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

Nagananda, KG and Anand, GV (2010) Subspace intersection method of high-resolution bearing estimation in shallow ocean using acoustic vector sensors. In: Signal Processing, 90 (1). pp. 105-118.

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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:	Journal Article
Publication:	Signal Processing
Publisher:	Elsevier Science
Additional Information:	Copyright for this article belongs to Elsevier Science.
Keywords:	Subspace intersection method (SIM); High-resolution bearing estimation; Acoustic vector sensors (AVS); Shallow ocean
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	02 Dec 2009 05:25
Last Modified:	19 Sep 2010 05:52
URI:	http://eprints.iisc.ac.in/id/eprint/24967

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