Results 281 to 290 of about 4,113,395 (325)

Characterization of active sonar targets

2018
<p>The problem of characterization of active sonar target response has important applications in many fields, including the currently cost-prohibitive recovery of unexploded ordinance on the ocean floor. We present a method for recognizing these objects using a multidisciplinary approach that fuses machine learning, signal processing, and feature
Daniel Schupp-Omid, Ananya Sen Gupta, Mark Andersland, Anton Kruger   +3 more
openaire   +2 more sources

Multi-waveform active sonar tracking

2007 International Waveform Diversity and Design Conference, 2007
This paper extends the NURC distributed multi-hypothesis tracking technology to include Doppler sensitive (CW) processing. The assessment of the value-added of CW processing in automated undersea detection and tracking is ongoing.
D. Hughes, Stefano Coraluppi, A. Baldacci, Craig Carthel, M. Micheli   +4 more
openaire   +2 more sources

Active Sonar Image Classification Using Deep Convolutional Neural Network Evolved by Robust Comprehensive Grey Wolf Optimizer

Neural Processing Letters, 2023
Maryam Najibzadeh, A. Mahmoodzadeh, Mohammad Khishe   +2 more
semanticscholar   +1 more source

Adaptive waveform selection for active sonar

Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 2002
Investigates an adaptive waveform selection scheme where selection is based on overall tracking performance of the active sonar system. The assumption of an optimal receiver allows the inclusion of transmitted waveform specification parameters in the tracking sub-system equations, leading to a waveform selection scheme where the next transmitted ...
D.J. Kershaw, R.J. Evans
openaire   +2 more sources

Synthetic aperture active sonar imaging

[Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, 1992
The main problems involved in synthetic aperture sonar imaging are medium instability, slow mapping rate, and platform motion. Proposed solutions to these problems are reviewed, and a new technique for synthetic aperture sonar imaging is presented which allows a fast mapping rate and improved motion compensation.
B.L. Douglas, Hua Lee
openaire   +2 more sources

Automatic Object Classification for Low-Frequency Active Sonar using Convolutional Neural Networks

OCEANS 2019 MTS/IEEE SEATTLE, 2019
Neural Networks are proposed to classify underwater objects from active sonar system data collected for underwater surveillance. The raw signal is processed, transformed in the time-frequency domain and classified (object of interest/clutter). The values
G. de Magistris, P. Stinco, Jeffrey R. Bates, J. Topple, G. Canepa, G. Ferri, A. Tesei, K. le Page   +7 more
semanticscholar   +1 more source

Rational-Orthogonal-Wavelet-Based Active Sonar Pulse and Detector Design

IEEE Journal of Oceanic Engineering, 2019
A family of rational orthogonal wavelets is explored in active sonar detection to achieve Doppler robustness and noise mitigation. The broadband active sonar system is classified as wavelet-based noncoherent subband energy detection.
Limin Yu, Fei Ma, Enggee Lim, En Cheng, L. White   +4 more
semanticscholar   +1 more source

Performance Enhancement of Active Sonar System in Under Water Environment Using Spherical Hydrophone Array

International Conference on Advances in Electrical Engineering, 2019
Sonar is an odor meaning of sound to navigate objects under the water surface. Though Active and passive are the two types of sonar, designing of active Sonar system is a benignant issue for underwater beamforming.
I. Rahaman, Md. Selim Hossain, Md. Yousuf Hossain, Nadim Hosen   +3 more
semanticscholar   +1 more source

A Study on Feedback and Feedforward Control of High Power Transmitters for Active Sonar

IEEE International Future Energy Electronics Conference, 2019
Active sonar is mainly used for underwater communication and detection. Sensor array of active sonar has the impedance characteristics that the changes greatly and instantaneously due to mutual impedance.
Seung-Min Song, In-Dong Kim, Byung-hwa Lee, Jeong-Min Lee   +3 more
semanticscholar   +1 more source

Acoustic Image Simulator Based on Active Sonar Model in Underwater Environment

2018 15th International Conference on Ubiquitous Robots (UR), 2018
Underwater tasks such as maintenance, inspection, target recognition, or simultaneous localization and mapping (SLAM) require accurate underwater information.
Ngoc Trung Mai, Yonghoon Ji, Hanwool Woo, Y. Tamura, A. Yamashita, H. Asama   +5 more
semanticscholar   +1 more source