Theoretical performance and experimental results for synthetic aperture sonar self-calibration

Author

Billon, Didier ; Fohanno, Franck

Author_Institution

Thomson Marconi Sonar SAS, Brest, France

Volume

2

fYear

1998

fDate

28 Sep-1 Oct 1998

Firstpage

965

Abstract

The paper deals with the methods exploiting the ping-to-ping correlation of the random wave signals from sea bottom backscattering in order to perform synthetic aperture self-calibration. The Cramer-Rao lower bounds for the propagation time delay and the array rotation between two successive pings, estimated in these methods, and the related upper bound for the resolution gain of the synthetic aperture processing are derived. Examples of synthetic aperture images from a ROV-mounted sonar, where the resolution gain values on the order of 10 are in good agreement with the previous theoretical performance, are shown

Keywords

calibration; image resolution; sonar imaging; synthetic aperture sonar; Cramer-Rao lower bounds; ROV-mounted sonar; array rotation; experimental results; ping-to-ping correlation; propagation time delay; random wave signals; resolution gain; sea bottom backscattering; synthetic aperture images; synthetic aperture processing; synthetic aperture sonar self-calibration; theoretical performance; upper bound; Array signal processing; Backscatter; Delay effects; Delay estimation; Frequency estimation; Image resolution; Performance gain; Signal resolution; Synthetic aperture sonar; Upper bound;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '98 Conference Proceedings

Conference_Location

Nice

Print_ISBN

0-7803-5045-6

Type

conf

DOI

10.1109/OCEANS.1998.724381

Filename

724381