Subarray-level finite phase interval initial phase compensation method, system, medium and device

Abstract

This invention belongs to the field of radar, and particularly relates to a method, system, medium, and device for initial phase compensation in a finite phase interval at the subarray level. The method includes: Step 1, acquiring the initial phase data of each antenna subarray in the radar array; Step 2, sequentially performing curve fitting on the initial phase data of each row of antenna subarrays to obtain a first compensation value for the initial phase data of each row of antenna subarrays; Step 3, sequentially performing curve fitting on the initial phase data of each column of antenna subarrays to obtain a second compensation value for the initial phase data of each column of antenna subarrays; Step 4, compensating the initial phase data of each antenna subarray based on the first compensation value and the second compensation value. This invention can eliminate the linear phase present in the array, reduce the phase compensation requirements of the phase shifter / digital transceiver components, reduce data processing volume, and improve compensation efficiency.

Description

Technical Field

[0001] This invention belongs to the field of radar, and particularly relates to a method, system, medium and device for initial phase compensation in a finite phase interval at the subarray level. Background Technology

[0002] Phased array antennas achieve beam scanning by controlling the phase of each channel. However, when the initial phase of the signal radiated by each element is inconsistent at the array surface, it will affect the first sidelobe level and the difference null depth of the antenna pattern, thus reducing the radar's effectiveness.

[0003] Phase inconsistency mainly stems from manufacturing errors in components, array assembly errors, and environmental factors. Therefore, phased array antennas require initial phase acquisition during pre-shipment testing, and phase compensation is performed by controlling phase shifter components or digital transceiver components to ensure phase consistency across all elements.

[0004] When the antenna array is large, the amount of data for initial phase compensation at the unit level is extremely large. In addition, the initial phase at different locations on the array may differ significantly, with values ​​ranging from 0 to 360 degrees. However, for certain phased array antennas with specific phase shift control systems, only 90 degrees of phase can be compensated, making complete compensation impossible. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method, system, medium and device for initial phase compensation in a finite phase interval at the subarray level.

[0006] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A method for initial phase compensation in a finite phase interval at the subarray level, comprising:

[0007] Step 1: Obtain the initial phase data for each antenna subarray in the radar array;

[0008] Step 2: Perform curve fitting on the initial phase data of each row of antenna subarrays in sequence to obtain the first compensation value of the initial phase data of each row of antenna subarrays.

[0009] Step 3: Perform curve fitting on the initial phase data of each antenna subarray in sequence to obtain the second compensation value of the initial phase data of each antenna subarray.

[0010] Step 4: Compensate the initial phase data of each antenna subarray based on the first compensation value and the second compensation value.

[0011] The beneficial effects of this invention are: the sidelobe level and difference zero depth of the radiation pattern can be effectively improved through subarray-level phase compensation; the linear phase present in the array surface is eliminated, reducing the requirements for phase compensation of the phase shifter / digital transceiver components; and the amount of data processing is effectively reduced and the compensation efficiency is improved by extracting subarray-level phase data and performing compensation.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the acquisition of the initial phase data of each antenna subarray in the radar array includes: acquiring the initial phase of the phased array antenna through a near-field testing system, and obtaining the initial phase data of each antenna subarray based on the initial phase.

[0014] Furthermore, the first compensation value is expressed by the first formula:

[0015] The first formula is:

[0016] φ py =k p y+b p , where φ py k is the first compensation value for the phase of the subarray in row p and column y. p Let y be the slope of the curve fitted based on the phase data of row p, y be the column coordinates of the subarray, and b be the slope of the curve fitted based on the phase data of row p. p The intercept of the curve fitted based on the phase data of the p-th row.

[0017] Furthermore, the second compensation value is expressed by the second formula:

[0018] The second formula is:

[0019] φ qy =k q y+b q , where φ qy k is the second compensation value for the phase of the subarray in the x-th row of the q-th column. q Let x be the slope of the curve fitted based on the phase data of the q-th column, and let b be the row coordinate of the subarray. q The intercept of the curve fitted based on the phase data of column q.

[0020] Furthermore, it also includes:

[0021] Step 5: Obtain the minimum value among all the initial phase data of the antenna subarrays, subtract the minimum value from the initial phase data of each antenna subarray, and complete the secondary compensation of the initial phase data of the antenna subarrays.

[0022] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: A subarray-level finite phase interval initial phase compensation system, comprising:

[0023] The acquisition module is used to: acquire the initial phase data of each antenna subarray in the radar array;

[0024] The first calculation module is used to: sequentially perform curve fitting on the initial phase data of each row of antenna subarrays to obtain the first compensation value of the initial phase data of each row of antenna subarrays;

[0025] The second calculation module is used to: sequentially perform curve fitting on the initial phase data of each column of antenna subarrays to obtain the second compensation value of the initial phase data of each column of antenna subarrays;

[0026] The compensation module is used to compensate the initial phase data of each antenna subarray based on the first compensation value and the second compensation value.

[0027] The beneficial effects of this invention are: the sidelobe level and difference zero depth of the radiation pattern can be effectively improved through subarray-level phase compensation; the linear phase present in the array surface is eliminated, reducing the requirements for phase compensation of the phase shifter / digital transceiver components; and the amount of data processing is effectively reduced and the compensation efficiency is improved by extracting subarray-level phase data and performing compensation.

[0028] Furthermore, the acquisition of the initial phase data of each antenna subarray in the radar array includes: acquiring the initial phase of the phased array antenna through a near-field testing system, and obtaining the initial phase data of each antenna subarray based on the initial phase.

[0029] Furthermore, the first compensation value is expressed by the first formula:

[0030] The first formula is:

[0031] φ py =k p y+b p , where φ py k is the first compensation value for the phase of the subarray in row p and column y. p Let y be the slope of the curve fitted based on the phase data of row p, y be the column coordinates of the subarray, and b be the slope of the curve fitted based on the phase data of row p. p The intercept of the curve fitted based on the phase data of the p-th row.

[0032] Furthermore, the second compensation value is expressed by the second formula:

[0033] The second formula is:

[0034] φ qy =k q y+b q , where φ qy k is the second compensation value for the phase of the subarray in the x-th row of the q-th column. q Let x be the slope of the curve fitted based on the phase data of the q-th column, and let b be the row coordinate of the subarray. q The intercept of the curve fitted based on the phase data of column q.

[0035] Furthermore, the optimization compensation module is used to: obtain the minimum value among the initial phase data of all antenna subarrays, subtract the minimum value from the initial phase data of each antenna subarray, and complete the secondary compensation of the initial phase data of the antenna subarray.

[0036] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: a storage medium storing instructions, wherein when a computer reads the instructions, the computer executes the method described in any of the above-mentioned methods.

[0037] The beneficial effects of this invention are: the sidelobe level and difference zero depth of the radiation pattern can be effectively improved through subarray-level phase compensation; the linear phase present in the array surface is eliminated, reducing the requirements for phase compensation of the phase shifter / digital transceiver components; and the amount of data processing is effectively reduced and the compensation efficiency is improved by extracting subarray-level phase data and performing compensation.

[0038] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: an electronic device, including the above-mentioned storage medium and a processor that executes the instructions in the above-mentioned storage medium.

[0039] The beneficial effects of this invention are: the sidelobe level and difference zero depth of the radiation pattern can be effectively improved through subarray-level phase compensation; the linear phase present in the array surface is eliminated, reducing the requirements for phase compensation of the phase shifter / digital transceiver components; and the amount of data processing is effectively reduced and the compensation efficiency is improved by extracting subarray-level phase data and performing compensation. Attached Figure Description

[0040] Figure 1 This is a flowchart illustrating an embodiment of the initial phase compensation method for a finite phase interval at the subarray level according to the present invention.

[0041] Figure 2 This is a structural framework diagram of an embodiment of a subarray-level finite phase interval initial phase compensation system of the present invention;

[0042] Figure 3 This is a diagram showing the distribution of antenna array subarrays in an embodiment of the finite phase interval initial phase compensation method for subarray level according to the present invention. Detailed Implementation

[0043] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0044] like Figure 1 As shown, a method for initial phase compensation in a finite phase interval at the subarray level includes:

[0045] Step 1: Obtain the initial phase data for each antenna subarray in the radar array;

[0046] Step 2: Perform curve fitting on the initial phase data of each row of antenna subarrays in sequence to obtain the first compensation value of the initial phase data of each row of antenna subarrays.

[0047] Step 3: Perform curve fitting on the initial phase data of each antenna subarray in sequence to obtain the second compensation value of the initial phase data of each antenna subarray.

[0048] Step 4: Compensate the initial phase data of each antenna subarray based on the first compensation value and the second compensation value.

[0049] In some possible implementations, subarray-level phase compensation can effectively improve the sidelobe level and difference zero depth of the radiation pattern; eliminate the linear phase present in the array surface, reducing the phase compensation requirements of the phase shifter / digital transceiver components; and effectively reduce the amount of data processing and improve compensation efficiency by extracting and compensating the subarray-level phase data.

[0050] It should be noted that for step 1, which involves obtaining the initial phase data of each antenna element in each antenna subarray, the specific process can be found in the following content for further understanding:

[0051] The initial phase of the phased array antenna is acquired using a near-field testing system (mainly used to sample the near-field amplitude and phase of the test antenna, and can calculate the far-field radiation pattern) to obtain the initial phase data of the array surface.

[0052] The initial phase data is extracted from each antenna subarray and averaged to obtain the average initial phase data for each subarray level. An antenna subarray can be understood as each subarray containing x rows and y columns of antenna elements; the specific specifications mainly depend on the size of the array.

[0053] Assuming the antenna contains a total of 256 elements, and each subarray contains 8 rows and 4 columns of 32 elements, the antenna is divided into a total of 256 / 32 = 8 subarrays.

[0054] Step 2, performing curve fitting on each row of initial phase data in each antenna subarray to obtain the first compensation value for each row of initial phase data, can be understood by referring to the following content:

[0055] Take the initial phase data of the p-th subarray level Perform curve fitting on it. The fitting function can be written as: Where y represents its column coordinate. This represents the phase at that position. Extensive data analysis has revealed that in many cases, the coefficients of higher-order terms such as quadratic and cubic terms are very small, and their influence is usually negligible. Therefore, the relationship between the initial phase of the p-th row subarray and its position can be simplified to a linear fitting relationship, expressed as: Following the above calculation method, initial phase compensation is performed on the subarray row by row, with the compensation value being... This removes the linear phase between subarrays.

[0056] Step 3 involves performing curve fitting on each column of initial phase data in each antenna subarray to obtain the second compensation value for each column of initial phase data. The specific process can be understood by referring to the following content:

[0057] Take the initial phase data of the qth subarray level The fitting function for this data can be written as: Where x represents its row coordinate. This represents the phase at that position. Similar to row data fitting, the coefficients of the quadratic and cubic terms are very small, and their influence is usually negligible. Therefore, the initial phase relationship between the rows of the q-th subarray can be simplified to a linear fitting relationship, expressed as:

[0058] Following the above calculation method, initial phase compensation is performed on the subarray column by column, with the compensation value being... This removes the linear phase between rows of the subarray.

[0059] Further processing can be performed as follows: Find the minimum value in the initial phase data of the subarray level. Using this as the reference phase, subtract the phase value of each subarray. This refers to the initial phase value that the phase shifter or digital transceiver component needs to compensate for. Based on the above calculations, the phase value that each subarray needs to compensate for is typically concentrated between 0 and 90 degrees, which places relatively simple requirements on the phase control system and makes it easy to implement.

[0060] Preferably, in any of the above embodiments, obtaining the initial phase data of each antenna subarray in the radar array includes: acquiring the initial phase of the phased array antenna through a near-field testing system, and obtaining the initial phase data of each antenna subarray based on the initial phase.

[0061] Preferably, in any of the above embodiments, the first compensation value is expressed by a first formula:

[0062] The first formula is:

[0063] φ py =k p y+b p , where φ py k is the first compensation value for the phase of the subarray in row p and column y. p Let y be the slope of the curve fitted based on the phase data of row p, y be the column coordinates of the subarray, and b be the slope of the curve fitted based on the phase data of row p. p The intercept of the curve fitted based on the phase data of the p-th row.

[0064] Preferably, in any of the above embodiments, the second compensation value is expressed by a second formula:

[0065] The second formula is:

[0066] φ qy =k q y+b q , where φ qyk is the second compensation value for the phase of the subarray in the x-th row of the q-th column. q Let x be the slope of the curve fitted based on the phase data of the q-th column, and let b be the row coordinate of the subarray. q The intercept of the curve fitted based on the phase data of column q.

[0067] Preferably, in any of the above embodiments, it further includes:

[0068] Step 5: Obtain the minimum value among all the initial phase data of the antenna subarrays, subtract the minimum value from the initial phase data of each antenna subarray, and complete the secondary compensation of the initial phase data of the antenna subarrays.

[0069] like Figure 2 As shown, a subarray-level finite phase interval initial phase compensation system includes:

[0070] The acquisition module 100 is used to: acquire the initial phase data of each antenna subarray in the radar array;

[0071] The first calculation module 200 is used to: sequentially perform curve fitting on the initial phase data of each row of antenna subarrays to obtain the first compensation value of the initial phase data of each row of antenna subarrays;

[0072] The second calculation module 300 is used to: sequentially perform curve fitting on the initial phase data of each column of antenna subarrays to obtain the second compensation value of the initial phase data of each column of antenna subarrays;

[0073] The compensation module 400 is used to compensate the initial phase data of each antenna subarray based on the first compensation value and the second compensation value.

[0074] In some possible implementations, subarray-level phase compensation can effectively improve the sidelobe level and difference zero depth of the radiation pattern; eliminate the linear phase present in the array surface, reducing the phase compensation requirements of the phase shifter / digital transceiver components; and effectively reduce the amount of data processing and improve compensation efficiency by extracting and compensating the subarray-level phase data.

[0075] Preferably, in any of the above embodiments, obtaining the initial phase data of each antenna subarray in the radar array includes: acquiring the initial phase of the phased array antenna through a near-field testing system, and obtaining the initial phase data of each antenna subarray based on the initial phase.

[0076] Preferably, in any of the above embodiments, the first compensation value is expressed by a first formula:

[0077] The first formula is:

[0078] φ py =k p y+b p , where φ py k is the first compensation value for the phase of the subarray in row p and column y.p Let y be the slope of the curve fitted based on the phase data of row p, y be the column coordinates of the subarray, and b be the slope of the curve fitted based on the phase data of row p. p The intercept of the curve fitted based on the phase data of the p-th row.

[0079] Preferably, the second compensation value is expressed by a second formula:

[0080] The second formula is:

[0081] φ qy =k q y+b q , where φ qy k is the second compensation value for the phase of the subarray in the x-th row of the q-th column. q Let x be the slope of the curve fitted based on the phase data of the q-th column, and let b be the row coordinate of the subarray. q The intercept of the curve fitted based on the phase data of column q.

[0082] Preferably, in any of the above embodiments, the optimization compensation module is used to: obtain the minimum value among all the initial phase data of the antenna subarrays, subtract the minimum value from the initial phase data of each antenna subarray, and complete the secondary compensation of the initial phase data of the antenna subarrays.

[0083] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: a storage medium storing instructions, wherein when a computer reads the instructions, the computer executes the method described in any of the above-mentioned methods.

[0084] In some possible implementations, subarray-level phase compensation can effectively improve the sidelobe level and difference zero depth of the radiation pattern; eliminate the linear phase present in the array surface, reducing the phase compensation requirements of the phase shifter / digital transceiver components; and effectively reduce the amount of data processing and improve compensation efficiency by extracting and compensating the subarray-level phase data.

[0085] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: an electronic device, including the above-mentioned storage medium and a processor that executes the instructions in the above-mentioned storage medium.

[0086] In some possible implementations, subarray-level phase compensation can effectively improve the sidelobe level and difference zero depth of the radiation pattern; eliminate the linear phase present in the array surface, reducing the phase compensation requirements of the phase shifter / digital transceiver components; and effectively reduce the amount of data processing and improve compensation efficiency by extracting and compensating the subarray-level phase data.

[0087] Readers should understand that in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0088] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the method embodiments described above are merely illustrative. For instance, the division of steps is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple steps may be combined or integrated into another step, or some features may be ignored or not executed.

[0089] If the above methods are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or 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 of the various embodiments of this 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.

[0090] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for initial phase compensation in a finite phase interval at the subarray level, characterized in that, include: Step 1: Obtain the initial phase data for each antenna subarray in the radar array; Step 2: Perform curve fitting on the initial phase data of each row of antenna subarrays in sequence to obtain the first compensation value of the initial phase data of each row of antenna subarrays. Step 3: Perform curve fitting on the initial phase data of each antenna subarray in sequence to obtain the second compensation value of the initial phase data of each antenna subarray. Step 4: Compensate the initial phase data of each antenna subarray based on the first compensation value and the second compensation value; Also includes: Step 5: Obtain the minimum value among all the initial phase data of the antenna subarrays, subtract the minimum value from the initial phase data of each antenna subarray, and complete the secondary compensation of the initial phase data of the antenna subarrays.

2. The initial phase compensation method for a finite phase interval at the subarray level according to claim 1, characterized in that, The acquisition of the initial phase data of each antenna subarray in the radar array includes: acquiring the initial phase of the phased array antenna through a near-field testing system, and obtaining the initial phase data of each antenna subarray based on the initial phase.

3. The initial phase compensation method for a finite phase interval at the subarray level according to claim 1, characterized in that, The first compensation value is expressed by the first formula: The first formula is: =k p y+b p ,in, This is the first compensation value for the phase of the subarray in the p-th row and y-th column. Let y be the slope of the curve fitted based on the phase data of row p, and y be the column coordinates of the subarray. The intercept of the curve fitted based on the phase data of the p-th row.

4. The initial phase compensation method for a finite phase interval at the subarray level according to claim 1, characterized in that, The second compensation value is expressed by the second formula: The second formula is: =k q y+b q ,in, k is the second compensation value for the phase of the subarray in the x-th row of the q-th column. q Let x be the slope of the curve fitted based on the phase data of the q-th column, and let x be the row coordinate of the subarray. The intercept of the curve fitted based on the phase data of column q.

5. The initial phase compensation method for a finite phase interval at the subarray level according to claim 1, characterized in that, Step 1 also includes: The initial phase data of the antenna elements in any antenna subarray are averaged to obtain the average value corresponding to that antenna subarray, and the average value is used as the initial phase data of that antenna subarray.

6. A subarray-level finite phase interval initial phase compensation system, employing the subarray-level finite phase interval initial phase compensation method as described in claim 1, characterized in that, include: The acquisition module is used to: acquire the initial phase data of each antenna subarray in the radar array; The first calculation module is used to: sequentially perform curve fitting on the initial phase data of each row of antenna subarrays to obtain the first compensation value of the initial phase data of each row of antenna subarrays; The second calculation module is used to: sequentially perform curve fitting on the initial phase data of each column of antenna subarrays to obtain the second compensation value of the initial phase data of each column of antenna subarrays; The compensation module is used to compensate the initial phase data of each antenna subarray based on the first compensation value and the second compensation value.

7. The initial phase compensation system for a subarray-level finite phase interval according to claim 6, characterized in that, The acquisition of the initial phase data of each antenna subarray in the radar array includes: acquiring the initial phase of the phased array antenna through a near-field testing system, and obtaining the initial phase data of each antenna subarray based on the initial phase.

8. A storage medium, characterized in that, The medium stores instructions that, when read by a computer, cause the computer to execute the method as described in any one of claims 1 to 5.

9. An electronic device, characterized in that, Includes the storage medium of claim 8 and a processor that executes instructions within the storage medium.

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