Title :
Motion Compensation in SAS with Multiple Receivers Based on ISCFT Imaging Algorithm
Author :
Huang Jinquan ; Tang Jinsong ; Wang Qin ; Wu Wenquan
Author_Institution :
Inst. of Electr. Eng., Navy Univ. of Eng., Wuhan, China
Abstract :
Synthetic Aperture Sonar (SAS) performance is limited by motion errors of the towfish. It is necessary to require the towfish moving in a straight line in order to improve the imaging efficiency by Fast Fourier Transformation (FFT). However, the towfish could hardly move along a straight line because of some factors such as ocean wave, ocean current and tide. All kinds of motion errors could incur phase error in echo signal and make the quality of final image decline. The aim of this work is to lighten the influence of the motion errors in final image. Motion errors of towfish are analyzed in detail and a motion compensation (MOCO) scheme based on Inverse Scaled Fourier Transformation (ISCFT) imaging algorithm is proposed.The simulation trials validate the analysis and the scheme.
Keywords :
fast Fourier transforms; motion compensation; sonar imaging; synthetic aperture sonar; FFT; ISCFT; ISCFT imaging algorithm; SAS; fast Fourier transformation; inverse scaled Fourier transformation imaging algorithm; motion compensation scheme; synthetic aperture sonar; Algorithm design and analysis; Apertures; Fourier transforms; Imaging; Motion compensation; Receivers; Synthetic aperture sonar;
Conference_Titel :
Information Engineering and Computer Science (ICIECS), 2010 2nd International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-7939-9
Electronic_ISBN :
2156-7379
DOI :
10.1109/ICIECS.2010.5677701
