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HYDROACOUSTICS
ANNUAL JOURNAL |
START | NEW VOL 20 | SEARCH | STATISTICS | PAS - GDANSK DIVISION |
pp. 41-46, vol. 18, 2015 Krzysztof Czarnecki Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Department of Marine Electronic Systems, Gdańsk, Poland Wojciech Leśniak Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Department of Marine Electronic Systems, Gdańsk, Poland Key words: reassignment method; time-frequency analysis; direction of arrival Abstract: In this paper, a novel method of bearing estimation in a passive sonar system with a towed
array is introduced. The classical approach of bearing estimation based on the spatial spectrum
[1] is extended by using the synchrosqeezing method that is a part of the reassignment method
introduced by Kodera et al. [2]. Using this method leads to a clear bearing estimation. The
proposed method requires a relatively small amount of computation, because of the possibility
of using the FFT algorithm. Moreover, the immunity of the method against AWGN is tested for
a selected sonar array with respect to the direction of arrival and the signal frequency.
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