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This paper addresses the problem of passive wideband localization of a shallow water noise source in near-field with a horizontal array in the presence of multipath propagation. Multipath propagation gives rise to attenuated and time-delayed replicas of the original transmitted signal. The conventional beamforming approach to wideband localization involves the coherent signal-subspace method (CSM)...
It has been an acceptable conclusion that the vector sound intensity array can estimate the direction of sound sources in high precision in an isotropic noise field, but the error in anisotropic noise field has not been systematically studied yet. The error in doa estimation caused by an anisotropic noise field is analyzed in detail here by taking the ocean surface noise field introduced by cron and...
By constructing a novel symmetric subarrays structure, a new 3-D near-field source localization algorithm is proposed. The new method can be divided into three important parts. The first part is the elevation angle estimation based on two generalized ESPRIT algorithm by a vertical uniform linear array, which are spectral search-based generalized ESPRIT and search-free generalized ESPRIT. And the second...
The problem of estimating the directions of arrival (DOAs) of perfectly correlated signals in the near-field (the Fresnel region of the array aperture) is considered. A new estimation algorithm which combines the ideas of spatial smoothing and array interpolation in the near-field is derived. The proposed technique can be applied to uniform linear array geometries in the near-field when the ranges...
Vector sound intensity can be used to locate sound sources. The typical vector sound intensity array is composed of three pairs of sensors with pairs aligned along orthogonal axes. Each sensor pair provides one of the components of the three dimensional intensity vector which is the time average of the product of the pressure and particle velocity at the center of the sensor pair. In the conventional...
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