Proceedings ArticleDOI
Adaptive cardioid processing
H. Cox,R.M. Zeskind +1 more
- pp 1058-1061
Reads0
Chats0
TLDR
Algorithms for adaptively steering the null of a cardioid to achieve interference rejection are developed and of particular interest is the nulling of highly directional reverberation when sonobuoys are considered as multistatic active receivers.Abstract:
Algorithms for adaptively steering the null of a cardioid to achieve interference rejection are developed. The algorithms are basically broadband, but by frequency filtering it is easy to steer independently in different frequency bands. Of particular interest is the nulling of highly directional reverberation when sonobuoys are considered as multistatic active receivers. Simple adaptive algorithms are shown to be effective in simulations. >read more
Citations
More filters
Journal ArticleDOI
Near-field/far-field azimuth and elevation angle estimation using a single vector hydrophone
TL;DR: A new underwater acoustic eigenstructure ESPRIT-based algorithm that yields closed-form direction-of-arrival (DOA) estimates using a single vector hydrophone that significantly outperforms an array of spatially displaced pressure hydrophones of comparable array-manifold size and computational load but may involve more complex hardware.
Journal ArticleDOI
Root-MUSIC-based azimuth-elevation angle-of-arrival estimation with uniformly spaced but arbitrarily oriented velocity hydrophones
TL;DR: This novel underwater acoustic azimuth-elevation source localization scheme realizes the eigenstructure-based polynomial rooting procedure for an L-shaped uniformly spaced array of diversely oriented and possibly spatially co-located velocity hydrophones and an optional pressure hydrophone.
A Tutorial on Bayesian Estimation and Tracking Techniques Applicable to Nonlinear and Non-Gaussian Processes
TL;DR: An overview of techniques for nonlinear filtering for a wide variety of conditions on the nonlinearities and on the noise is presented and a general Bayesian approach to filtering is developed which is applicable to all linear or nonlinear stochastic systems.
Journal ArticleDOI
CramÉr-Rao Bounds for Direction Finding by an Acoustic Vector Sensor Under Nonideal Gain-Phase Responses, Noncollocation, or Nonorthogonal Orientation
P.K. Tam,Kainam Thomas Wong +1 more
TL;DR: In this article, a characterization of how these unknown nonidealities degrade direction-finding accuracy, via Cramer-Rao bound analysis, is presented. But the authors do not consider the effect of the unknown non-ideality in the acoustic vector sensor's gain response, phase response, collocation or orthogonal orientation among its constituent velocity sensors.
Journal ArticleDOI
Beam patterns of an underwater acoustic vector hydrophone located away from any reflecting boundary
Kainam Thomas Wong,Hoiming Chu +1 more
TL;DR: In this article, the spatial matched filter beam patterns (a.k.a. fixed or conventional or maximum signal-to-noise ratio beam patterns) and the minimum variance distortionless response (MVDR) are associated with a single underwater acoustic vector hydrophone distant from any reflecting boundary.
References
More filters
Book ChapterDOI
Fundamentals of Bistatic Active SONAR
TL;DR: The purpose of this paper is to provide an introduction to bistatic active sonar and the extension to multiple sources and receivers is straightforward and involves the same concepts and principles.