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公开(公告)号：US07319640B1
公开(公告)日：2008-01-15
申请号：US11484149
申请日：2006-06-26
IPC分类号： G01S3/86
CPC分类号： G01S3/86 , G01S5/18 , Y10S367/901
摘要： A method and apparatus is provided for suppressing noise which includes receiving a plurality of signals from an array of sensors and transforming each of these signals to the frequency domain. The transformed signals are beamformed so that noise sources can be identified by bearing and frequency range. A planewave-fit noise-suppression routine is then used to remove identified noise sources from the transformed signals and to provide a noise-suppressed transformed signal having signals from said identified noise sources suppressed.
摘要翻译： 提供了一种用于抑制噪声的方法和装置，其包括从传感器阵列接收多个信号并将这些信号中的每一个转换到频域。 变换的信号被波束形成，使得可以通过轴承和频率范围来识别噪声源。 然后使用平面拟合噪声抑制程序来从经变换的信号中去除识别的噪声源，并提供具有被抑制的来自所识别的噪声源的信号的噪声抑制变换信号。
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公开(公告)号：US5481505A
公开(公告)日：1996-01-02
申请号：US446117
申请日：1995-05-15
CPC分类号： G01S5/20 , G01S3/8083
摘要： A method and apparatus for detecting, processing and tracking sonar signalso provide bearing, range and depth information that locates an object in three-dimensional underwater space. An inverse beamformer utilizes signals from a towed horizontal array of hydrophones to estimate a bearing to a possible object. A matched field processor receives measured covariance matrix data based upon signals from the hydrophones and signals from a propagation model. An eight nearest neighbor peak picker provides plane wave peaks in response to output beam levels from the matched processor. A five-dimensional M of N tracker identifies peaks within the specified limit of frequency, bearing change over time, range and depth to specify an object as a target and to display its relative range and depth with respect to the array of hydrophones.
摘要翻译： 一种用于检测，处理和跟踪声纳信号以提供在三维水下空间中定位物体的轴承，距离和深度信息的方法和装置。 反向波束形成器利用来自拖曳水平线的水平阵列的信号来估计对可能物体的方位。 匹配的场处理器基于来自水听器的信号和来自传播模型的信号接收测量的协方差矩阵数据。 八个最近相邻峰值选择器响应于来自匹配处理器的输出光束电平提供平面波峰值。 N跟踪器的五维M识别在指定的频率极限内的峰值，随着时间，距离和深度的变化，以将对象指定为目标，并相对于水听器阵列显示其相对范围和深度。
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公开(公告)号：US06525994B2
公开(公告)日：2003-02-25
申请号：US09853933
申请日：2001-05-11
申请人： James B. Donald , James H. Wilson
发明人： James B. Donald , James H. Wilson
IPC分类号： G01S380
CPC分类号： G01S3/8083 , G01V1/001
摘要： A method and apparatus for detecting, processing and tracking sonar signals to provide bearing, range and depth information that locates an object in three-dimensions underwater space. A Twenty Six Nearest Neighbor Peak Picker (TSNNPP) is disclosed that improves the detection of signals in noisy background by differentiating bandwidth (BW) characteristics of signals from BW characteristics of noise.
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公开(公告)号：US06424596B1
公开(公告)日：2002-07-23
申请号：US09968398
申请日：2001-10-01
申请人： James B. Donald
发明人： James B. Donald
IPC分类号： G01S386
CPC分类号： G01S3/86 , G01S5/18 , G01S5/20 , Y10S367/901
摘要： The present invention is directed to a method and system for significantly reducing the acoustic noise from near-surface sources using an array processing technique that utilizes Multiple Signal Classification (MUSIC) beamforming and the Lloyd's Mirror interference pattern at very low frequencies. Noise from nearby near-surface sources, such as merchant ships, super tankers, fishing trawlers, seismic profiling platforms, or other sources near the ocean surface can significantly interfere with the detection and tracking of a quiet target-of-interest (TOI) located well below the ocean surface. The present invention reduces the noise of the near-surface sources without degrading the signal level and quality of the TOI. The present invention utilizes a unique application of the MUSIC beamforming process to separate the noise and signal subspace. Next, eigenvalue beamforming is used to reduce narrowband energy in selected frequency bins wherein the near-surface noise is radiating. Next, predetermined frequency and magnitude variance parameters are used to eliminate broadband noise emanating from the near-surface sources.
摘要翻译： 本发明涉及一种使用利用多信号分类（MUSIC）波束成形的阵列处理技术和在非常低频率下的劳埃德镜像干扰模式来显着降低来自近地表源的声学噪声的方法和系统。 来自附近近地面源的噪音，如商船，超级油罐车，拖网渔船，地震剖面平台，或靠近海洋表面的其他来源的噪音，可能会严重影响到安静的目标感兴趣区域（TOI）的检测和跟踪 远远低于海洋表面。 本发明在不降低TOI信号水平和质量的情况下降低了近地面源的噪声。 本发明利用MUSIC波束形成过程的独特应用来分离噪声和信号子空间。 接下来，使用特征值波束成形来减少所选频率箱中的窄带能量，其中近表面噪声辐射。 接下来，使用预定的频率和幅度方差参数来消除从近地表源发出的宽带噪声。
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