干扰存在时被动声呐工作背景建模与分析

在实际应用中,声呐的工作背景除了各向同性背景噪声外,通常还会存在干扰。干扰存在时经典的被动声呐方程存在一定的局限性。在经典被动声呐方程的基础上,讨论了干扰对被动声呐工作背景的影响。提出了一种更加实用的工作背景模型,并详细分析了波束域的工作背景模型,应用此背景模型对经典被动声呐方程进行了修正,修正后的方程可用于干扰存在时被动声呐的性能预报。最后通过不同干噪比条件下的仿真验证了波束域工作背景模型的正确性。提出的工作背景模型可为被动声呐设备在干扰存在条件下的性能预报提供参考。

Modeling and analysis of passive sonar working background under directional interference

Passive sonar equation can be used to forecast sonar range. The working background is usually supposed to be isotropic noise. However, directional interference often exists in real application, where the application of classic passive sonar equation is limited. Based on the classic passive sonar equation, the influence of directional interference on the passive sonar working background is discussed, and a more useful working background model for passive sonar under directional interference is presented with the detailed analysis of the working background model in beam domain. The passive sonar equation is modified according to this model, and then it can be used to forecast sonar range under directional interference. Finally, the correctness of the working background model in beam domain is validated by simulation in different interference to noise ratios. The presented model can provide an important reference for acoustic compatible analysis and performance prediction of passive sonar under directional interference.