017] Centered on the radar transmitter, determine the maximum range based on the range resolution ΔR and the azimuth resolution. The ground is divided into multiple clutter blocks; the distance from the radar transmission center is R, and the azimuth angle is... The four vertices of the fragment are (r) in counterclockwise order. t1 ,r t2 ,r t3 ,r t4 ), and their corresponding positions are as follows:

[0018]

[0019]

[0020]

[0021]

[0022] Since it is on the ground, the z-coordinates are all 0. The four vertices form a rectangular fragment C centered on the transmitter. tj .

[0023] Furthermore, in step S3, the method for determining whether fragments intersect includes: for fragment C tj The four sides (l tj1 ,l tj2 ,l tj3 ,l tj4 ), C ri The four sides (l ri1 ,l ri2 ,l ri3 ,l ri4 The method of finding the intersection point of line segments determines whether the four edges of two fragments intersect. If any two edges intersect, then the two fragments intersect.

[0024] Furthermore, if all edges of two fragments have no intersection, it is necessary to determine whether all four vertices of one fragment are within the other fragment: if they are all within the fragment, then the two fragments intersect; if they are all outside the fragment, then the two fragments do not intersect.

[0025] Furthermore, in step S3, the method for determining whether a point is within a fragment includes: if the coordinates of a point are r ri,1 Calculate to fragment C respectively tj The vectors of the four vertices are v1, v2, v3, and v4. Calculate s1 = v1 × v2, s2 = v2 × v3, s3 = v3 × v4, and s4 = v4 × v1. Then determine whether the z components of the four calculated vectors s1, s2, s3, and s4 have the same sign. If they have the same sign, it means that the point is inside the fragment. If they have different signs, it means that the point is outside the fragment.

[0026] Further, in step S3, the bistatic scattering element C is calculated. trk The methods include:

[0027] For fragment C tj With C ri The four sides are (l tj1 ,l tj2 ,l tj3 ,l tj4 ) and (l ri1 ,l ri2 ,l ri3 ,l ri4 ), calculate the intersection points of the four edges, that is, calculate the intersection points of edge l. tj1 With (l) ri1 ,l ri2 ,l ri3 ,l ri4 ) intersection point, calculate edge l tj2 With (l) ri2 ,l ri2 ,l ri3 ,l ri4The intersection points of the four sides are calculated until all the intersection points of the four sides are calculated, and the set of intersection points of each line segment {P} is recorded. c |l tj crsl ri};

[0028] For the fragment C tj The four vertices (r) tj1 ,r tj2 ,r tj3 ,r tj4 ) Calculate whether it is in C respectively ri Inside, if in C ri The inner record is a set {P} tr |C tj inC ri Similarly, for fragment C ri The four vertices (r) ri1 ,r ri2 ,r ri3 ,r ri4 ) Calculate whether it is within Ct. If it is within Ct, record it as a set {P}. rt |C ri inC tj If there are line segments that do not intersect but are mutually inclusive, then the new bistatic scattering element is:

[0029]

[0030] The final set of intersection points is P = P c ∪P tr ∪P rt Then assemble the intersection points into polygonal fragment C in a counterclockwise manner. trk .

[0031] Furthermore, in step S4, the center point r of all intersection points is first calculated. c And calculate the vector vi from the center point rc to each point; based on the reference vector v ref ={1,0,0}, and calculate each vector v respectively. i With reference vector v ref The counterclockwise angle θ i Its range is [0, 2π); then, arranging the included angles in ascending order, we obtain the corresponding intersecting polygon C. trk Its vertices are arranged in a counter-clockwise sequence; finally, the polygon C is calculated. trk The area of ​​the element is used to calculate the echo signal and its intensity using radar equations.

[0032] Furthermore, in step S4, the method for calculating the area of ​​an arbitrary convex polygon includes the triangulation method: dividing the convex polygon into multiple triangles and calculating the area of ​​each triangle. Finally, the sum of the areas of the triangles is the area of ​​the polygon.

[0033] Furthermore, the triangulation method includes the following steps: For a polygon with n points, arbitrarily select one point of the polygon as the starting point, find the next two points counterclockwise to form a triangle, at which point n-1 points remain; then arbitrarily select another starting point from the remaining n-1 points, and find the next two points to form a second triangle, until no new triangle can be obtained.

[0034] The beneficial effects of this invention are as follows:

[0035] (1) In view of the problem that the transmitting end and receiving end of bistatic radar are not in the same location, resulting in different fragments divided according to the same resolution relative to the transmitting end and the receiving end, this invention proposes a fragment secondary segmentation algorithm based on bistatic scattering, so that the re-divided clutter fragments meet the resolution requirements relative to both the transmitting end and the receiving end, thereby ensuring the minimum number of fragments while satisfying the resolution of the transmitting and receiving ends.

[0036] (2) This invention uses a geometric method based on the segmentation and synthesis of intersecting polygons to solve the problem of resolution inconsistency between the bistatic scattering transmitter and receiver due to factors such as distance and angle. This method is simple to implement and can meet the resolution consistency requirements of bistatic / sea clutter scattering simulation. Attached Figure Description

[0037] Figure 1 Schematic diagram of clutter fragment partitioning.

[0038] Figure 2 A schematic diagram of fragment segmentation methods at the same resolution under bistatic scattering.

[0039] Figure 3 Flowchart of the simulation method in Embodiment 1 of the present invention.

[0040] Figure 4 A schematic diagram showing the relative positions of a point and a convex polygon.

[0041] Figure 5 A schematic diagram showing how a convex polygon is formed by assembling the intersection points counterclockwise.

[0042] Figure 6 A schematic diagram of triangulation of a convex polygon.

[0043] Figure 7 A schematic diagram of a single fragment partitioning operation centered on the transmitter.

[0044] Figure 8A schematic diagram of secondary partitioning of the already divided fragments with the receiving end as the center. Detailed Implementation

[0045] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments are now described. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention; that is, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0046] Example 1

[0047] This embodiment provides a simulation method based on the consistency of ground-sea clutter scattering resolution of bistatic radar, such as... Figure 3 As shown, it includes the following steps:

[0048] S1. Based on the relationship between Doppler frequency and azimuth angle, calculate the minimum resolution that can maintain the Doppler resolution of the dividing unit as the azimuth resolution;

[0049] S2. Centered on the radar transmitter, determine the maximum range, and divide the ground into multiple clutter elements C based on the azimuth resolution and range resolution. tj Centered on the radar receiver, multiple clutter elements C are divided based on the azimuth resolution and range resolution. ri ;

[0050] S3. Determine clutter elements C ri With C tj Whether they intersect; if they intersect, the intersecting portion will form a bistatic scattering element C that satisfies the resolution of both the radar transmitter and receiver. trk ;

[0051] S4. Calculate the bistatic scattering element C trk The area of ​​the convex polygon formed is calculated, and the echo signal and intensity of the fragment are calculated using radar equations.

[0052] Preferably, in step S1, if the position of the radar transmitter is r t =(x t ,y t ,z t The linear frequency modulation bandwidth is B, and the distance resolution after pulse compression is... Where c is the speed of light; the radar coherent pulse number is N, the pulse repetition interval is T, and the Doppler resolution is Δf. d =1 / NT, then based on the relationship between Doppler frequency and azimuth angle, the minimum value that can just maintain the Doppler resolution of the dividing unit is selected. As the azimuth resolution, that is:

[0053]

[0054] Where v is the radar velocity and θ is the beam grazing angle. Let θ be the azimuth angle and λ be the wavelength. Specifically, if the antenna's 3dB beamwidth is θ... b Then the azimuth resolution is:

[0055]

[0056] Preferably, step S2 includes:

[0057] Centered on the radar transmitter, determine the maximum range based on the range resolution ΔR and the azimuth resolution. The ground is divided into multiple clutter blocks; the distance from the radar transmission center is R, and the azimuth angle is... The four vertices of the fragment are (r) in counterclockwise order. t1 ,r t2 ,r t3 ,r t4 ), and their corresponding positions are as follows:

[0058]

[0059]

[0060]

[0061]

[0062] Since it is on the ground, the z-coordinates are all 0. The four vertices form a rectangular fragment C centered on the transmitter. tj .

[0063] Centered on the radar receiver, multiple clutter fragment blocks are divided at the same resolution. Assume these fragments are defined as C... ri We need to find the relationship with rectangle C. tj The set C of intersecting fragment blocks r ={C ri |with C tj Intersecting}. For any fragment C among them, ri Its four vertex coordinates are (r ri1 ,r ri2 ,r ri3 ,r ri4 ), and determine the fragment C ri With C tj Do they intersect (if fragment C)? ri Completely in C tj or Ctj Completely in C ri The situation in the middle belongs to intersection).

[0064] Preferably, in step S3, the method for determining whether fragments intersect includes: for fragment C tj The four sides (l tj1 ,l tj2 ,l tj3 ,l tj4 ), C ri The four sides (l ri1 ,l ri2 ,l ri3 ,l ri4 To determine whether the four edges of two fragments intersect, we can use the method of finding the intersection point of line segments. If any two edges intersect, then the two fragments intersect. If none of the edges of the two fragments intersect, then we need to determine whether all four vertices of one fragment are inside the other fragment: if they are all inside the fragment, then the two intersect; if they are all outside the fragment, then the two do not intersect.

[0065] Preferably, the method for determining whether a point is within a fragment includes: such as Figure 4 As shown, if the coordinates of a certain point are r ri,1 Calculate to fragment C respectively tj The vectors of the four vertices are v1, v2, v3, and v4. The following calculations are made: s1 = v1 × v2, s2 = v2 × v3, s3 = v3 × v4, and s4 = v4 × v1. Then, it is determined whether the z-components of the four calculated vectors s1, s2, s3, and s4 have the same sign. If they have the same sign, it indicates that the point is inside the fragment; if they have different signs, it indicates that the point is outside the fragment. This method is only applicable to convex polygons. The fragmentation method in this embodiment determines that the fragments can only be convex polygons.

[0066] Preferably, such as Figure 5 As shown, the calculation of the bistatic scattering element C is performed. trk The methods include:

[0067] For fragment C tj With C ri The four sides are (l tj1 ,l tj2 ,l tj3 ,l tj4 ) and (l ri1 ,l ri2 ,l ri3 ,l ri4 ), calculate the intersection points of the four edges, that is, calculate the intersection points of edge l. tj1 With (l) ri1 ,l ri2 ,l ri3 ,l ri4The intersection of (l) and edge ltj2 is calculated. ri2 ,l ri2 ,l ri3 ,l ri4 The intersection points of the four sides are calculated until all the intersection points of the four sides are calculated, and the set of intersection points of each line segment {P} is recorded. c |l tj crsl ri};

[0068] For the fragment C tj The four vertices (r) tj1 ,r tj2 ,r tj3 ,r tj4 ) Calculate whether it is in C respectively ri Inside, if in C ri The inner record is a set {P} tr |C tj inC ri Similarly, for fragment C ri The four vertices (r) ri1 ,r ri2 ,r ri3 ,r ri4 ) Calculate whether it is within Ct. If it is within Ct, record it as a set {P}. rt |C ri inC tj If there are line segments that do not intersect but are mutually inclusive, then the new bistatic scattering element is:

[0069]

[0070] The final set of intersection points is P = P c ∪P tr ∪P rt Then assemble the intersection points into polygonal fragment C in a counterclockwise manner. trk .

[0071] Preferably, in step S4, the center point r of all intersection points is first calculated. c And calculate the center point r c The vector v to each point i Based on reference vector v ref ={1,0,0}, and calculate each vector v respectively. i With reference vector v ref The counterclockwise angle θ i Its range is [0, 2π); then, arranging the included angles in ascending order, we obtain the corresponding intersecting polygon C. trk Its vertices are arranged in a counter-clockwise sequence; finally, the polygon C is calculated. trk The area of ​​the element is used to calculate the echo signal and its intensity using radar equations.

[0072] Preferably, the method for calculating the area of ​​an arbitrary convex polygon includes the triangulation method: dividing the convex polygon into multiple triangles, calculating the area of ​​each triangle, and finally, the sum of the areas of the triangles is the area of ​​the polygon. More preferably, such as Figure 6 As shown, the triangulation method includes the following steps: For a polygon with n points, arbitrarily select one point of the polygon as the starting point, find the next two points counterclockwise to form a triangle, at which point n-1 points remain; then arbitrarily select another starting point from the remaining n-1 points, and find the next two points to form a second triangle, until no new triangle can be obtained.

[0073] The fragment C can be obtained through the above steps. tj With C ri For intersecting polygons, repeat the above steps to calculate all fragments C. t With C r Dividing polygons between them.

[0074] It should be noted that the above method uses quadrilateral fragments as an example, but this method can actually be applied to all convex polygons.

[0075] Assuming the following scenario, the radar transmitter is located at (0km, 0km, 5km), the radar receiver is located at (-30km, 80km, 5km), the single-platform radar resolution is assumed to be 150m, and the angular resolution is assumed to be 1°. Then, the segments centered on the transmitter would be as follows: Figure 7 As shown. The new fragments, which are further divided using the receiver as the fragment unit, are as follows: Figure 8 As shown in the figure, only some of the clutter elements are displayed.

[0076] Example 2

[0077] This embodiment is based on embodiment 1:

[0078] This embodiment provides a computer device, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the simulation method based on the consistency of bistatic radar ground-sea clutter scattering resolution in Embodiment 1. The computer program can be in the form of source code, object code, executable file, or some intermediate form.

[0079] Example 3

[0080] This embodiment is based on embodiment 1:

[0081] This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the simulation method based on the consistency of bistatic radar ground-sea clutter scattering resolution in Embodiment 1. The computer program can be in the form of source code, object code, executable file, or some intermediate form. The storage medium includes any entity or device capable of carrying computer program code, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0082] It should be noted that, for the sake of simplicity, the foregoing method embodiments are described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

Claims

1. A simulation method based on the consistency of ground-sea clutter scattering resolution of bistatic radar, characterized in that, Includes the following steps: S1. Based on the relationship between Doppler frequency and azimuth angle, calculate the minimum resolution that can maintain the Doppler resolution of the dividing unit as the azimuth resolution; S2. Centered on the radar transmitter, determine the maximum range, and divide the ground into multiple clutter elements based on the azimuth resolution and range resolution. ; Centered on the radar receiver, multiple clutter elements are divided based on the azimuth resolution and range resolution. ; S3. Determine clutter elements and Whether they intersect; if they intersect, the intersecting portion will form a bistatic scattering element that satisfies the resolution of both the radar transmitter and receiver. ; S4. Calculate the bistatic scattering element. The area of ​​the convex polygon formed is calculated, and the echo signal and its intensity of the fragment are calculated using radar equations. In step S1, if the location of the radar transmitter is The linear frequency modulation bandwidth is The distance resolution after pulse compression is ,in It's the speed of light; The radar coherent pulse number is The pulse repetition interval is Doppler resolution is Based on the relationship between Doppler frequency and azimuth angle, the minimum value that can just maintain the Doppler resolution of the dividing unit is selected. As the azimuth resolution, that is: in, For radar speed, To rub the ground corner of the beam, It is the azimuth angle. Wavelength; In step S2, with the radar transmitter as the center, the maximum range is determined, and the ground is divided into multiple clutter elements based on the azimuth resolution and range resolution. include: Determine the maximum distance centered on the radar transmitter, based on the range resolution. and azimuth resolution The ground is divided into multiple clutter blocks; distance from the radar transmission center azimuth angle is The four vertices of the fragment are arranged counterclockwise as follows: Their corresponding positions are as follows: Because it is on the ground, therefore All four vertices are 0, and they form a rectangular fragment centered on the transmitter. ; In step S3, the method for determining whether fragments intersect includes: for fragments The four sides , piece The four sides The method of finding the intersection point of line segments is used to determine whether the four edges of two fragments intersect. If any two edges intersect, then the two fragments are determined to intersect.

2. The simulation method based on the consistency of ground-sea clutter scattering resolution of bistatic radar according to claim 1, characterized in that, If all edges of two fragments do not intersect, it is necessary to determine whether all four vertices of one fragment are within the other fragment: if they are all within the fragment, then they intersect; if they are all outside the fragment, then they do not intersect.

3. The simulation method based on the consistency of bistatic radar ground-sea clutter scattering resolution according to claim 1, characterized in that, In step S3, the method for determining whether a point is within a fragment includes: if the coordinates of a point are... Calculate to the fragment level respectively The vectors of the four vertices are , , , and calculate , , , Then, determine the four calculated vectors. , , , of If the components have the same sign, it means the point is inside the fragment; if they have different signs, it means the point is outside the fragment.

4. The simulation method based on the consistency of ground-sea clutter scattering resolution of bistatic radar according to claim 1, characterized in that, In step S3, the bistatic scattering element is calculated. The methods include: For fragments With film The four sides are respectively and Calculate the intersection points of each of the four edges, i.e., calculate the edge intersection points. and Intersection points, calculate edges and The intersection points are calculated until all four sides have been intersected, and the set of intersection points of each line segment is recorded. ; For film elements The four vertices Calculate whether in Inside, if in The internal records are set Similarly, for film elements The four vertices Calculate whether in Inside, if in The internal records are set If there are line segments that do not intersect but are mutually inclusive, then the new bistatic scattering element is: The final set of intersection points is Then assemble the intersection points into polygonal fragments in a counterclockwise manner. .

5. The simulation method based on the consistency of ground-sea clutter scattering resolution of bistatic radar according to claim 4, characterized in that, In step S4, first calculate the center point of all intersection points. And calculate the center point Vectors to each point ; Based on reference vector And calculate each vector separately. With reference vector counterclockwise angle Its scope is Then, arranging the included angles in ascending order, we obtain the corresponding intersecting polygons. The counter-clockwise sequence of its vertices; finally, the polygon is calculated. The area of ​​the element is used to calculate the echo signal and its intensity using radar equations.

6. The simulation method based on the consistency of bistatic radar ground-sea clutter scattering resolution according to claim 5, characterized in that, In step S4, the method for calculating the area of ​​an arbitrary convex polygon includes the triangulation method: dividing the convex polygon into multiple triangles and calculating the area of ​​each triangle. The sum of the areas of the triangles is the area of ​​the polygon.

7. The simulation method based on the consistency of ground-sea clutter scattering resolution of bistatic radar according to claim 6, characterized in that, The triangulation method includes the following steps: For a polygon with n points, arbitrarily select one point of the polygon as the starting point, find the next two points counterclockwise to form a triangle, at which point n-1 points remain; then arbitrarily select another starting point from the remaining n-1 points, and find the next two points to form a second triangle, until no new triangle can be obtained.

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