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公开(公告)号：US20180306887A1
公开(公告)日：2018-10-25
申请号：US15492694
申请日：2017-04-20
Applicant: Raytheon Company
Inventor： Ian S. Robinson , Bradley A. Flanders , Daniel Kilfoyle
Abstract: Systems and methods for determining an angle of arrival (AoA) of a signal received from an emitters at a pair of antennas spaced apart by more than one half wavelength of the received signal. Features of the signal are determined, including a phase difference between signal components detected at the antennas, and a time difference of arrival (TDOA) having a known measurement error. A set of TDOA possibilities bounded by the known TDOA measurement error and a set of AoA estimates using phase interferometry (PI) within the range are calculated. The TDOA set is iteratively reduced to determine a precise AoA estimate for the emitter.
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公开(公告)号：US20180080826A1
公开(公告)日：2018-03-22
申请号：US15270942
申请日：2016-09-20
Applicant: RAYTHEON COMPANY
Inventor： John F. Silny , Bradley A. Flanders
CPC classification number: G01J3/2823 , G01J3/18 , G01J3/2803 , G01J2003/1204 , G01J2003/1273 , G01J2003/2826
Abstract: An imaging spectrometer and method are provided. In one example, the imaging spectrometer includes foreoptics positioned to receive electromagnetic radiation from a scene, a diffraction grating positioned to receive the electromagnetic radiation from the foreoptics and configured to disperse the electromagnetic radiation into a plurality of spectral bands, each spectral band corresponding to a diffraction grating order of the diffraction grating, and a single-band focal plane array configured to simultaneously receive from the diffraction grating overlapping spectra corresponding to at least two diffraction grating orders.
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公开(公告)号：US09123091B2
公开(公告)日：2015-09-01
申请号：US14107769
申请日：2013-12-16
Applicant: Raytheon Company
Inventor： Ian S. Robinson , Bradley A. Flanders
IPC: G06T9/00 , G06K9/00 , H04N19/15 , H04N19/186 , H04N19/154 , H04N19/192
CPC classification number: G06T9/00 , G06K9/00201 , H04N19/15 , H04N19/154 , H04N19/186 , H04N19/192
Abstract: Computer implemented methods for compressing 3D hyperspectral image data having a plurality of spatial pixels associated with a hyperspectral image, and a number of spectral dimensions associated with each spatial pixel, include receiving, using a processor, the 3D hyperspectral image data, a set of basis vectors associated therewith, and either a maximum error amount or a maximum data size. The methods also include partitioning the 3D hyperspectral image data into a plurality of 2D images, each associated with one of the number of spectral dimensions, and an associated one of the set of basis vectors. The methods additionally include ranking the set of basis vectors if not already ranked. The methods may further include iteratively applying lossy compression to the 2D images, in an order determined by the ranking. Other embodiments and features are also disclosed.
Abstract translation: 用于压缩具有与高光谱图像相关联的多个空间像素的3D高光谱图像数据以及与每个空间像素相关联的多个光谱维度的计算机实现的方法包括：使用处理器接收3D高光谱图像数据，一组基础 与其相关联的向量，以及最大误差量或最大数据大小。 所述方法还包括将3D高光谱图像数据分割成多个2D图像，每个2D图像与多个光谱维数中的一个相关联，以及该组向量中相关联的一个。 所述方法还包括如果尚未排名则对所述基本向量集进行排序。 该方法可以进一步包括以由排名确定的顺序对2D图像迭代地应用有损压缩。 还公开了其它实施例和特征。
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公开(公告)号：US10705177B2
公开(公告)日：2020-07-07
申请号：US15978718
申请日：2018-05-14
Applicant: RAYTHEON COMPANY
Inventor： Ian S. Robinson , Bradley A. Flanders
Abstract: A direction finding interferometer shares receivers among antennas and aperiodically switches between those antennas. The phase differences for a subset of the antenna pairs are measured for each pulse and the results are combined with the results from subsequent pulses to resolve ambiguities. An angle of arrival common to two subsets of angles of arrival is the unambiguous angle of arrival.
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公开(公告)号：US10422847B2
公开(公告)日：2019-09-24
申请号：US15492694
申请日：2017-04-20
Applicant: Raytheon Company
Inventor： Ian S. Robinson , Bradley A. Flanders , Daniel Kilfoyle
Abstract: Systems and methods for determining an angle of arrival (AoA) of a signal received from an emitters at a pair of antennas spaced apart by more than one half wavelength of the received signal. Features of the signal are determined, including a phase difference between signal components detected at the antennas, and a time difference of arrival (TDOA) having a known measurement error. A set of TDOA possibilities bounded by the known TDOA measurement error and a set of AoA estimates using phase interferometry (PI) within the range are calculated. The TDOA set is iteratively reduced to determine a precise AoA estimate for the emitter.
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Patent Agency Ranking
公开(公告)号：US10416269B2
公开(公告)日：2019-09-17
申请号：US15492712
申请日：2017-04-20
Applicant: Raytheon Company
Inventor： Ian S. Robinson , Bradley A. Flanders
Abstract: Methods and systems for determining an angle of arrival (AoA) of a RF emitter signal utilizing phase comparisons between pairs of antennas from among two closely spaced antenna elements and a third antenna element fixedly positioned more distant, and a combination of TDOA and PI techniques, to resolve PI ambiguities. Overlapping AoA ambiguity patterns with different angular spacings may be resolved by TDOA techniques. A span of TDOA AoA possibilities is obtained, centered at a solution to a TDOA angle calculation and bounded by a known TDOA measurement error range.
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公开(公告)号：US10153549B2
公开(公告)日：2018-12-11
申请号：US15062789
申请日：2016-03-07
Applicant: Raytheon Company
Inventor： Ian S. Robinson , Anton Horvath , Bradley A. Flanders
Abstract: Antenna systems and methods of detecting RF signals received from a field of view (FOV) are presented, employing intersecting fan beam pluralities formed by associated columns or rows of antenna elements and cross-correlation of components of the received radiation from the fan beam pluralities. The intersecting fan beams pluralities form pencil-like beams persistently spanning the FOV as desired. Angle(s) of arrival and frequency channels of incident RF signals may be determined through power estimation, ranking and filtering, and/or frequency channelization techniques. Higher sensitivity beams may be cued to more accurately characterize the incident signals.
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公开(公告)号：US10151632B2
公开(公告)日：2018-12-11
申请号：US15270942
申请日：2016-09-20
Applicant: RAYTHEON COMPANY
Inventor： John F. Silny , Bradley A. Flanders
Abstract: An imaging spectrometer and method are provided. In one example, the imaging spectrometer includes foreoptics positioned to receive electromagnetic radiation from a scene, a diffraction grating positioned to receive the electromagnetic radiation from the foreoptics and configured to disperse the electromagnetic radiation into a plurality of spectral bands, each spectral band corresponding to a diffraction grating order of the diffraction grating, and a single-band focal plane array configured to simultaneously receive from the diffraction grating overlapping spectra corresponding to at least two diffraction grating orders.
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公开(公告)号：US20170059684A1
公开(公告)日：2017-03-02
申请号：US14843346
申请日：2015-09-02
Applicant: RAYTHEON COMPANY
Inventor： Ian S. Robinson , Bradley A. Flanders
IPC: G01S3/32
CPC classification number: G01S3/32
Abstract: A system for determining a direction for an electromagnetic signal. The system includes a receiving array antenna, including a plurality of antenna elements, each antenna element having a position in the receiving array antenna; a digitizer configured to receive an analog signal from each of the antenna elements, and to sample and digitize each of the analog signals to form a sequence of digitized samples from each of the analog signals; and a processing unit. The processing unit is configured to receive the sequences of sample values from the digitizer; and, for each direction of a plurality of hypothesized directions: combine the sample values from the plurality of antenna elements to form a single time record; fit the single time record with a combination of one or more functions of time; and identify a direction at which a measure of the magnitude of the linear combination is greatest.
Abstract translation: 一种用于确定电磁信号的方向的系统。 该系统包括接收阵列天线，包括多个天线元件，每个天线元件具有在接收阵列天线中的位置; 数字转换器，被配置为从每个天线元件接收模拟信号，并且对每个模拟信号采样和数字化，以形成来自每个模拟信号的数字化采样序列; 和处理单元。 处理单元被配置为从数字化仪接收样本值的序列; 并且对于多个假设方向的每个方向：组合来自所述多个天线元件的采样值以形成单个时间记录; 适合单一时间记录与时间的一个或多个功能的组合; 并且识别线性组合的量值的度量最大的方向。
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公开(公告)号：US09213915B2
公开(公告)日：2015-12-15
申请号：US13837866
申请日：2013-03-15
Applicant: RAYTHEON COMPANY
Inventor： Anthony Sommese , Bradley A. Flanders , Ian S. Robinson
CPC classification number: G06K9/522 , G06K9/0063 , G06K9/48 , G06K9/623
Abstract: The disclosure provides a filtering engine for selecting a subset of hyperspectral imaging wavebands having information useful for detecting a target in a scene. Selecting these wavebands, called “sparse bands,” is an iterative process. One or more search techniques of varying computational complexity are used in the process. The techniques rely on various selection criteria, including a signal to clutter ratio that measures the “goodness” of band selection. A convenient example of the filtering engine uses several of the techniques together in a layered approach. In this novel approach, simpler computational techniques are applied, initially, to reduce a number of bands. More computationally intensive techniques then search the reduced band space. Accordingly, the filtering engine efficiently selects a set of sparse bands tailored for each target and each scene, and maintains some of the detection capability provided with a full set of wavebands.
Abstract translation: 本公开提供了一种用于选择具有用于检测场景中的目标的信息的高光谱成像波段的子集的滤波引擎。 称为“稀疏带”的这些波段是一个迭代过程。 在该过程中使用一种或多种具有不同计算复杂度的搜索技术。 这些技术依赖于各种选择标准，包括测量频带选择的“良好性”的信噪比。 过滤引擎的一个方便的示例使用分层方法在一起的几种技术。 在这种新颖的方法中，最初应用更简单的计算技术来减少多个频带。 然后更多的计算密集型技术搜索缩小的带隙。 因此，滤波引擎有效地选择为每个目标和每个场景定制的一组稀疏频带，并且保持提供有一整套波段的一些检测能力。
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