Abstract:

The intrinsic essence of direction of arrival (DOA) estimation of the vector hydrophone array utilizing the estimation of signal parameters via the rotational invariance technique (ESPRIT) algorithm is analyzed and the theoretical error formulas for several DOA estimation methods are deduced. There is a large fluctuation with source direction of DOA estimation performance directly using the particle velocity components. Aiming at this problem, a weighted angle fusion algorithm is proposed. The DOA estimation errors of simulation are in good agreement with the theoretical errors. The simulation results also indicate that the proposed method improves the accuracy of directionfinding and decreases the standard deviation fluctuation of DOA estimation with source direction compared with the existing algorithm.