An antenna angle of arrival (AOA) acquisition method and apparatus

Abstract

The application relates to an antenna angle of arrival (AOA) acquisition method and device, which comprises a table writing process and a table searching process. The table writing process comprises the following steps: S11, adjusting a first AOA angle of a measured antenna relative to a receiving antenna to obtain corresponding first and second PDOAs; S12, adjusting a second AOA angle of the measured antenna relative to the receiving antenna to obtain corresponding first and second PDOAs; S13, establishing a data value matrix of the first PDOA, the second PDOA, the first AOA angle and the second AOA angle to obtain a two-dimensional grid relationship chart of the first AOA angle, the second AOA angle, the first PDOA and the second PDOA as a target chart; the table searching process comprises the following steps: S21, obtaining first and second measured PDOAs of the measured antenna; S22, obtaining a corresponding target grid from the target chart based on the first and second measured PDOAs; and S23, obtaining first and second AOA angles corresponding to the target grid as measured AOA angles of the measured antenna. The application can improve the accuracy of antenna AOA acquisition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antenna calibration, in particular to an antenna angle of arrival (AOA) acquisition method and device. BACKGROUND

[0002] In the current antenna calibration process, the antenna angle of arrival (AOA) is usually calculated based on the following theoretical formula,

[0003]

[0004] wherein, wherein λ is the wavelength, d is the distance between the test antennas. PDOA is the antenna signal phase difference of arrival.

[0005] However, in actual applications, the design differences caused by antenna design, such as mutual coupling between antenna elements, non-uniform antenna pattern with obvious concave, large fluctuation of antenna group delay, or phase center error of antenna, etc. will cause the actual PDOA and AOA relationship to be quite different from the formula description, which will cause the angle estimation of UWB antenna AOA / PDOA to be often deviated, and the result of directly using the theoretical formula to calculate the angle of arrival (AOA) is not accurate. SUMMARY

[0006] The technical problem to be solved by the present application is to provide an antenna angle of arrival (AOA) acquisition method and device.

[0007] The technical solution adopted by the present application to solve the technical problem is: constructing an antenna angle of arrival (AOA) acquisition method, including a table writing process and a table lookup process; wherein,

[0008] The table writing process includes:

[0009] S11, adjusting the first AOA angle of the measured antenna relative to the receiving antenna, obtaining the first PDOA and the second PDOA of the measured antenna relative to the receiving antenna corresponding to each first AOA angle, wherein the first AOA angle is the AOA angle corresponding to the measured antenna and the first reference plane, the first PDOA is the PDOA corresponding to the measured antenna and the first reference plane, and the second PDOA is the PDOA corresponding to the measured antenna and the second reference plane, and the second reference plane is perpendicular to the first reference plane;

[0010] S12, adjusting the second AOA angle of the measured antenna relative to the receiving antenna, obtaining the first PDOA and the second PDOA of the measured antenna relative to the receiving antenna corresponding to each second AOA angle, wherein the second AOA angle is the AOA angle corresponding to the measured antenna and the second reference plane.

[0011] S13, a data value matrix of the first PDOA, the second PDOA, the first AOA angle and the second AOA angle is established, so as to obtain a two-dimensional grid relationship chart of the first AOA angle, the second AOA angle, the first PDOA and the second PDOA as a target chart according to the data value matrix;

[0012] The table lookup process comprises:

[0013] S21, in the working process of the measured antenna, a first measured PDOA corresponding to the first reference plane and a second measured PDOA corresponding to the second reference plane of the measured antenna relative to the receiving antenna are acquired;

[0014] S22, a corresponding target grid is acquired from the target chart based on the first measured PDOA and the second measured PDOA;

[0015] S23, a corresponding first AOA angle and second AOA angle are acquired from the target grid as the measured AOA angle of the measured antenna.

[0016] Preferably, in the antenna angle of arrival (AOA) acquisition method, in the step S11, the first AOA angle of the measured antenna relative to the receiving antenna is adjusted, comprising: adjusting the rotation angle of the receiving antenna in the first reference plane in a first preset range according to a first preset step to adjust the first AOA angle.

[0017] Preferably, in the antenna angle of arrival (AOA) acquisition method, in the step S12, the second AOA angle of the measured antenna relative to the receiving antenna is adjusted, comprising: adjusting the rotation angle of the receiving antenna in the second reference plane in a second preset range according to a second preset step to adjust the second AOA angle.

[0018] Preferably, in the antenna angle of arrival (AOA) acquisition method, further comprising:

[0019] A two-dimensional grid relationship chart corresponding to each service channel of the receiving antenna is acquired respectively, so as to obtain a plurality of two-dimensional grid relationship charts;

[0020] The plurality of two-dimensional grid relationship charts are sorted according to the probability of overlapping grids in the plurality of two-dimensional grid relationship charts, so as to obtain a plurality of target charts and their corresponding priority orders.

[0021] Preferably, in the antenna angle of arrival (AOA) acquisition method, further comprising:

[0022] The target service channel is selected according to the priority order to perform the table lookup process.

[0023] Preferably, in the antenna angle of arrival (AOA) acquisition method, the steps of:

[0024] The maximum and minimum values of the first PDOA or the second PDOA of the overlapping grid in the two-dimensional grid relationship chart are obtained, and the maximum and minimum values are connected by a straight line to obtain a new grid, and the two-dimensional grid relationship chart is updated.

[0025] Preferably, in the antenna angle of arrival (AOA) acquisition method, in the step S22, the target grid corresponding to the first measured PDOA and the second measured PDOA is obtained from the target chart based on the first measured PDOA and the second measured PDOA; including: obtaining the target grid corresponding to the first measured PDOA and the second measured PDOA by a closed curve inside and outside judgment algorithm.

[0026] Preferably, in the antenna angle of arrival (AOA) acquisition method, in the step S23, the first AOA angle and the second AOA angle corresponding to the target grid are obtained, including:

[0027] The first AOA angle and the second AOA angle corresponding to the target grid are obtained by using an inverse distance weighting method.

[0028] Preferably, in the antenna angle of arrival (AOA) acquisition method, the first reference plane is a horizontal plane.

[0029] The application also constructs an antenna angle of arrival (AOA) acquisition device, including a table writing device and a table lookup device.

[0030] The table writing device includes:

[0031] The first acquisition unit is configured to adjust the first AOA angle of the measured antenna relative to the receiving antenna, and obtain the first PDOA and the second PDOA of the measured antenna relative to the receiving antenna corresponding to each first AOA angle, wherein the first AOA angle is the AOA angle of the measured antenna corresponding to the first reference plane, the first PDOA is the PDOA of the measured antenna corresponding to the first reference plane, and the second PDOA is the PDOA of the measured antenna corresponding to the second reference plane, and the second reference plane is perpendicular to the first reference plane.

[0032] a second acquisition unit, configured to adjust a second angle of arrival (AOA) of the measured antenna relative to the receiving antenna, and acquire the first PDOA and the second PDOA of the measured antenna relative to the receiving antenna corresponding to each of the second AOA angles, wherein the second AOA angle is an AOA angle corresponding to the measured antenna and the second reference plane;

[0033] a third acquisition unit, configured to establish a data value matrix of the first PDOA, the second PDOA, the first AOA angle and the second AOA angle, and obtain a two-dimensional grid relationship chart of the first AOA angle, the second AOA angle, the first PDOA and the second PDOA as a target chart according to the data value matrix;

[0034] The look-up table device comprises:

[0035] a fourth acquisition unit, configured to acquire a first measured PDOA corresponding to the first reference plane and a second measured PDOA corresponding to the second reference plane of the measured antenna relative to the receiving antenna during operation of the measured antenna;

[0036] a fifth acquisition unit, configured to acquire a corresponding target grid from the target chart based on the first measured PDOA and the second measured PDOA;

[0037] a sixth acquisition unit, configured to acquire a first AOA angle and a second AOA angle corresponding to the measured AOA angle of the measured antenna according to the target grid.

[0038] The antenna angle of arrival (AOA) acquisition method and device have the following beneficial effects: the accuracy of antenna AOA acquisition can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] The application will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0040] Figure 1 is a program flow chart of an embodiment of the antenna angle of arrival (AOA) acquisition method of the application;

[0041] Figure 2 is a program flow chart of another embodiment of the antenna angle of arrival (AOA) acquisition method of the application;

[0042] Figure 3 is a schematic diagram of a two-dimensional grid relationship chart in an embodiment of the antenna angle of arrival (AOA) acquisition method of the application;

[0043] Figure 4 is a schematic diagram of a two-dimensional grid relationship chart in another embodiment of the antenna angle of arrival (AOA) acquisition method of the application;

[0044] Figure 5 is a schematic diagram of inverse distance weighting method in an embodiment of the antenna angle of arrival (AOA) acquisition method of the present application;

[0045] Figure 6 is a logic block diagram of an embodiment of the antenna angle of arrival (AOA) acquisition device of the present application;

[0046] Figure 7 is a logic block diagram of another embodiment of the antenna angle of arrival (AOA) acquisition device of the present application;

[0047] Figure 8 is a PDOA and AOA data chart of an embodiment of the linear polarization antenna;

[0048] Figure 9 is Figure 8 is a schematic diagram of the corresponding two-dimensional grid relationship chart;

[0049] Figure 10 is a PDOA and AOA data chart of an embodiment of the circular polarization antenna;

[0050] Figure 11 is Figure 10 is a schematic diagram of the corresponding two-dimensional grid relationship chart. DETAILED DESCRIPTION

[0051] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0052] As Figure 1As shown, in the first embodiment of the antenna AOA acquisition method of the present application, the process includes a table writing process and a table lookup process; wherein the table writing process includes: S11, adjusting the first AOA angle of the measured antenna relative to the receiving antenna, obtaining the first PDOA and the second PDOA of the measured antenna relative to the receiving antenna corresponding to each first AOA angle, wherein the first AOA angle is the AOA angle of the measured antenna corresponding to the first reference plane, the first PDOA is the PDOA of the measured antenna corresponding to the first reference plane, and the second PDOA is the PDOA of the measured antenna corresponding to the second reference plane, and the second reference plane is perpendicular to the first reference plane. Specifically, the first AOA angle of the measured antenna corresponding to the first reference plane can be adjusted by adjusting the mechanical arm of the test antenna (i.e. the receiving antenna), and here the first reference plane can be understood as the horizontal direction or the vertical direction of the measured antenna. By adjusting the rotation angle of the measured antenna in the horizontal direction, the first AOA angle of the measured antenna relative to the test antenna can be obtained in fact, and the first PDOA and the second PDOA of the measured antenna relative to the test antenna can be obtained through the test antenna. The first PDOA can be understood as the PDOA of the measured antenna relative to the horizontal direction, and the second PDOA is the PDOA of the measured antenna relative to the vertical direction. It can be understood that each first AOA angle corresponds to a first PDOA and a second PDOA. It can be understood that the horizontal direction of the antenna and the vertical direction of the antenna are divided according to the general pattern of the antenna, and the horizontal direction corresponds to the azimuth angle of the antenna, and the vertical direction corresponds to the elevation angle of the antenna.

[0053] S12, adjusting the second AOA angle of the measured antenna relative to the receiving antenna, obtaining the first PDOA and the second PDOA of the measured antenna relative to the receiving antenna corresponding to each second AOA angle, wherein the second AOA angle is the AOA angle of the measured antenna corresponding to the second reference plane; Specifically, the AOA angle of the measured antenna corresponding to the second reference plane can be adjusted by adjusting the mechanical arm of the test antenna, and here the second reference plane can be understood as the horizontal direction or the vertical direction of the measured antenna. In an embodiment, the first reference plane is the horizontal direction of the measured antenna, and the second reference plane is the vertical direction of the measured antenna. By adjusting the rotation angle of the measured antenna in the vertical direction, the second AOA angle of the measured antenna relative to the test antenna can be obtained in fact, and the first PDOA and the second PDOA of the measured antenna relative to the test antenna can be obtained through the test antenna. It can be understood that each second AOA angle corresponds to a first PDOA and a second PDOA.

[0054] S13, a data value matrix of the first PDOA, the second PDOA, the first AOA angle and the second AOA angle is established, so as to obtain a two-dimensional grid relationship chart of the first AOA angle, the second AOA angle, the first PDOA and the second PDOA as a target chart. Specifically, according to the relationship between the first AOA angle and the second AOA angle and the first PDOA and the second PDOA, the data value matrix is established, and a two-dimensional grid relationship chart of the first AOA angle and the second AOA angle and the first PDOA and the second PDOA is generated according to the data value matrix. The points on the two-dimensional grid relationship chart respectively include the four parameters of the first AOA angle, the second AOA angle, the first PDOA and the second PDOA. In an embodiment, as shown in FIGS. 14 and 15, the first AOA angle can be taken as the first horizontal axis (corresponding to the azimuth angle in the figure), the first PDOA can be taken as the second horizontal axis, the second AOA angle (corresponding to the elevation angle in the figure) can be taken as the first vertical axis, and the first PDOA can be taken as the second vertical axis to establish the two-dimensional grid relationship. Each first AOA angle and the corresponding first PDOA and second PDOA form a curve in the first direction, each second AOA angle and the corresponding first PDOA and second PDOA form a curve in the second direction, each curve forms a two-dimensional grid relationship chart, and each curve intersects to divide the two-dimensional space into a plurality of grids. After obtaining the target chart, the target chart can be stored to form the AOA angle relationship between the measured antenna and the test antenna. Figure 3 and Figure 4

[0055] The table lookup process includes: S21, in the working process of the measured antenna, the first measured PDOA corresponding to the first reference plane and the second measured PDOA corresponding to the second reference plane of the measured antenna relative to the receiving antenna are obtained. Specifically, when the measured antenna is working, the receiving antenna, i.e., the test antenna, can obtain the first measured PDOA of the measured antenna on the first reference plane and the second measured PDOA on the second reference plane according to the data of the measured antenna. The measurement process can be obtained by the data processing chip of the receiving antenna.

[0056] S22, the corresponding target grid is obtained from the target chart based on the first measured PDOA and the second measured PDOA. That is, according to the obtained first measured PDOA and second measured PDOA, the target chart obtained in advance is looked up to obtain the corresponding grid of the current measured value in the target chart, so as to obtain the corresponding target grid.

[0057] ​S23, obtaining the first AOA angle and the second AOA angle corresponding to the target grid as the measured AOA angle of the measured antenna. Specifically, after obtaining the target grid corresponding to the current measured value, the first AOA angle and the second AOA angle corresponding to the grid can be obtained, and the first AOA angle and the second AOA angle at this time can be understood as the actual vertical angle of arrival AOA and the horizontal angle of arrival AOA of the measured antenna. Finally, the angle of arrival AOA of the measured antenna is obtained.

[0058] Optionally, in step S11, adjusting the first AOA angle of the measured antenna relative to the receiving antenna includes: adjusting the rotation angle of the receiving antenna in the first reference plane in a first preset range according to a first preset step to adjust the first AOA angle. Specifically, the azimuth angle can be adjusted from small to large in the first preset range, or the azimuth angle can be adjusted from large to small in the first preset range to finally achieve the process of adjusting the first AOA angle. The first preset range can be -60 degrees to 60 degrees, and the step of change can be 6 degrees. In order to improve the accuracy and test range, the first preset range and the first preset step can also be adjusted.

[0059] Optionally, in step S12, adjusting the second AOA angle of the measured antenna relative to the receiving antenna includes: adjusting the rotation angle of the receiving antenna in the second reference plane in a second preset range according to a second preset step to adjust the second AOA angle. Specifically, the elevation angle can be adjusted from small to large in the second preset range, or the elevation angle can be adjusted from large to small in the second preset range to finally achieve the process of adjusting the second AOA angle. The second preset range can be -60 degrees to 60 degrees, and the step of change can be 6 degrees. In order to improve the accuracy and test range, the second preset range and the second preset step can also be adjusted.

[0060] It can be understood that the adjustment process of the first AOA angle and the second AOA angle can be performed simultaneously, for example, each time the first AOA angle is adjusted, the second AOA angle is adjusted in turn in the adjustment range to obtain a group of second AOA angles. During the adjustment of the antenna, the azimuth angle and the elevation angle of the antenna can be adjusted respectively to obtain the first AOA angle and the second AOA angle.

[0061] Optionally, in the embodiment of the method for obtaining the angle of arrival (AOA) of the antenna, the method further comprises: obtaining a two-dimensional grid relationship chart corresponding to each service channel of the receiving antenna respectively to obtain a plurality of two-dimensional grid relationship charts; and sorting the plurality of two-dimensional grid relationship charts according to the probability of overlapping grids in the plurality of two-dimensional grid relationship charts to obtain a plurality of target charts and a corresponding priority order. Specifically, the steps S11 to S13 can be performed based on different service channels of the measured antenna and the receiving antenna, and finally a plurality of two-dimensional grid relationship charts corresponding to the service channels can be obtained, and the plurality of two-dimensional grid relationship charts are sorted. The sorting process can be based on the probability of overlapping grids in each two-dimensional grid relationship chart to sort the two-dimensional grid relationship charts according to priority. The more uniform the distribution of the cross curves in the two-dimensional grid relationship chart, the smaller the probability of grid overlap, the higher the grid quality, and the higher the priority. After the priority is obtained, the target chart corresponding to each two-dimensional grid relationship chart and the corresponding priority order are obtained. The target chart and the corresponding priority order can be written and stored at the same time. Figure 3 As shown in FIG. 5, it is a two-dimensional grid relationship chart of the PDOA and the AOA of the 5th channel of the UWB. Figure 4 As shown in FIG. 9, it is a two-dimensional grid relationship chart of the PDOA and the AOA of the 9th channel of the UWB. As can be seen from the chart of the 9th channel, the grids rarely cross and are uniformly distributed. The grids of the 5th channel have a lot of cross on the right side, so the priority of the 9th channel can be set to be higher than that of the 5th channel.

[0062] Optionally, in the embodiment of the method for obtaining the angle of arrival (AOA) of the antenna, the method further comprises: selecting a target service channel according to the priority order to perform a table lookup process. Specifically, the signal receiving channel of the measured antenna and the receiving antenna can be selected according to the priority order obtained above, for example, the data of the 9th channel can be selected as the priority for obtaining the AOA angle of the measured antenna based on the measured antenna. After the data of the 9th channel is selected, the two-dimensional grid relationship chart corresponding to the 9th channel is selected.

[0063] Optionally, in the embodiment of the antenna angle of arrival (AOA) acquisition method of the present application, the method further comprises: obtaining the maximum and minimum values of the first PDOA or the second PDOA of the overlapping grid in the two-dimensional grid relationship chart, connecting the maximum and minimum values by a straight line to obtain a new grid, and updating the two-dimensional grid relationship chart. Specifically, the process of obtaining the target chart further comprises: after obtaining the two-dimensional grid relationship chart, obtaining the overlapping grid in the two-dimensional grid relationship chart, obtaining the maximum and minimum values of the first PDOA of the overlapping grid, connecting the points corresponding to the maximum and minimum values by a straight line to obtain a new grid, and updating the two-dimensional grid relationship chart according to the new grid to obtain the final target chart. The points corresponding to the maximum and minimum values of the second PDOA of the overlapping grid can also be connected by a straight line to obtain a new grid. The two-dimensional grid relationship chart is updated according to the new grid to obtain the final target chart. The purpose is to obtain a new network that can contain all possible grids.

[0064] Optionally, in step S22, the corresponding target grid is obtained from the target chart based on the first measured PDOA and the second measured PDOA; the method comprises: obtaining the target grid corresponding to the first measured PDOA and the second measured PDOA by the inside-outside judgment algorithm of the closed curve. Specifically, the corresponding target grid is obtained based on the obtained first measured PDOA and the second measured PDOA by the inside-outside judgment algorithm of the closed curve. The common process is to draw a ray from the target point, and judge whether the number of intersection points of the ray and the curve is odd or even. If the number is odd, it indicates that the point is inside the curve, and if the number is even, it indicates that the point is outside the curve. In actual calculation, only one side needs to be judged.

[0065] Optionally, in step S23, the corresponding first AOA angle and second AOA angle are obtained according to the target grid, which comprises: obtaining the corresponding first AOA angle and second AOA angle in the target grid by the inverse distance weighting method. Specifically, the first AOA angle and the second AOA angle can be obtained in the target grid by the inverse distance weighting method. For details, refer to Figure 5 wherein the UWB module with three antenna element arrays in L shape can generate two groups of phase differences PDOA1 and PDOA2 after receiving the UWB signal, and the two groups of phase differences constitute a coordinate (PDOA1, PDOA2), and the corresponding point is Figure 6 the intersection point of the d1, d2, d3, d4 line segments in the red box in the middle. The distances from this intersection point to the four vertices of the merged grid described earlier are d1, d2, d3, d4, and the following formula is used,

[0066] D = ∑1 / d i = 1 / d1+1 / d2+1 / d3+1 / d4

[0067] Among them, λ1=1 / d1 / D, λ2=1 / d2 / D, λ3=1 / d3 / D, λ4=1 / d4 / D

[0068] This allows us to calculate D and λ1, λ2, λ3, and λ4. The mesh relationship based on AOA and PDOA corresponds to an AOA mesh, whose four vertices are A, B, C, and D. The vertex data is (x... A y A ), (x B y B ), (x C y C ), (x D y D The data for the intersection point are all known. Based on the obtained λ1, λ2, λ3, and λ4, the (x, y) value can be calculated. The formula is as follows:

[0069] (x, y) = (x A y A )*λ1+(x B y B )*λ2+(x C y C )*λ3+(x D y D The specific understanding of )*λ4 is that it realizes the process of proportionally mapping the intersection points of the PDOA grid to the AOA grid based on the above.

[0070] like Figure 6 and Figure 7 As shown, an antenna angle of arrival (AOA) acquisition device of the present invention includes a table writing device 110 and a table lookup device 120.

[0071] The writing device 110 includes:

[0072] The first acquisition unit 111 is used to adjust the first AOA angle of the antenna under test relative to the receiving antenna, and acquire the first PDOA and the second PDOA of the antenna under test relative to the receiving antenna corresponding to each first AOA angle. The first AOA angle is the AOA angle corresponding to the antenna under test and the first reference plane, the first PDOA is the PDOA corresponding to the antenna under test and the first reference plane, the second PDOA is the PDOA corresponding to the antenna under test and the second reference plane, and the second reference plane is perpendicular to the first reference plane.

[0073] The second acquisition unit 112 is used to adjust the second AOA angle of the antenna under test relative to the receiving antenna, and acquire the first PDOA and the second PDOA of the antenna under test relative to the receiving antenna corresponding to each second AOA angle, wherein the second AOA angle is the AOA angle of the antenna under test and the second reference plane.

[0074] The third obtaining unit 113 is configured to establish a data value matrix of the first PDOA, the second PDOA, the first AOA angle and the second AOA angle, so as to obtain a two-dimensional grid relationship chart of the first AOA angle, the second AOA angle, the first PDOA and the second PDOA as a target chart;

[0075] The table lookup device 120 comprises:

[0076] The fourth obtaining unit 121 is configured to obtain a first measured PDOA corresponding to the first reference plane and a second measured PDOA corresponding to the second reference plane of the measured antenna relative to the receiving antenna during the operation of the measured antenna.

[0077] The fifth obtaining unit 122 is configured to obtain a corresponding target grid from the target chart based on the first measured PDOA and the second measured PDOA.

[0078] The sixth obtaining unit 123 is configured to obtain the first AOA angle and the second AOA angle as the measured AOA angle of the measured antenna according to the target grid.

[0079] Specifically, the cooperation operation process between the units of the antenna angle of arrival (AOA) obtaining device can refer to the antenna angle of arrival (AOA) obtaining method described above, which will not be described here.

[0080] As shown in FIG. 6, a specific linear polarization antenna data is obtained, and a two-dimensional grid relationship chart as shown in FIG. 7 is obtained. Figure 8 As shown in FIG. 8, a specific circular polarization antenna data is obtained, and a two-dimensional grid relationship chart as shown in FIG. 9 is obtained. Figure 9 Figure 10 Figure 11 From the mapping chart of the final PDOA and AOA, it can be seen that the AOA angle test results of the two array antennas are ideal.

[0081] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some deformations and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application should belong to the scope of the claims of the present application.​​

Claims

1. An antenna angle of arrival (AOA) acquisition method, comprising: The method comprises a table writing process and a table searching process. The table writing process comprises: S11, adjusting a first AOA angle of a measured antenna relative to a receiving antenna to obtain a first PDOA and a second PDOA of the measured antenna relative to the receiving antenna corresponding to each first AOA angle, wherein the first AOA angle is an AOA angle of the measured antenna corresponding to a first reference plane, the first PDOA is a PDOA of the measured antenna corresponding to the first reference plane, and the second PDOA is a PDOA of the measured antenna corresponding to a second reference plane perpendicular to the first reference plane; S12, adjusting a second AOA angle of the measured antenna relative to the receiving antenna to obtain the first PDOA and the second PDOA of the measured antenna relative to the receiving antenna corresponding to each second AOA angle, wherein the second AOA angle is an AOA angle of the measured antenna corresponding to the second reference plane; S13, establishing a data value matrix of the first PDOA, the second PDOA, the first AOA angle and the second AOA angle to obtain a two-dimensional grid relationship chart of the first AOA angle, the second AOA angle, the first PDOA and the second PDOA as a target chart according to the data value matrix; The table searching process comprises: S21, obtaining a first measured PDOA corresponding to the first reference plane and a second measured PDOA corresponding to the second reference plane of the measured antenna relative to the receiving antenna during operation of the measured antenna; S22, obtaining a corresponding target grid from the target chart based on the first measured PDOA and the second measured PDOA; S23, obtaining a first AOA angle and a second AOA angle corresponding to the measured AOA angle of the measured antenna according to the target grid.

2. The antenna angle of arrival (AOA) acquisition method of claim 1, wherein, In the step S11, the adjusting of the first AOA angle of the measured antenna relative to the receiving antenna comprises adjusting a rotation angle of the receiving antenna in the first reference plane in a first preset range according to a first preset step to adjust the first AOA angle.

3. The antenna angle of arrival (AOA) acquisition method of claim 1, wherein, In the step S12, the adjusting of the second AOA angle of the measured antenna relative to the receiving antenna comprises adjusting a rotation angle of the receiving antenna in the second reference plane in a second preset range according to a second preset step to adjust the second AOA angle.

4. The antenna angle of arrival (AOA) acquisition method of claim 1, wherein, The method further comprises: obtaining a two-dimensional grid relationship chart corresponding to each service channel of the receiving antenna to obtain a plurality of two-dimensional grid relationship charts; sorting the plurality of two-dimensional grid relationship charts according to a probability of overlapping grids in the plurality of two-dimensional grid relationship charts to obtain a plurality of target charts and a corresponding priority order.

5. The antenna angle of arrival (AOA) acquisition method of claim 4, wherein, The method further comprises: selecting a target service channel according to the priority order to perform the table searching process.

6. The antenna angle of arrival (AOA) acquisition method of claim 1, wherein, The method further comprises: The first PDOA or the second PDOA maximum and minimum values of the overlapped grid in the two-dimensional grid relationship chart are obtained, the maximum and minimum values are connected by a straight line to obtain a new grid, and the two-dimensional grid relationship chart is updated.

7. The antenna angle of arrival (AOA) acquisition method of claim 1, wherein, In the step S22, the corresponding target grid is obtained from the target chart based on the first measured PDOA and the second measured PDOA; and the target grid corresponding to the first measured PDOA and the second measured PDOA is obtained by an inside-outside judgment algorithm of a closed curve.

8. The antenna angle of arrival (AOA) acquisition method of claim 1, wherein, In the step S23, the corresponding first AOA angle and second AOA angle are obtained according to the target grid, including: The first AOA angle and the second AOA angle corresponding to the target grid are obtained by using an inverse distance weighting method.

9. The antenna angle of arrival (AOA) acquisition method of claim 8, wherein, The first reference plane is a horizontal plane.

10. An antenna angle of arrival (AOA) acquisition device, characterized in that, The writing device and the searching device are included. The writing device includes: A first obtaining unit is configured to adjust a first AOA angle of a measured antenna relative to a receiving antenna, and obtain a first PDOA and a second PDOA of the measured antenna relative to the receiving antenna corresponding to each first AOA angle, wherein the first AOA angle is an AOA angle of the measured antenna corresponding to a first reference plane, the first PDOA is a PDOA of the measured antenna corresponding to the first reference plane, and the second PDOA is a PDOA of the measured antenna corresponding to a second reference plane perpendicular to the first reference plane. A second obtaining unit is configured to adjust a second AOA angle of the measured antenna relative to the receiving antenna, and obtain the first PDOA and the second PDOA of the measured antenna relative to the receiving antenna corresponding to each second AOA angle, wherein the second AOA angle is an AOA angle of the measured antenna corresponding to the second reference plane. A third obtaining unit is configured to establish a data value matrix of the first PDOA, the second PDOA, the first AOA angle and the second AOA angle, so as to obtain a two-dimensional grid relationship chart of the first AOA angle, the second AOA angle, the first PDOA and the second PDOA as a target chart according to the data value matrix. The searching device includes: A fourth obtaining unit is configured to obtain a first measured PDOA corresponding to the first reference plane and a second measured PDOA corresponding to the second reference plane of the measured antenna relative to the receiving antenna during operation of the measured antenna. A fifth obtaining unit is configured to obtain a corresponding target grid from the target chart based on the first measured PDOA and the second measured PDOA. A sixth obtaining unit is configured to obtain a first AOA angle and a second AOA angle corresponding to the target grid as measured AOA angles of the measured antenna.

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