수중 빔형성 음향 신호의 PWVD를 이용한 표적 탐지

Abstract

Because of clutter or reverberation in the water, it is difficult to distinguish a target from them with a beamforming image. It is well-known that the pseudo Wigner-Ville distribution, which is highresolution time-frequency processing, can detect target signals effectively. In this study, the pseudo Wigner-Ville distribution with the beamformed signals was analyzed to detect an underwater target. The acoustic signals were measured using an array system consisting of a transmitting transducer and a line array of 16 elements at sea. The target was an air-filled aluminum spherical shell with a thin thickness. The transmitted signal was 3 to 8 kHz linear frequency modulation continuous waveforms. The experiment results show that the target can be easily identified with the pseudo Wigner-Ville distribution.