Subspace intersection method of high-resolution bearing estimation in shallow ocean using acoustic vector sensors

Nagananda, K. G. ; Anand, G. V. (2010) Subspace intersection method of high-resolution bearing estimation in shallow ocean using acoustic vector sensors Signal Processing, 90 (1). pp. 105-118. ISSN 0165-1684

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S01651...

Related URL: http://dx.doi.org/10.1016/j.sigpro.2009.05.023

Abstract

The subspace intersection method (SIM) provides unbiased bearing estimates of multiple acoustic sources in a range-independent shallow ocean using a one-dimensional search without prior knowledge of source ranges and depths. The original formulation of this method is based on deployment of a horizontal linear array of hydrophones which measure acoustic pressure. In this paper, we extend SIM to an array of acoustic vector sensors which measure pressure as well as all components of particle velocity. Use of vector sensors reduces the minimum number of sensors required by a factor of 4, and also eliminates the constraint that the intersensor spacing should not exceed half wavelength. The additional information provided by the vector sensors leads to performance enhancement in the form of lower estimation error and higher resolution.

Item Type:Article
Source:Copyright of this article belongs to European Association for Signal Processing.
Keywords:Subspace Intersection Method (SIM); High-resolution Bearing Estimation; Acoustic Vector Sensors (AVS); Shallow Ocean
ID Code:519
Deposited On:21 Sep 2010 11:48
Last Modified:12 May 2011 06:32

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