一种基于近场传播特性的拖线阵声呐平台噪声抑制方法  

A Platform Noise Suppressing Method for Towed Line Array Sonar Based on Near-field Sound Propagation Characteristics

作　　者：陈敬军 孙纯 CHEN Jingjun;SUN Chun(The Seventh Military Representative Office of Naval Equipment Department in Shanghai,Shanghai 201108;Shanghai Marine Electronic Equipment Research Institute,Shanghai 201108)

机构地区：[1]海军装备部驻上海地区第七军事代表室,上海201108 [2]上海船舶电子设备研究所,上海201108

出　　处：《舰船电子工程》2022年第10期184-188,212,共6页Ship Electronic Engineering

摘　　要：对拖线阵声呐而言,平台辐射噪声会对远程弱目标的检测、跟踪和识别产生严重影响。论文将近场强平台辐射噪声看作球面波,而将远距离弱目标看作平面波,基于二者传播特征的差异,直接推导出了对平台噪声零响应的窄带空域滤波器。宽带空域矩阵滤波器采用分子带改变不同中心频率下通阻带范围的方法降低计算量,然后用其对阵元域数据进行宽带空域滤波来抑制平台噪声干扰。仿真及海试数据处理结果表明,利用平台噪声的球面波传播特点和对其零响应的宽带空域矩阵滤波器能够抑制拖线阵平台的强辐射噪声干扰,并因此提高了拖线阵声呐的远程弱目标被动探测性能。The detection,tracking and classification of far weak targets are strong influenced by the platform radiated noise for towed line array sonar. The near-field strong platform noise is with spherical wave,and the far-field sound is with plane wave in this paper. By these propagation characteristics,the spatial matrix filter with platform noise zero response is designed and the optimal solution of narrow spatial matrix filter is deduced directly. The broadband spatial matrix filter is calculated based on efficient subband method and is used to suppress the strong near-field platform radiated noise interference. It can be seen from the simulation and sea test data processing results that the broadband spatial matrix filter can suppress the strong noise interference of the platform. The passive detection performance of the remote weak target is improved for towed array sonar with the suppress.

关 键 词：拖线阵声呐 宽带空域矩阵滤波 平台自噪声 干扰抑制 波束形成 

分 类 号：TP911.9[自动化与计算机技术]