DocumentCode :
3524599
Title :
Results of a three-row synthetic aperture sonar for multipath rejection
Author :
Xu, Wen ; Chen, Qing ; Li, Jianlong ; Sun, Feng ; Pan, Xiang
Author_Institution :
Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou, China
fYear :
2010
fDate :
20-23 Sept. 2010
Firstpage :
1
Lastpage :
4
Abstract :
Synthetic aperture sonar (SAS) is an emerging technology for seafloor imaging, which has an appealing property of range- and frequency-independent spatial processing resolution. However, for a low-frequency SAS system operated in shallow water environments, there are often strong sea surface and bottom reflected multipath components that interfere with the desired echo signals. Previously a steered robust Capon beamforming method (SRCB) suitable for wideband SAS signals is developed to mitigate the effect of those interferences with a small vertically-displaced hydrophone array. In this paper, we apply this approach to experimental data of a prototype SAS imaging system. The results verify the performance improvements on output image quality over conventional processing in terms of both ghost target removal and contrast enhancement.
Keywords :
array signal processing; geophysical image processing; hydrophones; image enhancement; seafloor phenomena; sonar imaging; synthetic aperture sonar; SRCB; contrast enhancement; frequency-independent spatial processing resolution; image quality; low-frequency SAS system; multipath rejection; range-independent spatial processing resolution; seafloor imaging; shallow water environment; steered robust Capon beamforming method; three-row synthetic aperture sonar; vertically-displaced hydrophone array; wideband SAS signal; Array signal processing; Arrays; Image resolution; Imaging; Robustness; Synthetic aperture sonar; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
OCEANS 2010
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-4332-1
Type :
conf
DOI :
10.1109/OCEANS.2010.5663800
Filename :
5663800
Link To Document :
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