CN115345015A - Method and device for optimizing the layout of a cylindrical antenna array - Google Patents
Method and device for optimizing the layout of a cylindrical antenna array Download PDFInfo
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Abstract
The present disclosure provides methods and apparatus for optimizing the layout of a cylindrical antenna array. The cylindrical antenna array comprises a plurality of sub-arrays, wherein each sub-array is provided with a transmitting array element and a receiving array element, and the transmitting array element sequence is intersected with the receiving array element sequence and arranged in the middle of the sub-array in a row and column mode. Determining a quantity expression of equivalent phase centers not less than a sampling point threshold value as a first antenna array layout condition, determining the quantity and minimum of transmitting array elements and receiving array elements in each sub-array to be solved as a second antenna array layout condition, determining a phase error not greater than the phase error threshold value as a third antenna array layout condition, and determining a first quantity value of the transmitting array elements and a second quantity value of the receiving array elements according to the first antenna array layout condition, the second antenna array layout condition and the third antenna array layout condition; and laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
Description
Technical Field
The present disclosure relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for optimizing a layout of a cylindrical antenna array.
Background
The imaging detection technology is widely applied to various application scenes, in particular to an active millimeter wave human body security inspection device. The active millimeter wave human body security inspection device can effectively detect target objects (including metal objects and non-metal objects) hidden in various parts of the human body under clothing coverage without directly contacting the human body of the person to be inspected by using the active millimeter wave imaging technology, and can extract information such as the shape, size, and position of the hidden target objects from an image generated based on the detection.
The active millimeter wave human body security inspection device generally includes a transmitting-receiving antenna array, which further includes a transmitting antenna array and a receiving antenna array, wherein the transmitting antenna array can transmit millimeter wave signals to a free space (including air and vacuum) according to a specific gain requirement and a specific beam width requirement, and the receiving antenna array can receive echo signals of the transmitted millimeter wave signals reflected by a target object from the free space.
Disclosure of Invention
In view of the foregoing, the present disclosure provides methods and apparatus for optimizing the layout of a cylindrical antenna array. The number of the array elements is reduced by the arrangement mode of the cylindrical antenna array provided by the disclosure under the condition of ensuring enough sampling points, and further, on the basis of the arrangement mode, the minimum value of the sum of the number of the transmitting array elements and the number of the receiving array elements is determined on the basis of meeting the arrangement conditions of each antenna array, so that the number of the array elements used under the condition of ensuring enough sampling points is minimum.
According to an aspect of the present disclosure, a method for optimizing a layout of a cylindrical antenna array is provided, where the cylindrical antenna array includes at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into several sub-arrays, each sub-array has a transmitting array element and a receiving array element arranged in a transceiving manner, in each sub-array, all transmitting array elements are uniformly arranged into a transmitting array element sequence, all receiving array elements are uniformly arranged into a receiving array element sequence, the transmitting array element sequence is orthogonal to the receiving array element sequence, and is arranged at a middle position of the sub-array in a row and column manner, the method includes: for each cylindrical antenna array, determining that the number expression of equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold value as a first antenna array layout condition; determining the minimum sum of the number of the transmitting array elements and the number of the receiving array elements in each subarray to be solved as a second antenna array layout condition; determining a first transmitting array element and a first receiving array element which are farthest from each other in each subarray; determining a phase error corresponding to a distance error according to a first signal propagation distance between the first transmitting array element and the first receiving array element and a second signal propagation distance of an equivalent phase center determined by the first transmitting array element and the first receiving array element; determining that the phase error is not greater than a phase error threshold as a third antenna array layout condition; determining a first numerical value of a transmitting array element and a second numerical value of a receiving array element in each subarray according to the first antenna array layout condition, the second antenna array layout condition and the third antenna array layout condition; and laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
According to another aspect of the present disclosure, there is also provided a method for optimizing a layout of a cylindrical antenna array, where the cylindrical antenna array includes at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into a plurality of sub-arrays, each sub-array has a transmitting array element and a receiving array element arranged separately for transmitting and receiving, in each sub-array, all the transmitting array elements are uniformly arranged into a transmitting array element sequence, all the receiving array elements are uniformly arranged into a receiving array element sequence, and the transmitting array element sequence is orthogonal to the receiving array element sequence and arranged at a middle position of the sub-array in a row and column manner, the method includes: for each cylindrical antenna array, determining that the number expression of equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold value as a first antenna array layout condition; determining the minimum sum of the number of the transmitting array elements and the number of the receiving array elements in each subarray to be solved as a second antenna array layout condition; determining a first transmitting array element and a first receiving array element which are farthest from each other in each subarray; determining that the coordinate difference between the first transmitting array element and the first receiving array element is not greater than an aperture irradiation range threshold as a fourth antenna array layout condition; determining a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each subarray according to the first antenna array layout condition, the second antenna array layout condition and the fourth antenna array layout condition; and laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
According to another aspect of the present disclosure, there is also provided an apparatus for optimizing a layout of a cylindrical antenna array, where the cylindrical antenna array includes at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into a plurality of sub-arrays, each sub-array has a transmitting array element and a receiving array element arranged separately for transmitting and receiving, in each sub-array, all the transmitting array elements are uniformly arranged into a transmitting array element sequence, all the receiving array elements are uniformly arranged into a receiving array element sequence, and the transmitting array element sequence is orthogonal to the receiving array element sequence and arranged at a middle position of the sub-array in a row and column manner, the apparatus includes: a first layout condition determining unit configured to determine, for each of the cylindrical antenna arrays, that a number expression of equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold as a first antenna array layout condition; the second layout condition determining unit determines the minimum sum of the number of the transmitting array elements and the number of the receiving array elements in each sub-array to be solved as a second antenna array layout condition; an array element determining unit for determining a first transmitting array element and a first receiving array element which are farthest from each subarray; a phase error determination unit, configured to determine a phase error corresponding to a distance error according to a first signal propagation distance between the first transmitting array element and the first receiving array element and a second signal propagation distance of an equivalent phase center determined by the first transmitting array element and the first receiving array element; a third layout condition determining unit that determines, as a third antenna array layout condition, that the phase error is not greater than a phase error threshold; a quantity value determining unit, configured to determine a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each sub-array according to the first antenna array layout condition, the second antenna array layout condition, and the third antenna array layout condition; and the antenna layout unit is used for laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
According to another aspect of the present disclosure, there is also provided an apparatus for optimizing a layout of a cylindrical antenna array, where the cylindrical antenna array includes at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into a plurality of sub-arrays, each sub-array has a transmitting array element and a receiving array element arranged separately for transmitting and receiving, in each sub-array, all the transmitting array elements are uniformly arranged into a transmitting array element sequence, all the receiving array elements are uniformly arranged into a receiving array element sequence, and the transmitting array element sequence is orthogonal to the receiving array element sequence and arranged at a middle position of the sub-array in a row and column manner, the apparatus includes: a first layout condition determining unit configured to determine, for each of the cylindrical antenna arrays, that a number expression of equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold as a first antenna array layout condition; the second layout condition determining unit determines the minimum sum of the numbers of the transmitting array elements and the receiving array elements in each subarray to be solved as a second antenna array layout condition; an array element determining unit for determining a first transmitting array element and a first receiving array element which are farthest from each subarray; a fourth layout condition determining unit, configured to determine that a coordinate difference between the first transmit array element and the first receive array element is not greater than an aperture irradiation range threshold as a fourth antenna array layout condition; a quantity value determining unit, configured to determine a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each sub-array according to the first antenna array layout condition, the second antenna array layout condition, and the fourth antenna array layout condition; and the antenna layout unit is used for laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
According to another aspect of the present disclosure, there is also provided an electronic device including: at least one processor, a memory coupled to the at least one processor, and a computer program stored on the memory, the at least one processor executing the computer program to implement any of the methods for optimizing a layout of a cylindrical antenna array.
According to another aspect of the present disclosure, there is also provided a computer readable storage medium storing a computer program which, when executed by a processor, implements a method for optimizing the layout of a cylindrical antenna array as described in any one of the above.
According to another aspect of the present disclosure, there is also provided a computer program product comprising a computer program which, when executed by a processor, implements a method for optimizing the layout of a cylindrical antenna array as described in any of the above.
Drawings
A further understanding of the nature and advantages of the present disclosure may be realized by reference to the following drawings. In the drawings, similar components or features may have the same reference numerals.
Fig. 1 shows a schematic diagram of one example of a cylindrical antenna array according to the present disclosure.
Fig. 2 shows a schematic diagram of one example of a cylindrical antenna array divided into a plurality of sub-arrays according to the present disclosure.
Fig. 3A, 3B, 3C and 3D show schematic diagrams of one example of an arrangement of transmit and receive array elements in a sub-array according to the present disclosure.
Fig. 4 shows a schematic diagram of one example of one layout of a cylindrical antenna array according to the present disclosure.
Fig. 5 shows a flow diagram of one example of a method for optimizing the layout of a cylindrical antenna array according to the present disclosure.
Fig. 6 shows a schematic diagram of one example of a relationship between a first transmit array element, a first receive array element, an equivalent phase center and a target spatial point according to the present disclosure.
Fig. 7 illustrates a schematic diagram of one example of determining a first quantity value and a second quantity value in accordance with the present disclosure.
Fig. 8 shows a flow diagram of one example of a method for optimizing the layout of a cylindrical antenna array according to the present disclosure.
Fig. 9 illustrates a block diagram of one example of an apparatus for optimizing a layout of a cylindrical antenna array in accordance with the present disclosure.
Fig. 10 shows a block diagram of one example of an apparatus for optimizing the layout of a cylindrical antenna array according to the present disclosure.
Fig. 11 shows a block diagram of an electronic device for implementing a method for cylindrical antenna array layout optimization, in accordance with an embodiment of the present disclosure.
Fig. 12 shows a block diagram of an electronic device for implementing a cylindrical antenna array layout optimization method of an embodiment of the present disclosure.
Detailed Description
The subject matter described herein will be discussed with reference to example embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand the subject matter described herein and are not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as necessary. In addition, features described with respect to some examples may also be combined in other examples.
As used herein, the term "include" and its variants mean open-ended terms in the sense of "including, but not limited to. The term "based on" means "based at least in part on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment". The term "another embodiment" means "at least one other embodiment". The terms "first," "second," and the like may refer to different or the same object. Other definitions, whether explicit or implicit, may be included below. The definition of a term is consistent throughout the specification unless the context clearly dictates otherwise.
The imaging detection technology is widely applied to various application scenes, in particular to an active millimeter wave human body security inspection device. The active millimeter wave human body security inspection device can effectively detect target objects (including metal objects and non-metal objects) hidden in various parts of the human body under clothing coverage without directly contacting the human body of the person to be inspected by using the active millimeter wave imaging technology, and can extract information such as the shape, size, and position of the hidden target objects from an image generated based on the detection.
The active millimeter wave human body security inspection device generally comprises a transmitting-receiving antenna array, which further comprises a transmitting antenna array and a receiving antenna array, wherein the transmitting antenna array can transmit millimeter wave signals to a free space (including air and vacuum) according to specific gain requirements and beam width requirements, and the receiving antenna array can receive echo signals of the transmitted millimeter wave signals reflected by a target object from the free space.
However, in general, the current array antenna employs a transmit-receive mechanism, and after each array element in the array antenna sends out a transmit signal, the array element receives an echo signal corresponding to the transmit signal. Under the transceiving mechanism, in order to collect information as comprehensive as possible, denser array elements need to be arranged, the number of the array elements is increased, and therefore the production cost of the array antenna is increased.
In view of the foregoing, the present disclosure provides methods and apparatus for optimizing the layout of a cylindrical antenna array. The cylindrical antenna array comprises at least one cylindrical antenna array, each cylindrical antenna array is evenly divided into a plurality of sub-arrays, transmitting array elements and receiving array elements which are separately transmitted and received are arranged in each sub-array, all the transmitting array elements are evenly arranged into a transmitting array element sequence, all the receiving array elements are evenly arranged into a receiving array element sequence, and the transmitting array element sequence is in positive intersection with the receiving array element sequence and is arranged in the middle of the sub-array in a row and column mode. In the method, aiming at each cylindrical antenna array, determining that the number expression of equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold value as a first antenna array layout condition; determining the minimum sum of the number of the transmitting array elements and the number of the receiving array elements in each subarray to be solved as a second antenna array layout condition; determining a first transmitting array element and a first receiving array element which are farthest from each other in each subarray; determining a phase error corresponding to the distance error according to a first signal propagation distance between a first transmitting array element and a first receiving array element and a second signal propagation distance of an equivalent phase center determined by the first transmitting array element and the first receiving array element; determining that the phase error is not greater than the phase error threshold as a third antenna array layout condition; determining a first numerical value of a transmitting array element and a second numerical value of a receiving array element in each subarray according to the first antenna array layout condition, the second antenna array layout condition and the third antenna array layout condition; and laying out each cylindrical antenna array according to the first numerical value and the second numerical value. The number of the array elements is reduced by the arrangement mode of the cylindrical antenna array provided by the disclosure under the condition of ensuring enough sampling points, and further, on the basis of the arrangement mode, the minimum value of the sum of the number of the transmitting array elements and the number of the receiving array elements is determined on the basis of meeting the arrangement conditions of each antenna array, so that the number of the array elements used under the condition of ensuring enough sampling points is minimum.
The method for optimizing the layout of a cylindrical antenna array and the array antenna provided by the present disclosure are described in detail below with reference to the accompanying drawings.
In the present disclosure, the antenna array is disposed on a cylindrical surface, and the cylindrical surface on which the cylindrical antenna array is distributed may be a complete cylindrical surface with a horizontal included angle of 360 °, or may be a partial cylindrical surface with a horizontal included angle of less than 360 °. The cylindrical antenna array to be layout optimized in the present disclosure may include one or more cylindrical antenna arrays, and the cylinder to which each cylindrical antenna array belongs may be a partial cylinder in the same complete cylinder. The horizontal included angles of different cylindrical antenna arrays can be the same or different. In the complete cylindrical surface, the cylindrical surfaces of the cylindrical antenna arrays can be symmetrically arranged or asymmetrically arranged.
Fig. 1 shows a schematic diagram of one example of a cylindrical antenna array according to the present disclosure. As shown in fig. 1, the cylindrical antenna array to be optimized in layout in this example includes two cylindrical antenna arrays, and horizontal included angles of the two cylindrical antenna arrays are the same and are both Θ. The heights of the two cylindrical antenna arrays are the same and are both H.
In the present disclosure, layout optimization may be performed independently for each cylindrical antenna array. Each cylindrical antenna array can be uniformly divided into a plurality of sub-arrays, and the size of each sub-array is the same, that is, the height and the horizontal included angle of each sub-array are the same. Fig. 2 shows a schematic diagram of one example of a cylindrical antenna array divided into a plurality of sub-arrays according to the present disclosure. As shown in fig. 2, a cylindrical antenna array is divided into a plurality of sub-arrays with the same size, each sub-array has a height h and a horizontal angle θ.
In one dividing manner of the sub-arrays, the heights of the cylindrical antenna arrays may be uniformly divided to obtain the height of each sub-array. And uniformly dividing the horizontal included angle of the cylindrical antenna array to obtain the horizontal included angle of each sub-array.
In the disclosure, each subarray may be arranged with transmit array elements and receive array elements that are separately configured for transceiving, and each subarray includes at least one transmit array element and at least one receive array element. The number of transmit elements and the number of receive elements included in different sub-arrays may be the same. In the same subarray, the number of the transmitting array elements and the number of the receiving array elements may be the same or different.
In each sub-array, all transmit array elements may be arranged uniformly into a sequence of transmit array elements and all receive array elements may be arranged uniformly into a sequence of receive array elements. In one example, the spacing between two adjacent transmit array elements in the sequence of transmit array elements may be equal. The spacing between two adjacent receiving array elements in the sequence of receiving array elements may be equal. The transmitting array element sequence and the receiving array element sequence are arranged to be in positive intersection, namely, the transmitting array element sequence and the receiving array element sequence are perpendicular to each other. In addition, the transmitting array element sequence and the receiving array element sequence are arranged in the middle of the sub-array in a row and column mode.
Fig. 3A shows a schematic diagram of one example of an arrangement of transmit and receive array elements in a sub-array according to the present disclosure. As shown in fig. 3A, the sub-array includes 4 transmitting array elements and 4 receiving array elements, where T denotes the transmitting array element and R denotes the receiving array element. The transmitting array element sequence is arranged as a row in the middle position of the subarray, and the receiving array element sequence is arranged as a column in the middle position of the subarray. The transmitting array element sequence and the receiving array element sequence are crossed.
In one example, the transmit array element sequences may be arranged as rows and the receive array element sequences may be arranged as columns in each subarray. As shown in fig. 3A. In another example, the transmit array element sequence may also be arranged as a column and the receive array element sequence may also be arranged as a column. Fig. 3B shows a schematic diagram of another example of an arrangement of transmit and receive array elements in a sub-array according to the present disclosure. As shown in fig. 3B, the transmit array element sequence is arranged as a column at the middle position of the sub-array, and the receive array element sequence is arranged as a row at the middle position of the sub-array. The transmitting array element sequence and the receiving array element sequence are crossed.
In the present disclosure, the positive intersection manner of the transmitting array element sequence and the receiving array element sequence in different sub-arrays may be the same or different. The same normal phase inversion method will be described below as an example.
In the present disclosure, the array antenna performs transceiving by a one-transmit-multiple-receive mechanism, that is, a signal transmitted by one transmitting array element may be received by multiple receiving array elements. In each sub-array, the signals from the transmitting array elements in the sub-array can only be received by the receiving array elements in the sub-array. The signal receiving and transmitting processes of the sub-arrays are independent. For example, as shown in the sub-array of fig. 3A, if a signal is sent by one transmitting array element, the echo signal corresponding to the signal can only be received by 4 receiving array elements in the sub-array.
In the present disclosure, there is an intersection position when the transmitting array element sequence and the receiving array element sequence are intersected, and the intersection position belongs to both the transmitting array element sequence and the receiving array element sequence. In one example, no array element may be provided at the intersection where the transmit array element sequence is crossing the receive array element sequence. In this example, when the number of rows and columns obtained by uniformly dividing the sub-array is the same, the number of receiving array elements arranged in the sub-array is the same as the number of transmitting array elements. Taking fig. 3A and 3B as an example, as shown in fig. 3A and 3B, no array element is set at the intersection position where the transmission array element sequence and the reception array element sequence are intersected, and the sub-array is uniformly divided into 4 rows and 4 columns, so that the number of the reception array elements and the number of the transmission array elements arranged in the sub-array are the same, and are both 4.
In another example, in each subarray, an array element may be arranged at an intersection position where the transmission array element sequence and the reception array element sequence are intersected, and the arranged array element may be a transmission array element or a reception array element. In this example, when the number of rows and columns obtained by uniformly dividing the sub-array is the same, the number of receiving array elements arranged in the sub-array differs from the number of transmitting array elements by 1.
Fig. 3C and 3D show schematic diagrams of another example of an arrangement of transmit and receive array elements in a sub-array according to the present disclosure. As shown in fig. 3C and 3D, the intersection position where the transmitting array element sequence and the receiving array element sequence are intersected is at the central position of the sub-array, and the array element arranged at the position can be the transmitting array element or the receiving array element. The "T/R" in fig. 3C and 3D indicates setting as either a transmit array element or a receive array element.
In one example, the transmit and receive elements in each sub-array are arranged in the same manner. Fig. 4 shows a schematic diagram of one example of one layout of a cylindrical antenna array according to the present disclosure. As shown in fig. 4, the sub-arrays in the cylindrical antenna array are the same size and are uniformly distributed. The quantity of the transmitting array elements and the quantity of the receiving array elements in each subarray are the same, and the arrangement mode of the transmitting array elements and the arrangement mode of the receiving array elements are also the same. And the transmitting array element or the receiving array element is arranged at the intersection position where the transmitting array element sequence and the receiving array element sequence are intersected in each subarray. In one example, the transmit array elements are disposed at intersecting positions of non-intersecting phases in all of the sub-arrays. In another example, the receive array elements are placed at the intersection of the non-intersecting points in all the sub-arrays.
Fig. 5 shows a flow diagram of one example 500 of a method for optimizing a layout of a cylindrical antenna array according to the present disclosure.
The method illustrated in fig. 5 may be applied to individual cylindrical antenna arrays, and layout optimization may be performed independently between the individual cylindrical antenna arrays. A cylindrical antenna array will be described as an example. In addition, the array elements of each subarray in this embodiment are arranged in the same manner, that is, the number of the transmitting array elements and the number of the receiving array elements in each subarray are the same, and the arrangement manner is the same.
As shown in fig. 5, at 510, for each cylindrical antenna array, a number expression of equivalent phase centers in the cylindrical antenna array that is not less than a sampling point threshold may be determined as a first antenna array layout condition.
In the present disclosure, the sampling point threshold may be determined according to the height and horizontal angle of the cylinder to which the cylindrical antenna array belongs, and the array element horizontal angle threshold and the array element height threshold. The cylindrical surface to which the cylindrical antenna array belongs can be taken as a whole, and the height and the horizontal included angle of the cylindrical surface are predetermined. When the cylinder to which the cylindrical antenna array belongs is a complete cylinder, the corresponding horizontal angle is 360 °. The array element horizontal angle threshold and the array element height threshold are thresholds for each array element, and the two thresholds satisfy the nyquist sampling theorem. And aiming at each array element, the horizontal included angle of the array element is not more than the threshold value of the horizontal included angle of the array element, and the height of the array element is not more than the threshold value of the height of the array element. For example, the threshold value of the horizontal included angle of the array element can be set to 0.6 degrees, and the threshold value of the height of the array element can be set to 10mm.
On the cylindrical surface, each array element can be uniformly arranged according to rows and columns, so that the spacing between adjacent columns is equal, and the spacing between adjacent rows is equal. The sampling point threshold of the cylindrical antenna array can be calculated according to the following formula:
wherein S is P Representing the sample point threshold, ceil represents the ceiling function, H represents the height of the cylinder,denotes the horizontal angle of the cylinder,. DELTA.h 0 Representing array element height threshold, Δ θ 0 And indicating the array element horizontal angle threshold value.Indicates the number of sample points in the height direction,indicating the number of samples in the horizontal angular direction.
In addition, the number expression of the equivalent phase centers in the cylindrical antenna array can be determined according to the number of the transmitting array elements, the receiving array elements and the sub-arrays in each sub-array.
In each sub-array, the signal transmitted by each transmitting array element can be received by all receiving array elements in the sub-array. Thus, the number of transmit channels formed by the transmit and receive elements is the number of transmit elements multiplied by the number of receive elements. Each transmit channel corresponds to an equivalent phase center, such that the number of equivalent phase centers in each sub-array is the number of transmit array elements multiplied by the number of receive array elements, which can be expressed by the formula: t is S ×R S Wherein, T S Representing the number of transmit array elements, R, in each sub-array S Indicating the number of receiving array elements in each sub-array.
Further, multiplying the number of equivalent phase centers in each sub-array by the number of sub-arrays in the cylindrical antenna arrayThe number of equivalent phase centers in the cylindrical antenna array can be found. Can be expressed by the formula: s Epc =A×(T S ×R S ) Wherein A represents the number of subarrays, S Epc Representing the number of equivalent phase centers in the cylindrical antenna array.
After determining the number expression of the equivalent phase centers and the sampling point threshold, determining that the number expression of the equivalent phase centers is not less than the sampling point threshold as the first antenna array layout condition.
The first antenna array layout condition may be expressed as: s Epc ≥S P . For the layout of the cylindrical antenna array, the first antenna array layout condition needs to be satisfied.
At 520, the second antenna array layout condition may be determined by minimizing the sum of the numbers of transmit and receive elements in each subarray.
The first antenna array layout condition may be expressed as: y = min (T) S +R S ) Wherein y represents the sum of the number of transmitting array elements and receiving array elements, and min represents the minimum function. For each subarray, the less the number of transmit and receive elements used, the more optimal the layout, while ensuring the number of samples. When the sum of the number of the transmitting array elements and the number of the receiving array elements is minimum, the layout of the sub-array is optimal.
It is noted that the operations of 510, 520, and 530 are performed sequentially to determine the first antenna array layout condition. The determining order of the first antenna array layout condition and the second antenna array layout condition may not be limited, and the first antenna array layout condition may be determined first and then the second antenna array layout condition may be determined as shown in fig. 5; the second antenna array layout condition can be determined first, and then the first antenna array layout condition is determined; the first antenna array layout condition and the second antenna array layout condition may also be determined simultaneously.
At 530, the first transmitting array element and the first receiving array element that are farthest apart in each subarray may be determined.
In a layout mode that the transmitting array element sequence and the receiving array element sequence are intersected and are arranged in the middle of the subarrays in a row and column mode, the distance between the first transmitting array element and the first receiving array element is farthest, the first transmitting array element is the first or the last in the transmitting array element sequence, and the first receiving array element is the first or the last in the receiving array element sequence.
Taking fig. 3A as an example, as shown in fig. 3A, if the distance between the first left transmitting array element in the transmitting array element sequence and the first upper receiving array element in the receiving array element sequence is farthest, the first left transmitting array element may be determined as the first transmitting array element, and the first upper receiving array element may be determined as the first receiving array element.
At 540, a phase error corresponding to the distance error is determined based on a first signal propagation distance between the first transmitting array element and the first receiving array element and a second signal propagation distance of the equivalent phase center determined from the two.
A first signal propagation path between the first transmitting array element and the first receiving array element is that after the first transmitting array element sends a signal, the signal reaches a target space point and is reflected to form an echo signal, and the echo signal is received by the first receiving array element.
The equivalent phase centre determined by the two can be determined by the first transmitting array element and the first receiving array element. The equivalent phase center determined by the two can be equivalent to an array element which is positioned in the same receiving and transmitting mode, and the second signal propagation path of the equivalent phase center is formed by the reflection of a signal sent by the equivalent phase center after the signal reaches a target space point, and the echo signal is propagated to the equivalent phase center.
In the present disclosure, the distance error of a signal propagation path is a distance error between a first signal propagation path and a second signal propagation path.
In one example, a first signal propagation distance between the first transmit and first receive array elements, respectively, and the target spatial point may be calculated. The target spatial point may be a spatial point at which the signal emitted by the first transmitting array element arrives and at which the signal is reflected. When a cylindrical antenna array is applied to a radar apparatus, the target spatial point may be any position point on an object detected by the radar apparatus. The first signal propagation distance is formed by the distance between the first transmitting array element and the target space point and the distance between the first receiving array element and the target space point.
Fig. 6 shows a schematic diagram of one example of a relationship between a first transmit array element, a first receive array element, an equivalent phase center and a target spatial point according to the present disclosure. As shown in FIG. 6, R 1 Denotes a first receiving unit, T 1 Denotes a first transmission unit, P denotes a target spatial point, and Eqc denotes an equivalent phase center determined by the first reception unit and the first transmission unit. The first signal propagation distance is T 1 The sum of R and P 1 Sum of the distances from P.
In one example, the coordinates of the target space point P may be set to (x, y, z), and the first transmit array element T 1 Has a cylindrical surface coordinate of (R) 0 ,θ t ,z t ) First receiving array element R 1 Has a cylindrical surface coordinate of (R) 0 ,θ r ,z r ) Wherein R is 0 Representing the radius of the cylinder to which the array of cylindrical antennas belongs, theta t And z t Representing a first transmission element T 1 Theta and z coordinates of theta, theta r And z r Representing the first receiving array element R 1 Theta and z coordinates. The first transmitting array element T 1 Distance L from target space point P t Can be expressed as:
first receiving array element R 1 Distance L from target space point P r Can be expressed as:
the first signal propagation distance is (L) t +L r )。
A second signal propagation distance between the equivalent phase center determined by the first transmitting and first receiving array elements and the target spatial point may be calculated, the second signal propagation distance comprising the distance of the signal from the equivalent phase center to the target spatial point and the distance from the target spatial point back to the equivalent phase center. Taking FIG. 6 as an example, as shown in FIG. 6, the second signal propagation distance is equal to the distance between Eqc and P multiplied by 2.
In one example, the coordinates of the target space point P may be set to (x, y, z), and the first transmit array element T 1 Has a cylindrical surface coordinate of (R) 0 ,θ t ,z t ) First receiving array element R 1 Has a cylindrical surface coordinate of (R) 0 ,θ r ,z r ). The coordinates (R) of the equivalent phase center can be determined according to the following formula e ,θ e ,z e ):
The distance L between the equivalent phase center and the target space point P e Can be expressed as:
a range error is then determined based on the first signal propagation distance and the second signal propagation distance. In one example, the difference between the first signal propagation distance and the second signal propagation distance is taken as the distance error. In one example, the distance error Δ L may be expressed as (L) t +L r )-2L e 。
And then, obtaining a phase error corresponding to the distance error according to the relation between the distance and the phase. In one example, the phase error may be calculated according to the following equation
Wherein c represents the speed of light, f c Representing the centre frequency according to the maximum operating frequency f max And minimum operating frequency f min Thus obtaining the product. In one example, f c =f max -f min 。
At 550, a phase error not greater than the phase error threshold may be determined as a third antenna array layout condition.
The phase error threshold satisfies the nyquist sampling theorem and is the maximum phase error of imaging. If the phase error threshold is exceeded, imaging cannot be performed or the imaging effect is poor. Therefore, the phase error should be less than or equal to the phase error threshold. The third antenna array layout condition may be expressed as:wherein,indicating a phase error threshold.
At 560, a first magnitude value of transmit elements and a second magnitude value of receive elements in each sub-array may be determined based on the first antenna array layout condition, the second antenna array layout condition, and the third antenna array layout condition.
The determined first and second quantity values simultaneously satisfy a first antenna array layout condition, a second antenna array layout condition, and a third antenna array layout condition.
In one example, the first antenna array layout condition, the second antenna array layout condition, and the third antenna array layout condition may be graphically represented, a minimum value of a sum of numbers of transmit elements and receive elements in the sub-array is graphically determined, and a first number value of the transmit elements and a second number value of the receive elements in the sub-array are further determined based on the minimum value.
Fig. 7 illustrates a schematic diagram of one example of determining a first quantity value and a second quantity value in accordance with the present disclosure. In the coordinate system shown in fig. 7, the y-axis represents the sum of the numbers of transmitting array elements and receiving array elements in the sub-array, and the horizontal axis represents the number of transmitting array elements. The area satisfying the first antenna array layout condition, the second antenna array layout condition and the third antenna array layout condition is a curve and an area above the curve. Thus, the minimum value in the curve and the region above the curve, which is the minimum value of y, can be determined. After the minimum value of y is determined, the first magnitude value and the second magnitude value may be further determined. It should be noted that the horizontal axis may be represented by the number of transmitting array elements, and may also be represented by the number of receiving array elements.
At 570, the respective cylindrical antenna arrays may be laid out according to the first and second quantitative values.
In one example, it may also be determined that the coordinate difference of the first transmit array element and the first receive array element is not greater than the aperture illumination range threshold as the fourth antenna array layout condition.
The aperture irradiation range threshold is the maximum range that the array elements can irradiate, so that the irradiation range of each array element can be imaged within the maximum range, otherwise, the imaging cannot be performed. The aperture illumination range may include an illumination range in the z-axis direction and an illumination range in the horizontal angle direction.
In one example, a first sub-condition may be determined that the difference in horizontal angle between the first transmitting array element and the first receiving array element is not greater than a horizontal angle threshold in the aperture illumination range. The horizontal angle threshold is used to represent the maximum illumination range in the horizontal angular direction. The first sub-condition may be expressed as: [ theta ] t -θ r |≤θ u Wherein, | θ t -θ r I represents the horizontal angle difference between the first transmitting array element and the first receiving array element, theta u Representing a horizontal angle threshold.
The second sub-condition may be determined that the difference in height between the first transmitting array element and the first receiving array element in the vertical direction is not larger than a height threshold in the aperture illumination. The height threshold is used to represent the maximum illumination range in the z-axis direction. The second sub-condition may be expressed as:wherein, theta v Represents the maximum illumination angle in the z-axis direction, | z t -z r And | represents a height difference between the first transmitting array element and the first receiving array element in the vertical direction.
After the first and second sub-conditions are determined, the first and second sub-conditions may be combined into a fourth antenna array layout condition.
After the fourth antenna array layout condition is determined, the first number value of the transmitting array element and the second number value of the receiving array element in each sub-array can be determined according to the first antenna array layout condition, the second antenna array layout condition, the third antenna array layout condition and the fourth antenna array layout condition. At this time, the determined first and second quantity values simultaneously satisfy the first antenna array layout condition, the second antenna array layout condition, the third antenna array layout condition, and the fourth antenna array layout condition.
In one example, the first antenna array layout condition, the second antenna array layout condition, the third antenna array layout condition, and the fourth antenna array layout condition may be graphically represented, a minimum value of a sum of numbers of transmit elements and receive elements in the sub-array is graphically determined, and a first number value of the transmit elements and a second number value of the receive elements in the sub-array are further determined based on the minimum value.
Fig. 8 shows a flow diagram of one example 800 of a method for optimizing a layout of a cylindrical antenna array according to the present disclosure.
In the example shown in fig. 8, the cylindrical antenna array includes at least one cylindrical antenna array, each cylindrical antenna array is evenly divided into several sub-arrays, each sub-array is arranged with transmitting array elements and receiving array elements which are separately transmitted and received, in each sub-array, all transmitting array elements are evenly arranged into a transmitting array element sequence, all receiving array elements are evenly arranged into a receiving array element sequence, the transmitting array element sequence is intersected with the receiving array element sequence, and arranged in the middle of the sub-array in a row and column manner.
As shown in fig. 8, at 810, for each cylindrical antenna array, determining that the number expression of the equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold as a first antenna array layout condition, where the sampling point threshold is determined according to the height and horizontal angle of the cylinder to which the cylindrical antenna array belongs, and the array element horizontal angle threshold and the array element height threshold.
At 820, the minimum sum of the numbers of the transmitting array elements and the receiving array elements in each sub-array is determined as the second antenna array layout condition.
At 830, the first transmit array element and the first receive array element that are the farthest apart in each sub-array are determined.
At 840, a fourth antenna array layout condition is determined if the difference in coordinates between the first transmit array element and the first receive array element is not greater than the aperture illumination range threshold.
At 850, a first magnitude value of the transmit array elements and a second magnitude value of the receive array elements in each sub-array are determined based on the first antenna array layout condition, the second antenna array layout condition, and the fourth antenna array layout condition.
At 860, each cylindrical antenna array is laid out according to the first and second quantitative values.
In one example, determining that the coordinate difference of the first transmit array element and the first receive array element is not greater than the aperture illumination range threshold as the fourth antenna array layout condition comprises: determining that the difference of horizontal included angles between the first transmitting array element and the first receiving array element is not greater than a horizontal included angle threshold value in an aperture irradiation range as a first sub-condition; determining that the height difference between the first transmitting array element and the first receiving array element in the vertical direction is not more than the height threshold value in the aperture irradiation range as a second sub-condition; and combining the first and second sub-conditions into a fourth antenna array layout condition.
Fig. 9 shows a block diagram of one example of an apparatus (antenna layout optimization apparatus 900) for optimizing the layout of a cylindrical antenna array according to the present disclosure.
In the example shown in fig. 9, the cylindrical antenna array includes at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into several sub-arrays, each sub-array is arranged with transmitting array elements and receiving array elements which are separately arranged in transceiving, in each sub-array, all transmitting array elements are uniformly arranged into a transmitting array element sequence, all receiving array elements are uniformly arranged into a receiving array element sequence, the transmitting array element sequence is orthogonal to the receiving array element sequence, and arranged in the middle of the sub-array in a row and column manner.
As shown in fig. 9, the antenna layout optimization apparatus 900 includes: a first layout condition determining unit 910, a second layout condition determining unit 920, an array element determining unit 930, a phase error determining unit 940, a third layout condition determining unit 950, a magnitude value determining unit 960, and an antenna layout unit 970.
The first layout condition determining unit 910 may be configured to determine, as the first antenna array layout condition, for each cylindrical antenna array, that the number expression of the equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold, where the sampling point threshold is determined according to a height and a horizontal angle of a cylinder to which the cylindrical antenna array belongs, and an array element horizontal angle threshold and an array element height threshold.
The second layout condition determining unit 920 may be configured to determine the minimum sum of the numbers of the transmit array elements and the receive array elements in each subarray to be solved as the second antenna array layout condition.
The array element determining unit 930 may be configured to determine a first transmitting array element and a first receiving array element which are farthest from each sub-array.
The phase error determination unit 940 may be configured to determine a phase error corresponding to the distance error according to a first signal propagation distance between the first transmitting array element and the first receiving array element and a second signal propagation distance of the equivalent phase center determined by the first transmitting array element and the first receiving array element.
In one example, the phase error determination unit 940 may be further configured to: calculating a first signal propagation distance between a first transmitting array element, a first receiving array element and a target space point; calculating a second signal propagation distance between the equivalent phase center determined by the first transmitting array element and the first receiving array element and the target space point; determining a range error based on the first signal propagation distance and the second signal propagation distance; and obtaining a phase error corresponding to the distance error according to the relation between the distance and the phase.
The third layout condition determining unit 950 may be configured to determine that the phase error is not greater than the phase error threshold as the third antenna array layout condition.
The quantity value determining unit 960 may be configured to determine a first quantity value of the transmitting array elements and a second quantity value of the receiving array elements in each sub-array according to the first antenna array layout condition, the second antenna array layout condition and the third antenna array layout condition.
The antenna layout unit 970 may be configured to layout the respective cylindrical antenna arrays according to the first and second quantitative values.
In one example, the antenna layout optimization apparatus 900 may further include a fourth layout condition determination unit, which may be configured to: and determining that the coordinate difference between the first transmitting array element and the first receiving array element is not more than the aperture irradiation range threshold as a fourth antenna array layout condition. The quantitative value determination unit 960 may also be configured to: and determining a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each sub-array according to the first antenna array layout condition, the second antenna array layout condition, the third antenna array layout condition and the fourth antenna array layout condition.
In one example, the fourth layout condition determination unit may be further configured to: determining a horizontal included angle threshold value, which is used when the difference between the horizontal included angles of the first transmitting array element and the first receiving array element is not more than the aperture irradiation range, as a first sub-condition; determining that the height difference between the first transmitting array element and the first receiving array element in the vertical direction is not more than the height threshold value in the aperture irradiation range as a second sub-condition; and combining the first and second sub-conditions into a fourth antenna array layout condition.
Fig. 10 shows a block diagram of one example of an apparatus for optimizing the layout of a cylindrical antenna array (antenna layout optimization apparatus 1000) according to the present disclosure.
In the example shown in fig. 10, the cylindrical antenna array includes at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into several sub-arrays, each sub-array is arranged with transmitting array elements and receiving array elements which are separately arranged in transceiving, in each sub-array, all transmitting array elements are uniformly arranged into a transmitting array element sequence, all receiving array elements are uniformly arranged into a receiving array element sequence, the transmitting array element sequence is orthogonal to the receiving array element sequence, and arranged in the middle of the sub-array in a row and column manner.
As shown in fig. 10, the antenna layout optimization apparatus 1000 includes: a first layout condition determining unit 1010, a second layout condition determining unit 1020, an element determining unit 1030, a fourth layout condition determining unit 1040, a quantitative value determining unit 1050, and an antenna layout unit 1060.
The first layout condition determining unit 1010 may be configured to determine, as the first antenna array layout condition, for each cylindrical antenna array, that the expression of the number of equivalent phase centers in the cylindrical antenna array is not less than a threshold of a sampling point, where the threshold of the sampling point is determined according to a height and a horizontal included angle of a cylinder to which the cylindrical antenna array belongs, and a threshold of a horizontal included angle of an array element and a threshold of a height of the array element.
The second layout condition determining unit 1020 may be configured to determine, as the second antenna array layout condition, the minimum sum of the numbers of transmit array elements and receive array elements in each subarray to be solved.
The element determining unit 1030 may be configured to determine a first transmitting element and a first receiving element which are farthest from each sub-array.
A fourth layout condition determining unit 1040, which may be configured to determine that the coordinate difference between the first transmitting array element and the first receiving array element is not greater than the aperture irradiation range threshold as a fourth antenna array layout condition;
a quantity value determining unit 1050 configured to determine a first quantity value of the transmitting array elements and a second quantity value of the receiving array elements in each sub-array according to the first antenna array layout condition, the second antenna array layout condition, and the fourth antenna array layout condition; and
the antenna layout unit 1060 may be configured to lay out the respective cylindrical antenna arrays according to the first and second quantitative values.
Embodiments of methods and apparatus for optimizing the layout of a cylindrical antenna array according to the present disclosure are described above with reference to fig. 1 through 10.
The apparatus for optimally laying out a cylindrical antenna array of the present disclosure may be implemented in hardware, or may be implemented in software, or a combination of hardware and software. In the case of software implementation, as a logical means, the device is formed by reading corresponding computer program instructions in the memory into the memory for operation through the processor of the device in which the device is located. In the present disclosure, the means for optimizing the layout of a cylindrical antenna array may be implemented, for example, with an electronic device.
Fig. 11 illustrates a block diagram of an electronic device 1100 for implementing a method for cylindrical antenna array layout optimization of an embodiment of the present disclosure.
As shown in fig. 11, electronic device 1100 may include at least one processor 1110, a memory (e.g., non-volatile storage) 1120, a memory 1130, and a communication interface 1140, and the at least one processor 1110, memory 1120, memory 1130, and communication interface 1140 may be connected together via a bus 1150. The at least one processor 1110 executes at least one computer-readable instruction (i.e., the elements described above as being implemented in software) stored or encoded in memory.
In one embodiment, computer-executable instructions are stored in the memory that, when executed, cause the at least one processor 1110 to: for each cylindrical antenna array, determining that the number expression of equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold value as a first antenna array layout condition; determining the minimum sum of the number of the transmitting array elements and the number of the receiving array elements in each subarray to be solved as a second antenna array layout condition; determining a first transmitting array element and a first receiving array element which are farthest from each other in each subarray; determining a phase error corresponding to the distance error according to a first signal propagation distance between a first transmitting array element and a first receiving array element and a second signal propagation distance of an equivalent phase center determined by the first transmitting array element and the first receiving array element; determining that the phase error is not greater than the phase error threshold as a third antenna array layout condition; determining a first numerical value of a transmitting array element and a second numerical value of a receiving array element in each subarray according to the first antenna array layout condition, the second antenna array layout condition and the third antenna array layout condition; and laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
It should be understood that the computer-executable instructions stored in the memory, when executed, cause the at least one processor 1110 to perform the various operations and functions described above in connection with fig. 1-10 in the various embodiments of the present disclosure.
According to one embodiment, a program product, such as a machine-readable medium, is provided. A machine-readable medium may have instructions (i.e., elements described above as being implemented in software) that, when executed by a machine, cause the machine to perform various operations and functions described above in connection with fig. 1-10 in various embodiments of the present disclosure.
Fig. 12 shows a block diagram of an electronic device 1200 for implementing a cylindrical antenna array layout optimization method of an embodiment of the present disclosure.
As shown in fig. 12, the electronic device 1200 may include at least one processor 1210, a memory (e.g., non-volatile storage) 1220, a memory 1230, and a communication interface 1240, and the at least one processor 1210, the memory 1220, the memory 1230, and the communication interface 1240 are connected together via a bus 1250. The at least one processor 1210 executes at least one computer-readable instruction (i.e., the elements described above as being implemented in software) stored or encoded in memory.
In one embodiment, computer-executable instructions are stored in the memory that, when executed, cause the at least one processor 1210 to: for each cylindrical antenna array, determining that the number expression of equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold value as a first antenna array layout condition; determining the minimum sum of the number of the transmitting array elements and the number of the receiving array elements in each subarray to be solved as a second antenna array layout condition; determining a first transmitting array element and a first receiving array element which are farthest from each other in each subarray; determining that the coordinate difference between the first transmitting array element and the first receiving array element is not greater than the aperture irradiation range threshold as a fourth antenna array layout condition; determining a first numerical value of a transmitting array element and a second numerical value of a receiving array element in each subarray according to the first antenna array layout condition, the second antenna array layout condition and the fourth antenna array layout condition; and laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
It should be understood that the computer-executable instructions stored in the memory, when executed, cause the at least one processor 1210 to perform the various operations and functions described above in connection with fig. 1-10 in the various embodiments of the present disclosure.
Specifically, a system or apparatus may be provided which is provided with a readable storage medium on which software program code implementing the functions of any of the above embodiments is stored, and causes a computer or processor of the system or apparatus to read out and execute instructions stored in the readable storage medium.
In this case, the program code itself read from the readable medium can realize the functions of any of the above-described embodiments, and thus the machine-readable code and the readable storage medium storing the machine-readable code form part of the present invention.
Computer program code required for operation of portions of the present disclosure may be written in any one or more programming languages, including an object oriented programming language such as Java, scala, smalltalk, eiffel, JADE, emerald, C + +, C #, VB, NET, python, and the like, a conventional programming language such as C, visual Basic 2003, perl, COBOL2002, PHP, and ABAP, a dynamic programming language such as Python, ruby, and Groovy, or other programming languages, and the like. The program code may execute on the user's computer, or on the user's computer as a stand-alone software package, or in part on the user's computer and in part on a remote computer, or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any network format, such as a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet), or in a cloud computing environment, or as a service, such as a software as a service (SaaS).
Examples of the readable storage medium include floppy disks, hard disks, magneto-optical disks, optical disks (e.g., CD-ROMs, CD-R, CD-RWs, DVD-ROMs, DVD-RAMs, DVD-RWs), magnetic tapes, nonvolatile memory cards, and ROMs. Alternatively, the program code may be downloaded from a server computer or from the cloud via a communications network.
The foregoing description of specific embodiments of the present disclosure has been described. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Not all steps and elements in the above flows and system structure diagrams are necessary, and some steps or elements may be omitted according to actual needs. The execution order of the steps is not fixed, and can be determined as required. The apparatus structures described in the above embodiments may be physical structures or logical structures, that is, some units may be implemented by the same physical entity, or some units may be implemented by a plurality of physical entities, or some units may be implemented by some components in a plurality of independent devices.
The term "exemplary" used throughout this disclosure means "serving as an example, instance, or illustration," and does not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described embodiments.
Alternative embodiments of the present disclosure are described in detail with reference to the drawings, however, the embodiments of the present disclosure are not limited to the specific details in the embodiments, and various simple modifications may be made to the technical solutions of the embodiments of the present disclosure within the technical concept of the embodiments of the present disclosure, and the simple modifications all belong to the protective scope of the embodiments of the present disclosure.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (13)
1. A method for optimizing the layout of a cylindrical antenna array, wherein the cylindrical antenna array comprises at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into a plurality of sub-arrays, each sub-array is provided with a transmitting array element and a receiving array element which are separately arranged,
in each subarray, all transmitting array elements are uniformly arranged into a transmitting array element sequence, all receiving array elements are uniformly arranged into a receiving array element sequence, the transmitting array element sequence is intersected with the receiving array element sequence and arranged in the middle of the subarray in a row and column mode,
the method comprises the following steps:
for each cylindrical antenna array, determining that the number expression of equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold as a first antenna array layout condition, wherein the sampling point threshold is determined according to the height and horizontal included angle of a cylindrical surface to which the cylindrical antenna array belongs, and an array element horizontal included angle threshold and an array element height threshold;
determining the minimum sum of the number of the transmitting array elements and the number of the receiving array elements in each subarray to be solved as a second antenna array layout condition;
determining a first transmitting array element and a first receiving array element which are farthest from each other in each subarray;
determining a phase error corresponding to the distance error according to a first signal propagation distance between the first transmitting array element and the first receiving array element and a second signal propagation distance of an equivalent phase center determined by the first transmitting array element and the first receiving array element;
determining that the phase error is not greater than a phase error threshold as a third antenna array layout condition;
determining a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each subarray according to the first antenna array layout condition, the second antenna array layout condition and the third antenna array layout condition; and
and laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
2. The method of claim 1, wherein no array element is provided at the intersection where the transmit array element sequence and the receive array element sequence are intersecting.
3. The method of claim 1, wherein a transmitting array element or a receiving array element is arranged at an intersection position where the transmitting array element sequence and the receiving array element sequence are intersected.
4. The method of claim 1, wherein the transmit array element sequences are arranged as rows and the receive array element sequences are arranged as columns; or,
the transmitting array element sequence is arranged as a column, and the receiving array element sequence is arranged as a row.
5. The method of claim 1, wherein determining a phase error corresponding to a distance error based on a first signal propagation distance between the first transmit array element and the first receive array element and a second signal propagation distance of an equivalent phase center determined by the first transmit array element and the first receive array element comprises:
calculating a first signal propagation distance between the first transmitting array element and the first receiving array element and a target space point;
calculating a second signal propagation distance between the equivalent phase center determined by the first transmitting array element and the first receiving array element and the target space point;
determining a range error from the first signal propagation distance and the second signal propagation distance; and
and obtaining a phase error corresponding to the distance error according to the relation between the distance and the phase.
6. The method of claim 1, further comprising:
determining that the coordinate difference between the first transmitting array element and the first receiving array element is not greater than an aperture irradiation range threshold as a fourth antenna array layout condition; and
determining a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each sub-array according to the first antenna array layout condition, the second antenna array layout condition and the third antenna array layout condition comprises:
and determining a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each sub-array according to the first antenna array layout condition, the second antenna array layout condition, the third antenna array layout condition and the fourth antenna array layout condition.
7. The method of claim 6, wherein determining that the coordinate difference of the first transmit and first receive elements is not greater than an aperture illumination range threshold as a fourth antenna array layout condition comprises:
determining a horizontal included angle difference between the first transmitting array element and the first receiving array element, which is not larger than a horizontal included angle threshold value in an aperture irradiation range, as a first sub-condition;
determining a second sub-condition that a height difference between the first transmitting array element and the first receiving array element in a vertical direction is not more than a height threshold value in an aperture irradiation range; and
combining the first and second sub-conditions into a fourth antenna array layout condition.
8. A method for optimizing the layout of a cylindrical antenna array, wherein the cylindrical antenna array comprises at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into a plurality of sub-arrays, each sub-array is provided with a transmitting array element and a receiving array element which are separately arranged,
in each subarray, all transmitting array elements are uniformly arranged into a transmitting array element sequence, all receiving array elements are uniformly arranged into a receiving array element sequence, the transmitting array element sequence is intersected with the receiving array element sequence and arranged in the middle of the subarray in a row and column mode,
the method comprises the following steps:
for each cylindrical antenna array, determining that the number expression of equivalent phase centers in the cylindrical antenna array is not less than a sampling point threshold as a first antenna array layout condition, wherein the sampling point threshold is determined according to the height and horizontal included angle of a cylindrical surface to which the cylindrical antenna array belongs, and an array element horizontal included angle threshold and an array element height threshold;
determining the minimum sum of the quantity of the transmitting array elements and the quantity of the receiving array elements in each subarray to be solved as a second antenna array layout condition;
determining a first transmitting array element and a first receiving array element which are farthest from each other in each subarray;
determining that the coordinate difference between the first transmitting array element and the first receiving array element is not greater than an aperture irradiation range threshold as a fourth antenna array layout condition;
determining a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each subarray according to the first antenna array layout condition, the second antenna array layout condition and the fourth antenna array layout condition; and
and laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
9. An apparatus for optimizing the layout of a cylindrical antenna array, wherein the cylindrical antenna array comprises at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into a plurality of sub-arrays, each sub-array is provided with a transmitting array element and a receiving array element which are separately arranged,
in each subarray, all transmitting array elements are uniformly arranged into a transmitting array element sequence, all receiving array elements are uniformly arranged into a receiving array element sequence, the transmitting array element sequence is intersected with the receiving array element sequence and arranged in the middle of the subarray in a row and column mode,
the device comprises:
the first layout condition determining unit determines that the number expression of equivalent phase centers in each cylindrical antenna array is not less than a sampling point threshold value as a first antenna array layout condition, wherein the sampling point threshold value is determined according to the height and horizontal included angle of a cylindrical surface to which the cylindrical antenna array belongs, and the array element horizontal included angle threshold value and the array element height threshold value;
the second layout condition determining unit determines the minimum sum of the number of the transmitting array elements and the number of the receiving array elements in each sub-array to be solved as a second antenna array layout condition;
an array element determining unit for determining a first transmitting array element and a first receiving array element which are farthest from each subarray;
a phase error determination unit, configured to determine a phase error corresponding to a distance error according to a first signal propagation distance between the first transmitting array element and the first receiving array element and a second signal propagation distance of an equivalent phase center determined by the first transmitting array element and the first receiving array element;
a third layout condition determining unit that determines, as a third antenna array layout condition, that the phase error is not greater than a phase error threshold;
a quantity value determining unit, configured to determine a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each sub-array according to the first antenna array layout condition, the second antenna array layout condition, and the third antenna array layout condition; and
and the antenna layout unit is used for laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
10. An apparatus for optimizing the layout of a cylindrical antenna array, wherein the cylindrical antenna array comprises at least one cylindrical antenna array, each cylindrical antenna array is uniformly divided into a plurality of sub-arrays, each sub-array is provided with a transmitting array element and a receiving array element which are separately arranged,
in each subarray, all transmitting array elements are uniformly arranged into a transmitting array element sequence, all receiving array elements are uniformly arranged into a receiving array element sequence, the transmitting array element sequence is intersected with the receiving array element sequence and is arranged in the middle of the subarray in a row and column mode,
the device comprises:
the first layout condition determining unit determines that the number expression of equivalent phase centers in each cylindrical antenna array is not less than a sampling point threshold value as a first antenna array layout condition, wherein the sampling point threshold value is determined according to the height and horizontal included angle of a cylindrical surface to which the cylindrical antenna array belongs, and the array element horizontal included angle threshold value and the array element height threshold value;
the second layout condition determining unit determines the minimum sum of the number of the transmitting array elements and the number of the receiving array elements in each sub-array to be solved as a second antenna array layout condition;
an array element determining unit for determining a first transmitting array element and a first receiving array element which are farthest from each subarray;
a fourth layout condition determining unit, configured to determine that a coordinate difference between the first transmit array element and the first receive array element is not greater than an aperture irradiation range threshold as a fourth antenna array layout condition;
a quantity value determining unit, configured to determine a first quantity value of a transmitting array element and a second quantity value of a receiving array element in each sub-array according to the first antenna array layout condition, the second antenna array layout condition, and the fourth antenna array layout condition; and
and the antenna layout unit is used for laying out each cylindrical antenna array according to the first numerical value and the second numerical value.
11. An electronic device, comprising: at least one processor, a memory coupled with the at least one processor, and a computer program stored on the memory, the at least one processor executing the computer program to implement the method of any of claims 1-8.
12. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-8.
13. A computer program product comprising a computer program which, when executed by a processor, implements the method of any one of claims 1-8.
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