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Performance Bounds On The Passive Localization Of A Moving Source For Ocean Acoustics


Performance Bounds On The Passive Localization Of A Moving Source For Ocean Acoustics
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Performance Bounds On The Passive Localization Of A Moving Source For Ocean Acoustics


Performance Bounds On The Passive Localization Of A Moving Source For Ocean Acoustics
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Author : Hee Chun Song
language : en
Publisher:
Release Date : 1990

Performance Bounds On The Passive Localization Of A Moving Source For Ocean Acoustics written by Hee Chun Song and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.




The Journal Of The Acoustical Society Of America


The Journal Of The Acoustical Society Of America
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Author :
language : en
Publisher:
Release Date : 2009

The Journal Of The Acoustical Society Of America written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Music categories.




Performance Bounds On Matched Field Methods For Source Localization And Estimation Of Ocean Environmental Parameters


Performance Bounds On Matched Field Methods For Source Localization And Estimation Of Ocean Environmental Parameters
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Author : Wen Xu
language : en
Publisher:
Release Date : 2001

Performance Bounds On Matched Field Methods For Source Localization And Estimation Of Ocean Environmental Parameters written by Wen Xu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Parameter estimation categories.


Matched-field methods concern estimation of source location and/or ocean environmental parameters by exploiting full wave modeling of acoustic waveguide propagation. Typical estimation performance demonstrates two fundamental limitations. first, sidelobe ambiguities dominate the estimation at low signal-to-noise ratio (SNR), leading to a threshold performance behavior. Second, most matched-field algorithms show a strong sensitivity to environmental/system mismatch, introducing some biased estimates at high SNR. In this thesis, a quantitative approach for ambiguity analysis is developed so that different mainlobe and sidelobe error contributions can be compared at different SNR levels. Two large-error performance bounds, the Weiss-Weinstein bound (WWB) and Ziv-Zakai bound (ZZB), are derived for the attainable accuracy of matched-field methods. To include mismatch effects, a modified version of the ZZB is proposed. Performance analyses are implemented for source localization under a typical shallow water environment chosen from the Shallow Water Evaluation Cell Experiments (SWellEX). The performance predictions describe the simulations of the maximum likelihood estimator (MLE) well, including the mean square error in all SNR regions as well as the bias at high SNR. The threshold SNR and bias predictions are also verified by the SWellEX experimental data processing. These developments provide tools to better understand some fundamental behaviors in matched-field performance and provide benchmarks to which various ad hoc algorithms can be compared.



Rle Progress Report


Rle Progress Report
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Author : Massachusetts Institute of Technology. Research Laboratory of Electronics
language : en
Publisher:
Release Date : 1991

Rle Progress Report written by Massachusetts Institute of Technology. Research Laboratory of Electronics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Electronics categories.




Performance Bounds On Source Range Estimation In Uncertain Acoustic Ocean Channels


Performance Bounds On Source Range Estimation In Uncertain Acoustic Ocean Channels
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Author : Sunil Narasimhan
language : en
Publisher:
Release Date : 1994

Performance Bounds On Source Range Estimation In Uncertain Acoustic Ocean Channels written by Sunil Narasimhan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Signal processing categories.




Physics Briefs


Physics Briefs
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Author :
language : en
Publisher:
Release Date : 1993

Physics Briefs written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Physics categories.




Model Based Ocean Acoustic Passive Localization


Model Based Ocean Acoustic Passive Localization
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Author :
language : en
Publisher:
Release Date : 1994

Model Based Ocean Acoustic Passive Localization written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.




Passive Localization Of An Underwater Acoustic Source Using Directional Sensors


Passive Localization Of An Underwater Acoustic Source Using Directional Sensors
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Author :
language : en
Publisher:
Release Date : 1995

Passive Localization Of An Underwater Acoustic Source Using Directional Sensors written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.


This thesis studies the passive localization (bearing estimation and range and depth estimation) of a single stationary underwater acoustic source in a two-path (direct and surface-reflected path) environment. The main objective of the study is to synthesize and then analyze a passive localization system with a two-receiver (vertically separated) structure that can be supported by a single sonobuoy. Each of the two receivers consists of a cluster of directional sensors uniformly located on a small circle in a horizontal plane. The gain profile of the directional sensors is such that it depends only on bearing of source. Source bearing is estimated from the average signal powers received at two adjacent sensors in one of the two clusters. The focus in the study of bearing estimation is on the feasibility of energy-based bearing estimators. The range and depth information of the source is extracted from the 6 estimated time differences of arrivals (TDOAs) at the two receivers. The emphasis in the study of range and depth estimation is on the correlation among the multipath TDOA estimators and its effect on the prediction of the variance of the time delay-based range and depth estimators. Two algorithms for energy-based bearing estimation are developed. Expressions for the bias and variance of both energy-based bearing estimators are derived. They reveal a fairly simple relationship between the performance of the two bearing estimators and the design parameters (the omnidirectional signal-to-noise ratio and the two receiver parameters). Using the developed expressions can provide good predictions of the bias and variance of the two energy-based bearing estimators in the case of reasonable signal-to-noise ratios. The range and depth estimators are investigated with time delay techniques. Fifteen expressions for the covariance among the six multipath TDOA estimators are derived. It is shown that all six multipath TDOA estimators are correlated and the degree of the corre.



Dissertation Abstracts International


Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 1991

Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Dissertations, Academic categories.






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Author :
language : en
Publisher: CRC Press
Release Date :

written by and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.