公开(公告)号：US07193558B1

公开(公告)日：2007-03-20

申请号：US10943647

申请日：2004-09-02

申请人： Karl R. Gerlach ,  Shannon D. Blunt

发明人： Karl R. Gerlach ,  Shannon D. Blunt

IPC分类号： G01S13/88

CPC分类号： G01S13/5246 ,  G01S7/295

摘要： An adaptive radar processing system includes an antenna array for transmitting a radar signal and for receiving a return radar signal, and a signal processor programmed with an enhanced FRACTA algorithm (FRACTA.E). The basic FRACTA algorithm is enhanced to FRACTA.E with (any or all of) five enhancements, versions 1–5. Version 1 is a stopping criterion, for censoring samples, that is adaptive to a radar return data set. The inclusion of a stopping criterion improves the computational speed of FRACTA.E thereby improving its efficiency. Version 2 uses global censoring. Version 3 uses fast reiterative censoring. Version 4 uses segmenting of data vectors for AMF application. Version 5 uses Knowledge-aided covariance estimation (KACE) to reduce the required sample support that may be necessary in non-homogeneous environments, providing substantially the same level of detection performance with considerably less training data.

摘要翻译： 自适应雷达处理系统包括用于发送雷达信号并用于接收返回雷达信号的天线阵列，以及用增强的FRACTA算法（FRACTA.E）编程的信号处理器。 使用（任何或全部）5个增强版本1-5来增强FRACTA.E的基本FRACTA算法。 版本1是用于检查样本的停止标准，适用于雷达返回数据集。 包含停止标准提高了FRACTA.E的计算速度，从而提高了其效率。 版本2使用全局审查。 版本3使用快速重复审查。 版本4使用AMF应用程序的数据向量分段。 版本5使用知识辅助协方差估计（KACE）来减少在非均匀环境中可能需要的样本支持，提供与相当少的训练数据基本相同的检测性能。

公开(公告)号：US07106250B2

公开(公告)日：2006-09-12

申请号：US10947784

申请日：2004-09-23

申请人： Shannon D. Blunt ,  Karl R. Gerlach

发明人： Shannon D. Blunt ,  Karl R. Gerlach

IPC分类号： G01S7/292 ,  G01S7/32 ,  G01S13/90 ,  G01S13/00

CPC分类号： G01S7/2921 ,  G01S13/284 ,  G01S13/9094

摘要： A method for processing a received, modulated pulse (i.e. waveform) that requires predictive deconvolution to resolve a scatterer from noise and other scatterers includes receiving a return signal; obtaining L+(2M−1)(N−1) samples y of the return signal, where y(l)={tilde over (x)}T(l) s+v(l); applying RMMSE estimation to each successive N samples to obtain initial impulse response estimates [{circumflex over (x)}1{−(M−1)(N−1)}, . . . , {circumflex over (x)}1{−1}, {circumflex over (x)}1 {0}, . . . , {circumflex over (x)}1{L−1}, . . . , {circumflex over (x)}1{L}, {circumflex over (x)}1{−1 +(M−1)(N−1)}]; computing power estimates {circumflex over (ρ)}1(l)=|{circumflex over (x)}1(l)|α for l=−(M−1)(N−1), . . . , L−1+(M−1)(N−1) and 0

公开(公告)号：US07286079B2

公开(公告)日：2007-10-23

申请号：US11110737

申请日：2005-04-21

申请人： Shannon D. Blunt ,  Karl R. Gerlach

发明人： Shannon D. Blunt ,  Karl R. Gerlach

IPC分类号： G01S7/292 ,  G01S13/52 ,  G01S13/534

CPC分类号： G01S7/2927 ,  G01S7/414

摘要： An apparatus for non-coherently detecting slow-moving targets in high resolution sea clutter includes a binary detector for converting high resolution radar returns, produced in response to a radar pulse scan of a plurality of identical pulses, into corresponding binary outputs based on a comparison of range cell magnitudes with a detector threshold. A range extent filter converts these binary outputs into an output indicating the presence or absence of a cluster of the returns that are closely spaced in range, while a third, persistence integration stage determines target range extent persistence over a predetermined time period. A detector stage declares detection of a target based on a comparison of the output of the third stage with a selected threshold.

摘要翻译： 用于在高分辨率海杂波中非相干检测慢移目标的装置包括用于将响应于多个相同脉冲的雷达脉冲扫描产生的高分辨率雷达返回转换为基于比较的相应二进制输出的二进制检测器 具有检测器阈值的范围单元幅度。 范围范围过滤器将这些二进制输出转换成指示存在或不存在距离范围紧密间隔的返回的集合的输出，而第三持续集成级在预定时间段内确定目标范围持续时间。 检测器级基于第三级的输出与所选择的阈值的比较来声明对目标的检测。

公开(公告)号：US07212150B2

公开(公告)日：2007-05-01

申请号：US11110736

申请日：2005-04-21

申请人： Shannon D. Blunt ,  Karl R. Gerlach

发明人： Shannon D. Blunt ,  Karl R. Gerlach

IPC分类号： G01S13/534

CPC分类号： G01S13/5244 ,  G01S7/2927

摘要： A method is provided for detecting a target signal of a specific known form in the presence of clutter. The method includes dividing a set of initial training data, derived from returns from a burst of identical pulses, into a set of censored data and a set of uncensored data. A covariance matrix estimate, based on the uncensored data, is used to compute adaptive coherence estimate values, and an average adaptive coherence estimate threshold level is computed for each Doppler band to obtain a corresponding threshold. The censored data and the covariance matrix estimate are used to compute adaptive coherence estimate values for the uncensored data for each Doppler band, and these values are compared with the respective thresholds to determine the presence or absence of the target signal.

摘要翻译： 提供了一种用于在存在杂波的情况下检测特定已知形式的目标信号的方法。 该方法包括将来自相同脉冲的脉冲串的返回的一组初始训练数据划分成一组被检查的数据和一组未经审查的数据。 使用基于未经审查的数据的协方差矩阵估计来计算自适应相干估计值，并且针对每个多普勒频带计算平均自适应相干估计阈值水平以获得相应的阈值。 被检查数据和协方差矩阵估计用于计算每个多普勒频带的未经审查数据的自适应相干估计值，并且将这些值与各个阈值进行比较以确定目标信号的存在或不存在。

公开(公告)号：US06940450B2

公开(公告)日：2005-09-06

申请号：US10673343

申请日：2003-09-30

申请人： Shannon D. Blunt ,  Karl R. Gerlach

发明人： Shannon D. Blunt ,  Karl R. Gerlach

IPC分类号： G01S7/292 ,  G01S13/28 ,  G01S7/32 ,  G01S13/00

CPC分类号： G01S7/2921 ,  G01S13/284

摘要： A method for processing a received, modulated pulse (i.e. waveform) that requires predictive deconvolution to resolve a scatterer from noise and other scatterers includes receiving a return signal; obtaining L+(2M−1)(N−1) samples y of the return signal, where y(l)={tilde over (x)}T(l)s+v(l); applying RMMSE estimation to each successive N samples to obtain initial impulse response estimates [{circumflex over (x)}1{−(M−1)(N−1)}, . . . , {circumflex over (x)}1{−1}, {circumflex over (x)}1{0}, . . . , {circumflex over (x)}1{L−1}, {circumflex over (x)}1{L}, . . . , {circumflex over (x)}1{L−1+(M−1)(N−1)}]; computing power estimates {circumflex over (ρ)}1(l)=|{circumflex over (x)}1(l)|2 for l=−(M−1)(N−1), . . . , L−1+(M−1)(N−1); computing MMSE filters according to w(l)=ρ(l)(C(l)+R)−1s, where ρ(l)=|x(l)|2 is the power of x(l), and R=E[v(l)vH(l)] is the noise covariance matrix; applying the MMSE filters to y to obtain [{circumflex over (x)}2{−(M−2)(N−1)}, . . . , {circumflex over (x)}2{−1}, {circumflex over (x)}2{0}, . . . , {circumflex over (x)}2{L−1}, {circumflex over (x)}2{L}, . . . , {circumflex over (x)}2{L−1+(M−2)(N−1)}]; and repeating (d)-(f) for subsequent reiterative stages until a desired length-L range window is reached, thereby resolving the scatterer from noise and other scatterers. The RMMSE predictive deconvolution approach provides high-fidelity impulse response estimation. The RMMSE estimator can reiteratively estimate the MMSE filter for each specific impulse response coefficient by mitigating the interference from neighboring coefficients that is a result of the temporal (i.e. spatial) extent of the transmitted waveform. The result is a robust estimator that adaptively eliminates the spatial ambiguities that occur when a fixed receiver filter is used.

公开(公告)号：US5561667A

公开(公告)日：1996-10-01

申请号：US719210

申请日：1991-06-21

申请人： Karl R. Gerlach

发明人： Karl R. Gerlach

IPC分类号： G06F17/00 ,  A04J15/00

CPC分类号： G10L19/0204 ,  G10L19/008 ,  G10L21/0208

摘要： A novel band partitioned noise cancellation method and device is disclosed. In the invention, in which main and auxiliary channel data is transformed to the frequency domain by FFT's and then associated by frequency subbands. The noise is then cancelled using a sequence of operations including a commutating Gram-Schmidt canceller, an equivalent linear weight calculator, formation of a weight matrix, conversion of the weights to time domain by an inverse FFT and rotation of the weights. The weights are then combined with the main and auxiliary channel data in a transversal filter network to produce a noise-cancellation residue.

摘要翻译： 公开了一种新颖的带分割噪声消除方法和装置。 在本发明中，主要和辅助信道数据通过FFT被转换到频域，然后由频率子带相关联。 然后使用包括换向Gram-Schmidt消除器，等效线性权重计算器，权重矩阵的形成，通过逆FFT和权重的旋转将权重转换为时域的操作序列来消除噪声。 然后将权重与横向滤波器网络中的主要和辅助信道数据组合以产生噪声消除残留。

公开(公告)号：USH767H

公开(公告)日：1990-04-03

申请号：US372962

申请日：1989-06-29

申请人： Frank F. Kretschmer, Jr. ,  Karl R. Gerlach

发明人： Frank F. Kretschmer, Jr. ,  Karl R. Gerlach

IPC分类号： G01S13/28 ,  G01S13/30

CPC分类号： G01S13/30 ,  G01S13/288

摘要： A method and apparatus exploiting the discovery that the cross-correlation of rows of Frank or P4 matrices of a given spacing sum to zero. In a ranging system, such as a radar, pulses are coded according to the rows of a Frank or P4 matrix, transmitted sequentially and each return processed sequentially through a filter matched to one of the coded pulses. (A different preselected filter is used for each return.) The sequence of filters is chosen so that for returns for a given range interval, each filter is matched to the returning pulse, resulting in outputs from the filters representing auto-correlations of the returned pulses. These outputs are time delayed added coherently to form the compressed pulse, and annunciated as a target hit. Should the filters and returns be mismatched, as with ambiguous stationary clutter returns, the outputs of the filters are cross-correlations which, according to said discovery, sum to zero. Thus the invention operates to remove ambiguous range clutter from returns in such a ranging system.

公开(公告)号：US5491487A

公开(公告)日：1996-02-13

申请号：US707480

申请日：1991-05-30

申请人： Karl R. Gerlach

发明人： Karl R. Gerlach

IPC分类号： G01S7/292 ,  G01S3/32

CPC分类号： G01S7/292

摘要： A method and apparatus are provided for filtering noise from a plurality of input signals in a sensor system. One first main input signal and several first auxiliary input signals are obtained and interior weights corresponding to the first main and auxiliary signals are determined. Thereafter, equivalent linear weights corresponding to the interior weights are determined and the equivalent linear weights are applied to second main and auxiliary input signals to filter the second main and auxiliary signals and produce one final output signal. Alternatively, the first input signals can be a subset of the second input signals such that a large set of input signals can be filtered by calculating weighting factors from a subset thereof.

摘要翻译： 提供了一种用于对来自传感器系统中的多个输入信号的噪声进行滤波的方法和装置。 获得一个第一主输入信号和几个第一辅助输入信号，并且确定对应于第一主信号和辅助信号的内部权重。 此后，确定对应于内部权重的等效线性权重，并且将等效线性权重应用于第二主输入信号和辅助输入信号以对第二主信号和辅助信号进行滤波并产生一个最终输出信号。 或者，第一输入信号可以是第二输入信号的子集，使得可以通过从其子集计算加权因子来过滤大量输入信号。

公开(公告)号：US5047784A

公开(公告)日：1991-09-10

申请号：US647946

申请日：1991-01-30

申请人： Karl R. Gerlach ,  Frank F. Kretschmer, Jr.

发明人： Karl R. Gerlach ,  Frank F. Kretschmer, Jr.

IPC分类号： G01S13/28

CPC分类号： G01S13/284

摘要： A method and apparatus exploiting the discovery that the crosscorrelation of constantly spaced rows of the matrices representing certain pulse codes sum to zero. In a ranging system, such as a radar, pulses are coded according to the rows of a such a matrix, transmitted sequentially and each return processed sequentially through a filter matched to one of the coded pulses. (A different preselected filter is used for each return.) The sequence of filters is chosen so that for returns for a given range interval, each filter is matched to the returning pulse, resulting in outputs from the filters representing auto-correlations of the returned pulses. These outputs are time delayed added coherently to form the compressed pulse, and annunciated as a target hit. Should the filters and returns be mismatched, as with ambiguous stationary clutter returns, the outputs of the filters are cross-correlations which, according to said discovery, sum to zero. Thus the invention operates to remove ambiguous range clutter from returns in such a ranging system.

摘要翻译： 一种利用这种发现的方法和装置，表示某些脉冲编码的矩阵的恒定间隔的行的相关性总和为零。 在诸如雷达的测距系统中，脉冲根据这样的矩阵的行被顺序地传输，并且每个返回顺序地通过与一个编码脉冲匹配的滤波器处理。 （每个返回使用不同的预选滤波器）。选择滤波器序列，以便为给定范围间隔的返回值，每个滤波器与返回脉冲匹配，导致来自滤波器的输出表示返回的自相关 脉冲。 这些输出被相加地时间延迟以形成压缩脉冲，并且被报告为目标命中。 如果滤波器和返回不匹配，就像模糊的静态杂波返回一样，滤波器的输出是互相关的，根据所述发现，它们相加为零。 因此，本发明用于在这种测距系统中消除不明确的范围杂波与回报。

公开(公告)号：US07167884B2

公开(公告)日：2007-01-23

申请号：US10126663

申请日：2002-04-22

申请人： Michael Picciolo ,  Karl R. Gerlach ,  Jay S. Goldstein

发明人： Michael Picciolo ,  Karl R. Gerlach ,  Jay S. Goldstein

IPC分类号： G06F17/10

CPC分类号： G01S7/292

摘要： An adaptive signal processing system utilizes a Multistage Weiner Filter having an analysis section and a synthesis section that includes a processor. The processor includes an algorithm for generating a data adaptive linear transformation, computing an adaptive weighting wmed of the data, and applying the computed adaptive weighting wmed to a function of a main input signal and an auxiliary input signal to generate an output signal. A plurality of building blocks in a Gram-Schmidt cascaded canceller-type configuration sequentially decorrelate input signals from each other to produce a single filtered output signal. Each building block generates an adaptive weight wmed that is applied to generate a local output signal. The effect of non-Gaussian noise contamination on the convergence MOE of the system is negligible. In addition, when desired signal components are included in weight training data they cause little loss of noise cancellation.

摘要翻译： 自适应信号处理系统利用具有分析部分和包括处理器的合成部分的多级维纳滤波器。 该处理器包括用于产生数据自适应线性变换的算法，计算数据的自适应加权，并将所计算的自适应加权函数应用于 主输入信号和辅助输入信号以产生输出信号。 Gram-Schmidt级联消除器型配置中的多个构建块顺序地将输入信号彼此相关联以产生单个滤波输出信号。 每个构建块生成适用于生成本地输出信号的自适应权重。 非高斯噪声污染对系统收敛MOE的影响可以忽略不计。 另外，当需要的信号分量包括在重量训练数据中时，它们几乎不会造成噪声消除的损失。