Robust Range Estimation Based on the Slope of the Two-Dimensional Fourier Transform Ridge Using Radon Transform

The waveguide invariant is classically considered as constant in shallow water and can be utilized to estimate the source range. When the environment is variable, the error between the estimated range and the true range fluctuates and becomes unstable. The fluctuation of the range estimation error i...

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Bibliographic Details
Published in:IEEE access 2021, Vol.9, p.24093-24104
Main Authors: Yao, Yuan, Sun, Chao, Liu, Xionghou, Jiang, Guoqing
Format: Article
Language:English
Subjects:
Coordinate transformations
Estimation
Fourier transforms
Interference
Manganese
Mathematical analysis
Polar coordinates
Radon
Radon transform
Radon transformation
range estimation
Receivers
Robustness (mathematics)
Shallow water
two-dimensional Fourier transform ridge
Waveguide invariant
Waveguide theory
Waveguides
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Summary:The waveguide invariant is classically considered as constant in shallow water and can be utilized to estimate the source range. When the environment is variable, the error between the estimated range and the true range fluctuates and becomes unstable. The fluctuation of the range estimation error is large when we use the polar coordinate transform to obtain the slope of the two-dimensional Fourier transform ridge (2DFT-PT). The lines which are parallel in the ridge are not considered and the ridge information is not utilized sufficiently. For this problem, we propose a passive ranging method by using the Radon transform to obtain the slope (2DFT-RT) and achieve a more robust result. Its capability is investigated and compared with the 2DFT-PT method via numerical simulation and the SWellEx-96 experiment.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2021.3052819