active sonar
On Doppler Mismatch of Linear Frequency Modulated Waveforms in Active Sonar Applications
... have conducted a performance analysis of LFM. A few mathematical expressions connected with LFM can also be found in the work by Chan et. al. 8 . Baldacci et. al. 6 in their work have explained an Adaptive Algorithm for ...
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Behavioral responses of satellite tracked Blainville's beaked whales (Mesoplodon densirostris) to mid frequency active sonar
... to sonar exposure (see Figure 1 and Table ...mid-frequency active sonar (MFAS) phases of Submarine Commanders Courses (SCC) on the AUTEC range between 2009 and ...
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Performance Comparison of Transmission Waveforms for Active Sonar Detection
... an Active Sonar System and the use of waveforms in Active Sonar ...in Active Sonar Systems has been conducted by Glisson ...of Sonar data described by Baldacci ...
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Active Sonar Detection in Reverberation via Signal Subspace Extraction Algorithm
... by active sonar is CW in the new algorithm which performs well in detection and estimation even when low Doppler is ...real, active-sonar data and simulated ...
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Adaptive filtering of reverberation for active sonar signal detection
... Ambient noise is generated in the sea by many sources: wave action, thermal agita tion, rainfall, seismic events, sounds made by animals, etc. Although these sources are localised, ambient noise is an all-pervading ...
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Reverberation suppression using non negative matrix factorization to detect low Doppler target with continuous wave active sonar
... In active sonar systems, the detection of echo from targets can deteriorate due to reverberation. Detection becomes more difficult if targets have low-Doppler frequency and are located near the ...
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Mitigation of harm during a novel behavioural response study involving active sonar and wild cetaceans
... Some studies of how human activities can affect wild free-ranging animals may be considered to have potential negative outcomes too severe to be ethically studied. This creates a societal dilemma involving choices ...
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The use of active sonar to study cetaceans
... The data presented here may show how breathing at the surface by whales could be an important source in term of TS variation that should be considered for active acoustic detection. The distribution of TS ...
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Sonar for Environmental Monitoring: Construction of a Multifunctional Active Acoustic Platform Applied for Marine Renewables
... [3,4]. Sonar systems are divided in passive or active ...passive sonar listen for incoming sounds emitted from any specific object or ...background. Active sonar emits pulses of sound ...
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Disguised Bionic Sonar Signal Waveform Design with Its Possible Camouflage Application Strategy for Underwater Sensor Platforms
... covert sonar signal waveform design approach with its possible camouflage application strategy by utilizing bio-inspired ...bionic sonar signal model is presented, which is then utilized to construct ...
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Tracking Algorithms for Multistatic Sonar Systems
... measurements. Sonar performance prediction modelling shows that only rarely two distributed sensors have a similar quality on a specific ping of the target ...
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The effects of sound propagation and avoidance behaviour on naval sonar levels received by cetaceans
... of active sonar is deemed to be essential for naval operations, but its impact on marine mammals has raised concerns ...to sonar may sometimes have beneficial outcomes for the whale ...2009). ...
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Arduino Based Sonar
... Passive sonar systems may have large sonicdatabases , but the sonar operator usually finally classifies the signals ...Passive sonar on vehicles is usually severely limited because of noise generated ...
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New Constructions of Sonar Sequences
... The main object of this paper is to present new constructions of sonar sequences independent of those given above. Our new construction (Theorem 10) uses specials one–dimensional Sidon sets that are useful to ...
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A CTFM synthetic aperture sonar
... hydrophone length projector length length of real aperture length of synthetic aperture number of frames per sweep noise power number of integrated pulses isotropic sea noise intensity i[r] ...
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Acoustic water bottom investigation with a remotely operated watercraft survey system
... provide sonar images, depth data, and synchronized positioning information via GNSS (global navigation satellite ...system). Sonar images differ depending on acoustic sources; 50 to 200 kHz acoustic sources ...
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Object representation for multi beam sonar image using local higher order statistics
... for sonar image included local Fourier histogram features [16], local invariant feature [17], and undecimated discrete wavelet transform features ...real sonar SAS data, the influence of the signal- ...
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Sonar for environmental monitoring: Configuration of a multifunctional active acoustics platform applied for marine renewables
... used sonar systems to monitor fish and mammal interaction with tidal turbines and wave energy converters; [11-13] used multi- beam sonar systems to map seabed within hydrokinetic ...using active ...
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Directional receiver for biomimetic sonar system
... a sonar system equipped with an emitter and two directional receivers and inspired by bat echolocation uses knowledge of the beam pattern of the receivers to estimate target ...this sonar system and 3D ...
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Learning Place Cells from Sonar Data
... A place cell system is developed that is able to provide robust localisation using simple sonar information only. The system uses egocentric view cells, based on the Adaptive Response Function Neuron, as sensory ...
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