Share Email Print

Proceedings Paper

Mine detection with the Cauchy beam-forming signal-processing approach
Author(s): Panagiotis Tsakalides; Chrysostomos L. Nikias
Format Member Price Non-Member Price
PDF $17.00 $21.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Real life sonar applications exist in which impulsive ocean channels tend to produce large- amplitude, short-duration interferences more frequently than Gaussian channels do. The stable law has been shown to successfully model noise over certain impulsive channels. In this paper, we propose new robust techniques for target detection and localization in the presence of noise modeled as a complex isotropic stable process. We develop optimal in the maximum likelihood sense approaches to the direction-of-arrival problem and we introduce the Cauchy Beamformer. We show that the Cauchy Beamformer provides better bearing estimates than the Gaussian Beamformer in a wide range of impulsive noise environments and for very low signal-to-noise ratio values. In addition, we derive the Cramer-Ratio bound on the estimation error covariance for the case of deterministic incoming signals retrieved in the presence of additive complex Cauchy noise. Finally, we demonstrate the robustness of the Cauchy Beamformer via simulation experiments.

Paper Details

Date Published: 31 May 1996
PDF: 12 pages
Proc. SPIE 2765, Detection and Remediation Technologies for Mines and Minelike Targets, (31 May 1996); doi: 10.1117/12.241236
Show Author Affiliations
Panagiotis Tsakalides, Univ. of Southern California (United States)
Chrysostomos L. Nikias, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 2765:
Detection and Remediation Technologies for Mines and Minelike Targets
Abinash C. Dubey; Robert L. Barnard; Colin J. Lowe; John E. McFee, Editor(s)

© SPIE. Terms of Use
Back to Top