V. A. Bashkarev1, A. S. Pereselkov2
1, 2 Voronezh State University (Voronezh, Russia)

1 bvainf@gmail.com, 2 pereselkov.edu@yandex.ru

In practice, solving the problem of localizing the source of hydroacoustic oscillations in a shallow sea requires at least determining its radial and tangential velocities, initial distance, and direction (bearing). Requirements for accuracy and speed of location estimates are continuously increasing. To achieve multiple improvements in efficiency, research on the use of unconventional methods is necessary. The interferometric approach in various fields of physics has enabled significant gains in efficiency; its application to processing hydroacoustic signals is a relatively new direction.

The objective of the article is to analyze the effectiveness of estimates of the radial velocity and distance to the target based on interferometric processing of the hydroacoustic signal. The study explores the feasibility of its application in practice considering the assumptions made in the theoretical derivation of the analytical dependencies used for estimation of the source parameters of interest.

Publications on the topic have been reviewed, with particular focus on the assumptions made when obtaining analytical expressions proposed by the authors for solving the problem of determining the radial velocity of the object and its initial distance. The efficiency of the method and the criticality of the assumptions in the derivation of analytical dependencies have been evaluated by numerical experiment based on the modal approach. Analysis covers a wide range of receiver parameters (frequencies and observation time) and source parameters (distances and velocity values). Universal reception parameters have been identified (receiver constants, frequency bands, and observation time) at which the target accuracy in source parameter estimation has been achieved.

The practical applicability of using analytical dependencies for the estimation of radial velocity and initial distance to a broadband acoustic oscillation source during interferometric processing of hydroacoustic signals has been verified, as well as the criticality of the assumptions made in their derivation for the accuracy of estimates in the shallow sea scenario has been established.

Bashkarev V.A., Pereselkov A.S. Effectiveness of interferometric estimations of range and radial velocity of a broadband sound source in an ocean waveguide. Antennas. 2026. № 2. P. 48–59. DOI: https://doi.org/10.18127/j03209601-202602-05 (in Russian)

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