公开(公告)号：US20080074310A1

公开(公告)日：2008-03-27

申请号：US11837243

申请日：2007-08-10

申请人： Shannon Blunt ,  Thomas Higgins

发明人： Shannon Blunt ,  Thomas Higgins

IPC分类号： G01S13/00 ,  H04B15/00

CPC分类号： G01S13/284

摘要： One aspect of this disclosure relates to a method for processing a received, modulated radar pulse to resolve a radar target from noise or other targets. According to an embodiment of the method, a radar return signal is received and samples of the radar return signal are obtained. A minimum mean-square error (MMSE) pulse compression filter is determined for each successive sample. The MMSE filter is separated into a number of components using contiguous blocking, where each component includes a piecewise MMSE pulse compression filter segment. An estimate of radar range profile is obtained from an initialization stage or a previous stage. The piecewise MMSE pulse compression filter segments are applied to improve accuracy of the estimate. The estimate is repeated for two or three stages to adaptively suppress range sidelobes to a level of a noise floor. Other aspects and embodiments are provided herein.

摘要翻译： 本公开的一个方面涉及一种用于处理接收的调制雷达脉冲以从噪声或其他目标解析雷达目标的方法。 根据该方法的实施例，接收雷达返回信号，并获得雷达返回信号的采样。 确定每个连续样本的最小均方误差（MMSE）脉冲压缩滤波器。 MMSE滤波器使用连续的阻塞被分成多个组件，其中每个组件包括分段MMSE脉冲压缩滤波器段。 从初始化阶段或前一阶段获得雷达距离轮廓的估计。 应用分段MMSE脉冲压缩滤波器段来提高估计的准确度。 重复估计两到三个阶段以自适应地将范围旁瓣抑制到噪声底层的水平。 本文提供了其它方面和实施例。

公开(公告)号：US20070080855A1

公开(公告)日：2007-04-12

申请号：US10943647

申请日：2004-09-02

申请人： Karl Gerlach ,  Shannon Blunt

发明人： Karl Gerlach ,  Shannon 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：US20060238412A1

公开(公告)日：2006-10-26

申请号：US11110737

申请日：2005-04-21

申请人： Shannon Blunt ,  Karl Gerlach

发明人： Shannon Blunt ,  Karl Gerlach

IPC分类号： G01S7/292 ,  G01S7/34 ,  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：US20060097908A1

公开(公告)日：2006-05-11

申请号：US11268410

申请日：2005-11-07

申请人： Karl Gerlach ,  Shannon Blunt

发明人： Karl Gerlach ,  Shannon Blunt

IPC分类号： G01S13/52

CPC分类号： G01S13/282 ,  G01S7/292

摘要： A radar pulse compression repair (RPCR) system includes a receiver for receiving a radar return signal, a matched filter for applying matched filtering to the radar return signal to generate a matched filter output, a processor programmed for applying Radar Pulse Compression Repair (RPCR) to the matched filter output to suppress a plurality of range sidelobes from the matched filter output, and a detector for receiving the RPCR-processed output. The RPCR invention in operating upon the output of the matched filter enables RPCR to be employed as a post-processing stage in systems where it is not feasible to replace the existing pulse compression apparatus. RCPR can also be selectively employed when it is possible that large targets are present that may be masking smaller targets, thereby keeping computational complexity to a minimum.

摘要翻译： 雷达脉冲压缩修复（RPCR）系统包括用于接收雷达返回信号的接收机，用于对雷达返回信号应用匹配滤波以产生匹配滤波器输出的匹配滤波器，被编程用于应用雷达脉冲压缩修复（RPCR） 到匹配滤波器输出以从匹配滤波器输出抑制多个范围旁瓣，以及用于接收经RPCR处理的输出的检测器。 在对匹配滤波器的输出进行操作的RPCR发明中，RPCR可用作不能替代现有的脉冲压缩装置的系统中的后处理级。 当可能存在可能掩盖较小目标的大目标时，也可以选择性地使用RCPR，从而将计算复杂度降至最低。

公开(公告)号：US20050046612A1

公开(公告)日：2005-03-03

申请号：US10673343

申请日：2003-09-30

申请人： Shannon Blunt ,  Karl Gerlach

发明人： Shannon Blunt ,  Karl Gerlach

IPC分类号： G01S7/292 ,  G01S13/28 ,  G01S13/26

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+ν(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.

摘要翻译： 一种用于处理需要预测去卷积以从噪声和其他散射体分解散射体的接收的调制脉冲（即，波形）的方法包括：接收返回信号; 获得返回信号的L +（2M-1）（N-1）个样本y，其中y（1）= x（1）s + nu（1）; 对每个连续的N个样本应用RMMSE估计以获得初始脉冲响应估计[x1 { - （M-1）（N-1）}}。 。 。 ，x1 {-1}，x1 {0}，。 。 。 ，x1 {L-1}，x1 {L}，。 。 。 ，x1 {L-1 +（M-1）（N-1）}]; 对于l = - （M-1）（N-1），计算功率估计＆rgr1（l）= | x1（l）| <2。 。 。 ，L-1 +（M-1）（N-1）; 根据w（l）= rho（1）（C（1）+ R）<1>计算MMSE滤波器，其中rho（1）= | x（1）| <2是x（l ），R = E [v（1）v H（1）]是噪声协方差矩阵; 将MMSE滤波器应用于y以获得[x2 { - （M-2）（N-1）}}。 。 。 ，x2 {-1}，x2 {0}，。 。 。 ，x2 {L-1}，x2 {L}，。 。 。 ，x2 {L-1 +（M-2）（N-1）}]; 并重复（d） - （f）以进行后续的重复阶段，直到达到所需的长度L范围窗口，从而从噪声和其他散射体中分辨出散射体。 RMMSE预测去卷积方法提供了高保真脉冲响应估计。 RMMSE估计器可以通过减轻作为发送波形的时间（即空间）范围的结果的来自相邻系数的干扰来重复地估计每个特定脉冲响应系数的MMSE滤波器。 结果是一个鲁棒的估计器，自适应地消除了使用固定接收机滤波器时发生的空间模糊度。

公开(公告)号：US20060238408A1

公开(公告)日：2006-10-26

申请号：US11110736

申请日：2005-04-21

申请人： Shannon Blunt ,  Karl Gerlach

发明人： Shannon Blunt ,  Karl Gerlach

IPC分类号： G01S7/34 ,  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：US20060097909A1

公开(公告)日：2006-05-11

申请号：US11268755

申请日：2005-11-07

申请人： Shannon Blunt ,  Karl Gerlach

发明人： Shannon Blunt ,  Karl Gerlach

IPC分类号： G01S13/52

CPC分类号： G01S7/292 ,  G01S13/282

摘要： A radar receiver system includes a receiver, a processor, and a detector. The processor is programmed with a Multistatic Adaptive Pulse Compression (MAPC) algorithm for estimating adaptively a pulse compression filter, for each range cell of a plurality of range cells, and for each of a plurality of radar return signals, to remove interference between the radar return signals. MAPC may also include reiterative minimum mean-square error estimation for applying to each of the range cells in order to adaptively estimate a unique pulse compression filter for each cell. MAPC adaptively mitigates the masking problem that results from the autocorrelation of a waveform which produces range sidelobes scaled by the target amplitudes as well as the cross-correlation between waveforms. MAPC can also be applied when only 1 or some subset of the available illuminated radar range profiles are desired, with undesired information then discarded.

公开(公告)号：US20050057392A1

公开(公告)日：2005-03-17

申请号：US10947784

申请日：2004-09-23

申请人： Shannon Blunt ,  Karl Gerlach

发明人： Shannon Blunt ,  Karl Gerlach

IPC分类号： G01S7/292 ,  G01S13/28 ,  G01S13/90

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(Λ)={tilde over (x)}T(Λ)s+ν(Λ); 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}, . . . , {circumflex over (x)}1{L−1}, {circumflex over (x)}1{l−1+(M−1)(N−1)}]; computing power estimates {circumflex over (ρ)}1(Λ)=|{circumflex over (x)}1(Λ)|α for Λ=−(M−1)(N−1), . . . , L−1+(M−1)(N−1) and 0

摘要翻译： 一种用于处理需要预测去卷积以从噪声和其他散射体分解散射体的接收的调制脉冲（即，波形）的方法包括：接收返回信号; 获得返回信号的L +（2M-1）（N-1）个样本y，其中y（Lambda）= x（λ）s + nu（Lambda）; 对每个连续的N个样本应用RMMSE估计以获得初始脉冲响应估计[x1 { - （M-1）（N-1）}}。 。 。 ，x1 {-1}，x1 {0}，。 。 。 ，x1 {L}，。 。 。 ，x1 {L-1}，x1 {1-1 +（M-1）（N-1）}]; 对于λ= - （M-1）（N-1），计算功率估计＆rgr1（Lambda）= | x1（λ）|α。 。 。 ，L-1 +（M-1）（N-1）和0 <α<= 2; 根据w（Lambda）= rho（Lambda）（C（Lambda）+ R）1 s计算MMSE滤波器，其中rho（λ）= E [| x（λ）|α） 对于0 <α= 2，并且R = E [nu（λ）nu H（Lambda）]是噪声协方差矩阵; 将MMSE滤波器应用于y以获得[x2 { - （M-2）（N-1）}}。 。 。 ，x2 {-1}，x2 {0}，。 。 。 ，x2 {L-1}，x2 {L}，。 。 。 ，x2 {L-1 +（M-2）（N-1）}]; 并重复（d） - （f）以进行后续的重复阶段，直到达到所需的长度L范围窗口，从而从噪声和其他散射体中分辨出散射体。 RMMSE预测去卷积方法提供了高保真脉冲响应估计。 RMMSE估计器可以通过减轻作为发送波形的时间（即空间）范围的结果的来自相邻系数的干扰来重复地估计每个特定脉冲响应系数的MMSE滤波器。 结果是一个鲁棒的估计器，自适应地消除了使用固定接收机滤波器时发生的空间模糊度。