Cramer-Rao bounds for different vector-hydrophone's configurations located near a pressure-release boundary
Javad Ahmadi‐Shokouh, Hengameh Keshavarz · 2006
An underwater acoustic vector-hydrophone is employed to solve the passive direction finding problem. A proposed vector-hydrophone configuration consists of three spatially collocated but orthogonally oriented velocity-hydrophones and a collocated pressure-hydrophone. In this paper, different configurations are evaluated to identify an efficient vector-hydrophone configuration which still enables the directional of arrival estimation. The best vector-hydrophone structure is obtained by identifying the necessary and sufficient vector-hydrophone composition nonsingularity in the Fisher information matrix. Recommended for direction finding near a pressure-release boundary are a pressure hydrophone collocated with a collocated pair of x-axis and y-axis velocity hydrophones.