LabSTICC (UMR CNRS 6285), ENSTA Bretagne (UEB), 2 rue François Verny, 29806 Brest Cedex 9, France.
J Acoust Soc Am. 2013 Aug;134(2):EL230-6. doi: 10.1121/1.4813846.
In many oceanic waveguides, acoustic propagation is characterized by a parameter called waveguide invariant. This property is used in many passive and active sonar applications where knowledge of the waveguide invariant value is required. The waveguide invariant is classically considered as scalar but several studies show that it is better modeled by a distribution because of its dependence on frequency and mode pairs. This paper presents a new method for estimating the waveguide invariant distribution. Using the noise radiated by a distant ship and a single hydrophone, the proposed methodology allows estimating the waveguide invariant for each pair of modes in shallow water. Performance is evaluated on simulated data.
在许多海洋波导中，声传播的特征是一个称为波导不变量的参数。该特性在许多无源和有源声纳应用中都有使用，这些应用都需要了解波导不变量的值。波导不变量经典上被认为是标量，但有几项研究表明，由于其对频率和模态对的依赖性，最好通过分布来建模。本文提出了一种估计波导不变量分布的新方法。利用远处船只辐射的噪声和单个水听器，该方法允许在浅水中对每一对模态估计波导不变量。在模拟数据上评估了性能。
