HYDROACOUSTICS
ANNUAL JOURNAL
START NEW VOL 19 SEARCH STATISTICS PAS - GDANSK DIVISION

High-precision bearing estimation for active sonar with cylindrical array, performed by interpolated array transformation

pp. 265-276, vol. 19, 2016

Wojciech Leśniak
Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Poland

Key words: interpolated array transformation

Abstract: The article presents a method for improving the accuracy of bearing in multibeam sonar with a cylindrical array. The antenna’s non-linear shape and the resulting non-uniform sampling of the signal in space, mean that known methods of high-resolution spectral analysis cannot be used. In order to apply an algorithm from this group, a linear virtual antenna must be produced. The paper presents a technique of mapping a cylindrical array to the equivalent linear form. The simulation results present the accuracy of bearing estimation in the presence of white noise. Furthermore, the limitations of the method and practical aspects of the application in a real sonar system are discussed.

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