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IEEE JOURNAL OF OCEANIC ENGINEERING, VOL. 36, NO. 4, OCTOBER 2011 665 A New Synthetic Aperture Sonar Processing Method
 

Summary: IEEE JOURNAL OF OCEANIC ENGINEERING, VOL. 36, NO. 4, OCTOBER 2011 665
A New Synthetic Aperture Sonar Processing Method
Using Coherence Analysis
Neil Wachowski, Student Member, IEEE, and Mahmood R. Azimi-Sadjadi, Senior Member, IEEE
Abstract--This paper introduces two methods that use a co-
herence analysis framework to generate synthetic aperture sonar
(SAS)-like images that display acoustic color (AC) information
useful for the classification of buried and/or proud underwater
objects. The first method is applicable to sonar backscatter
collected with multiple hydrophones and involves forming two
channels using the data of two hydrophone subarrays at each
frequency and over several pings. The second method is intended
for applications where sonar backscatter is collected using a single
hydrophone and involves forming two channels using the data
of two synthetic subarrays at each frequency. In both cases, the
resulting SAS-like AC images display information in a ping-fre-
quency plane, and hence convey information that is useful for the
detection, localization, and classification of underwater objects
based on properties that are typically not conveyed by conven-
tional SAS images. The single-hydrophone version of SAS-like

  

Source: Azimi-Sadjadi, Mahmood R. - Department of Electrical and Computer Engineering, Colorado State University

 

Collections: Computer Technologies and Information Sciences