Results 11 to 20 of about 1,058 (187)
EURASIP Journal on Advances in Signal Processing, 2023 Development of beamforming methods for towed sonar multiplet line arrays is stimulated by their increased use in undersea surveillance. Such methods employ various forms of narrowband optimal beamforming to resolve port/starboard ambiguity present when ...
Sergey Simakov, Simon Lourey
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An omega‐k algorithm for multireceiver synthetic aperture sonar
Electronics Letters, 2023 In this Letter, the authors present a novel imaging algorithm for multireceiver synthetic aperture sonar (SAS). The Loffeld's bistatic formula (LBF) including quasi‐monostatic (QM) and multireceiver deformation (MD) phases is first reformulated into ...
Xuebo Zhang, Peixuan Yang, Haixin Sun
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Improved high-precision approach based on deconvolution in MIMO sonar imagery
The Journal of Engineering, 2019 Multiple-input multiple-output (MIMO) sonar enables high-resolution imaging, which is extremely useful in underwater acoustic high-precision imagery.
Lu Yan, Shengchun Piao, Feng Xu
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Reflections on “Parametric acoustic array,” source of virtual-array sonars [PDF]
The Journal of the Acoustical Society of America, 2021 The Reflections series takes a look back on historical articles from The Journal of the Acoustical Society of America that have had a significant impact on the science and practice of acoustics.
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Sensors, 2020 Sonars are essential for underwater sensing as they can operate over extended ranges and in poor visibility conditions. The use of a synthetic aperture is a popular approach to increase the resolution of sonars, i.e., the sonar with its N transducers is ...
Heiko Bülow, Andreas Birk
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Coherent and Noncoherent Joint Processing of Sonar for Detection of Small Targets in Shallow Water
Sensors, 2018 A coherent-noncoherent joint processing framework is proposed for active sonar to combine diversity gain and beamforming gain for detection of a small target in shallow water environments.
Xiang Pan +5 more
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Measuring of False Peaks Occurring via Planar Antenna Arrays DOA Estimation
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems, 2017 Direction-of-arrival (DOA) of radio signals takes a great scientific interest for radar, sonar and wireless communication tasks. In this paper the problem of DOA estimation methods for circular and concentric circular antenna arrays is considered.
Yuri B. Nechaev, Ilia W. Peshkov
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An ADS-Based Sparse Optimization Method for Sonar Imaging Sensor Arrays
Applied Sciences, 2020 The Mills Cross sonar sensor array, achieved by the virtual element technology, is one way to build a low-complexity and low-cost imaging system while not decreasing the imaging quality.
Jiancheng Liu +3 more
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Radial Velocity Estimation for Multiple Objects Using In-Air Sonar With MIMO Virtual Arrays
IEEE Access, 2023 As autonomous platforms become more advanced, it is useful to obtain more information about the environment. Classic vision sensors such as RGB-D cameras, LiDAR, or acoustical imaging cameras are capable of accurately displaying the location of an object
Robin Kerstens +2 more
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Cognitive adaptation of sonar gain control in the bottlenose dolphin. [PDF]
PLoS ONE, 2014 Echolocating animals adjust the transmit intensity and receive sensitivity of their sonar in order to regulate the sensation level of their echoes; this process is often termed automatic gain control. Gain control is considered not to be under the animal'
Laura N Kloepper +5 more
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