Results 1 to 10 of about 40,688 (257)
An Enhanced Data-Driven Array Shape Estimation Method Using Passive Underwater Acoustic Data
Remote Sensing, 2021 Beamforming-based signal enhancement technologies in passive sonar array processing often have poor performance due to array distortion caused by rapid tactical maneuvers of the towed platform, oceanic currents, hydrodynamic effects, etc.
Qisong Wu +5 more
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A Nonlinear Data-Driven Towed Array Shape Estimation Method Using Passive Underwater Acoustic Data
Remote Sensing, 2022 Large-aperture towed linear hydrophone array has been widely used for beamforming-based signal enhancement in passive sonar systems; however, its performance can drastically decrease due to the array distortion caused by rapid tactical maneuvers of the ...
Qisong Wu, Youhai Xu
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IEEE Access, 2021 The horizontal floating linear array is a new type of array used to detect deep-sea targets. Reliable target detection depends on the estimation accuracy of the array shape.
Zonglun Che +5 more
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The estimation of the shape of an array using a hidden Markov model [PDF]
IEEE Journal of Oceanic Engineering, 1993 In this paper a hidden Markov model technique for the estimation of the shape of a towed array is presented. It is assumed that there is a farfield source radiating sound containing possibly weak spectral lines. The technique uses either the Fourier coefficients at a given frequency computed from a single time block or the maximal eigenvector of a ...
Quinn, Barry G. +3 more
exaly +3 more sources
Remote SensingThe deformation of the array shape during the turning process of an autonomous underwater vehicle (AUV)-towed line array sonar can significantly degrade its remote sensing performance.
Junxiong Wang +3 more
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Estimation of Flexible Ultrasound Array Shape Using Phase Coherence
IEEE Transactions on Biomedical EngineeringAn algorithm to estimate the shape of a flexible ultrasound array transducer from backscattered ultrasound signals is presented. The algorithm exploits the phase variation across the receive channels to compute an array shape focusing criterion related to the array shape.
Jan D'Hooge
exaly +3 more sources
Measurement: Sensors, 2021 We propose a three-dimensional self-positioning method of the single microphone situated in the acoustic field containing the steered Bessel beams generated by a two-dimensional planar ultrasound phased array.
Keisuke Hasegawa
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Estimation of phase velocity using array observation of microtremors with arbitrary shape
Earth, Planets and Space, 2023 To estimate the phase velocity using the array observations of microtremors, some algorithms for the estimation include constraints on the array shape, such as equilateral triangles or the placement of receivers on a circle, in order to reduce the ...
Harusato Kimura +3 more
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IET Radar, Sonar & Navigation, 2023 For improving performance of the towed array sonar during the manoeuvring period, a processing framework is proposed based on joint estimation of direction of arrival (DOA) and the array shape.
Xiang Pan +3 more
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Tuning the Angular Characteristics of Biomimetic Antenna Arrays
IEEE Open Journal of Antennas and Propagation, 2023 The angle estimation capabilities of radar sensors are strictly linked to the antenna spacing between the array elements. A larger array aperture corresponds to a smaller beam width or in terms of the angle estimation a higher phase sensitivity.
Ines Dorsch +3 more
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