Experimental Investigations of Interference Patterns of Broadband Low Frequency Sound in Ocean Waveguides Inhomogenous in Range

Sharonov, G. A.; Kerzhakov, B. V.; Kulinich, V. V.; Lazarev, Vladimir A.; Соколов, А. Д.

doi:10.1063/1.1486276

Cited by 3 publications

(2 citation statements)

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“…With the progress of shock absorption and noise reduction technology, the radiated noise of underwater moving platform in the high frequency band is lower and lower. Scholars such as Kuperman and D’Spain [ 18 , 19 , 20 , 21 , 22 , 23 ] have carried out a lot of research work in the field of ocean acoustic interference phenomena and signal processing. Brekhovskikh and Lysanov et al [ 24 , 25 , 26 ] defined an important scalar parameter of acoustic waveguide interference structure (waveguide invariant) and described the nature and application of the waveguide invariant.…”

Section: Introductionmentioning

confidence: 99%

A Three-Dimensional Target Depth-Resolution Method with a Single-Vector Sensor

Zhao

Jiang

et al. 2018

Sensors

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This paper mainly studies and verifies the target number category-resolution method in multi-target cases and the target depth-resolution method of aerial targets. Firstly, target depth resolution is performed by using the sign distribution of the reactive component of the vertical complex acoustic intensity; the target category and the number resolution in multi-target cases is realized with a combination of the bearing-time recording information; and the corresponding simulation verification is carried out. The algorithm proposed in this paper can distinguish between the single-target multi-line spectrum case and the multi-target multi-line spectrum case. This paper presents an improved azimuth-estimation method for multi-target cases, which makes the estimation results more accurate. Using the Monte Carlo simulation, the feasibility of the proposed target number and category-resolution algorithm in multi-target cases is verified. In addition, by studying the field characteristics of the aerial and surface targets, the simulation results verify that there is only amplitude difference between the aerial target field and the surface target field under the same environmental parameters, and an aerial target can be treated as a special case of a surface target; the aerial target category resolution can then be realized based on the sign distribution of the reactive component of the vertical acoustic intensity so as to realize three-dimensional target depth resolution. By processing data from a sea experiment, the feasibility of the proposed aerial target three-dimensional depth-resolution algorithm is verified.

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Section: Introductionmentioning

confidence: 99%

A Three-Dimensional Target Depth-Resolution Method with a Single-Vector Sensor

Zhao

Jiang

et al. 2018

Sensors

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“…Waveguide invariance, introduced first by Chuprov [3], has been widely used to describe the interference structure of sound propagation [4][5][6][7]. The waveguide invariance reveals that the sound intensity has striations in the range-frequency distribution, and the slope of the striations is described as waveguide invariant.…”

Section: Introductionmentioning

confidence: 99%

Interference structure of shallow water reverberation in time-frequency distribution

Zhang

et al. 2010

Sci. China Phys. Mech. Astron.

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The striations of the reverberation spectrum in the time-frequency distribution were observed in a shallow water acoustic experiment in 2002. A model following the coherent reverberation model developed in 2002 is presented to explain the observed striations. To examine the consistency between the measured data and numerical predictions, we have used a method based on Radon transform for determining the slope of the striations to the measured reverberation data and numerical predictions. The results indicate that the previously developed coherent reverberation model can predict the interference structure of the reverberation intensity in the time-frequency distribution. reverberation, interference, time-frequency, waveguide invariant PACS: 43.30.Bp, 43.30.Gv, 43.30.Re

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Effect of environmental mismatch on range estimation using waveguide invariant: theoretical analysis, simulations and experimental results

Guo

Pan

2007

IET Radar Sonar Navig.

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Experimental Investigations of Interference Patterns of Broadband Low Frequency Sound in Ocean Waveguides Inhomogenous in Range

Cited by 3 publications

References 0 publications

A Three-Dimensional Target Depth-Resolution Method with a Single-Vector Sensor

A Three-Dimensional Target Depth-Resolution Method with a Single-Vector Sensor

Interference structure of shallow water reverberation in time-frequency distribution

Effect of environmental mismatch on range estimation using waveguide invariant: theoretical analysis, simulations and experimental results

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