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On methods to improve time delay estimation for underwater acoustic source localization

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Title On methods to improve time delay estimation for underwater acoustic source localization
 
Creator Patel, Bipin
Vadali, Siva Ram Krishna
Nandy, Sambhunath
Shome, Sankar Nath
 
Subject Detection
GCC-PHAT
Localization
Time delay estimation
Underwater acoustic communication
 
Description 237-244
This paper addresses the problem of acoustic
source localization in shallow water environment commonly dominated by impulsive
noise and multipath phenomenon. Traditionally acoustic source localization with
sensors spaced several wavelengths apart involves Time Delay Estimation (TDE)
via Generalized Cross-Correlation Phase Transform (GCC-PHAT)1.
However multipath signals and impulsive noise in underwater ambience result in
spurious peaks leading to anomalous time delay estimates, and in turn erroneous
computation of source location. In the present work we recommend two methods to
improve time delay estimation, based on order statistics and via signal
detection. Simulation results indicate a significant improvement in time delay
estimation as compared to GCC-PHAT in presence of impulsive noise and multipath induced fading.
 
Date 2016-07-04T09:10:28Z
2016-07-04T09:10:28Z
2015-02
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/34643
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.44(02) [February 2015]