Results 11 to 20 of about 2,503,305 (272)
Optimal Deployment of Vector Sensor Nodes in Underwater Acoustic Sensor Networks [PDF]
Sensors, 2019 Underwater acoustic sensor networks have recently attracted considerable attention as demands on the Internet of Underwater Things (IoUT) increase. In terms of efficiency, it is important to achieve the maximum communication coverage using a limited ...
Sunhyo Kim, Jee Woong Choi
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Vector Sensor Arrays in Underwater Acoustic Applications [PDF]
, 2010 Traditionally, ocean acoustic signals have been acquired using hydrophones, which measure the pressure field and are typically omnidirectional. A vector sensor measures both the acoustic pressure and the three components of particle velocity. Assembled into an array, a vector sensor array (VSA) improves spatial filtering capabilities when compared with
Santos, P., Felisberto, P., Jesus, S. M.
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Acoustic vector-sensor array processing. [PDF]
, 2010 Existing theory yields useful performance criteria and processing techniques for acoustic pressure-sensor arrays. Acoustic vector-sensor arrays, which measure particle velocity and pressure, offer significant potential but require fundamental changes to algorithms and performance assessment.
Kitchens, Jonathan Paul
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Vector sensor array based higher order acoustic sensors
2014 22nd Signal Processing and Communications Applications Conference (SIU), 2014 Higher order acoustic sensors rely on the spatial gradients of the acoustic pressure field for achieving high directivity. Two practical methods for realizing higher order acoustic sensors using acoustic vector sensor arrays are presented. The first method relies on short linear arrays of closely spaced 2-D vector sensors. The second method is based on
Gur, M. Berke
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A novel calibration method for Acoustic Vector Sensor
OCEANS 2016 MTS/IEEE Monterey, 2016 The Acoustic Vector Sensor can measure both pressure and particle velocity information of acoustic field at a point in space. By using the acoustic pressure and particle velocity information, a single AVS can get the unbiased estimation of target's bearing.
null Yao Zhang +2 more
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Blind Calibration for Acoustic Vector Sensor Arrays
2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2018 In this paper, we present a calibration algorithm for acoustic vector sensors arranged in a uniform linear array configuration. To do so, we do not use a calibrator source, instead we leverage the Toeplitz blocks present in the data covariance matrix. We develop linear estimators for estimating sensor gains and phases.
Krishnaprasad Nambur Ramamohan +4 more
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Acoustic vector-sensor array performance [PDF]
, 2008 Classical hydrophones measure pressure only, but acoustic vector-sensors also measure particle velocity. Velocity measurements can increase array gain and resolve ambiguities, but make vector-sensor arrays more difficult to analyze. This thesis derives a new set of useful performance measures for acoustic vector-sensor arrays.
Kitchens, Jonathan Paul
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Modal beamforming for circular acoustic vector sensor arrays
The Journal of the Acoustical Society of America, 2017 Vector sensors are directional receivers that measure the vectorial particle velocity associated with an acoustic wave rather than the scalar pressure. Therefore, arrays of vector sensors possess some desirable directional properties compared to conventional arrays of pressure sensors.
Gur, Berke
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Distinguishing multiple surface ships using one acoustic vector sensor based on a convolutional neural network [PDF]
JASA Express Letters, 2022 A direction of arrival (DOA) estimation method based on a convolutional neural network (CNN) using an acoustic vector sensor is proposed to distinguish multiple surface ships in a selected frequency band.
Huaigang Cao, Qunyan Ren
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Sensors, 2023 Signal acquisition and sensing in underwater systems and applications is typically a challenging issue due to the small signal strength within the background noise.
Rami Rashid, Erjian Zhang, Ali Abdi
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