In the case of a single pressure-gradient vector hydrophone, if the ratio of its diameter to wavelength fails to satisfy the engineering approximation conditions, the direct calculation of the angle through the arc ta...
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ISBN:
(纸本)9798350386288;9798350386271
In the case of a single pressure-gradient vector hydrophone, if the ratio of its diameter to wavelength fails to satisfy the engineering approximation conditions, the direct calculation of the angle through the arc tangent method for directional of arrival (DOA) estimation will result in a significant estimation error. While using the modified sound intensity method to correct its array flow pattern, a higher signal-to-noise ratio is required. This paper presents the upper limit for the diameter-to-wavelength ratio and introduces a refined approach for estimating the direction of arrival (DOA) by employing a mapping function replacement the modified sound intensity method. The proposed method improves the performance of the estimation of DOA based on a single pressure-gradient vector hydrophone, particularly in scenarios with low signal-to-noise ratios. Simultaneously, this method serves to broaden the applicable frequency range for azimuth angle estimation. The simulation findings provide empirical evidence supporting the efficacy and superiority of the proposed algorithm.
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