基于声矢量传感器的分布式定位系统在水下宽带声源定位中的应用

Application of distributed positioning system based on acoustic vector sensors

提出了基于声矢量传感器的分布式浮标网络定位系统,研究了不同应用背景下单个声矢量传感器的测向算法,推导了目标DOA估计的Cramer-Rao界,给出了分层海水介质中多个声矢量传感器的几何定位算法。数值仿真结果表明:(1)系统的定位性能强烈依赖于接收信噪比;(2)该系统适用于单一强声源的定位。

A new architecture of distributed buoy network based on acoustic vector sensors has been presented in this paper. In order to explore its performance, algorithms of DOA estimation using a single acoustic vector sensor in different scenarios are studied, and the Cramer-Rao lower bound of the DOA estimator in free space is also derived. Finally, with respect to jointly localize the underwater wideband target in horizontally stratified ocean, a new method based on ray theory is given. Numerical simulations show that the performance of this distributed system depends significantly on the signal to noise ratio at the receivers and it is only applicable to localize the single dominant source.