passive sonar
Noise-Resistant Feature Extraction from Measured Data of a Passive Sonar
... Passive sonar in underwater environments is commonly used for tracking and detection of marine ...classify sonar signals, related staffs are trained to take appropriate decisions by observing the ...
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Tonal signal detection in passive sonar systems using atomic norm minimization
... In this paper, we proposed an ANM-based frequency estimation technique to identify the tonal frequency com- ponents in the passive sonar system. The proposed tech- nique consists of two major steps. In the ...
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Time-Frequency Signal Processing Based on Fractional Fourier Transform in Passive Sonar Classification
... data SONAR classification method based on Short-Time Fractional Fourier Transform (STFrFT) ...The passive SONAR system receives the acoustic signals radiated by vessels and attempts to categorize ...
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Passive Sonar Target Detection Using Statistical Classifier and Adaptive Threshold
... with passive sonar has found so interesting for many researchers during last ten ...investigate Sonar Equation for calculate signal to noise ...in passive sonar ...
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Underwater Noise Modeling and Direction-Finding Based on Heteroscedastic Time Series
... We propose a new method for practical non-Gaussian and nonstationary underwater noise modeling. This model is very useful for passive sonar in shallow waters. In this application, measurement of additive ...
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Index Terms — SONAR , noise, signal, autocorrelation
... divers. Sonar (Sound Navigation And Ranging) is a technology which employs the propagation of sound signal to detect object and there ...viz; passive sonar and active sonar. The passive ...
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Modeling on Distance Error of Bistatic Sonar Detection
... Bistatic sonar has been widely used in military domain, such as the American Jolly system which has been used from the 1960s ...[1]. Passive sonar receives the echo from a submarine generated by an ...
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Arduino Based Sonar
... Passive sonar listens without transmitting. It is often employed in military settings, although it is also used in science applications, e.g. , detecting fish for presence/absence studies in various aquatic ...
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Detecting, assessing, and mitigating the effects of naval sonar on cetaceans
... as sonar (sound navigation and ranging). Passive sonar systems only ‘listen’ and do not generate ...Active sonar systems transmit sound pulses under water and time their return echoes to ...
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Nearfield target localization with a few snapshots for sonar array
... active sonar transmits an acoustic signal at a predetermined inter- val and then receives signals using a sensor array to find echoes that are reflected from a target, while the passive sonar which ...
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Implementation of a reliable 2D approximator using sonar
... three sonar sensors in combi- nation with a fault tolerant network of four PLASMA CPUs and will be investigated in project ...approximator. Sonar sensors are part of an approximator and it is important to ...
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The Application of Bioinspired Sonar to Cable Tracking on the Seafloor
... Figure 18 gives responses for the three targets to pulses DC1 and DC3. Whilst the former gives an excellent SNR for detection, there is little discriminatory potential between the responses for the cable and the strong ...
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Marine sediment classification using the chirp sonar
... Using this simple calibration procedure, normal incident reflectivity values obtained from the chirp sonar are used to predict porosity, density, grain size, rigid-. ity, and sound [r] ...
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How do tiger moths jam bat sonar?
... the sonar of its predators – ...the sonar-jamming ...of sonar jamming in tiger moths, and we suggest evolutionary pathways by which sonar jamming may have evolved from other tiger moth defense ...
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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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Sonar image registration for localization of an underwater vehicle
... AUVs are becoming ever more present in the ocean industry. This paper presents an example of the type of techniques that are being developed to help them perform better and become more “autonomous.” Specifically, it ...
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06 Nature of Sound.pptx
... How deep is the ocean if it takes 10 seconds for the sound to echo back to the ship. SONAR[r] ...
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Naval sonar disrupts foraging behaviour in humpback whales
... Humpback whales reduced their lunge rate during exposure to an approaching vessel.. transmitting naval low-frequency sonar signals 1.3-2.0 kHz.[r] ...
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Beaked whales respond to simulated and actual navy sonar
... in sonar-related mass strandings: Cuvier’s (Ziphius cavirostris) and Blainville’s (Mesoplodon densirostris) beaked whales ...during sonar exercises, because the location where they first heard the ...
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Directional receiver for biomimetic sonar system
... A sonar system to support them with autonomous navigation was developed by Guarato et ...a sonar system is able to reproduce bat echolocation, and is equipped with an emitter and two receivers resembling ...
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