Underwater Acoustic Target Tracking with Fixed Passive Sonar System
Abstract:An algorithm for target tracking with twin, linear arrays passive sonar system is proposed in the paper. Three main computation steps of this algorithm are presented. First the bearings of detected targets are determined by each array. Frequency domain methods like MUSIC or Capon's minimum variance beamforming (MVB) are assumed for bearing estimation. For updating the bearings in subsequent time moments an iterative method for tracking the orthogonality function (MUSIC) extremum is suggested. This method is faster than standard grid search and does not require repeated identification and association. Proper bearings, after identifying as true target azimuths and associating are crossed for target position determination. Formulas for position determination by cross-bearing are presented in the paper as the next step of the algorithm. For smoothing the target trajectory and computing the movement parameters an effective polynomial least squares fitting algorithm is proposed at the last computation step. The results of real target tracking based on experimental data acquired by a fixed sonar system designed and built at Marine Technology Centre are presented in the last section of the paper.
Document Type: Research Article
Publication date: 2002-09-01
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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