Folegot Thomas, Martinelli Giovanna, Guerrini Piero, Stevenson J Mark
NATO Undersea Research Centre, Viale San Bartolomeo 400, 19126 La Spezia, Italy.
J Acoust Soc Am. 2008 Nov;124(5):2852-60. doi: 10.1121/1.2977675.
An algorithm allowing simultaneous detection and localization of multiple submerged targets crossing an acoustic tripwire based on forward scattering is described and then evaluated based upon data collected at sea. This paper quantifies the agreement between the theoretical performance and the results obtained from processing data gathered at sea for crossings at several depths and ranges. Targets crossing the acoustic field produce shadows on each side of the barrier, for specific sensors and for specific acoustic paths. In post-processing, a model is invoked to associate expected paths with the observed shadows. This process allows triangulation of the target's position inside the acoustic field. Precise localization is achieved by taking advantage of the multipath propagation structure of the received signal, together with the diversity of the source and receiver locations. Environmental robustness is demonstrated using simulations and can be explained by the use of an array of sources spatially distributed through the water column.
描述了一种基于前向散射同时检测和定位多个穿越声学绊网的水下目标的算法，然后根据在海上收集的数据对其进行评估。本文量化了理论性能与在海上处理不同深度和距离处穿越数据所获得结果之间的一致性。对于特定的传感器和特定的声路径，穿越声场的目标会在障碍物两侧产生阴影。在后期处理中，调用一个模型将预期路径与观测到的阴影关联起来。这个过程允许对目标在声场中的位置进行三角测量。通过利用接收信号的多径传播结构以及源和接收器位置的多样性来实现精确的定位。使用模拟证明了环境鲁棒性，这可以通过在水柱中空间分布的源阵列来解释。
