【摘要】 拖船辐射噪声严重影响拖线阵声纳的探测性能,该噪声是成分复杂、多途传播的近程强干扰,如何抵消该噪声是拖线阵声纳面临的一个难题。在讨论了拖船噪声的成因、谱特性以及多途传播路径等问题后,通过对拖船辐射噪声的特性分析及逆波束形成(Inverse Beamforming,IBF)算法的理论研究,并经仿真表明:基于IBF算法的拖船噪声干扰抵消技术能够有效抵消拖船辐射噪声。海试数据验证了抵消后目标信号所在方位更清晰,且能识别出弱目标信号,其抗多途效果好。该方法易于实现,抵消效果显著,具有一定的实用性和可行性。更多还原

【Abstract】 The tow ship radiated noise is a kind of short-range interference with complex composition and the charac-teristic of multi-path propagation,which seriously affects the detection performance of towed line array sonar.With discussion of the noise origin,the spectrum characteristic and the multi-paths of propagation,it shows that the inter-ference canceling technique based on IBF algorithm can be used to effectively eliminate the tow ship radiated noise characterized by multi-path propagation.Simulation results of using IBF and sea trial data prove that the DOA of the target signal gets clearer and the weak target signal can be better recognized after cancellation.更多还原