2010
DOI: 10.1155/2010/304103
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Underwater Broadband Source Localization Based on Modal Filtering and Features Extraction

Abstract: Passive source localization is a crucial issue in underwater acoustics. In this paper, we focus on shallow water environment (0 to 400 m) and broadband Ultra-Low Frequency acoustic sources (1 to 100 Hz). In this configuration and at a long range, the acoustic propagation can be described by normal mode theory. The propagating signal breaks up into a series of depth-dependent modes. These modes carry information about the source position. Mode excitation factors and mode phases analysis allow, respectively, loc… Show more

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Cited by 12 publications
(3 citation statements)
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“…Modal filtering is a method that estimates the source depth by passing the received signal through a binary mask filter. This allows for the extraction of modes of the actual sound source, which are then matched with modes of the simulated sound source [7][8][9]. However, this method requires well-sampled wave fields and is not robust.…”
Section: Introductionmentioning
confidence: 99%
“…Modal filtering is a method that estimates the source depth by passing the received signal through a binary mask filter. This allows for the extraction of modes of the actual sound source, which are then matched with modes of the simulated sound source [7][8][9]. However, this method requires well-sampled wave fields and is not robust.…”
Section: Introductionmentioning
confidence: 99%
“…The warping transformation is constantly being perfected and can be used in a non-ideal shallow water waveguide [8,9] and a range-dependent shallow water waveguide [10]. The warping transformation is now widely used for the passive location of an underwater source [11,12,13,14,15,16,17,18]. For instance, according to the invariant frequency characteristics of the Fourier transform spectrum of the received signal, the approximate relation between the extracted value of the characteristic frequency and the invariant frequency is deduced when the propagation distance is unknown and the source range is estimated by a single sensor [19].…”
Section: Introductionmentioning
confidence: 99%
“…The corresponding pattern is called the frequency-time diagram and is often plotted in theoretical considerations and on the basis experi mental data [22]. This pattern reveals the shapes of the dispersion curves for individual modes and is much used for solving various problems [23]. The position of the observation point used in our calculations is shown in Fig.…”
mentioning
confidence: 99%