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1. 发明授权

US09978013B2 Systems and methods for recognizing objects in radar imagery 有权
公开(公告)号：US09978013B2
公开(公告)日：2018-05-22
申请号：US14794376
申请日：2015-07-08
申请人： Deep Learning Analytics, LLC
发明人： John Patrick Kaufhold
IPC分类号： G01S13/90 , G06N3/04 , G01S7/41
CPC分类号： G06N3/0454 , G01S7/417 , G01S13/90 , G01S13/9035
摘要： The present invention is directed to systems and methods for detecting objects in a radar image stream. Embodiments of the invention can receive a data stream from radar sensors and use a deep neural network to convert the received data stream into a set of semantic labels, where each semantic label corresponds to an object in the radar data stream that the deep neural network has identified. Processing units running the deep neural network may be collocated onboard an airborne vehicle along with the radar sensor(s). The processing units can be configured with powerful, high-speed graphics processing units or field-programmable gate arrays that are low in size, weight, and power requirements. Embodiments of the invention are also directed to providing innovative advances to object recognition training systems that utilize a detector and an object recognition cascade to analyze radar image streams in real time. The object recognition cascade can comprise at least one recognizer that receives a non-background stream of image patches from a detector and automatically assigns one or more semantic labels to each non-background image patch. In some embodiments, a separate recognizer for the background analysis of patches may also be incorporated. There may be multiple detectors and multiple recognizers, depending on the design of the cascade. Embodiments of the invention also include novel methods to tailor deep neural network algorithms to successfully process radar imagery, utilizing techniques such as normalization, sampling, data augmentation, foveation, cascade architectures, and label harmonization.

2. 发明授权

US09880277B2 Synthetic aperture radar processing 有权
公开(公告)号：US09880277B2
公开(公告)日：2018-01-30
申请号：US14702272
申请日：2015-05-01
申请人： Chad P. Knight , Jacob H. Gunther
发明人： Chad P. Knight , Jacob H. Gunther
IPC分类号： G01S13/90 , G01S7/02 , G01S7/35
CPC分类号： G01S13/90 , G01S7/023 , G01S13/9035 , G01S2007/358 , G01S2013/9052
摘要： For synthetic aperture radar (SAR) processing, a SAR receives a plurality of SAR signals. The SAR generates a piecewise approximation of the plurality of SAR signals over a coherent processing interval. The piecewise approximation may mitigate phase reflection components of each SAR signal. The SAR further generates an estimate of the scene from the piecewise approximation.

3. 发明授权

US09702971B2 High-availability ISAR image formation 有权
公开(公告)号：US09702971B2
公开(公告)日：2017-07-11
申请号：US14215737
申请日：2014-03-17
申请人： RAYTHEON COMPANY
发明人： Benjamin Mitchell , Andrew J. Patterson , Raymond Samaniego
IPC分类号： G01S13/90 , G01S7/288
CPC分类号： G01S13/9035 , G01S7/288 , G01S2007/2883 , G01S2013/9064
摘要： A system and method for high-availability inverse synthetic aperture radar (ISAR). In one embodiment a set of quadratic phase vectors, each corresponding to a different acceleration, is multiplied, one at a time, in a Hadamard product, with a 3-dimensional data cube, and a fast Fourier transform (FFT) is taken of the result, to form a 2-dimensional array. The two-dimensional array is made sparse by setting to zero elements that fall below a threshold based on a coherency metric, and the sparse arrays are stacked to form a sparse 3-dimensional image. Projections of the sparse 3-dimensional image are formed for presentation to an operator or an image exploitation system.

4. 发明授权

US09696422B2 Synthetic aperture radar system 有权
公开(公告)号：US09696422B2
公开(公告)日：2017-07-04
申请号：US14399532
申请日：2013-05-08
申请人： THE SECRETARY OF STATE FOR DEFENCE
发明人： Darren George Muff
IPC分类号： G01S13/90
CPC分类号： G01S13/9035 , G01S13/90 , G01S2013/9058
摘要： Low cost, generally broad bandwidth synthetic aperture radar systems are detailed. The systems may be bistatic and include analog to digital converters in ground based receivers while transmitters and analogoue repeaters may be space-borne or airborne. Methods of producing synthetic aperture radar images also are detailed.

5. 发明授权

US09417324B2 Phase reference shift for SAR images generated from sub-aperture algorithms 有权
标题翻译：从子孔径算法生成的SAR图像的相位参考偏移
公开(公告)号：US09417324B2
公开(公告)日：2016-08-16
申请号：US14180700
申请日：2014-02-14
申请人： RAYTHEON COMPANY
发明人： Michael Y. Jin
IPC分类号： G01S13/90
CPC分类号： G01S13/9035 , G01S13/90
摘要： Embodiments are directed to generating a plurality of sub-images associated with a target via a synthetic aperture radar, processing, by a processor, the sub-images using a sub-aperture algorithm to generate an intermediate image, and applying, by the processor, a phase shift to the intermediate image to generate an output image.
摘要翻译：实施例涉及通过合成孔径雷达生成与目标相关联的多个子图像，由处理器使用子孔径算法处理子图像以生成中间图像，以及由处理器应用，相移到中间图像以产生输出图像。

6. 发明申请

US20160216372A1 System and Method for 3D Imaging using Compressive Sensing with Hyperplane Multi-Baseline Data 审中-公开
标题翻译：使用超平面多基线数据的压缩感知的3D成像系统和方法
公开(公告)号：US20160216372A1
公开(公告)日：2016-07-28
申请号：US14603460
申请日：2015-01-23
申请人： Mitsubishi Electric Research Laboratories, Inc.
发明人： Dehong Liu , Petros Boufounos
IPC分类号： G01S13/90 , G06T15/00
CPC分类号： G01S13/9035
摘要： A method and system generates a three-dimensional (3D) image by first acquiring data from a scene using multiple parallel baselines and multiple different pulse repetition frequencies (PRF), wherein the multiple baselines are arranged in a hyperplane. Then, a 3D compressive sensing reconstruction procedure is applied to the data to generate the 3D image corresponding to the scene.
摘要翻译：方法和系统通过首先使用多个并行基线和多个不同的脉冲重复频率（PRF）从场景获取数据来生成三维（3D）图像，其中多个基线被布置在超平面中。然后，将3D压缩感测重建程序应用于数据以生成与场景相对应的3D图像。

7. 发明授权

US09335410B2 System and method for multiple spotlight synthetic radar imaging using random beam steering 有权
标题翻译：使用随机光束转向的多聚光灯综合雷达成像系统和方法
公开(公告)号：US09335410B2
公开(公告)日：2016-05-10
申请号：US13770096
申请日：2013-02-19
申请人： Mitsubishi Electric Research Laboratories, Inc.
发明人： Dehong Liu , Petros Boufounos
IPC分类号： G01S13/89 , G01S13/90
CPC分类号： G01S13/9035 , G01S2013/9052
摘要： A spotlight synthetic aperture radar (SAR) image is generated by directing randomly a beam of transmitted pulses at a set of two or more areas using a steerable array of antennas. Each area is illuminated by an approximately equal number of the transmitted pulses. Then, a reconstruction procedure is applied independently to received signals from each area due to reflecting the transmitted pulses to generate the image corresponding to the set of areas.
摘要翻译：聚光灯合成孔径雷达（SAR）图像是通过使用可导向的天线阵列在两个或更多个区域的集合上随机引导发送的脉冲的波束来产生的。每个区域被大致相等数量的发射脉冲照亮。然后，由于反映所发送的脉冲而产生与该组区域对应的图像，因此独立地对来自每个区域的接收信号应用重建程序。

8. 发明授权

US09329264B2 SAR image formation 有权
标题翻译： SAR图像形成
公开(公告)号：US09329264B2
公开(公告)日：2016-05-03
申请号：US13768046
申请日：2013-02-15
申请人： RAYTHEON COMPANY
发明人： Michael Y. Jin
IPC分类号： G01S13/90 , G01S13/524 , G01S13/00 , G01S7/288
CPC分类号： G01S13/9035 , G01S13/5242 , G01S13/90 , G01S2007/2883 , G01S2007/2886
摘要： SAR imaging method that includes applying PRF decimation to range-compressed IQ data to generate PRF-decimated range-compressed IQ data for each image block of an image and applying motion compensation to the PRF-decimated range-compressed IQ data to generate motion-compensated data for each image block. The method includes computing first stage image values at image grid point intersections of iso-range lines and vertical grid lines for each image bock based on the motion-compensated data for each image block. The method also includes computing second stage image values for the image grid point intersections by interpolation using the first stage image values at the image grid point intersections and correcting image phase of the second stage image values for the image grid point intersections to generate phase-corrected image values for each image block. The method includes generating a full-resolution SAR image by summing the phase-corrected image values for each image block.
摘要翻译： SAR成像方法包括将PRF抽取应用于范围压缩的IQ数据，以生成图像的每个图像块的PRF抽取的范围压缩的IQ数据，并将运动补偿应用于PRF抽取的范围压缩的IQ数据以产生运动补偿每个图像块的数据。该方法包括基于每个图像块的运动补偿数据计算每个图像块的等距线和垂直网格线的图像网格点交点处的第一阶段图像值。该方法还包括通过使用图像网格点交叉点处的第一级图像值进行插值并针对图像网格点交叉点校正第二级图像值的图像相位来计算图像网格点交点的第二级图像值，以生成相位校正每个图像块的图像值。该方法包括通过对每个图像块的相位校正图像值求和来产生全分辨率SAR图像。

9. 发明授权

US09316734B2 Free-hand scanning and imaging 有权
标题翻译：自由扫描和成像
公开(公告)号：US09316734B2
公开(公告)日：2016-04-19
申请号：US14058395
申请日：2013-10-21
申请人： Joseph T. Case , Mohammad Tayeb Ghasr , Reza Zoughi
发明人： Joseph T. Case , Mohammad Tayeb Ghasr , Reza Zoughi
IPC分类号： G01S13/90 , G01S13/88 , G01V3/12 , G01S15/89
CPC分类号： G01S13/9035 , G01S13/88 , G01S13/885 , G01S13/887 , G01S13/888 , G01S13/90 , G01S15/8904 , G01V3/12
摘要： Wideband synthetic aperture radar (SAR) imaging. A probe transmits a signal through its aperture incident to an object located in a medium of interest remotely from the probe. The probe receives through the aperture a plurality of nonuniformly sampled reflected signals from the object as the probe moves in a measurement plane located a predetermined distance from the object. A processor executes a SAR-based reconstruction algorithm to generate an image.
摘要翻译：宽带合成孔径雷达（SAR）成像。探头通过其孔径将探测器远端的信号传输到位于感兴趣的介质中的物体。当探头在距物体预定距离的测量平面中移动时，探头通过孔径接收来自物体的多个不均匀采样的反射信号。处理器执行基于SAR的重建算法来生成图像。

10. 发明授权

US09261593B1 Higher order processing for synthetic aperture radar (SAR) 有权
标题翻译：合成孔径雷达（SAR）的高阶处理
公开(公告)号：US09261593B1
公开(公告)日：2016-02-16
申请号：US13799837
申请日：2013-03-13
申请人： Lockheed Martin Corporation
发明人： Paul D. Mountcastle , Svetlana M. Bachmann
IPC分类号： G01S7/292 , G01S7/41 , G01S13/56 , G01S13/90
CPC分类号： G01S7/292 , G01S7/41 , G01S7/411 , G01S7/412 , G01S7/415 , G01S13/56 , G01S13/9029 , G01S13/9035 , G01S2013/9088
摘要： A method for processing received return signals in a visual synthetic aperture radar (ViSAR) system is provided. The method includes receiving a plurality of pulsed radar return signals over a time period corresponding to a plurality of data frames. From this data, processing is performed to generate a SAR image for each single data frame of the plurality of data frames. In parallel, the radar pulses used to form the image frames are buffered into a longer pulse sequence that is used to perform the detection processing, including identifying targets as having characteristics associated with one or more predetermined motion classes according to phase changes sensed between data frames. A visual indication of targets associated with a predetermined motion class is generated, and overlaid onto one of the SAR images.
摘要翻译：提供了一种在视觉合成孔径雷达（ViSAR）系统中处理接收到的返回信号的方法。该方法包括在对应于多个数据帧的时间段内接收多个脉冲雷达返回信号。根据该数据，执行处理，以生成多个数据帧中的每个单个数据帧的SAR图像。并行地，用于形成图像帧的雷达脉冲被缓冲到用于执行检测处理的较长脉冲序列中，包括根据在数据帧之间感测到的相位变化将目标识别为具有与一个或多个预定运动类别相关联的特性。产生与预定运动类别相关联的目标的视觉指示，并且覆盖在一个SAR图像上。

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