DocumentCode :
1451798
Title :
Spatial covariance and adaptive beam forming of high-frequency acoustic signals forward scattered from the sea surface
Author :
McDaniel, Suzanne T.
Author_Institution :
Appl. Res. Lab., Pennsylvania State Univ., State College, PA, USA
Volume :
16
Issue :
4
fYear :
1991
fDate :
10/1/1991 12:00:00 AM
Firstpage :
415
Lastpage :
419
Abstract :
The author addresses the spatial coherence of high-frequency acoustic signals that have been forward scattered from the sea surface. The Fresnel-corrected Kirchhoff approximation is applied to derive closed-form expressions for the spatial coherence. These expressions are used to study the influence of geometrical and environmental factors on the coherence. An application of the theory involving the rejection of the surface image of a source by a vertical adaptive line array is presented. The author concludes that the environment has a strong impact on the array processing of surface-scattered fields through its influence on both vertical and horizontal spatial coherence
Keywords :
acoustic signal processing; oceanographic equipment; oceanography; sonar; ultrasonic equipment; ultrasonic scattering; underwater sound; Fresnel-corrected Kirchhoff approximation; US; adaptive beam forming; array processing; closed-form expressions; forward scattering; high-frequency acoustic signals; ocean; sea surface; spatial coherence; surface-scattered fields; vertical adaptive line array; Acoustic arrays; Acoustic beams; Acoustic scattering; Adaptive arrays; Environmental factors; Kirchhoff´s Law; Rough surfaces; Sea surface; Spatial coherence; Surface roughness;
fLanguage :
English
Journal_Title :
Oceanic Engineering, IEEE Journal of
Publisher :
ieee
ISSN :
0364-9059
Type :
jour
DOI :
10.1109/48.90907
Filename :
90907
Link To Document :
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