We study the performances of several computationally efficient and simple techniques for estimating direction of arrival (DOA)\nof an underwater acoustic source using a single acoustic vector sensor (AVS) in shallow water. Underwater AVS is a compact\ndevice, which consists of one hydrophone and three accelerometers in a packaged form, measuring scalar pressure and three dimensional\nacceleration simultaneously at a single position. A very controlled experimental setup is prepared to test how\nwell-known techniques, namely, arctan-based, intensity-based, time domain beamforming, and frequency domain beamforming\nmethods, perform in estimating DOA of a source in different circumstances. Experimental results reveal that for almost all cases\nbeamforming techniques perform best. Moreover, arctan-based method, which is the simplest of all, provides satisfactory results\nfor practical purposes.
Loading....