[특허]System and method for partitioning acquisition volumes using rotated covariance

Lockheed Martin Corporation

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

System and method for partitioning acquisition volumes using rotated covariance

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01S-013/72
미국특허분류(USC)	342/095; 342/175
출원번호	US-0346341 (2012-01-09)
등록번호	US-8912947 (2014-12-16)
발명자 / 주소	Friesel, Mark A. Thorpe, Juma M.
출원인 / 주소	Lockheed Martin Corporation
대리인 / 주소	Howard IP Law Group, PC
인용정보	피인용 횟수 : 2 인용 특허 : 11

초록
▼

A method for searching a radar acquisition volume after rotating the radar acquisition volume is disclosed. The method may comprise identifying an acquisition face of the acquisition volume and partitioning the acquisition face so that each partitioned portion of the acquisition face can be searched within a predetermined time period. The partitioning step may comprise determining the maximum number of beams that can be searched in a predetermined period of time and iteratively repositioning an elevation line on the acquisition face to identify the highest elevation line for which the number of radar beams is less than or equal to the maximum number of beams. The partitioning step may also comprise defining a beam lattice for the acquisition face and determining a maximum elevation line based on the beam lattice. The area of the acquisition face bounded by the highest or maximum elevation line defines the partitioned portion.

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청구항
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1. A method for searching a radar acquisition volume, comprising: receiving, by a communications unit, the radar acquisition volume;identifying, by a command and decision unit, an acquisition face of the acquisition volume;rotating the acquisition face by a rotation angle;partitioning, by the command and decision unit, the rotated acquisition face by: determining a maximum number of beams that can be searched in a predetermined time period;selecting an elevation line of the rotated acquisition face;determining a first number of radar beams that can be placed on the rotated acquisition face under the selected elevation line;comparing the first number of radar beams to the maximum number of radar beams;iteratively repositioning the selected elevation line to identify a highest elevation line for which the first number of radar beams is less than or equal to the maximum number of beams;wherein an area of the rotated acquisition face bounded by the highest elevation line defines a partitioned portion; andgenerating, by a radar beam controller, a search of each partitioned portion. 2. The method of claim 1, wherein rotating the acquisition face by a rotation angle comprises rotating the acquisition face so that an axis of the acquisition face is aligned with an axis of a viewplane. 3. The method of claim 1, wherein partitioning the rotated acquisition face comprises partitioning the rotated acquisition face into partitioned portions in which each partitioned portion is searchable within a predetermined time period. 4. The method of claim 1, further comprising identifying a next partitioned portion if the highest elevation line is below the maximum elevation of the rotated acquisition face. 5. The method of claim 4, further comprising setting the highest elevation line of the partitioned portion as the minimum elevation line of the next partitioned portion. 6. A method for searching a radar acquisition volume, comprising: receiving, by a communications unit, the radar acquisition volume;identifying, by a command and decision unit, an acquisition face of the acquisition volume;rotating the acquisition face by a rotation angle;partitioning, by the command and decision unit, the rotated acquisition face by: determining a maximum number of beams that can be searched in a predetermined time period;defining a beam lattice for the rotated acquisition face;calculating beam center elevations for each beam in the beam lattice; andidentifying, based on the beam center elevations, a maximum elevation line that uses a number of beams less than or equal to the maximum number of beams that can be searched in the predetermined time period,wherein an area of the rotated acquisition face bounded by the maximum elevation line defines a partitioned portion; andgenerating, by a radar beam controller, a search of each partitioned portion. 7. The method of claim 6, wherein partitioning the rotated acquisition face further comprises: determining a maximum and minimum elevation of the partitioned portion;determining an elevation and azimuth extent of the partitioned portion; anddetermining center coordinates of the partitioned portion. 8. The method of claim 6, further comprising determining a next partitioned portion if the highest elevation line is below the maximum elevation of the rotated acquisition face. 9. The method of claim 8, further comprising setting the highest elevation line of the partitioned portion as the minimum elevation line of the rotated acquisition face before determining the next partitioned portion. 10. The method of claim 6, wherein calculating beam center elevations for each beam comprises determining the distance of each beam center from a line sloped at the rotation angle. 11. The method of claim 6, wherein Np is the maximum number of beams that can be searched in a predetermined time period; andwherein determining, based on the beam center elevations, a maximum elevation line comprises:sorting the beam center elevations; andidentifying the elevation line associated with Npth element of the sorted beam center elevations as the maximum elevation line. 12. A radar system for searching a radar acquisition volume comprising: a command and decision unit configured to: identify an acquisition face of the acquisition volume;rotate the acquisition face by a rotation angle; andpartition the rotated acquisition face into partitioned portions in which each partitioned portion is searchable within a predetermined time period by: determining a maximum number of beams that can be searched in the predetermined time period;selecting an elevation line of the rotated acquisition face;determining a first number of radar beams that can be placed on the rotated acquisition face under the selected elevation line;comparing the first number of radar beams to the maximum number of radar beams; anditeratively repositioning the selected elevation line to identify a highest elevation line for which the first number of radar beams is less than or equal to the maximum number of beams;wherein an area of the rotated acquisition face bounded by the highest elevation line defines the partitioned portion;and a radar beam controller configured to generate a search of each partitioned portion. 13. The radar system of claim 12, wherein the command and decision unit being configured to rotate the acquisition face comprises the command and decision unit being configured to rotate the acquisition face so that an axis of the acquisition face is aligned with an axis of a viewplane. 14. The radar system of claim 12, further comprising a communications unit configured to receive the radar acquisition volume. 15. The radar system of claim 12, wherein the command and decision unit is further configured to determine a next partitioned portion if the highest elevation line is below the maximum elevation of the rotated acquisition face. 16. The radar system of claim 12, wherein the command and decision unit is further configured to set the highest elevation line of the partitioned portion as the minimum elevation line of the rotated acquisition face before determining the next partitioned portion. 17. A radar system for searching a radar acquisition volume comprising: a command and decision unit configured to: identify an acquisition face of the acquisition volume;rotate the acquisition face by a rotation angle; andpartition the rotated acquisition face into partitioned portions in which each partitioned portion is searchable within a predetermined time period by: determining a maximum number of beams that can be searched in the predetermined time period;defining a beam lattice for the rotated acquisition face;calculating beam center elevations for each beam in the beam lattice; andidentifying, based on the beam center elevations, a maximum elevation line that uses a number of beams less than or equal to the maximum number of beams that can be searched in a predetermined time period,wherein an area of the rotated acquisition face bounded by the maximum elevation line defines the partitioned portion;anda radar beam controller configured to generate a search of each partitioned portion. 18. The radar system of claim 17, wherein the command and decision unit being configured to partition the rotated acquisition face further comprises the command and decision unit being configured to: determine a maximum and minimum elevation of the partitioned portion;determine an elevation and azimuth extent of the partitioned portion; anddetermine center coordinates of the partitioned portion. 19. The radar system of claim 17, wherein the command and decision unit is further configured to: determine a next partitioned portion if the highest elevation line is below the maximum elevation of the rotated acquisition face; andset the highest elevation line of the partitioned portion as the minimum elevation line of the rotated acquisition face before determining the next partitioned portion. 20. The radar system of claim 17, wherein Np is the maximum number of beams that can be searched in a predetermined time period; and wherein the command and decision unit being configured to identify, based on the beam center elevations, a maximum elevation line comprises the command and decision unit being configured to: sort the beam center elevations; andidentify the elevation line associated with Npth element of the sorted beam center elevations as the maximum elevation line.

이 특허에 인용된 특허 (11)

이 특허를 인용한 특허 피인용횟수: 2

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System and method for partitioning acquisition volumes using rotated covariance

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System and method for partitioning acquisition volumes using rotated covariance

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