Determination of the parameters of motion for an underwater object

Matveev, A. L.; Mityugov, V. V.

doi:10.1134/1.1507202

Cited by 4 publications

(8 citation statements)

References 4 publications

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“…The special cases of incoherent and coherent accumulations are realized when and , respectively. The may be written as a sum of useful signal and noise (17) If the parameters of the filter coincide with the true parameters of signal (4), the integral in (9) can be evaluated analytically. The resulting signal then has the form (18) where and are the useful signal amplitude and phase, respectively, for a hydrophone located at depth .…”

Section: Partially Coherent Accumulation With Coherent Signalmentioning

confidence: 99%

“…The algorithm [8], [17] for processing these signals is based on a model for the useful signal and on the statistical properties of the noise. It involves the following operations (Fig.…”

Section: B Incoherent Processing Algorithmmentioning

confidence: 99%

“…In [16], a method combining time matched filtering with wavefront reversal is proposed and tested, and in [17], a technique using two separated vertical arrays is suggested and experimentally tested. Theoretical developments continue in [18], where Kuz'kin considers the problem of diffraction by a body in a planar layered waveguide.…”

Section: Introductionmentioning

confidence: 99%

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Forward Scattering Observation With Partially Coherent Spatial Processing of Vertical Array Signals in Shallow Water

Matveev

Spindel

Rouseff

2007

IEEE J. Oceanic Eng.

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In this paper, we address the problem of detecting an inhomogeneity in shallow water by observing changes in the acoustic field as the inhomogeneity passes between an acoustic source and vertical line array of receivers. A signal processing scheme is developed to detect the perturbed field in the presence of the much stronger primary source signal, and to estimate such parameters as the time when the inhomogeneity crosses the source-receiver path, its velocity, and its size. The effectiveness of incoherent, coherent, and partially coherent spatial processing of the array signals is evaluated using models and data obtained from experiments in a lake. The effect of different bottom types is also considered, and it is shown that partially coherent processing can have a significant advantage depending on the bottom type. Estimates of the minimum input signal-to-noise ratios (SNRs) for which the diffracted signal can be observed are presented.

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Section: Partially Coherent Accumulation With Coherent Signalmentioning

confidence: 99%

“…The algorithm [8], [17] for processing these signals is based on a model for the useful signal and on the statistical properties of the noise. It involves the following operations (Fig.…”

Section: B Incoherent Processing Algorithmmentioning

confidence: 99%

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Forward Scattering Observation With Partially Coherent Spatial Processing of Vertical Array Signals in Shallow Water

Matveev

Spindel

Rouseff

2007

IEEE J. Oceanic Eng.

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“…This processing yielded the best performance for detection and parameter estimation. Parameters include the length and cross-section area of inhomogeneity, its velocity and range, and the intersection instant [6][7][8][9]. Coherent spatial-temporal processing for horizontal receiving arrays and the methods of observation of a scattered signal outside of a main lobe of the diagram of scattering, i.e.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Acoustic Forward Scattering on a Marine Shelf

Matveev

Korotin

Turchin

et al. 2009

2009 Third International Conference on Sensor Technologies and Applications

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The forward scattering of sound by a moving inhomogeneity can be observed when the inhomogeneity intersects a stationary path between an acoustic source and a receiving array. The scattered field is modeled as a weak perturbation of the direct signal when the inhomogeneity is near the direct path. Often the scattered field is masked by fluctuations in the direct signal. The task of a detection and parameter estimation of a moving inhomogeneity by the processing of acoustic signals as received on linear arrays is considered. After a review of methods, new experimental results are presented. The experiment was performed in the Bierke-Soond Strait of the Baltic in August 2006.The experiment geometry, propagation conditions, and spectra of direct signal fluctuations are discussed. Examples of experimental forward scattering observations obtained via various array-processing techniques are given. Good agreement between parameter estimates and true values is demonstrated for the intersection instant and the inhomgeneity's velocity, length and cross-sectional area. The minimum size of an inhomogeneity that can be observed is obtained.

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“…Different aspects of this problem, as well as the related problem of low-angle acoustic observation, were studied in [8][9][10][11][12][13][14]. For relatively small observation distances, it is reasonable to use high-frequency (HF) hydroacoustic fields [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Tomographic observation of shallow-water inhomogeneities in the case of probing by a focused high-frequency acoustic field. I. Structure of simulation model

Smirnov

Khil’ko

2009

Radiophys Quantum El

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UDC 534.26We study the possibilities of acoustic tomography observation of small-size bodies in shallow-water layered oceanic waveguides within the framework of geometric acoustics. For increasing the spatial resolution and sensitivity in the considered inverse problem, we used the waveguide-matched focusing of the received and radiated fields into the region of expected location of the observed body. The algorithm of observation in this case consists of search for a global extremum of decision statistics, which is determined by the difference between the measured data and the hypothetic body location. Such hypotheses are formed on the basis of a priori information in the form of the waveguide model and the data on the structure of the observation system. For decreasing the influence of noise associated with the interference of fields in the waveguide, selection of separate tomographic ray projections with the subsequent incoherent accumulation of partial images is used. A tomographic shallow-water observation model based on such principles is analyzed.

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Determination of the parameters of motion for an underwater object

Cited by 4 publications

References 4 publications

Forward Scattering Observation With Partially Coherent Spatial Processing of Vertical Array Signals in Shallow Water

Forward Scattering Observation With Partially Coherent Spatial Processing of Vertical Array Signals in Shallow Water

Experimental Study of Acoustic Forward Scattering on a Marine Shelf

Tomographic observation of shallow-water inhomogeneities in the case of probing by a focused high-frequency acoustic field. I. Structure of simulation model

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