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1.发明申请公开(公告)号：US20170041571A1
公开(公告)日：2017-02-09
申请号：US14789601
申请日：2015-07-01
CPC分类号： H04N5/37455 , H04N5/335 , H04N7/18
摘要： Conventional methods for imaging transient targets are constrained by a trade-off between resolution and frame rate, and transient targets moving faster than the detector frame typically result in image blurring. Imagers using digital-pixel focal plane arrays (“DFPAs”) have on-chip global pixel operation capability for extracting a single transient-feature (i.e., single-frequency discrimination) in a snapshot that depends on the number of counters implemented per pixel. However, these DFPA systems are not capable of multi-target and multi-frequency discrimination. Imagers described herein achieve multi-target transient signature discrimination orders of magnitude faster than the readout frame rate using in-pixel electronic shuttering with a known time-encoded modulation. Three-dimensional (x,y,t) data cube reconstruction is performed using compressive sensing algorithms.
摘要翻译： 用于成像瞬态目标的常规方法受到分辨率和帧速率之间的折衷的约束，并且比检测器帧更快地移动的瞬态目标通常导致图像模糊。 使用数字像素焦平面阵列（“DFPAs”）的成像器具有片上全局像素操作能力，用于提取快照中的单个瞬态特征（即，单频识别），这取决于每像素实现的计数器的数量。 但是，这些DFPA系统无法进行多目标和多频率的区分。 本文描述的成像器使用具有已知时间编码调制的像素内快门功能来实现比使用读出帧速率更快的多目标瞬态签名识别数量级。 使用压缩感知算法执行三维（x，y，t）数据立方体重构。
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公开(公告)号：US20120176191A1
公开(公告)日：2012-07-12
申请号：US13227583
申请日：2011-09-08
申请人： Helen H. Kim , Merlin R. Green , Benjamin A. Miller , Andrew K. Bolstad , Andrew R. Chen , Daniel D. Santiago
发明人： Helen H. Kim , Merlin R. Green , Benjamin A. Miller , Andrew K. Bolstad , Andrew R. Chen , Daniel D. Santiago
IPC分类号： G06G7/12
CPC分类号： H03M1/1042 , H03F1/30 , H03F1/3205 , H03M1/002 , H03M1/0614 , H03M1/12
摘要： A method for digital compensation of a nonlinear system comprises identifying a plurality of circuit parameters of a nonlinear system. Each circuit parameter determines a nonlinear response of the nonlinear system. A first circuit parameter is chosen from the plurality of circuit parameters. The first circuit parameter determines a first effect on the nonlinear response. The first effect is at least as large a second effect from a second circuit parameter from the plurality of circuit parameters. At least one stimulus is applied to the nonlinear system. The nonlinear response of the nonlinear system is measured in response to the at least one stimulus. A compensation architecture is synthesized to substantially linearize the nonlinear response. The compensation architecture receives the nonlinear response of the nonlinear system and provides a substantially linear response.
摘要翻译： 一种用于非线性系统的数字补偿的方法包括识别非线性系统的多个电路参数。 每个电路参数决定非线性系统的非线性响应。 从多个电路参数中选择第一电路参数。 第一个电路参数决定了对非线性响应的第一个影响。 第一效果是来自多个电路参数的第二电路参数至少具有大的第二效果。 至少一个刺激被应用于非线性系统。 非线性系统的非线性响应是响应于至少一个刺激来测量的。 合成补偿架构以使非线性响应基本线性化。 补偿架构接收非线性系统的非线性响应并提供基本上线性的响应。
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公开(公告)号：US20180083816A1
公开(公告)日：2018-03-22
申请号：US15811905
申请日：2017-11-14
CPC分类号： H04L27/265 , G01S3/74 , H01Q21/0025 , H04B1/0025 , H04B7/0617 , H04L27/0002
摘要： An array-based Compressed sensing Receiver Architecture (ACRA) includes an antenna array with two or more antennas connected to two or more ADCs that are clocked at two or more different sampling rates below the Nyquist rate of the incident signals. Comparison of the individual aliased outputs of the ADCs allows for estimation of signal component characteristics, including signal bandwidth, center frequency, and direction-of-arrival (DoA). Multiple digital signal processing (DSP) techniques, such as sparse fast Fourier transform (sFFT), can be employed depending on the type of detection or estimation.
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公开(公告)号：US09743024B2
公开(公告)日：2017-08-22
申请号：US14789601
申请日：2015-07-01
IPC分类号： H04N5/3745 , H04N5/335 , H04N7/18
CPC分类号： H04N5/37455 , H04N5/335 , H04N7/18
摘要： Conventional methods for imaging transient targets are constrained by a trade-off between resolution and frame rate, and transient targets moving faster than the detector frame typically result in image blurring. Imagers using digital-pixel focal plane arrays (“DFPAs”) have on-chip global pixel operation capability for extracting a single transient-feature (i.e., single-frequency discrimination) in a snapshot that depends on the number of counters implemented per pixel. However, these DFPA systems are not capable of multi-target and multi-frequency discrimination. Imagers described herein achieve multi-target transient signature discrimination orders of magnitude faster than the readout frame rate using in-pixel electronic shuttering with a known time-encoded modulation. Three-dimensional (x,y,t) data cube reconstruction is performed using compressive sensing algorithms.
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公开(公告)号：US20180035067A1
公开(公告)日：2018-02-01
申请号：US15678439
申请日：2017-08-16
IPC分类号： H04N5/3745 , H04N5/335 , H04N7/18
CPC分类号： H04N5/37455 , H04N5/335 , H04N7/18
摘要： Conventional methods for imaging transient targets are constrained by a trade-off between resolution and frame rate, and transient targets moving faster than the detector frame typically result in image blurring. Imagers using digital-pixel focal plane arrays (“DFPAs”) have on-chip global pixel operation capability for extracting a single transient-feature (i.e., single-frequency discrimination) in a snapshot that depends on the number of counters implemented per pixel. However, these DFPA systems are not capable of multi-target and multi-frequency discrimination. Imagers described herein achieve multi-target transient signature discrimination orders of magnitude faster than the readout frame rate using in-pixel electronic shuttering with a known time-encoded modulation. Three-dimensional (x,y,t) data cube reconstruction is performed using compressive sensing algorithms.
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公开(公告)号：US08644437B2
公开(公告)日：2014-02-04
申请号：US13227583
申请日：2011-09-08
申请人： Helen H. Kim , Merlin R. Green , Benjamin A. Miller , Andrew K. Bolstad , Andrew R. Chen , Daniel D. Santiago
发明人： Helen H. Kim , Merlin R. Green , Benjamin A. Miller , Andrew K. Bolstad , Andrew R. Chen , Daniel D. Santiago
IPC分类号： H04B1/10
CPC分类号： H03M1/1042 , H03F1/30 , H03F1/3205 , H03M1/002 , H03M1/0614 , H03M1/12
摘要： A method for digital compensation of a nonlinear system comprises identifying a plurality of circuit parameters of a nonlinear system. Each circuit parameter determines a nonlinear response of the nonlinear system. A first circuit parameter is chosen from the plurality of circuit parameters. The first circuit parameter determines a first effect on the nonlinear response. The first effect is at least as large a second effect from a second circuit parameter from the plurality of circuit parameters. At least one stimulus is applied to the nonlinear system. The nonlinear response of the nonlinear system is measured in response to the at least one stimulus. A compensation architecture is synthesized to substantially linearize the nonlinear response. The compensation architecture receives the nonlinear response of the nonlinear system and provides a substantially linear response.
摘要翻译： 一种用于非线性系统的数字补偿的方法包括识别非线性系统的多个电路参数。 每个电路参数决定非线性系统的非线性响应。 从多个电路参数中选择第一电路参数。 第一个电路参数决定了对非线性响应的第一个影响。 第一效果是来自多个电路参数的第二电路参数至少具有大的第二效果。 至少一个刺激被应用于非线性系统。 响应于至少一个刺激来测量非线性系统的非线性响应。 合成补偿架构以使非线性响应基本线性化。 补偿架构接收非线性系统的非线性响应并提供基本上线性的响应。
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