Trajectory Estimation of Moving Target in the Medium with a Strong Scattering
The coordinate estimation of moving target in sea medium (in active or passive mode) is based on the measurement of angle spectrum by 2D beamforming. The term “beamforming” automatically implies that hydroacoustical system executes the solution of reverse wave problem. In other words at first the system is forming the 2D- angle spectrum of incident waves on array what is the same that the reconsruction of source function. Then one can estimate the angle coordinates from maximum of angle response using different procedures. In free space beamforming is based on Fourie-Frenel transformations and on a priory estimation of Green’s function for inhomogeneous medium. The last procedure is known as matchfield signal processing.
KeywordsAcoustical Physic Angle Estimation Acoustical Image Strong Scattering Line Array
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- 1.V.D. Svet, T.V. Kondrat’eva, N.V. Zuikova, Application of Speckle Interferometry to Problems of Ocean Acoustics, Acoustical Physics, v.42, # 2(1996).Google Scholar
- 2.V.D. Svet, T.V. Kondrat’eva, N.V. Zuikova, Estimation of the Distance to the Source Placed Under Scattering Layer, Acoustical Physics, v.43, # 2(1997).Google Scholar
- 3.V.D. Svet, T.V. Kondrafeva, N.V. Zuikova, Estimation of Angle Source Movement in a Multimode Waveguide, Acoustical Physics.(1997) (to be published)Google Scholar
- 4.Franson M. Speckle-Optics, Mir, Moscow(1980).Google Scholar