Communications – electrical: acoustic wave systems and devices – Echo systems – Side scanning or contour mapping sonar systems
Reexamination Certificate
2008-01-01
2008-01-01
Lobo, Ian J. (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Echo systems
Side scanning or contour mapping sonar systems
Reexamination Certificate
active
07315487
ABSTRACT:
A processing method of this invention relates to an angle of arrival estimation technique, where by a high resolution bathymetric sidescan sonar signal process method it measure the micro-geomorphy of the sea bottom. That is the multi-subarray sub-space fitting method. The invention shows that when the array elements number is fixed, no matter there is mutual coupling or not between array elements, there exists one subarray which has the smallest phase estimation standard deviation, the method of this invention overcomes the phase error caused by mutual coupling and enhances the measurement precision.
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patent: 6873570 (2005-03-01), Zhu et al.
Weiqing Zhu et al, “High Resolution Bathymetric Sidescan Sonar”, Oceans '02 MTS/IEEE Publication Date: Oct. 29-31, 2002, vol. 1, pp. 223-227 vol. 1.
Bird et al, “Analysis of Swath Bathymetry Sonar Accuracy”, Oceanic Engineering, IEEE Journal of, Apr. 2005, vol. 30, Issue: 2, pp. 372-390.
Liu Xiaodong
Xu Wen
Zhu Weiqing
Institute of Acoustics Chinese Academy of Sciences
Li Manni
Lobo Ian J.
Perkins Coie LLP
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