Efficiency of Software and Algorithms of Aperture Synthesis in Passive Sonar Devices on Test and Real Signals
O. Y. Dashevskii, E. S. Nezhevenko
Keywords: processing of hydroacoustic signals, aperture synthesis, ETAM algorithm, modeling, FUTA (flexible underwater towed array)
Pages: 70-81
Abstract
A SynApp program is developed for studying the algorithms of processing data obtained by arrays with a synthesized aperture in passive sonar devices. Various synthesis algorithms are compared, and the best algorithm is chosen on the basis of particular criteria. Inspection of program operation with signals obtained by a real array demonstrates the efficiency of synthesis with the use of the ETAM algorithm. Application of synthesis in passive sonar devices is proved to reduce the array aperture without deterioration of the bearing quality. The effect of the changes in the array subaperture used for synthesis and the size of the synthesized aperture (number of synthesis steps) on the bearing quality is studied.
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