公开(公告)号：US6011754A

公开(公告)日：2000-01-04

申请号：US33211

申请日：1998-03-02

申请人： David Burgess ,  Lee Felsenstein ,  Steven E. Saunders

发明人： David Burgess ,  Lee Felsenstein ,  Steven E. Saunders

IPC分类号： A61H3/06 ,  G01S7/521 ,  G01S7/534 ,  G01S15/32 ,  G01S15/34 ,  G01S15/87 ,  G01S15/88 ,  G01S15/93

CPC分类号： G01S15/34 ,  A61H3/061 ,  G01S15/88 ,  G01S7/521 ,  G01S7/534 ,  G01S15/87 ,  G01S15/93 ,  H04R5/033 ,  Y10S367/91

摘要： A personal object or obstacle detector apparatus with enhanced stereo imaging capability includes a sonar system having dual receivers with field lobes positioned based on psychoacoustic considerations such as interaural intensity difference (IID) and interaural time difference (ITD). Receiver field pattern shapes and directions are selected to match the natural IID and ITD associated with human hearing. In one embodiment, dual receivers are used with a common transmitter while another embodiment utilizes two transmitter/receiver pairs with the transmitter and receiver collocated.

摘要翻译： 具有增强的立体成像能力的个人物体或障碍物检测器装置包括具有双接收器的声纳系统，所述双接收器具有基于诸如颅内强度差异（IID）和心律时间差（ITD）的心理声学考虑而定位的视野瓣。 接收器场图案形状和方向被选择以匹配与人类听觉相关联的自然IID和ITD。 在一个实施例中，双接收机与公共发射机一起使用，而另一个实施例利用与发射机和接收机并置的两个发射机/接收机对。

公开(公告)号：US5748507A

公开(公告)日：1998-05-05

申请号：US689509

申请日：1996-08-06

申请人： Theagenis J. Abatzoglou ,  Lawrence K. Lam ,  Homayoun Malek ,  John T. Reagan

发明人： Theagenis J. Abatzoglou ,  Lawrence K. Lam ,  Homayoun Malek ,  John T. Reagan

IPC分类号： G01R23/167 ,  G01S3/04 ,  G01S3/801 ,  G01S7/285 ,  G01S7/35 ,  G01S7/526 ,  G01S7/534 ,  H03M1/06

CPC分类号： G01R23/167 ,  G01S2007/356 ,  G01S3/043 ,  G01S3/801 ,  G01S7/285 ,  G01S7/352 ,  G01S7/526 ,  G01S7/534

摘要： A signal processing system and method capable of real-time implementation for extracting signal parameter information with high accuracy and resolution. Signals (101) are passed through a filter bank (102), downconverted and decimated. The superresolution technique of constrained total least squares (CTLS) is used to process the resulting samples to obtain frequency components and their amplitudes (106). CTLS may also be used to obtain decaying coefficients associated with each frequency components. If desired, the results of CTLS may be used to extend original data for higher resolution spectral analysis and output (109).

摘要翻译： 一种能够实时实现高精度，高分辨率提取信号参数信息的信号处理系统和方法。 信号（101）通过滤波器组（102），被下变频和抽取。 使用约束总最小二乘法（CTLS）的超分辨率技术来处理所得样本以获得频率分量及其振幅（106）。 也可以使用CTLS来获得与每个频率分量相关联的衰减系数。 如果需要，CTLS的结果可以用于扩展原始数据，用于更高分辨率的光谱分析和输出（109）。

公开(公告)号：US5631876A

公开(公告)日：1997-05-20

申请号：US685944

申请日：1967-11-27

申请人： James H. Donegan

发明人： James H. Donegan

IPC分类号： G01S7/527 ,  G01S7/534 ,  G01S15/58 ,  G01S15/00

CPC分类号： G01S7/527 ,  G01S7/5345 ,  G01S15/58

摘要： A signal processor for continuous wave (CW) sonars of the type using a doppler filter bank for target detection, in which improved detection capability under reverberation limited conditions and particularly at relatively low doppler values is accomplished by introduction of an adaptive filter providing a notch filter characteristic centered on the mean frequency of the reverberation spectrum and of width and depth continuously automatically adjusted to conform at least approximately to the inverse of the reverberation spectrum. For effecting this adjustment the notch filter is made voltage variable and is enclosed within an automatic notch control (ANC) loop in which the notch control voltage is derived by comparison of signal level on one doppler filter on which appears reverberation plus noise against signal level on another on which appears noise only, to thus derive a control signal providing a measure of reverberation level. The ANC loop thus controlled operates in conjunction with associated automatic gain control (AGC) and automatic frequency control (AFC) loops, to "prewhiten" or flatten the reverberation and noise spectra in a manner such that each of the matched filters in the doppler bank may contribute equally to its output.

摘要翻译： 用于用于目标检测的多普勒滤波器组的类型的连续波（CW）声纳的信号处理器，其中在混响有限条件下，特别是在相对低的多普勒值下改进的检测能力通过引入提供陷波滤波器的自适应滤波器来实现 以混响频谱的平均频率为中心的特征，宽度和深度的连续自动调整至少大约符合混响谱的倒数。 为了实现这种调整，陷波滤波器被制成电压可变的并被封装在自动陷波控制（ANC）环路中，其中通过比较在一个多普勒滤波器上的信号电平导致的陷波控制电压，其上出现混响加噪声与信号电平 另一个出现噪声，从而导出提供混响电平的量度的控制信号。 如此控制的ANC回路与相关的自动增益控制（AGC）和自动频率控制（AFC）循环相结合，以“预白化”或以混合和噪声谱平坦化，使得多普勒组中的每个匹配滤波器 可能有助于其产出。

公开(公告)号：US5481503A

公开(公告)日：1996-01-02

申请号：US680953

申请日：1984-12-12

申请人： John P. Kuhn ,  Thomas S. Heath

发明人： John P. Kuhn ,  Thomas S. Heath

IPC分类号： G01S7/527 ,  G01S7/534 ,  G01S7/539 ,  G01S15/52 ,  G06F17/15 ,  G06F15/336 ,  G01R23/16 ,  G81C27/00

CPC分类号： G01S7/5273 ,  G01S15/52 ,  G06F17/15 ,  G01S7/534 ,  G01S7/539

摘要： The invention discloses an apparatus for and a method of adaptively processing a sonar power spectrum for improving the display of narrowband line structure characteristic of a target in a background of broadband interference which is rippled due to multipath propagation arrival structure. The processor employs a first Fourier transformer to convert the sonar frequency data into a complex correlation format. The autocorrelation is then time difference sampled to separate the broadband ripple interference from the broadband trend interference. The separate time difference samples are then transformed back to their real frequency format to form a broadband ripple estimate and a broadband trend estimate of the interference background. The ripple estimate is subtracted from the sonar signal to remove the ripple component and the resulting difference is normalized by a division by the interference trend estimate. The result is improved detectability of the narrowband lines in the presence of widely varying multipath interference.

摘要翻译： 本发明公开了一种自适应处理声纳功率谱的装置和方法，用于改善由于多径传播到达结构而波纹的宽带干扰背景下的目标的窄带线结构特征的显示。 处理器采用第一傅里叶变换器将声纳频率数据转换成复相关格式。 然后采用自相关采样时间差分离宽带纹波干扰与宽带趋势干扰。 然后将单独的时间差样本转换回其实际频率格式以形成宽带纹波估计和干扰背景的宽带趋势估计。 从声纳信号中减去纹波估计值以去除纹波分量，并且通过干扰趋势估计除以得到的差异进行归一化。 结果是在存在广泛变化的多径干扰的情况下提高了窄带线路的可检测性。

公开(公告)号：US4839039B1

公开(公告)日：1994-02-22

申请号：US83474186

申请日：1986-02-28

申请人： RECURRENT SOLUTIONS LIMITED PARTNERSHIP

发明人： NATAN E. PARSONS ,  JOEL S. NOVAK

IPC分类号： E03B7/07 ,  A47K5/12 ,  B01D21/30 ,  E03C1/042 ,  E03C1/05 ,  F16K31/06 ,  G01S7/534 ,  G01S15/52 ,  B01D36/00

CPC分类号： E03C1/057 ,  A47K5/1217 ,  G01S7/534 ,  G01S15/523 ,  Y10T137/8158 ,  Y10T137/87507 ,  Y10T137/87877

公开(公告)号：US4648057A

公开(公告)日：1987-03-03

申请号：US611811

申请日：1984-05-18

申请人： Ronald A. Wagstaff ,  Jean L. Berrou

发明人： Ronald A. Wagstaff ,  Jean L. Berrou

IPC分类号： G01S7/534 ,  G06F17/00 ,  G06F15/31

CPC分类号： G01S7/534

摘要： A nonlinear technique for high-resolution data processing produces high-rlution power spectra from the output of a conventional processor. First, a "guess" of the spectral estimate is formed. Then the spectral estimate is convolved with the system response function to produce estimated output levels. The differences between the estimated output levels and the measured output levels are used to modify the spectral estimate to produce a new "guess". This process is repeated until certain criteria are satisfied.

摘要翻译： 用于高分辨率数据处理的非线性技术从常规处理器的输出产生高分辨率功率谱。 首先，形成光谱估计的“猜测”。 然后，频谱估计与系统响应函数进行卷积，以产生估计的输出电平。 估计输出水平与测量输出水平之间的差异用于修改频谱估计值以产生新的“猜测”。 重复该过程直到满足某些标准。

公开(公告)号：US4498052A

公开(公告)日：1985-02-05

申请号：US756613

申请日：1976-12-23

申请人： Noel O. Fothergill

发明人： Noel O. Fothergill

IPC分类号： G01S7/534 ,  H03H11/12 ,  H03F1/26 ,  H03F1/30

CPC分类号： H03H11/1217 ,  G01S7/534

摘要： A time averaging circuit which increases significantly the signal to noise ratio of a received signal. The output of a multiplier which provides near D.C. signals with the noise is fed to a metal core transformer through an operational amplifier. The secondary winding output of the transformer is partly subtracted from the input in the operational amplifier, enhancing the D.C.-like signal components. Time integration via the feed back loop results in the A.C. noise components being relatively reduced in amplitude. The A.C. noise components from the secondary of the transformer and the output of the operational amplifier are subtracted in a second operational amplifier, the output signal of which has substantially increased signal to noise ratio. A pre-processing circuit includes a multiplier which multiplies the received signal with a narrow band-width portion thereof, tuned to the signal frequency, which enriches the near D.C. energy.

摘要翻译： 时间平均电路，显着增加接收信号的信噪比。 提供靠近D.C.信号与噪声的乘法器的输出通过运算放大器馈送到金属铁心变压器。 变压器的次级绕组输出部分从运算放大器的输入部分减去，增强了类似D.C的信号分量。 通过反馈回路的时间积分导致A.C.噪声分量的振幅相对减小。 来自变压器次级的交流噪声分量和运算放大器的输出在第二运算放大器中减去，其运算放大器的输出信号具有显着增加的信噪比。 预处理电路包括乘法器，该乘法器将接收到的信号与其窄带宽部分相乘，调谐到信号频率，这丰富了近D.C.能量。

公开(公告)号：US4288764A

公开(公告)日：1981-09-08

申请号：US87609

申请日：1979-10-23

申请人： Lip H. Ong

发明人： Lip H. Ong

IPC分类号： G01S7/534 ,  G10K11/34 ,  G11C27/04 ,  H03H15/02 ,  H03K5/159 ,  G11C19/28 ,  H03H11/36 ,  H03H17/08

CPC分类号： H03H15/023 ,  G01S7/534 ,  G10K11/341 ,  G11C27/04

摘要： A time delay and integrate signal processing device is provided to which, in use, a clock signal having a duty cycle which varies linearly with time at a predetermined rate is applied at an input. The number of delay stages in the path of signals from a plurality of input taps is determined in accordance with a predetermined function of the rate of change of the clock duty cycle.Embodiments of the invention may be employed to advantage in SONAR applications where signals are received from a plurality of transducers to scan a sector by constructive summation of signal returns. The predetermined function may be chosen to minimize distortion during a scan and so scanning may take place at a higher rate than with prior art devices enabling full coverage of the sector with good range resolution to be achieved with a single device.

摘要翻译： 提供时间延迟和积分信号处理装置，在使用中，在输入端施加具有以预定速率随时间线性变化的占空比的时钟信号。 根据时钟占空比的变化率的预定函数确定来自多个输入抽头的信号的路径中的延迟级的数量。 本发明的实施例可以用于SONAR应用中，其中从多个换能器接收信号以通过信号返回的建设性求和扫描扇区。 可以选择预定功能以使扫描期间的失真最小化，因此可以以比现有技术的设备更高的速率进行扫描，使得能够利用单个设备实现具有良好的范围分辨率的扇区的全面覆盖。

公开(公告)号：US4280202A

公开(公告)日：1981-07-21

申请号：US89930

申请日：1979-10-31

申请人： Roger F. Koppelmann

发明人： Roger F. Koppelmann

IPC分类号： G01S7/534 ,  G01S15/02

CPC分类号： G01S7/534

摘要： A digital homodyne processing system is disclosed and includes a hydrophone, a preamplifier for amplifying the hydrophone output signal, a heterodyne circuit and a low-pass filter for filtering the amplified hydrophone output, and a digital-to-analog converter. The output of the digital-to-analog converter is compared against sine and cosine references and is integrated as a function of the sine and cosine references. The integration results are processed for detection of a coded waveform.

摘要翻译： 公开了一种数字零差处理系统，包括水听器，用于放大水听器输出信号的前置放大器，用于对放大的水听器输出进行滤波的外差电路和低通滤波器以及数模转换器。 将数模转换器的输出与正弦和余弦参考进行比较，并作为正弦和余弦参考的函数进行积分。 处理积分结果以检测编码波形。

公开(公告)号：US4279019A

公开(公告)日：1981-07-14

申请号：US39154

申请日：1979-05-15

申请人： Richard C. Heyser

发明人： Richard C. Heyser

IPC分类号： G01N29/34 ,  G01S7/52 ,  G01S7/534 ,  G01S15/89 ,  G01V1/36 ,  G06F15/20 ,  G01S9/23

CPC分类号： G01S7/534 ,  G01N29/348 ,  G01S15/8977 ,  G01S7/52036 ,  G01V1/368 ,  G01V2210/58

摘要： A method and apparatus is disclosed for determining the manner by which an initial injection of wave energy is modified by a medium under test using a time delay spectrometer (TDS) and a fast Fourier transform (FFT). A switch allows either the time delay spectrum or an energy-time curve to be displayed. A differentiator at the input of the FFT corrects for inverse square loss of energy through the medium, i.e., compensates for spherical expansion of energy. Different arrangements of the TDS adapt the system to a medium having variable time delay, or adapt the system for measurement of harmonic distortion through the medium.

摘要翻译： 公开了一种用于确定通过使用时间延迟谱仪（TDS）和快速傅里叶变换（FFT）通过被测试介质来修改波能的初始注入的方式的方法和装置。 开关允许显示时间延迟谱或能量时间曲线。 FFT输入处的微分器校正通过介质的能量的平方平方损失，即补偿能量的球形扩展。 TDS的不同布置使系统适应具有可变时间延迟的介质，或者通过介质适应用于测量谐波失真的系统。