A digital triad amplitude and phase control method suitable for regional simulation

Abstract

The application relates to a digital triplet amplitude-phase control method suitable for area simulation, which comprises the following steps: according to the position information of all scattering points included in the radar beam coverage range in the current simulation scene, the position of the center point of a scattering area formed by the scattering points is calculated; a center antenna is matched to the position of the center point of the scattering area in an antenna array used for spatial reconstruction of scattering signals; according to the center antenna, the positions of other antennas of a beam subarray used for reconstructing the scattering signals of the scattering area in the antenna array are determined; coarse position control of the scattering area is realized; according to the positions of the scattering points in the beam subarray, a digital triplet used for simulating the signal angle of the scattering point in the beam subarray is determined, and the amplitude of each branch of the triplet is adjusted in the digital domain; fine angle control of each scattering point in the beam subarray is realized, and the scattering signals are reconstructed. The application realizes fine spatial reconstruction of multi-source scene echoes under the radar visual angle.

Description

Technical Field

[0001] This invention relates to the field of radio frequency simulation technology, and in particular to a digital ternary amplitude and phase control method suitable for regional simulation. Background Technology

[0002] In traditional triplet arrays, the target velocity, distance, and amplitude are modulated in the simulator, while the target angle is modulated in the RF amplitude-phase modulation unit of the array feed system. Each channel can only simulate a target scattering point at an independent angle.

[0003] In radar countermeasures simulation, the simulated signals of multiple scattering targets such as targets and interference concentrated in the signal scattering area will constitute multi-source scene echoes from the radar perspective.

[0004] To improve the effectiveness of radar countermeasure simulation, it is necessary to solve the problem of fine reconstruction of echoes from multiple sources under radar perspective. Summary of the Invention

[0005] Based on the above analysis, this invention aims to disclose a digital triplet amplitude and phase control method suitable for regional simulation; it can efficiently reconstruct regional electromagnetic scattering effects in radar detection scenarios. It solves the problem of fine-grained reconstruction of echoes from multi-source scenarios under radar perspective.

[0006] This invention discloses a digital triplet amplitude and phase control method suitable for regional simulation, comprising:

[0007] Step S1: Based on the location information of all scattering points within the radar beam coverage area in the current simulation scenario, calculate the location of the center point of the scattering region formed by the scattering points.

[0008] Step S2: In the antenna array used for spatial reconstruction of the scattered signal, a central antenna is matched for the center point position of the scattering region;

[0009] Step S3: Determine the positions of other antennas in the beam subarray used to reconstruct the scattered signal of the scattering region based on the central antenna; thus achieving coarse position control of the scattering region.

[0010] Step S4: Based on the position of each scattering point within the beam subarray, determine the digital triplet within the beam subarray used to simulate the signal angle of that scattering point; adjust the amplitude of each branch of the antenna in the digital domain for the digital triplet; achieve fine angle control of each scattering point within the beam subarray, and reconstruct the scattering signal.

[0011] Furthermore, in the antenna array used for spatial reconstruction of the scattered signal, in two adjacent rows of antennas, one antenna in any row and two adjacent antennas in the other row form an equilateral triangle as a digital triplet. The amplitude of each antenna branch of the digital triplet is controlled in the digital domain to reconstruct a simulated scattered signal.

[0012] Furthermore, when constructing the scattered echo within the radar beam coverage area, one antenna in the antenna array is designated as the central antenna of the scattering region; this central antenna and the six surrounding adjacent antennas are combined to form an antenna group; this serves as the beam subarray for constructing the scattered echo within the radar beam coverage area.

[0013] Furthermore, the location information of the i-th scattering point within the radar beam coverage area in the current simulation scenario includes the azimuth angle θ. i and pitch angle m is the number of scattering points;

[0014] At the center point of the scattering region,

[0015] Azimuth of the center point

[0016] Pitch angle at center point

[0017] Where, θ max =max{θ1,…,θ i ,…,θ m}, θ min =min{θ1,…,θ i ,…,θ m},

[0018] Furthermore, step S2 includes:

[0019] 1) Connect all the antennas in the antenna array area with lines to divide the array area into multiple triangular frames. The two vertices of the hypotenuse of the triangular frame are the positions of two adjacent antennas. Two triangular frames occupying the same two identical antennas form a rectangular frame. Then, number the rows and columns of the rectangular frames.

[0020] 2) Determine the row and column numbers of the rectangle containing the center point based on the coordinates of the center point of the scattering area;

[0021] 3) Determine the position coordinates of the two antennas within the rectangle containing the center point;

[0022] 4) Calculate the distance between the center point coordinates of the scattering region and the position coordinates of the two antennas; select the antenna with the closest distance as the center antenna of the beam subarray.

[0023] Furthermore, the rectangular frame containing the center point is determined based on the coordinates of the center point of the scattering region, including:

[0024] (1) The coordinates of the center point of the scattering region are normalized using the array angle interval;

[0025] The normalization formula is:

[0026] θ0 / θ * =int(θ0 / θ) * ) + fraction (θ0 / θ * )

[0027]

[0028] `int()` is the integer function; for positive numbers, it selects the largest integer not greater than the normalized value; for negative numbers, it selects the smallest integer not less than the normalized value. The array azimuth spacing... Pitch spacing is ω is the angular spacing between adjacent antennas in the antenna array;

[0029] (2) Set int(θ0 / θ) * ), The value serves as the row and column number of the rectangle containing the center point of the scattering region.

[0030] Furthermore, the position coordinates of the two antennas within the rectangle containing the center point are determined; including:

[0031] Add the row and column numbers of the rectangle containing the center point of the scattering region. When the sum is odd, the two vertices of the rectangle corresponding to the positive slope line of the diagonal connection within the rectangle are the positions of the antenna. When the sum is even, the two vertices of the rectangle corresponding to the negative slope line of the diagonal connection within the rectangle are the positions of the antenna.

[0032] Furthermore, based on the central antenna, the positions of other antennas in the beam subarray used to simulate the scattered signal of the scattering region are determined, including:

[0033] When the position of the center antenna of the beam subarray is determined according to step S2, Based on the antenna distribution, the coordinates and numbers of the remaining 6 antennas of the beam subarray are determined as follows:

[0034] The coordinates of the upper right antenna are

[0035] The coordinates of the upper left antenna are

[0036] The coordinates of the left and center antennas are

[0037] The coordinates of the lower left antenna are

[0038] The coordinates of the lower right antenna are

[0039] The coordinates of the right center antenna are

[0040] The coordinates of the seven antennas are used to determine the correspondence between the antennas and the switch control codes in the digital triplet array, and the corresponding switch links are selected to achieve coarse position control of the scattering region.

[0041] Furthermore, determining the location of the scattering point within the radar beam array includes:

[0042] 1) Calculate the scattering points within the radar beam range Relative angles with each antenna of the beam subarray These are the numbers of the seven antennas within the beam subarray;

[0043] 2) Take relative angles square root Arrange them in ascending order, select the antenna array elements corresponding to the first 3 values ​​of the sequence, and record the corresponding n values ​​n1, n2, n3;

[0044] 3) According to Heron's formula, calculate the area of ​​the three triangles formed by the scattering point M and the three selected antenna elements in turn, and determine whether the sum of the areas of the three triangles is equal to the area of ​​the triangle formed by the three antenna elements; if yes, then determine that the scattering point M is located in the region formed by these three antenna elements.

[0045] Furthermore, the precise angle control of each scattering point within the beam subarray adjusts the amplitude (E) of the three branches in the digital triplet formed by the three antenna elements. n1 E n2 E n3 )for:

[0046]

[0047] Where, θ, These are the azimuth and elevation angles of the scattering point, θ. n1 , These are the azimuth and elevation angles of antenna element n1, respectively, E n1 θ is the amplitude of antenna element n1; n2 , These are the azimuth and elevation angles of antenna element n2, respectively, E n2 θ is the amplitude of antenna element n2; n3 , These are the azimuth and elevation angles of antenna element n3, respectively, En3 Let n be the amplitude of antenna element n3.

[0048] This invention can achieve one of the following beneficial effects:

[0049] The digital triplet amplitude and phase control method disclosed in this invention, applicable to regional simulation, achieves refined reconstruction of echoes from multiple sources under radar perspective; and adapts to the construction of the three-dimensional scattering center target and interference signal spatial transmission link inner field of broadband radar detection system, can efficiently reconstruct the regional electromagnetic scattering effect under radar detection scenario, and solve the problem of refined spatial reconstruction of echoes from multiple sources under radar perspective. Attached Figure Description

[0050] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0051] Figure 1 This is a flowchart of a digital triplet amplitude and phase control method applicable to regional simulation in an embodiment of the present invention;

[0052] Figure 2 This is a schematic diagram of the antenna array for spatial reconstruction of the scattered signal in an embodiment of the present invention;

[0053] Figure 3 This is a schematic diagram illustrating the determination of the antenna position during the coarse position control process in an embodiment of the present invention. Detailed Implementation

[0054] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0055] One embodiment of the present invention discloses a digital triplet amplitude and phase control method suitable for regional simulation, such as... Figure 1 As shown, it includes the following steps:

[0056] Step S1: Based on the location information of all scattering points within the radar beam coverage area in the current simulation scenario, calculate the location of the center point of the scattering region formed by the scattering points.

[0057] Step S2: In the antenna array used for spatial reconstruction of the scattered signal, a central antenna is matched for the center point position of the scattering region;

[0058] Step S3: Determine the positions of other antennas in the beam subarray used to reconstruct the scattered signal of the scattering region based on the central antenna; thus achieving coarse position control of the scattering region.

[0059] Step S4: Based on the position of each scattering point within the beam subarray, determine the digital triplet within the beam subarray used to simulate the signal angle of that scattering point; adjust the amplitude of each branch of the antenna in the digital domain for the digital triplet; achieve fine angle control of each scattering point within the beam subarray, and reconstruct the scattering signal.

[0060] Specifically, such as Figure 2 As shown, in the antenna array used for spatial reconstruction of scattered signals, in two adjacent rows of antennas, one antenna in any row and two adjacent antennas in the other row form an equilateral triangle, which is a digital triplet. The amplitude of each antenna branch of the digital triplet is controlled in the digital domain to reconstruct a simulated scattered signal.

[0061] More specifically, when constructing the scattered echo within the radar beam coverage area, one antenna in the antenna array is designated as the central antenna of the scattering region; this central antenna and the six surrounding adjacent antennas are combined to form an antenna group; this serves as the beam subarray for constructing the scattered echo within the radar beam coverage area.

[0062] Specifically, in step S1, the center point of the scattering region formed by the scattering points is determined.

[0063] The location information of the i-th scattering point within the radar beam coverage area in the current simulation scenario includes the azimuth angle θ. i and pitch angle m is the number of scattering points;

[0064] At the center point of the scattering region,

[0065] Azimuth of the center point

[0066] Pitch angle at center point

[0067] Where, θ max =max{θ1,…,θ i ,…,θ m}, θ min =min{θ1,…,θ i ,…,θ m},

[0068] Specifically, step S2 includes:

[0069] 1) Connect all the antennas in the antenna array area with lines to divide the array area into multiple triangular frames. The two vertices of the hypotenuse of the triangular frame are the positions of two adjacent antennas. Two triangular frames occupying the same two identical antennas form a rectangular frame. Then, number the rows and columns of the rectangular frames.

[0070] 2) Determine the row and column numbers of the rectangle containing the center point based on the coordinates of the center point of the scattering region; the rectangle containing the center point includes:

[0071] (1) The coordinates of the center point of the scattering region are normalized using the array angle interval;

[0072] The normalization formula is:

[0073] θ0 / θ * =int(θ0 / θ) * ) + fraction (θ0 / θ * )

[0074]

[0075] `int()` is the integer function; for positive numbers, it selects the largest integer not greater than the normalized value; for negative numbers, it selects the smallest integer not less than the normalized value. `fraction()` is the proper fraction function, used to obtain the proper fraction remaining after the integer function `int()` has rounded down. Array azimuth spacing. Pitch spacing is ω is the angular spacing between adjacent antennas in the antenna array;

[0076] (2) Set int(θ0 / θ) * ), The value serves as the row and column number of the rectangle containing the center point of the scattering region.

[0077] 3) Determine the position coordinates of the two antennas within the rectangle containing the center point;

[0078] Determine the position coordinates of the two antennas within the rectangle containing the center point; including:

[0079] Add the row and column numbers of the rectangle containing the center point of the scattering region. When the sum is odd, the two vertices of the rectangle corresponding to the positive slope line of the diagonal connection within the rectangle are the positions of the antenna. When the sum is even, the two vertices of the rectangle corresponding to the negative slope line of the diagonal connection within the rectangle are the positions of the antenna.

[0080] like Figure 3 As shown, when the rectangle has 2 rows and 1 column, the sum of the row and column numbers is odd. Therefore, in the rectangle with 2 rows and 1 column, there are two antenna elements at the two vertices of the diagonal with a positive slope. When the rectangle has 2 rows and 2 columns, the sum of the row and column numbers is even. Therefore, in the rectangle with 2 rows and 2 columns, there are two antenna elements at the two vertices of the diagonal with a negative slope.

[0081] 4) Calculate the distance between the center point coordinates of the scattering region and the position coordinates of the two antennas; select the antenna with the closest distance as the center antenna of the beam subarray.

[0082] The distance between the two coordinate points is the Euclidean distance, which can be obtained using existing methods.

[0083] In step S3, the positions of other antennas in the beam subarray used to reconstruct the scattered signal of the scattering region are determined based on the central antenna, including:

[0084] When the position of the center antenna of the beam subarray is determined according to step S2, Based on the antenna distribution, the coordinates and numbers of the remaining 6 antennas of the beam subarray are determined as follows:

[0085] The coordinates of the upper right antenna are

[0086] The coordinates of the upper left antenna are

[0087] The coordinates of the left and center antennas are

[0088] The coordinates of the lower left antenna are

[0089] The coordinates of the lower right antenna are

[0090] The coordinates of the right center antenna are

[0091] The coordinates of the seven antennas are used to determine the correspondence between the antennas and the switch control codes in the digital triplet array, and the corresponding switch links are selected to achieve coarse position control of the scattering region.

[0092] Specifically, in step S4, determining the position of the scattering point within the radar beam array includes:

[0093] 1) Calculate the scattering points within the radar beam range Relative angles with each antenna of the beam subarray These are the numbers of the seven antennas within the beam subarray;

[0094] 2) Take relative angles square root Arrange them in ascending order, select the antenna array elements corresponding to the first 3 values ​​of the sequence, and record the corresponding n values ​​n1, n2, n3;

[0095] 3) According to Heron's formula, calculate the area of ​​the three triangles formed by the scattering point M and the three selected antenna elements in turn; determine whether the sum of the areas of the three triangles is equal to the area of ​​the triangle formed by the three antenna elements; if yes, then determine that the scattering point M is located in the region formed by these three antenna elements.

[0096] More specifically, the precise angle control of the scattering point M within the beam subarray adjusts the amplitude (E) of the three branches in the digital triplet formed by the three antenna elements. n1 E n2 E n3 )for:

[0097]

[0098] Where, θ, These are the azimuth and elevation angles of the scattering point, θ. n1 , These are the azimuth and elevation angles of antenna element n1, respectively, E n1 θ is the amplitude of antenna element n1; n2 , These are the azimuth and elevation angles of antenna element n2, respectively, E n2 θ is the amplitude of antenna element n2; n3 , These are the azimuth and elevation angles of antenna element n3, respectively, E n3 Let n be the amplitude of antenna element n3.

[0099] By adjusting the amplitudes of antenna array elements n1, n2, and n3 branches to E n1 E n2 E n3 It enables precise angle control of the scattering point M within the beam subarray, and reconstructs the scattering signal of the scattering point M.

[0100] By precisely controlling the angles of all scattering points within the scattering area, including targets and interference, the spatial transmission link inner field of the broadband radar detection system, including the three-dimensional scattering center target and interference signals, was constructed.

[0101] In summary, the digital triplet amplitude and phase control method applicable to regional simulation in this embodiment of the invention achieves refined reconstruction of multi-source scene echoes from a radar perspective; and adapts to the construction of the three-dimensional scattering center target and the spatial transmission link inner field of interference signals in a broadband radar detection system, which can efficiently reconstruct the regional electromagnetic scattering effect in a radar detection scenario and solve the problem of refined reconstruction of multi-source scene echoes from a radar perspective.

[0102] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A digital triplet amplitude-phase control method suitable for regional simulation, characterized in that, include: Step S1: Based on the location information of all scattering points within the radar beam coverage area in the current simulation scenario, calculate the location of the center point of the scattering region formed by the scattering points. Step S2: In the antenna array used for spatial reconstruction of the scattered signal, a central antenna is matched for the center point position of the scattering region; Step S3: Determine the positions of other antennas in the beam subarray used to reconstruct the scattered signal of the scattering region based on the central antenna; To achieve coarse position control of the scattering region; Step S4: Based on the position of each scattering point within the beam subarray, determine the digital triplet within the beam subarray used to simulate the signal angle of that scattering point; adjust the amplitude of each branch of the antenna in the digital domain for the digital triplet; achieve fine angle control of each scattering point within the beam subarray, and reconstruct the scattering signal. When constructing the scattered echo within the radar beam coverage area, one antenna in the antenna array is designated as the central antenna of the scattering region; this central antenna and the six surrounding adjacent antennas are combined to form an antenna group; this serves as the beam subarray for constructing the scattered echo within the radar beam coverage area. The radar beam coverage area in the current simulation scenario includes the first i The location information of the scattering point includes the azimuth angle. and pitch angle , i= 1,…, m ; m The number of scattering points; At the center point of the scattering region, Azimuth of the center point ; Pitch angle at center point ; in, , , , ; Determining the location of the scattering point within the radar beam array includes: 1) Calculate the scattering point M within the radar beam range. Relative angles with each antenna of the beam subarray n=0,1,2,…,6 are the numbers of the 7 antennas in the beam subarray; 2) Take relative angles square root Arrange the values ​​in ascending order, select the antenna elements corresponding to the first three values ​​of the sequence, and record the corresponding values. n value , , ; 3) According to Heron's formula, calculate the area of ​​the three triangles formed by the scattering point M and the three selected antenna elements in turn, and determine whether the sum of the areas of the three triangles is equal to the area of ​​the triangle formed by the three antenna elements; if yes, then determine that the scattering point M is located in the region formed by these three antenna elements.

2. The digital triplet amplitude and phase control method for regional simulation according to claim 1, characterized in that, In an antenna array used for spatial reconstruction of a scattered signal, one antenna in any row and two adjacent antennas in the other row form an equilateral triangle, which is a digital triplet. The amplitude of each antenna branch of the digital triplet is controlled in the digital domain to reconstruct a simulated scattered signal.

3. The digital triplet amplitude and phase control method applicable to regional simulation according to claim 1, characterized in that, Step S2 includes: 1) Connect all the antennas in the antenna array area with lines to divide the array area into multiple triangular frames. The two vertices of the hypotenuse of the triangular frame are the positions of two adjacent antennas. Two triangular frames occupying the same two antennas form a rectangle. Then, number the rows and columns of the rectangles. 2) Determine the row and column numbers of the rectangle containing the center point based on the coordinates of the center point of the scattering area; 3) Determine the position coordinates of the two antennas within the rectangle containing the center point; 4) Calculate the distance between the center point coordinates of the scattering region and the position coordinates of the two antennas; select the antenna with the closest distance as the center antenna of the beam subarray.

4. The digital triplet amplitude and phase control method for regional simulation according to claim 3, characterized in that, The rectangle containing the center point is determined based on the coordinates of the center point of the scattering region, including: (1) The coordinates of the center point of the scattering region are normalized using the array angle interval; The normalization formula is: For the floor function, for positive numbers, select the largest integer not greater than the normalized value; for negative numbers, select the smallest integer not less than the normalized value; array azimuth spacing. The pitch spacing is ; This refers to the angular spacing between adjacent antennas in an antenna array. (2) , The value serves as the row and column number of the rectangle containing the center point of the scattering region.

5. The digital triplet amplitude and phase control method for regional simulation according to claim 4, characterized in that, Determine the position coordinates of the two antennas within the rectangle containing the center point; including: Add the row and column numbers of the rectangle containing the center point of the scattering region. When the sum is odd, the two vertices of the rectangle corresponding to the positive slope line of the diagonal connection within the rectangle are the positions of the antenna. When the sum is even, the two vertices of the rectangle corresponding to the negative slope line of the diagonal connection within the rectangle are the positions of the antenna.

6. The digital triplet amplitude and phase control method for regional simulation according to claim 5, characterized in that, The positions of other antennas in the beam subarray used to simulate the scattered signal of the scattering region are determined based on the central antenna, including: When the position of the center antenna of the beam subarray is determined to be P0 according to step S2, , Based on the antenna distribution, the coordinates and numbers of the remaining 6 antennas of the beam subarray are determined as follows: The coordinates of the upper right antenna are P1 ; The coordinates of the upper left antenna are P2 ; The coordinates of the left-center antenna are P3. ; The coordinates of the lower left antenna are P4. ; The lower right antenna is located at coordinate P5. ; The coordinates of the right center antenna are P6. ; The correspondence between antennas and switch control codes in the digital triplet array is determined by the coordinates of the seven antennas, and the corresponding switch links are selected to achieve coarse position control of the scattering region.

7. The digital triplet amplitude and phase control method applicable to regional simulation according to claim 1, characterized in that, The precise angle control of each scattering point within the beam subarray adjusts the amplitude of the three branches in the digital triplet formed by the three antenna elements. )for: ； in, These are the azimuth and elevation angles of the scattering point, respectively. , Antenna elements azimuth and elevation angles Antenna array element The amplitude; , Antenna elements azimuth and elevation angles Antenna array element The amplitude; , Antenna elements azimuth and elevation angles Antenna array element The amplitude.

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