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11. 发明授权

US06987707B2 Method and system for in-air ultrasonic acoustical detection and characterization 失效
标题翻译：空气超声波声学检测和表征的方法和系统
公开(公告)号：US06987707B2
公开(公告)日：2006-01-17
申请号：US10712805
申请日：2003-11-12
申请人： Paul L. Feintuch , Francis A. Reed , Michael Cox , Ronald A. Borrell
发明人： Paul L. Feintuch , Francis A. Reed , Michael Cox , Ronald A. Borrell
IPC分类号： G01S15/04 , G01S15/06
CPC分类号： G08B13/1618 , G01S7/52006 , G01S7/539 , G01S15/04 , G01S15/523 , G01S15/66 , G01S15/87
摘要： A system and method are presented for determining the detection and location of persons and objects using ultrasonic acoustic sensors. The system allows detection of stationary and moving persons and other objects, through atmospheric conditions, to a distance of at least 300 feet. The invention further provides for enhanced signal processing through the use of arrays of transmitters and receivers, where one or more transmitter arrays may be oriented substantially perpendicularly to one or more receiver arrays, allowing high directionality and good rejection of reverberations, background noise, clutter and objects not of interest.
摘要翻译：提出了一种系统和方法，用于确定使用超声波传感器的人和物体的检测和位置。该系统允许通过大气条件将固定和移动的人和其他物体检测到至少300英尺的距离。本发明还通过使用发射器和接收器的阵列来提供增强的信号处理，其中一个或多个发射器阵列可以基本上垂直于一个或多个接收器阵列取向，允许高方向性和良好的反射混响，背景噪声，杂波和不感兴趣的对象

12. 发明授权

US5388080A Non-integer sample delay active noise canceller 失效
标题翻译：非整数采样延迟有源噪声消除器
公开(公告)号：US5388080A
公开(公告)日：1995-02-07
申请号：US53738
申请日：1993-04-27
申请人： Paul L. Feintuch , Allen K. Lo
发明人： Paul L. Feintuch , Allen K. Lo
IPC分类号： G10K11/178 , H03H21/00 , H04B3/04 , H04B15/00
CPC分类号： G10K11/178 , G10K2210/3025 , G10K2210/3032 , G10K2210/3045 , G10K2210/3051 , G10K2210/503 , Y10S367/901
摘要： An active adaptive noise canceller that inserts delays into the weight update logic of an adaptive filter to keep the filter stable. The noise and residual noise are sensed and the respective sensor signals are digitized at a given sample rate for processing in the adaptive filter. To eliminate the need for high sample rates while maintaining flexibility in the frequency regions over which the adaptive filter is stable, the delay introduced into the weight update logic is a non-integer multiple of the sample period. The non-integer sample delay is obtained by a sample interpolation and decimation procedure.
摘要翻译：一种主动自适应噪声消除器，其将延迟插入到自适应滤波器的权重更新逻辑中以保持滤波器稳定。检测噪声和残留噪声，并以给定的采样率对相应的传感器信号进行数字化处理，以在自适应滤波器中进行处理。为了消除对采样率高的需要，同时保持自适应滤波器稳定的频率区域的灵活性，引入加权更新逻辑的延迟是采样周期的非整数倍。通过样本内插和抽取程序获得非整数采样延迟。

13. 发明授权

US5130952A Broadband adaptive doppler estimator and canceller 失效
标题翻译：宽带自适应多普勒估计和消除器
公开(公告)号：US5130952A
公开(公告)日：1992-07-14
申请号：US588645
申请日：1990-09-26
申请人： Paul L. Feintuch , William E. Alexander
发明人： Paul L. Feintuch , William E. Alexander
IPC分类号： G01S11/14
CPC分类号： G01S11/14 , Y10S367/904
摘要： A broadband adaptive Doppler estimator and canceller is described for adaptively removing a moving source of near field primary interference that is masking a weaker target. The estimator and canceller employs a distributed field of sensors, through which is moving the source of interference. The estimator and canceller takes the form of a canceller system, wherein the measured reference waveform is a Doppler shifted version of the interference. The estimator and canceller employ interpolating and decimating of the reference waveform to remove Doppler effects over a broadband. The interpolation is performed by oversampling (zero padding) and low pass filtering, and the decimation is a sample rate reduction. The adaption is performed in the decimation to minimize mean square error in the canceller output.
摘要翻译：描述了宽带自适应多普勒估计器和消除器，用于自适应地去除掩蔽较弱目标的近场主干扰的移动源。估计器和消除器采用分布式传感器领域，通过该传感器移动干扰源。估计器和消除器采取消除器系统的形式，其中所测量的参考波形是干扰的多普勒偏移版本。估计器和消除器采用参考波形的内插和抽取来消除宽带上的多普勒效应。通过过采样（零填充）和低通滤波执行插值，抽取是采样率降低。在抽取中执行适应以最小化消除器输出中的均方误差。

14. 发明授权

US5117401A Active adaptive noise canceller without training mode 失效
标题翻译：没有训练模式的主动自适应噪声消除器
公开(公告)号：US5117401A
公开(公告)日：1992-05-26
申请号：US568289
申请日：1990-08-16
申请人： Paul L. Feintuch
发明人： Paul L. Feintuch
IPC分类号： G10K11/178
CPC分类号： G10K11/1784 , G10K2210/30232 , G10K2210/3045 , G10K2210/3053 , G10K2210/503 , Y10S367/901
摘要： An active adaptive noise canceller that inserts delays in the weight update logic of an adaptive filter employed by the canceller to make the filter stable. It has been found that there is a great deal of flexibility regarding the selection of the delay values. This insensitivity permits designing the delays in advance, and not having to adjust them to different situations as they change, thus no longer requiring a training mode. The canceller dramatically reduces the amount of hardward needed to perform active adaptive noise cancelling, and eliminates the need for the training mode, which in some applications, including automobiles, for example, can be as objectionable as the noise sources that are to be suppressed.

15. 发明授权

US4654835A Adaptive predictor of surface reverberation in a bistatic sonar 失效
标题翻译：双基声纳表面混响的自适应预测器
公开(公告)号：US4654835A
公开(公告)日：1987-03-31
申请号：US632769
申请日：1984-07-20
申请人： Paul L. Feintuch
发明人： Paul L. Feintuch
IPC分类号： G01S7/526 , G01S15/87 , G01S9/68
CPC分类号： G01S7/526 , G01S15/003 , G01S15/87
摘要： A bistatic sonar employing LMS adaptive spatial prediction is used to process against surface reverberation from the convergence zone (CZ). Hydrophones spatially separated from the primary array are used as references. The critical behavior exploited by the invention is that since the reverberation may be viewed as an extended source for the reverberation, the correlation drops off with separation between the reference and primary sensors, while it stays a constant for the plane wave target return. The reverberation is non-stationary, functionally dependent on the signal (even though the back scatter is statistically uncorrelated with the signal), and spatially extended over the sector of the CZ annulus cut out by the transmitter azimuth beamwidth. The detection of the target is based on the sudden appearance of one strong target point source within a densely packed region of weak point sources that have been constantly present and whose sum is much larger than the target. The use of more than a single reference leads to a minimal improvement in detection performance and may actually degrade performance due to increased algorithm noise. Detection performance tends to increase with increasing separation distance between the primary and the reference hydrophone. For signal, reverberation, and algorithm parameters consistent with modern active sonars operating in the CZ mode, the spatial prediction approach to detection of the plane wave signal will allow detection of targets not possible using conventional active processing, provided the reference hydrophone can be placed to give a correlation of less than 0.05. Such values may be obtained with very reasonable spacing between primary and reference, allowing the reference to be positioned, for example, along the hull aft of the primary array.
摘要翻译：使用采用LMS自适应空间预测的双基声纳来处理来自收敛区（CZ）的表面混响。作为参考，使用与主阵列空间分离的水球。本发明所采用的关键行为在于，由于混响可以被视为混响的扩展源，所以在参考和主传感器之间的间隔中，相关性会随着平面波目标返回的恒定而下降。混响是非平稳的，在功能上取决于信号（即使背散射与信号统计学上不相关），并且在发射机方位波束宽度切出的CZ环的扇区上空间扩展。目标的检测是基于一直存在的弱点源的密集区域中的一个强目标点源的突然出现，其总和远大于目标。使用多于一个参考导致检测性能的最小改善，并且可能由于增加的算法噪声而实际上降低了性能。检测性能随着主要和参考水听器间隔距离的增加趋于增加。对于与在CZ模式下工作的现代主动声纳一致的信号，混响和算法参数，用于检测平面波信号的空间预测方法将允许使用传统的主动处理来检测不可能的目标，只要参考水听器可以放置在给出小于0.05的相关性。这样的值可以在主要和参考之间具有非常合理的间隔来获得，允许参考例如沿主阵列的船体后方定位。

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